NEET Chemistry Chapter Wise Mock Test – Solutions

NEET Chemistry Chapter Wise Mock Test – Solutions

Question 1:

Question 2:

Question 3:

Question 4:

Question 5:

Question 6:
The aqueous solution of glucose is 10% in strength. The volume in which 1 g mole of it is dissolved will be
(a) 8 L
(b) 9 L
(c) 0.9 L
(d) 1.8 L

Question 7:
What mass of solution of 0.50 molal glucose solution is required to obtain 0.15 mole glucose?
(a) 327 g
(b) 300 g
(c) 273 g
(d) None of these

Question 8:

Question 9:
Two liquids X and Y form an ideal solution. The mixture has a vapour pressure of 400 mm at 300 K, when mixed in the molar ratio of 1 : 1 and a vapour pressure of 350 mm, when mixed in the molar ratio of 1 : 2 at the same temperature. The vapour pressures of the two pure liquids X and / respectively are
(a) 250 mm, 550 mm
(b) 350 mm, 450 mm.
(c) 350 mm, 700 mm
(d) 550 mm, 250 mm

Question 10:
The vapour pressure of a pure liquid A is 40 mm Hg at 310 K. The vapour pressure of this liquid in a solution with liquid B is 32 mm Hg. Mole fraction of A in the solution, if it obeys Raouit’s law, is
(a) 0.8
(b) 0.5
(c) 0.2
(d) 0.4

Question 11:

Question 12:

Question 13:

Question 14:
H₂s a toxic gas with rotten egg like smell, is used for the qualitative analysis. If the solubility of H₂S in water at STP is 0.195 m, calculate the Henry’s law constant.
(a) 152 bar
(b) 100 bar
(c) 200 bar
(d) 282 bar

Question 15:
Moles of K₂S0₄ to be dissolved in 12 moles of water to lower its vapour pressure by 10 mm Hg at a temperature at which vapour pressure of pure water is 50 mm is
(a) 3 mol
(b) 2 mol
(c) 1 mol
(d) 0.5 mol

Question 16:

Question 17:

Question 18:
Azeotropic mixture of HCI and water has
(a) 48% HCI
(b) 22.2% HCI
(c) 36% HCI
(d) 20.2% HCI

Question 19:

Question 20:

Question 21:

Question 22:

Question 23:

Question 24:

Question 25:

Question 26:
The molal freezing point constant for water is 1.86°C per mol therefore, the freezing point of 0.1 M NaCI solution in water is expected to be
(a) -1.86°C
(b) -0.186°C
(c)+0.372°C
(d) – 0.372°C

Question 27:

Question 28:

Question 28:

Question 30:

Question 31:

Question 32:
Human blood gives rise to an osmotic pressure of approximately 7.65 atm at body temperature 37°C. Hence, molarity of an intravenous glucose solution be to have the same osmotic pressure as blood is (a)0.30 M
(b) 0.20 M
(c) 0.10 M
(d) 0.50 M

Question 33:
An unripe mango placed in a concentrated salt solution to prepare pickle, shrivels, because
(a) it gains water due to osmosis
(b) it loses water due to reverse osmosis
(c) it gains water due to reverse osmosis
(d) it loses water due to osmosis

Question 34:

Question 35:

Question 36:

Question 37:
Benzoic acid is dissolved in benzene, van’t Hoff factor will be
(a) 1
(b) 0.5
(c) 1.5
(d) 2

Direction (Q. No. 38) In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the codes.
Codes
(a) 1,2 and 3 are correct
(b) 1 and 2 are correct
(c) 2 and 4 are correct
(d) 1 and 3 are correct

Question 38:
In the depression of freezing point experiment, it is found that the
(a)Vapour pressure of the solution is less than that of pure solvent.
(b) only solute molecules solidify at the freezing point.
(c)only solvent molecules solidify at the freezing point.
(d)vapour pressure of the solution is more than that of pure Solvent.

Question 39:

Question 40:

Question 41:

Direction(Q.N0.42-45) Each of these questions contains two statements : Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.
(a) Assertion is true, Reason is true; Reason is the correct explanation for Assertion
(b) Assertion is true, Reason is true; Reason is not the correct explanation for Assertion
(c) Assertion is true, Reason is false
(d) Assertion is false, Reason is true

Question 42:
Assertion Azeotropic mixtures are formed only by non-ideal solutions and they may have boiling points either greater than both the components or less than both the components.
Reason The composition of the vapour phase is same as that of the liquid phase of an azeotropic mixture.

Question 43:
Assertion The boiling point of 0.1 M urea solution is less than that of 0.1 M KCI solution.
Reason Elevation of boiling point is directly proportional to the number of species present in the solution.

Question 44:
Assertion The water pouch of instant cold pack for treating athletic injuries breaks when squeezed and NH4NO3 dissolves lowering the temperature.
Reason Addition of non-volatile solute into solvent result in depression of freezing point of solvent.

Question 45:
Assertion If red blood cells were removed from the body and placed in pure water, pressure inside the cells increases.
Reason The concentration of salt content in the cells increases.

Question 46:

Question 47:

Question 48:

Question 49:
Of the following 1.10 m aqueous solutions which one will exhibit the largest freezing point depression?
(a) KCI
(b) C₆H₁₂0₆
(c) AI₂(S0₄)₃
(d) K₂S0₄

Question 50:

Question 51:

Question 52:
Which one of the following statements is false?
(a) Raoult’s law states that the vapour pressure of a component over a solution is proportional to its mole fraction
(b) The osmotic pressure (π)of a solution is given by the equation π = MRT, where, M is the molarity of the solution
(c) The correct order of osmotic pressure for 0.01 M aqueous solution of each compound is
BaCI2 > KCI > CH₃COOH > sucrose
(d)Two sucrose solutions of same molality prepared in different solvents will have the same freezing point depression

Question 53:
The volume of 10 N and 4 N HGI required to make 1 L of 7 N HCI are
(a) 0.50 L of 10 N HCI and 0.50 L of 4 N HCI
(b) 0.60 L of 10 N HCI and 0.40 L of 4 N HCI
(c) 0.80 L of 10 N HCI and 0.20 L of 4 N HCI
(d) 0.75 L of 10 N HCI and 0.25 L of 4 N HCI

Question 54:
Mole fraction of the solute in a 1.00 molal aqueous solutionis
(a) 9.0177
(b) 0.0344
(c) 1.7700
(d) 0.0177

Question 55:
The van’t Hoff factor, i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively
(a) less than one and less than one
(b) greater than one and less than one
(c) greater than one and greater than one
(d) less than one and greater than one

Question 56:
Molarity of a given orthophosphoric acid solution is 3 M. Its normality is
(a) 9 N
(b) 0.3 N
(c) 3 N
(d) 1 N

Question 57:
138 g of ethyl alcohol is mixed with 72 g of water. The ratio of mole fraction of alcohol to water is
(a) 3 :4
(b) 1 : 2
(c) 1:4
(d) 1 : 1

Question 58:

Question 59:

Question 59:

Question 60:

Question 61:
If ethanol dissolves in water then which of the following would happen?
(a) Absorption of heat and contraction of volume
(b) Liberation of heat and contraction of volume
(c) Absorption of heat and increase in volume
(d) Liberation of heat and increase in volume

Answers:

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