Practice Test

Q1) If an isotope of hydrogen has two neutrons in its atom, its atomic number and mass number will respectively be Show Answer

Q2) Calgon used as water softener is Show Answer

Q3) What is heavy water ? Show Answer

Q4) The alum used for purifying water is Show Answer

Q5) What is formed when calcium carbide reacts with heavy water? Show Answer

Q6) The reagent commonly used to determine hardness of water titrimetrically is Show Answer

Q7) Which one of the following statements about the zeolites is false ? Show Answer

Q8) Which of the properties of interstitial hydrides is correct ? Show Answer

Q9) Which one of the following reaction does not form gaseous product ? Show Answer

Q10) Hydrogen directly combines with Show Answer

Q11) Which is the lightest gas? Show Answer

Q12) Hydrogen behaves as an oxidising agent in its reaction with Show Answer

Q13) The composition of tritium is Show Answer

Q14) Hydrogen accepts an electron to form inert gas configuration. in this it resembles Show Answer

Q15) The process used for the removal of hardness of water is Show Answer

Q16) Action of water or dilute mineral acids on metals can give Show Answer

Q17) When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution the ratio of volume of hydrogen evolved is Show Answer

Q18) One would expect proton to have very large Show Answer

Q19) The absorption of hydrogen by palladium is called Show Answer

Q20) When two ice cubes are pressed over each other,they form one cube. Which of the following forces is responsible to hold them together? Show Answer

Q21) Pure water can be obtained from sea water by Show Answer

Q22) By which of the following process permanent hardness of water can be removed ? Show Answer

Q23) Which of the following is correct for hydrogen ? Show Answer

Q24) Which of the following is formed by the action of water on sodium peroxide ? Show Answer

Q25) The H-0-H angle in water molecule is about Show Answer

Q26) Which of the following acts as both reducing and oxidising agents ? Show Answer

Q27) Which of the following will not displace hydrogen ? Show Answer

Q28) The higher density of water than that of ice is due to Show Answer

Q29) Hydrogen gas is generally prepared by the Show Answer

Q30) Zeolite is Show Answer

Q31) In para hydrogen, the electron spins are in the Show Answer

Q32) Which of the following statement is correct? Show Answer

Q33) Heavy water is usually prepared by the Show Answer

Q34) The hydrogen molecule is not very reactive under normal condition because Show Answer

Q35) The degree of hardness of water is usually expressed in terms of Show Answer

Q36) Which of the following mixture is known as the fenton's reagent? Show Answer

Q37) Ortho and para hydrogen differ in Show Answer

Q38) Which of the following statement is incorrect ? Show Answer

Q39) Which of the following statement is incorrect? Show Answer

Q40) Which of the following metals form saline hydrides? Show Answer

Q41) Water softening by clark's process uses Show Answer

Q42) Which among the following is a hydride ? Show Answer

Q43) Which is correct statement Show Answer

Q44) The set of element which could form stable, covalent hydrogen bonded hydrides are Show Answer

Q45) Temporary hardness and permanent hardness can be removed respectively by addition of Show Answer

Q46) Which of the following evolves hydrogen on reacting with cold nitric acid ? Show Answer

Q47) Which one of the following is not isotope of hydrogen ? Show Answer

Q48) The property of hydrogen which distinguishes it from alkali metals is Show Answer

Q49) The boiling point of water is exceptionally high because Show Answer

Q50) A commercial sample of hydrogen peroxide is labelled as 10 volume. Its percentage strength is nearly Show Answer

Q51) One mole of magnesium nitride on the reaction with excess of water gives Show Answer

Q52) Hydrogen will not reduce Show Answer

Q53) The oxide that give hydrogen peroxide on treatment with dilute acid is Show Answer

Q54) The sum of the number of neutrons and proton in the heaviest isotope of hydrogen is Show Answer

Q55) When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water, the sodium ions are exchanged with Show Answer

Q56) Which of the following pair will not produce dihydrogen gas? Show Answer

Q57) One mole of calcium phosphide on reaction with excess water give Show Answer

Q58) Polyphosphate are used as water softening agent because they Show Answer

Q59) Which of the following is correct about heavy water? Show Answer

Q60) Which of the following hydrides in electron deficient ? Show Answer

Q61) The maximum number of hydrogen bonds in which water molecules can participate is Show Answer

Q62) Which is used hydrogen generators Show Answer

Q63) Metal hydride on treatment with water gives Show Answer

Q64) Hydrogen burns in air with a Show Answer

Q65) Which pair does not show hydrogen isotopes Show Answer

Q66) Which is distilled first Show Answer

Q67) On reaction with Mg, very dilute nitric acid produces Show Answer

Q68) Among the following, identify the compound which cannot act as both oxidising and reducing agents Show Answer

Q69) Which of the following reaction produces hydrogen Show Answer

Q70) Hydrogen resembles in many of its properties Show Answer

Q71) Ortho and para hydrogen differ in Show Answer

Q72) Hydrogen from HCl can be prepared by Show Answer

Q73) Which of the following can adsorb largest volume of hydrogen gas Show Answer

Q74) The colour of hydrogen is Show Answer

Q75) Ordinary hydrogen at room temperature is a mixture of Show Answer

Q76) Hydrogen cannot reduce Show Answer

Q77) Hydrogen does not combine with Show Answer

Q78) The adsorption of hydrogen by metals is called Show Answer

Q79) Which of the following produces hydrolith with dihydrogen Show Answer

Q80) The metal which displaces hydrogen from a boiling caustic soda solution is Show Answer

Q81) Metals like platinum and palladium can absorb large volumes of hydrogen under special conditions. Such adsorbed hydrogen by the metal is known as Show Answer

Q82) Which is poorest reducing agent Show Answer

Q83) The sum of protons, electrons and neutrons in the heaviest isotope of hydrogen is Show Answer

Q84) Ortho-hydrogen and para-hydrogen resembles in which of the following property Show Answer

Q85) The difference between heat of adsorption of ortho and para hydrogen is Show Answer

Q86) Hydrogen can be fused to form helium at Show Answer

Q87) Which of the following metal do not liberate hydrogen from dilute hydrochloric acid Show Answer

Q88) An element reacts with hydrogen to form a compound A which on treatment with water liberates hydrogen gas. The element can be Show Answer

Q89) Hydrogen combines with other elements by Show Answer

Q90) Which of the following explanation is best for not placing hydrogen with alkali metals or halogen Show Answer

Q91) Which of the following terms is not correct for hydrogen Show Answer

Q92) When electric current is passed through an ionic hydride in the molten state Show Answer

Q93) Which of the halogen has maximum affinity for hydrogen Show Answer

Q94) Which of the following statements is most applicable to hydrogen Show Answer

Q95) Hydrogen is Show Answer

Q96) Ionization energy of hydrogen is Show Answer

Q97) Hydrogen acts as a reducing agent and thus resembles Show Answer

Q98) Which position for hydrogen explain all its properties Show Answer

Q99) Hydrogen readily combines with non-metals and thus it shows its Show Answer

Q100) The oxidation states shown by hydrogen are Show Answer

Q101) Hydrogen readily combines with metals and thus shows its Show Answer

Q102) Electrolysis of fused sodium hydride liberate hydrogen at the Show Answer

Q103) Protonic acid is Show Answer

Q104) In all its properties, hydrogen resembles Show Answer

Q105) Hydrogen molecule differs from chlorine molecule in the following respect Show Answer

Q106) Which of the following statements concerning protium, deuterium and tritium is not true Show Answer

Q107) Hydrogen has three isotopes, the number of possible diatomic molecules will be Show Answer

Q108) In which of the compounds does hydrogen have an oxidation state of -1 Show Answer

Q109) Pure hydrogen is obtained by carrying electrolysis of Show Answer

Q110) In Bosch's process which gas is utilised for the production of hydrogen gas Show Answer

Q111) Deuterium differs from hydrogen in Show Answer

Q112) Tritium undergoes radioactive decay giving Show Answer

Q113) The gas used in the hydrogenation of vegetable oils in the presence of nickel as catalyst is Show Answer

Q114) The conversion of atomic hydrogen into ordinary hydrogen is Show Answer

Q115) The name hydrogen was given by Show Answer

Q116) Triatomic hydrogen is called Show Answer

Q117) Alkali metal hydrides react with water to give Show Answer

Q118) Ionic hydrides are usually Show Answer

Q119) Group 2 hydrides with significant covalent character is/are Show Answer

Q120) Limiting compositions of f-block hydrides are Show Answer

Q121) Which one of the following substances is used in the laboratory for a fast drying of neutral gases Show Answer

Q122) Which is the lightest gas Show Answer

Q123) The composition of tritium is Show Answer

Q124) Which of the following gas is insoluble in water Show Answer

Q125) Which element forms maximum compound in chemistry Show Answer

Q126) Hydrogen is not obtained when zinc reacts with Show Answer

Q127) An ionic compound is dissolved simultaneously in heavy water and simple water. Its solubility is Show Answer

Q128) Synthetic detergents are more effective in hard water than soaps because Show Answer

Q129) Temporary hardness may be removed from water by adding Show Answer

Q130) Heavy water is Show Answer

Q131) Heavy water is compound of Show Answer

Q132) Which of the following pair of ions makes the water hard Show Answer

Q133) Temporary hardness of water can be removed by Show Answer

Q134) When zeolite (Hydrated sodium aluminium silicate) is treated with hard water the sodium ions are exchanged with Show Answer

Q135) Which of the following statements do not define the characteristic property of water "Water is a universal solvent" Show Answer

Q136) The velocity of neutrons in nuclear reactor is slowed down by Show Answer

Q137) Temporary hardness of water is due to the presence of Show Answer

Q138) Which of the following is not true Show Answer

Q139) Which of the following is not a hard water Show Answer

Q140) Heavy water is used in atomic reactor as Show Answer

Q141) Heavy water freezes at Show Answer

Q142) Which of the following is not true Show Answer

Q143) Which of the following will determine whether the given colourless liquid is water or not Show Answer

Q144) Lead pipes are not used for carrying drinking water because Show Answer

Q145) Which one of the following removes temporary hardness of water Show Answer

Q146) Which of the following will cause softening of hard water Show Answer

Q147) Which of the following process permanent hardness of water can be removed, by adding Show Answer

Q148) Permutit is technical name given to Show Answer

Q149) The approximate mass of tritium oxide molecule is Show Answer

Q150) Molecular weight of heavy water is Show Answer

Q151) Water is said to be permanently hard when it contains Show Answer

Q152) Sodium sulphate is soluble in water but barium sulphate is insoluble because Show Answer

Q153) The alum used for purifying water is Show Answer

Q154) Which of the following is correct about heavy water Show Answer

Q155) The H - O - H angle in water molecule is about Show Answer

Q156) pH of neutral water at room temperature nearly Show Answer

Q157) The low density of ice compared to water is due to Show Answer

Q158) Triple point of water is Show Answer

Q159) Hardness of water is due to presence of salts of Show Answer

Q160) In which of the following reaction hydrogen peroxide is a reducing agent Show Answer

Q161) There is a sample of 10 volume of hydrogen peroxide solution. Calculate its strength Show Answer

Q162) Hydrogen peroxide is reduced by Show Answer

Q163) Fenton's reagent is Show Answer

Q164) Hydrogen peroxide is used as Show Answer

Q165) Which one of the following is a true peroxide Show Answer

Q166) Which of the following statements is incorrect Show Answer

Q167) Nitrates of all metals are Show Answer

Q168) Polyphosphates are used as water softening agents because they Show Answer

Q169) One mole of calcium phosphide on reaction with excess water gives Show Answer

Q170) Hydrogen peroxide is Show Answer

Q171) Hydrogen can be obtained from water by Show Answer

Q172) Which of the following is/are hard water(s) Show Answer

Q173) Pick the odd one out Show Answer

Q174) Hydrogen can be obtained from water, by the action of water on Show Answer

Q175) What is true about ice Show Answer

Q176) Hydrogen will not reduce Show Answer

Q177) Which of the following pair will not produce dihydrogen gas Show Answer

Q178) Hydrogen can behave as a metal Show Answer

Q179) Out of the two allotropic forms of dihydrogen, the form with lesser molecular energy is Show Answer

Q180) Saline hydrides react explosively with water, such fires can be extinguished by Show Answer

Q181) Metals of groups 7, 8 and 9 do not form metallic hydrides. This is termed as Show Answer

Q182) The most abundant element in the universe is Show Answer

Q183) Pick out the correct statement Show Answer

Q184) Hydrogen can be produced by heating Show Answer

Q185) Plumbosolvency is a health hazard in the transportation of Show Answer

Q186) A sample of water contains sodium chloride. It is Show Answer

Q187) Hardness producing salt, whose solubility in water decreases with rise of temperature is Show Answer

Q188) A sample of water containing some dissolved table sugar and common salt is passed through organic ion exchange resins. The resulting water will be Show Answer

Q189) Water obtained by purification with organic ion exchange resins is Show Answer

Q190) Which of the following can effectively remove all types of hardness of water Show Answer

Q191) Assertion: Hydrogen combines with other elements by losing, gaining or sharing of electrons.
Reason: Hydrogen forms electrovalent and covalent bonds with other elements. Show Answer

Q192) Assertion: Acidulated water is an example of hard water.
Reason: In the presence of an acid, soap is converted into insoluble free fatty acids. Show Answer

Q193) Assertion: Hydrogen peroxide forms only one series of salts called peroxides.
Reason: Hydrogen peroxide molecule has only one replaceable hydrogen atom. Show Answer

Q194) The percentage of para hydrogen in ordinary hydrogen increases when: Show Answer

Q195) Radioactive isotope of hydrogen is Show Answer

Q196) The hardness of water is estimated by Show Answer

Q197) The ortho and para hydrogen possess: Show Answer

Q198) Which is not present in clear hard water? Show Answer

Q199) Which of the following reactions produces hydrogen? Show Answer

Q200) When different metals like Zn, Sn, Fe are added to dilute sulphuric acid, same gas, which burns explosively in air, is evolved. The gas is: Show Answer

Q201) Heavy water is represented as Show Answer

Q202) Which is not a water softener? Show Answer

Q203) The boiling point of heavy water is: Show Answer

Q204) Which will produce hard water? Show Answer

Q205) Which of the following pairs will not produce dihydrogen gas? Show Answer

Q206) Calgon used as water softner is Show Answer

Q207) Permutit is: Show Answer

Q208) The rubber foam is produced by passing oxygen through rubber foaming material. This oxygen is released from: Show Answer

Q209) Which is the poorest reducing agent? Show Answer

Q210) The number of radioactive isotopes of hydrogen is: Show Answer

Q211) The oxidation number of oxygen in hydrogen peroxide is Show Answer

Q212) The hair dyes available in the market generally contain two bottles, one containing the dye and the other hydrogen peroxide. Before applying the dye, the two solutions are mixed. The hydrogen peroxide. Show Answer

Q213) The ortho and para hydrogen differ in respect of which of the following? Show Answer

Q214) The bond energy of covalent O—H bond in water is: Show Answer

Q215) An aqueous solution of hydrogen peroxide is Show Answer

Q216) Tritium emits: Show Answer

Q217) The ratio of electron, proton and neutron in tritium is: Show Answer

Q218) Permutit is the technical name given to Show Answer

Q219) The best method to test whether a clear liquid is water, is to: Show Answer

Q220) Heavy water is qualified as heavy because it is: Show Answer

Q221) Permanent hardness can be removed by adding Show Answer

Q222) The ionization energy of hydrogen is: Show Answer

Q223) Hydrogen peroxide is prepared in the laboratory by Show Answer

Q224) Hydrogen peroxide is manufactured by the auto-oxidation of: Show Answer

Q225) Hydrogen may be prepared by heating a solution of caustic soda with: Show Answer

Q226) The most reactive state of hydrogen is: Show Answer

Q227) The number of protons, electrons and neutrons respectively in a molecule of heavy water is: Show Answer

Q228) Ordinary hydrogen is a mixture at: Show Answer

Q229) The electronic configuration of deuterium is: Show Answer

Q230) Tailing of mercury is a laboratory test for: Show Answer

Q231) Which method cannot be used to remove hardness of water? Show Answer

Q232) Which of the following could act as a propellant for rockets? Show Answer

Q233) Deuterium was discovered by: Show Answer

Q234) Heavy water possesses: Show Answer

Q235) Which one of the following is called amphoteric solvent? Show Answer

Q236) Which hydride is neutral? Show Answer

Q237) Hydrogen burns with: Show Answer

Q238) Deuterium, an isotope of hydrogen is: Show Answer

Q239) Temporary harness is caused due to the presence of: Show Answer

Q240) The life period of atomic hydrogen is: Show Answer

Q241) There is a sample of 20 volume of hydrogen peroxide solution. Calculate its strength Show Answer

Q242) When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is: Show Answer

Q243) Atomic hydrogen is obtained by: Show Answer

Q244) Which loses weight on exposure to the atmosphere? Show Answer

Q245) Which can adsorb large volumes of hydrogen gas? Show Answer

Q246) In the hydrogen peroxide molecule: Show Answer

Q247) Fluorine reacts with water to form: Show Answer

Q248) The hardness of water sample containing 0.002 mole of magnesium sulphate dissolved in a litre of water is expressed as Show Answer

Q249) When hydrogen peroxide is added to acidified potassium dichromate, a blue colour is produced due to formation of Show Answer

Q250) Ordinary hydrogen has preponderance of: Show Answer

Q251) Which of the following is an example of interstitial hydride? Show Answer

Q252) If water is boiled for sometime it becomes free from: Show Answer

Q253) Polyphosphates are used as water softening agents because they Show Answer

Q254) Hydrogen molecules are: Show Answer

Q255) Hydrogen reacts with …… even in the dark. Show Answer

Q256) The pair that yields the same gaseous product on reaction with water: Show Answer

Q257) The heaviest among the following is: Show Answer

Q258) The molarity of a 100 mL solution containing 5.1 g of hydrogen peroxide is: Show Answer

Q259) The metal that does not displace hydrogen from an acid is: Show Answer

Q260) Deionised water is obtained by passing hard water through Show Answer

Q261) Hydrogen was discovered by: Show Answer

Q262) Hard water becomes free from …… ions when passed through ion exchange resin containing RCOOH groups. Show Answer

Q263) The sum of number of neutrons and protons in one of the isotopes of hydrogen is: Show Answer

Q264) Water contracts on heating: Show Answer

Q265) Hydrogen combines directly with: Show Answer

Q266) Which statement about zeolite is false? Show Answer

Q267) High boiling point of water is due to: Show Answer

Q268) Sodium zeolite is: Show Answer

Q269) Hydrogen is not used for: Show Answer

Q270) Heavy water is manufactured in India at: Show Answer

Q271) The ionization of hydrogen atom gives: Show Answer

Q272) The melting points of most of the solid substances increase with an increase of pressure. However, ice melts at a temperature lower than its usual melting point when the pressure is increased. This is because: Show Answer

Q273) Heavy water was discovered by: Show Answer

Q274) The maximum possible number of hydrogen bonds a water molecule can form is: Show Answer

Q275) Hydrogen gas will not reduce: Show Answer

Q276)
The hardness of water is due to …. Metal ions. Show Answer

Q277) Under what conditions of temperature and pressure, the formation of atomic hydrogen from molecular hydrogen will be favoured more? Show Answer

Q278) Heavy water is not used for dinking because: Show Answer

Q279) Maximum density of heavy water is at: Show Answer

Q280) A molten ionic hydride on electrolysis gives: Show Answer

Q281) Both temporary and permanent hardness are removed on boiling water with: Show Answer

Q282) The weight percentage of deuterium in heavy water is: Show Answer

Q283) Very pure hydrogen(99.9%) can be made by which of the following processes? Show Answer

Q284) Density of water is maximum at: Show Answer

Q285) The most reactive isotope of H is: Show Answer

Q286) The exhausted Permutit is generally regenerated by percolating through it a solution of: Show Answer

Q287) The best explanations for not placing hydrogen with the group of alkali metals or halogens is: Show Answer

Q288) The geometry of water molecule is same as that of: Show Answer

Q289) Hydrogen peroxide does not: Show Answer

Q290) The most dangerous method of preparing hydrogen would be by the action of dil. HCl and: Show Answer

Q291) Hydrolysis of one mole of peroxodisulphuric acid produces: Show Answer

Q292) During hydrogenation of oil the catalyst commonly used is: Show Answer

Q293) Oxygen and hydrogen react to form water. This discovery was made by: Show Answer

Q294) Which one of the following processes will produce hard water? Show Answer

Q295) Ionic hydrides react with water to give Show Answer

Q296) Hydrogen peroxide for the first time was prepared by: Show Answer

Q297) Para hydrogen is: Show Answer

Q298) Some statements about heavy water are given below:
(i) Heavy water is used as a moderator in nuclear reactors
(ii) Heavy water is more associated than ordinary water
(iii) Heavy water is more effective solvent than ordinary water
Which of the above statements are correct?
Show Answer

Q299) When hydrolith is treated with water it yields: Show Answer

Q300) Atomic hydrogen produces formaldehyde when it reacts with: Show Answer

Q301) Hydrogen peroxide is now generally prepared on industrial scale by the: Show Answer

Q302) Tritium is obtained by: Show Answer

Q303) The formula of heavy water is: Show Answer

Q304) Hydrogen adsorbed on palladium is known as: Show Answer

Q305) Which one of the following is used for reviving the exhausted ‘permutit’? Show Answer

Q306) Nascent hydrogen consists of: Show Answer

Q307) At absolute zero: Show Answer

Q308) Hydrogen peroxide works as: Show Answer

Q309) Point out the incorrect statement. Show Answer

Q310) Hydrogen is prepared on large scale for industrial use Show Answer

Q311) Hydrogen is obtained by the action of an alloy of silicon and iron with NaOH. The process is called: Show Answer

Q312) Hydrogen peroxide when added to a solution of potassium permanganate acidified with sulphuric acid Show Answer

Q313) Water is oxidised to oxygen by Show Answer

Q314) In the preparation of hydrogenated oil the chemical reaction involving hydrogen is called: Show Answer

Q315) The most abundant isotope of hydrogen is: Show Answer

Q316) Which statement is not correct for hydrogen peroxide? Show Answer

Q317) Which one is correct for perhydrol? Show Answer

Q318) Hydrogen has a tendency to gain one electron in order to acquire helium configuration. It thus, resembles: Show Answer

Q319) Calgon is an industrial name given to: Show Answer

Q320) For the bleaching of hair, the substance used is: Show Answer

Q321) In solid hydrogen, the intermolecular bonding is: Show Answer

Q322) The species that does not contains peroxide ions is: Show Answer

Q323) When silicon is boiled with caustic soda solution, the gas evolved is: Show Answer

Q324) In which of the following reactions hydrogen peroxide is a reducing agent? Show Answer

Q325) Which does not react with cold water? Show Answer

Q326) Deuterium resembles hydrogen in chemical properties but reacts: Show Answer

Q327) Statement 1: NaCl is less soluble in heavy water than in ordinary water.
Statement 2: Dielectric constant of ordinary water is more than that of heavy water.
Show Answer

Q328) Statement 1: Hard water is more suitable than soft water.
Statement 2: Hard water can be used in steam boilers.
Show Answer

Q329) Statement 1: Water has high boiling point.
Statement 2: Water shows hydrogen bonding.
Show Answer

Q330) Statement 1: Temporary hardness can be removed by boiling.
Statement 2: One boiling the soluble bicarbonates change to carbonates which being insoluble get precipitated.
Show Answer

Q331) Statement 1: Hydrogen shows resemblance with alkali metals as well as halogens.
Statement 2: Hydrogen exists in atomic form only at high temperature.
Show Answer

Q332) Statement 1: Hydrogen ahs only two isotopes namely protium and deuterium .
Statement 2: Protium is radio active in nature.
Show Answer

Q333) Statement 1: Saline hydrides are nonvolatiles noe conducting and crystalline solids.
Statement 2: Saline hydrides are compounds of hydrogen with most of the p block elements
Show Answer