Practice Test

Q1) The percentage of oxygen in air is Show Answer

Q2) Which of the following modes of expressing concentration is independent of temperature? Show Answer

Q3) Petroleum gas is mixture of ethane, propane and butane. What is its major constituents?
Show Answer

Q4) LPG is mixture of Show Answer

Q5) Which of the following could act as a propellant for rockets ? Show Answer

Q6) An arsenious sulphide sol carries a negative charge. The maximum precipitating power for this sol is possessed by Show Answer

Q7) Smoke is an example of Show Answer

Q8) Select the one that can help distinguish between respiration and combustion Show Answer

Q9) Oxygen is used Show Answer

Q10) Oxygen when used as anasthetic , it is mixed with Show Answer

Q11) Select the process that does not add particulate materials to air.
Show Answer

Q12) The process of respiration Show Answer

Q13) As a result of osmosis, the volume of the solution Show Answer

Q14) We can not use graphite as a lubricant in space because Show Answer

Q15) Substances whose solutions can readily diffuse through parchment membrane are Show Answer

Q16) Tyndall effect in colloidal solutions is due to Show Answer

Q17) Which has least gold number ? Show Answer

Q18) One desires to prepare a positively charged sol of silver iodide. This can be achieved by Show Answer

Q19) Choose the correct statement
Show Answer

Q20) Which of the following statements is not true about the oil-in water type emulsion? Show Answer

Q21) It is advised that we should not light a candle in a closed room with people , because Show Answer

Q22) Which of the following attractive forces exists between different layers of graphite?
Show Answer

Q23) The fuel having lowest calorific value is - Show Answer

Q24) One of the oxidants used with liquid propellants is Show Answer

Q25) Which of the following statements is true about a colloidal system? Show Answer

Q26) Hydrogen molecules differs from chlorine molecule in the following respect Show Answer

Q27) Water possesses a high dielectric constant, therefore Show Answer

Q28) Which of the following terms is not correct for hydrogen? Show Answer

Q29) Graphite conducts electricity because of : Show Answer

Q30) In graphite C atom is in ___state Show Answer

Q31) Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behavior is that graphite. Show Answer

Q32) The extra stability of lyophilic colloids is due to Show Answer

Q33) When dispersed phase is liquid and dispersion medium is gas then the colloidal system is called Show Answer

Q34) The ability of an ion to bring about coagulation of a given colloid depends upon Show Answer

Q35) At the critical micelle concentration (CMC) the surfactant molecules Show Answer

Q36) A colloid always: Show Answer

Q37) Hardy-Schulze rule explain the effect of electrolytes on the coagulation of colloidal solution. According to this rule, coagulation power of cations follows the order Show Answer

Q38) Gold numbers of protective colloids A,B, C and D are 0.50,0.01,0.10 and 0.005, respectively, The correct order of their protective powers is Show Answer

Q39) the disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged, respectively which of the following statements is NOT correct? Show Answer

Q40) It is possible to obtain oxygen from air by fractional distillation because Show Answer

Q41) Hydrogen
1) It is the lightest element
2) It have density more than water
3) Stored in solid state
4) It is called future full Show Answer

Q42) Select the correct statements
1) Hydrogen is a supporter of combustion
2) Hydrogen is a non-combustion gas
3) Oxygen is a supporter of combustion
4) Hydrogen is a combustible gas Show Answer

Q43) The oxide of hydrogen can exist as
1) solid
2) liquid
3) gas
4) plasma
Show Answer

Q44) Which of the following substances given a positively charged sol?
1) Gold
2) A metal sulphide
3) Ferric hydroxide
4) Silver chloride Show Answer

Q45) Which of the following are characteristics of hydrophobic sols?
1) They are highly susceptible to coagulation by addition of electrolytes
2) They have nearly the same surface tension and viscosity as that of dispersion medium
3) Their stability is due to both the electric charge and solvation of the particles
4) Sol particles can be seen under ultramicroscope Show Answer

Q46) Which of the following are true in respect of hydrophilic sols?
1) They are quite stable and are not easily coagulated
2) There is considerable interaction between dispersed phase and dispersion medium (water)
3) The sol particles are hydrated
4) They are vary sensitive to coagulation by a small concentration of electrolytes
Show Answer

Q47) Some uses of water are
1) it is essential for life
2) It is a universal solvent
3) It acts as a catalyst for some process
4) It is used as a coolant in some power stations Show Answer

Q48) Among the following statements , which are correct?
1) The ceaseless zig-zag motion of sol particles is due to the unbalanced bombardment of particles by the molecules of dispersion medium.
2) The intensity of zig-zag motion increases with the increase in the size of the particles.
3) The zig-zag motion of particles becomes intense at high temperature.
3) This motion has stirring effect which does not permit the particles to settle. Show Answer

Q49) Which of the following statements are true about the aqueous solution of soaps and detergents?
1) Their molecules or ions have colloidal dimensions.
2) Their molecules or ions aggregate spontaneously in solution to form particles of colloidal dimensions.
3) In these aggregates of ions, the polar ends are directed towards water and hydrocarbon ends towards the center .
4) The detergent action is due to the absorption of grease/oil stain into the interior of these aggregates ,
Show Answer

Q50) Consider the following statements with regard to diamond and graphite:
1) Diamond and graphite are isotopes of carbon.
2) C-C bond length in diamond is greater than that in graphite.
3) Graphite is less reactive than diamond.
Which of these statement(s) given above is/are correct?
Show Answer

Q51) Consider the following statements:
1) Diamond is known as black lead.
2) Diamond contains carbon.
3) Steel is harder than diamond.
Which of the statement(s) given above is/are correct? Show Answer

Q52) Which of the statements regarding carbon dioxide is/are correct?
1) It is prepared on large scale by the action of water on lime.
2) In the solid form it can be used as a refrigerant.
Select the correct answer using the code given below:
Show Answer

Q53) Which of the following statements are correct?
1) Petroleum is a fossil fuel.
2) Petroleum is formed by the decomposition of remains of marine.
3) The refined form of Petroleum is called crude oil.
4) Petrol and diesel are obtained from a natural resources called petroleum.
Show Answer

Q54) Which of the following statement are correct?
1) Hydrogen has a highest calorific value.
2) Fuel having mass percentage of hydrogen have high calorific value.
3) Any fuel containing oxygen has high calorific value because oxygen it self undergoes combustion.
4) Calorific value of natural gas is more than petroleum gas. Show Answer

Q55) Which of the following statements are true regarding oxygen?
1) It reacts with non-metals to form oxides which are basic in nature.
2) Ozone is isotope of oxygen.
3) It is soluble in alkaline pyrogallol.
4) It is slightly heavier than air .
Select the correct answer using the codes given below: Show Answer

Q56) Which of the following are formed by hydrogen?
1) Covalent hydrides
2) Ionic hydrides
3) Metallic hydrides
Select the answer using the code given below:
Show Answer

Q57) Consider the following statements :
1) Urea readily dissolves in water.
2) Water is polar in nature.
Which of the statement (s) given above is/are correct ?
Show Answer

Q58) Consider the following :
Crude oil is a direct source of
1) Asphalt
2) Paraffin wax
3) Fatty acids
4) Gas oil
Which of the above are correct? Show Answer

Q59) Consider the following statements about petroleum
1) Petroleum is a mixture of several hydrocarbons.
2) It contains oxygen, nitrogen and sulphur containing organic compounds in lower proportions.
3) Petroleum obtained from nature is called crude oil .
Select the correct statement(s): Show Answer

Q60) Solubility of gases in water
1) decrease with rise in temperature.
2) increases with rise in temperature.
3) increase with increases in pressure.
4) decreases with increases in pressure.

Show Answer

Q61) Water can be used as fire extinguisher to put out
1) burning wood
2) burning oil
3) burning cloth
4) burning charcoal
The correct alternatives are Show Answer

Q62) Some statements about heavy water are given below:
1) Heavy water is used as a moderator in nuclear reactors.
2) Heavy water is more associated than ordinary water.
3) Heavy water is more effective solvent than ordinary water.
Which of the above statements are correct?
Show Answer

Q63) Assertion : Carbon monoxide results from incomplete combustion of fuels such as petrol.
Reason : The quantity of oxygen needed for complete combustion is twice of oxygen needed for for incomplete combustion resulting in formation of CO. Show Answer

Q64) Assertion : The percentage of water in exhaled air is more than that in inhaled air.
Reason : During respiration glucose reacts with oxygen to from carbon dioxide and water
Show Answer

Q65) Assertion : Coal gas is a mixture of methane, hydrogen and carbon monoxide.
Reason : It is obtained when coal is burnt in excess of air. Show Answer

Q66) Assertion : Lyophilic colloids are called as reversible sols.
Reason : Lyophilic sols are liquid loving
Show Answer

Q67) Assertion : Colloidal solution is electrically neutral .
Reason : Due to similar nature of the charge carried by the particles, they repel each other and do no combine to form bigger particles.
Show Answer

Q68) Consider the following statements. Hard water is not suitable for
1) drinking
2) washing clothes with soap
3) Use in boilers
4) Irrigation crops
Which of these statements are correct ? Show Answer

Q69) The radioactive isotope of hydrogen is Show Answer

The only antimatter is found is Show Answer

Q71) The adsorption of hydrogen on the metal surface is called Show Answer

Q72) Hydrogen resembles halogens in many respect for which several factor are responsible. Of the
following factors which one is the most important in this respect ? Show Answer

Heavy water is Show Answer

Q74) Which is true statement ? Show Answer

Q75) hellium is preferred to hydrogen in air balloons because it Show Answer

Q76) The hair dye available in the market contains two bottles, one containing dye and other containing hydrogen peroxide. The bottles are mixed before applying the dye. The function of hydrogen peroxidei s Show Answer

Q77) Which of the gases will have the highest rate of diffusion ? Show Answer

Q78) Consider the following statements:
hard water does not give lather with soap because hard water contains:
1. calcium bicarbonate
2. magnesium bicarbonate and magnesium
3. chloride of calcium and magnesium
4. sulphates of calcium and magnesium
Which of these statements are correct?
Show Answer

Q79) Which one of the following pairs is not correctly matched: Show Answer

Q80) Which one of the following pairs is not correctly matched? Show Answer

Q81) Assertion (A) : Synthetic detergents can lather will in hard water.
Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water. Show Answer

Q82) In the ordinary fire extinguisher Carbon dioxide is generated by the reaction of Show Answer

Q83) Most of the explosions in mines Occur due to the mixing of which of the following? Show Answer

Q84) Which is the hardest in the following? Show Answer

Q85) Which is the most abundant element after Oxygen? Show Answer

Q86) Which one of the following is present in the largest amount in terms of percent by mass in the earth's crust ? Show Answer

Q87) Which of the following is the most common element in the Universe? Show Answer

Q88) Which one of the following catalysts is used for hydrogenation of vegetable oils ? Show Answer

Q89) Which one of the following has the highest fuel value ? Show Answer

Q90) Carbon monoxide is a pollutant because it Show Answer

Q91) In which of the following it was agreed that all countries are to put forward their proposed emissions reduction targets for the 2015 agreement as "intended nationally determined contributions" Show Answer

Q92) Hydrocarbon Vision 2025’ is associated with: Show Answer

Q93) Which of the following elements are present in all proteins?
1. Carbon
2. Hydrogen
3. Oxygen
4. Nitrogen
Select the correct answer using the codes given below. Show Answer