Practice Test

Q1) Which of the following is closed system? Show Answer

Q2) An isolated system is that system in which : Show Answer

Q3) The intensive property among these quantities is Show Answer

Q4) Which is an extensive property of the system ? Show Answer

Q5) The enthalpy change of a reaction does not depend on Show Answer

Q6) If a chemical change is brought about by one or more methods in one or more steps, then the amount of heat absorbed or evolved during the complete change is the same whichever method was followed. This rule is known as : Show Answer

Q7) The favorable conditions for a spontaneous reaction are Show Answer

Q8) If an endothermic reaction is non-spontaneous at freezing point of water and becomes feasible at its boiling point, then Show Answer

Q9) According to second law of thermodynamics a process (reaction ) is spontaneous if during the process Show Answer

Q10) The law formulated by Nernst is Show Answer

Q11) According to third law of thermodynamics, which one of the following quantities for a perfectly crystalline solid is zero at absolute zero. Show Answer

Q12) Compounds with high heat of formation are less stable because Show Answer

Q13) For determining the spontaneity of a process which of the following is considered? Show Answer

Q14) Third law of thermodynamics is used to determine the Show Answer

Q15) In thermodynamics, a process is called reversible when Show Answer

Q16) Aqueous solution of electrolyte on passing electricity undergoes Show Answer

Q17) electrolysis is carried out in a Show Answer

Q18) In salt bridge electrolyte is mixed with Show Answer

Q19) Electrode does not take part in chemical reaction helps only in exchange of electrons Show Answer

Q20) Which of the following statements best explains why a closed balloon filled with helium gas rises in air ? Show Answer

Q21) Equal volumes of all gases under similar conditions of temperature and pressure contain equal number of molecules. This statement was made by Show Answer

Q22) Boyle' s law state that the Show Answer

Q23) Non-reacting gases have a tendency to mix with each other. This phenomenon is known as Show Answer

Q24) A gas which obeys the gas laws is known as Show Answer

Q25) Which of the following expression at constant pressure represent Charle's law? Show Answer

Q26) For an ideal gas number of moles per liter in terms of its pressure P, gas constant R and temperature T is Show Answer

Q27) Rate of diffusion of a gas is Show Answer

Q28) A bottle of ammonia and a bottle of dry hydrogen chloride connected through a long tube are opened simultaneously at both ends, the white ammonium chloride ring first formed will be Show Answer

Q29) Rate of diffusion depends upon Show Answer

Q30) When a gas is compressed keeping temperature constant, it result Show Answer

Q31) Which of the following is a colligative property?
Show Answer

Q32) Which of the following colligative properties can provide molar mass of proteins (or polymers or colloids ) with greatest precision? Show Answer

Q33) When mango is placed in dilute aqueous solution of hydrochloric acids, it Show Answer

Q34) The depression of freezing point for 1M urea, 1M glucose and 1M NaCl are the ratio Show Answer

Q35) During depression of freezing point in a solution the following are in equilibrium Show Answer

Q36) The molecular mass of a solute can not be calculated by one of the following Show Answer

Q37) A solution of 1 molal concentration of a solute will have maximum boiling point elevation when the solvent is Show Answer

Q38) Electrochemical cells are also called
1) electrolytic
2) galvanic cells
3) fuel cells
4) voltaic cells Show Answer

Q39) Salt bridge in voltaic cell
1) it prevents voltage drop
2) allows flow of current by completing the circuit
3) it helps in accumulation of changes
4) salt bridge from a electrolyte
Show Answer

Q40) According to Faraday's first law the amount of substance deposited at electrode when an electric current is passed through electrolyte depends upon
1) amount of current passed
2) dissociation of electrolyte
3) time till which current is passed
4) nature of electrode material Show Answer

Q41) The correct statements amongst the following are
1) gases diffuse at different rates
2) diffusion also takes place in liquids
3) diffusion of liquid and a gas is known as intimate mixing
4) some liquids diffuses at rate equal to gases Show Answer

Q42) At constant temperature , in a given mass of an ideal gas
1) the ration of volume ant temperature always remains constant.
2) volume always remains constant .
3) pressure always remains constant .
4) the product of pressure and volume always remains constant . Show Answer

Q43) Which of the following are colligative properties?
1) Depression in freezing point
2) Elevation of boiling point
3) Osmotic pressure
4) Modification of refreactive index
Show Answer

Q44) In the depression of freezing point experiment, it is found that the
1) vapour pressure of the solution is less than the at of pure solvent
2) vapour pressure of the solution is more than the at of pure solvent
3) only solute molecules solidify at the freezing point
4) only solvent molecules solidify at the freezing point Show Answer

Q45) A binary liquid solution is prepared by mixing n-heptane and ethanol. Which of the following statements is incorrect regarding the behavior of the solution?
1) The solution is non-ideal, showing -ve deviation from Raoult's Law .
2) The solution is non-ideal, showing +ve deviation from Raoults's Law.
3) n-heptane shows +ve deviation while ethanol shows -ve deviation from Raoult's Law.
4) The solution formed is an ideal solution. Show Answer

Q46) Consider the following relationship for emf of a electrochemical cell:
1) emf of cell = (Oxidation potential of anode) -(Reduction potential of cathode)
2) emf of cell = (Oxidation potential of anode)+(Reduction potential of cathode)
3) emf of cell = (Reduction potential of anode) +(Reduction potential of cathode)
4) emf of cell = (Oxidation potential of anode)- (Oxidation potential of cathode)
Which of the above relations are correct? Show Answer

Q47) Which of the following are true in case of an ideal gas?
1) It cannot be converted into a liquid
2) There is no interaction between the molecules
3) All molecules of the gas move with same speed
4) At a given temperature, PV is proportional to the amount of the gas. Show Answer

Q48) Which of the following statements are incorrect?
1) The presence of reacting species in a covered beaker is an example s of open system.
2) There is an exchange of energy as well as matter between the system and the surrounding in a closed system.
3) The presence of reactants in a closed vessel made up of copper is an example of a closed system.
4) The presence of reactants in a thermos flask or any other closed insulated vessel is an example of a closed system. Show Answer

Q49) Which of the following statements are correct?
1) Work is a state function
2) Temperature is a state function.
3) Change in the state is completely defined when the initial and final states are specified
4) Enthalpy is extensive property Show Answer

Q50) Identify the incorrect statements regarding a spontaneous process :
1) Lowering of energy in the process is the only criterion for spontaneity
2) For a spontaneous process in an isolated system, the change in entropy is positive.
3) Endothermic process are never spontaneous .
4) Exothermic process are always spontaneous.
Show Answer

Q51) Which of the following are not sate functions?
1) q+W
2) Q
3) w
4) H-TS
Show Answer

Q52) Assertion : Potassium bromide (KBr) is a strong electrolyte .
Reason : Potassium bromide completely dissociates in water Show Answer

Q53) Assertion : Electricity causes chemical change in electrolytic cell.
Reason : Displacement reaction occurs in dry cell. Show Answer

Q54) Assertion : Galvanic cell convert chemical energy into electrical energy.
Reason : Redox reaction are those in which oxidation takes place at anode and reduction at cathode. Show Answer

Q55) Assertion : Ideal gas equation is valid at low pressure and high temperature.
Reason : Molecular interactions are negligible under this condition. Show Answer

Q56) During the electrolysis of fused sodium chloride which reaction will take place at anode ? Show Answer

Q57) The life span of Daniell cell may be increased by Show Answer

Q58) Assertion (A) Zinc is used for galavanisation of irons.
Reason (R) Zinc is an atmospheric element. Show Answer

Q59) Which of the following statements about the commonly used automobile battery are true ?
1) It is usually a lead acid battery.
2) It has six cells with a potential of 2V each.
3) Its cells work as galvanic cells while discharging power.
4) Its cells work as electrolytic cells while recharging.
Select the correct using the codes given below Show Answer

Q60) Assertion (A) Addition of water to an aqueous solution of HCL decreases the pH.
Reason (R) Addition of water suppersses the ionisation if HCL. Show Answer

Q61) Consider the following statements
1) Banking soda is used in fire extinguisher.
2) Quicklime is used in the manufacture of glass.
3) Gypsum is used in the manufacture of plaster of paris
Which of the statements is/are correct ? Show Answer

Q62) Which one of the following is involved for the desalination of sea water ? Show Answer

Q63) Scuba divers are at risk due to high concentration of dissolved gases while breathing air at high
pressure under water. The tanks used by scuba divers are filled with Show Answer

Q64) In which mode of expression the concentration of the solution remains independent of temperature ? Show Answer

Q65) Consider the following properties.
1) Boiling point
2) Lowering of vapour pressure
3) Osmotic pressure
Which of these is/are colligative properties ? Show Answer

Q66) The pH value of the solution obtained by complete neurtralisation of hydrochloric and sodium
hydroxide solution will be Show Answer

Q67) Which property is not shown by colloidal sols ? Show Answer

Q68)
Bleeding is stopped by the application of ferric chloride. This is because Show Answer

Q69) Gelatin is often used as an ingredient in the manufacture of ice-cream. The reason for this is Show Answer

Q70) Cloud burst due to Show Answer

Q71) Tanning of leather is Show Answer

Q72) Silver iodide is used for producing artificial rain because AgI Show Answer

Q73) The blue colour of the water of the sea is due to Show Answer

Q74) Consider the following statements
1) Vitamin B cannot be stored in the body.
2) Deficiency of vitamin B, causes beri-beri
The correct statement(s) is/are Show Answer

Q75) Which element maintain membrane potential ? Show Answer

Q76) Which element maintain membrane potential ? Show Answer

Q77) Aspartame is an artificial sweetener sold in the market. It consists of amino acids and provides calories like other amino acids. Yet, it is used as a low calorie sweetening agent in food items. What is the basis of this use ? Show Answer

Q78) Which of the following is used as an antioxidant in food ? Show Answer

Q79) Which one of the following is the correct sequence in the increasing order of molecular weights of the hydrocarbons ? Show Answer

Q80) Consider the following chemicals
1) Benzene
2) Carbon tetrachloride
3) Sodium carbonate
4) Trichloroethylene
Which of the above is/are used as dry cleaning chemical ? Show Answer

Q81) Assertion (A) The main constituent of the liquified petroleum gas in methane.
Reason (R) Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.
Show Answer

Q82) pH of which solution is 12.2 ? Show Answer

Q83) Consider the following statements
1) Alcohol is no-polar solvent.
2) Ionic compounds are insoluble in non-polar solvent.
3) Ionic compounds do not conduct electricity in solid state.
Which of the statement given above are correct ? Show Answer

Q84) Consider the following statements. Coke is one of the materials of the charge added to blast furnance for the production of steel/iron. Its function is to
1) act as a reducing agent.
2) remove silica associated with the iron ore.
3) function as fuel, to supply heat.
4) act as an oxidizing agent
Of these statements
Show Answer

Q85) Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively ? Show Answer

Q86) Helium is preferred to hydrogen in air ballons because it Show Answer

Q87) Which of the following acid is uitilised in the photography ? Show Answer

Q88) Consider the following statements
1) Limestone, chalk and marble are different form of calcium carbonate.
2) When pH of rain water is less than 5.6, it is called acid rain
3) Human body works with in the pH range of 7.0 to 7.8.
Which of the statements given above are correct ? Show Answer

Q89) Consider the following statements
1) A real gas can be approximated as an ideal gas when it is highly dilute
2) Only monoatomic gases can be approximated as ideal gases
3) An ideal gas does not undergo phase transition.
Which of the above statements are correct ? Show Answer

Q90) Assertion (A) All liquids are conductors of electricity.
2) Reason (R) Under the condition of low pressure and high voltage, liquids can be made conducting Show Answer

Q91) Consider the following statements
1) Strength of certain acid and bases can be explained on the basis of hydrogen bonding.
2) Alcohol and amines are soluble in water due to hydrogen bonding.
Which of the statement given above is/are correct ? Show Answer

Q92) Azeotropic mixture are Show Answer

Q93) Fog is an example of Show Answer

Q94) Consider the solubility of silver chloride in 0.1 M solution of
1) Potassium chloride
2) potassium nitrate
3) potassium bromide
The correct order indicating a decrease in the solubility will be Show Answer

Q95) Which one of the following will not function as buffer solution ? Show Answer

Q96) In the haber's process of sythesis of NH3 Show Answer

Q97) A catalyst poison is essentially Show Answer

Q98) The catalyst used in the maufacture of hydrogen by Bosch process is Show Answer

Q99) Entropy change of a system and its surroundings in equilibrium Show Answer

Q100) Assertion (A) Lyophobic colloids get coagulated in the presence of strong electrolytes.
Reason (R) Electrolytes help the coagulation of lyophobic colloids by removing solvent sheaths around them. Show Answer

Q101) The source of electrical energy on the Appolo moon flights was Show Answer

Q102) Which is used in storage batteries ? Show Answer

Q103) Which gas is obtained from plastic ? Show Answer

Q104) The element found maximum in the soil-layer is- Show Answer

Q105) Which one of the following was used as a chemical weapon in the first world war ? Show Answer

Q106) Mustard gas is used Show Answer

Q107) Which of the following gas mixture finds application in gas welding? Show Answer

Q108) In a diesel engine the fuel used is : Show Answer

Q109) Cooking gas is mainly Show Answer

Q110) Bio-gas mainly consists of Show Answer