NEET Chemistry Chapter Wise Mock Test – Equilibrium

NEET Chemistry Chapter Wise Mock Test – Equilibrium

Question 1:
CaC0_3⇔ CaO+ C0₂ reaction in a lime goes to completion because
(a) CaO does not react to C0₂to give CaC0₂
(b) backward reaction is very low
(c) C0₂ formed escapes out
(d) None of the above

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Question 6:
A reaction is, A + B -—> C + D; initially we start with equal concentrations of A and B. At equilibrium, we find the moles of C is two times of A What is the equilibrium constant of the reaction?
(a)2
(b)4
(c)1/2
(d)1/4

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Question 10:
An amount of solid NH₄HS is placed in a flask already containing ammonia gas at a certain temperature and 0.50 atm pressure. Ammonium hydrogen sulphide decomposes to yield NH₃and gases in the flask. When the decomposition reaction reaches at equilibrium, the total pressure in the flask rises to 0.84 atm. The equilibrium constant for NH₄HS decomposition at this temperature is
(a)0.11
(b) 0.22
(c) 0.33
(d) 0.44

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Direction (Q. Nos. 26-27) 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 26:
The Lewis acids among the following are
(a)BF₃
(b) AICI₃
(c) BeCI₂
(d) H₂0

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Question 32:
Given pH of a solution Ais 3 and it is mixed with another solution B having pH 2. If both mixed then
resultant pH of the solution will be
(a) 3.2
(b) 1.9
(c) 3.4
(d) 3.5

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Question 38:
In which of the following, dissociation of NH₄OH will be minimum?
(a) NaOH
(b) H₂0
(c)NH₄Cl
(d) NaCl

Question 39:
The aqueous solution of FeCI₃ is acidic due to
(a) acidic impurities
(b) ionisation
(c) hydrolysis
(d) dissociation

Question 40:
An aqueous solution of sodium carbonate is alkaline because sodium carbonate is a salt of
(a)weak acid and weak base
(b)strong acid and weak base
(c)weak acid and strong base
(d)strong acid and strong base

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Question 49:
The solubility of Agl in Nal solution is less than that in pure water because
(a) Agl forms complex with Nal
(b) of common ion effect
(c) solubility product of Agl is less
(d) the temperature of the solution decreases

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Question 51:
An aqueous solution of 1 M NaCI and 1 M HCI is
(a)not a buffer but pH < 7
(b)not a buffer but pH > 7
(c)a buffer with pH < 7
(d)a buffer with pH > 7

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Question 60:
Which of the foliowing statements is correct for the spontaneous adsorption of a gas?
(a)ΔS is negative and therefore,ΔH should be highly positive
(b)ΔS is negative and therefore, ΔH should be highly negative
(c)ΔS is positive and therefore, ΔH should be negative
(d)ΔS is positive and therefore, ΔH should also be highly positive

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Question 64:
Equimolar solutions of the following substances were
prepared separately. Which one of these will record the highest pH value?
(a) BaCI₂
(b) AICI₃
(c) LiCI
(d) BeCI₂

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Question 73:
Ammonium ion is
(a) neither an acid nor a base
(b) both an acid and a base
(c) a conjugate acid
(d) a conjugate base

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<a

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Question 78:
100 mL of HCI +35 mL of NaOH, colour of methyl orange in this solution will be
(a)red
(b)yellow
(c)cannot be predicted
(d)methyl orange is not a suitable indicator

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