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Question 1: The atmospheric pollution is generally measured in the units of
A) mass percentage
B) volume percentage
C) volume fraction
D) ppm
Explanation: D) ppm
Question 2: Temperature dependent term among the following is –
A) Molality
B) Molarity
C) Mole fraction
D) Weight percentage
Explanation: Molarity
Question 3: The law which indicates the relationship between solubility of a gas in liquid and pressure is
A) Raoult’s law
B) Henry’s law
C) Lowering of vapour pressure
D) Van’t Hoff law
Explanation: Henry’s law
Question 4: Partial pressure of a solution component is directly proportional to its mole fraction. This is known as
A) Henry’s law
B) Raoult’s law
C) Distribution law
D) Ostwald’s dilution law
Explanation: Raoult’s law
Question 5: Which of the following solutions shows positive deviation from Raoult’s law?
A) Acetone + Aniline
B) Acetone + Ethanol
C) Water + Nitric acid
D) Chloroform + Benzene
Explanation: Acetone + Ethanol
Question 6: The system that forms maximum boiling azeotrope is
A) Acetone-chloroform
B) ethanol-acetone
C) n-hexane-n-heptane
D) carbon disulphide-acetone
Explanation: Acetone-chloroform
Question 7: A plant cell shrinks when it is kept in a
A) hypotonic solution
B) hypertonic solution
C) isotonic solution
D) pure water
Explanation: hypertonic solution
Question 8: The osmotic pressure of a solution can be increased by
A) increasing the volume
B) increasing the number of solute molecules
C) decreasing the temperature
D) removing semipermeable membrane
Explanation: increasing the number of solute molecules
Question 9: Sprinkling of salt helps in clearing the snow-covered roads in hills. The phenomenon involved in the process is
A) lowering in vapour pressure of snow
B) depression in freezing point of snow
C) melting of ice due to increase in temperature by putting salt
D) increase in freezing point of snow
Explanation: depression in freezing point of snow
Question 10: The Van’t Hoff factor [i] for a dilute aqueous solution of the strong electrolyte barium hydroxide is?
A) 0
B) 1
C) 2
D) 3
Explanation: 3
Question 11: The charge required for the reduction of 1 mol of MnO4– to MnO2 is
A) 1 F
B) 3 F
C) 5 F
D) 6 F
Explanation: 3 F
Question 12: If limiting molar conductivity of Ca2+ and Cl– are 119.0 and 76.3 S cm2 mol-1, then the value of limiting molar conductivity of CaCl2 will be
A) 195.3 S cm2 mol-1
B) 271.6 S cm2 mol-1
C) 43.3 S cm2 mol-1
D) 314.3 S cm2 mol-1
Explanation: 271.6 S cm2 mol-1
Question 13: The emf of the cell:
Ni / Ni2+ (1.0 M) // Au3+ (1.0 M) / Au (E° = -0.25 V for Ni2+/Ni; E° = 1.5 V for Au3+/Au) is
A) 1.25 V
B) -1.25 V
C) 1.75 V
D) 2.0 V
Explanation: 1.75 V
Question 14: In a dry cell, which of the following is the electrolyte?-
A) Potassium hydroxide
B) Sulphuric acid
C) Ammonium chloride
D) Manganese dioxide
Explanation: Ammonium chloride
Question 15: Which of the following statements about a lead storage cell (or a lead-acid battery) is false?
A) It is a primary cell
B) The cathode is made up of lead (IV) oxide
C) The anode is made up of lead
D) The electrolyte used is an aqueous solution of Sulphuric acid
Explanation: It is a primary cell
Question 16: Which of the following observations is incorrect about the order of a reaction?
A) Order of a reaction is always a whole number
B) The stoichiometric coefficient of the reactants doesn’t affect the order
C) Order of reaction is the sum of power to express the rate of reaction to the concentration terms of the reactants.
D) Order can only be assessed experimentally
Explanation: Order of a reaction is always a whole number
Question 17: In the reaction 2A + B → A2B, if the concentration of A is doubled and that of B is halved, then the rate of the reaction will
A) decrease 2 times
B) increase 4 times
C) increase 2 times
D) remain the same
Explanation: increase 2 times
Question 18: when the rate of the reaction is equal to the rate constant, the order of the reaction is
A) zero order
B) first order
C) second order
D) third order
Explanation: zero order
Question 19: A substance ‘A’ decomposes by a first-order reaction starting initially with [A] = 2.00M and after 200min, [A] becomes 0.15M. For this reaction t1/2 is
A) 53.72 min
B) 50.49 min
C) 48.45 min
D) 46.45 min
Explanation: 53.72 min
Question 20: A catalyst alters, which of the following in a chemical reaction?
A) Entropy
B) Enthalpy
C) Internal energy
D) Activation energy
Explanation: Activation energy
Report Card
Total Questions Attempted: 0
Correct Answers: 0
Wrong Answers: 0
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