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Class 12 Exam  >  Class 12 Tests  >  Mock Test- 4 - Class 12 MCQ

Mock Test- 4 - Class 12 MCQ


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30 Questions MCQ Test - Mock Test- 4

Mock Test- 4 for Class 12 2024 is part of Class 12 preparation. The Mock Test- 4 questions and answers have been prepared according to the Class 12 exam syllabus.The Mock Test- 4 MCQs are made for Class 12 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Mock Test- 4 below.
Solutions of Mock Test- 4 questions in English are available as part of our course for Class 12 & Mock Test- 4 solutions in Hindi for Class 12 course. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free. Attempt Mock Test- 4 | 30 questions in 45 minutes | Mock test for Class 12 preparation | Free important questions MCQ to study for Class 12 Exam | Download free PDF with solutions
Mock Test- 4 - Question 1
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The hydrolyis of ester is slow in the beginning and become faster after some time, this is due to :    

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Theory based

Mock Test- 4 - Question 2
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Mock Test- 4 - Question 3
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Which of the following compound gives only oxy acid as a final roduct by the hydrolysis at room temperature?    

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Mock Test- 4 - Question 4
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For an ideal solution containing two volatile miscible liquids A and B following graph is given:

The vapour pressure of pure B (in mm of Hg) is :
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From given graph 

Mock Test- 4 - Question 5
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A : MeCH2COOH        B : MeCH(Br)COOH

Mock Test- 4 - Question 6
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Which of the following gas is responsible for ozone hole/ozone layer depletion?    
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CI(g) obtained from Chloro Fluoro Carbon (CFC) is responsible for ozone hole/ozone layer depletion

Mock Test- 4 - Question 7
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The change in Gibbs free energy of the cell in which following reaction takes place

 
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Mock Test- 4 - Question 8
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Which of the following given positive Fehling test?
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Aliphatic aldehydes gives Fehling’s test +ve    

Mock Test- 4 - Question 9
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Which of the following represents incorrect order of Vander waal force?
Detailed Solution for Mock Test- 4 - Question 9

 

 

 

Neopentane < Isopentane < n-pentane  

Mock Test- 4 - Question 10
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For the reaction A+B=  Product, Rate law is given as rate = K[A]1/2 [B]2. The molecularity of the reaction is:    
Detailed Solution for Mock Test- 4 - Question 10

There is no meaning of molecularity for complex reaction.

Mock Test- 4 - Question 11
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If white bauxite is treated with concentrated solution of sodium hydroxide then SiO2 present in bauxite will :    
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White Bauxite conatins SiO2

Mock Test- 4 - Question 12
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The concentration of Ni2+ ions in a NiS solution is 2x10-6 M. If Ksp of NiS is 1.4 x 10-14 then which of the following will not cause the precipitation of NiS.    
Detailed Solution for Mock Test- 4 - Question 12

For precipitation min S2- required 

having less than 7x10-9 will not precipitate NiS.

Mock Test- 4 - Question 13
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Mock Test- 4 - Question 14
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Tetrametaphosphoric acid and Tetrapolyphosphoric acid have same.
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Tetrametaphosphoric acid = H4P4O12

Tetrapolyphosphoric acid = H6P4O13

Mock Test- 4 - Question 15
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A compound forms HCP structure. The total number of tetrahedral voids present in 2 mol of it will be-    
Detailed Solution for Mock Test- 4 - Question 15

No. of tetrahedral void per unit cell =2
So, no. of tetrahedral void in 2 mol of it = 4NA

Mock Test- 4 - Question 16
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Which of the following compounds will not produce a compound with offensive smell when treated with CHCI3/KOH?
Detailed Solution for Mock Test- 4 - Question 16

B’ foes not given this reaction

Carbene well attack on O-

Mock Test- 4 - Question 17
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Total number of geometrical isomers of diamminebis(glycinato)platinum(IV) chloride is:    
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Mock Test- 4 - Question 18
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At 450 K. Calculate the mass of H2O present (in gm) in a 10 litre closed vessel which contains only CuSO4.5H2O crystal initally.
Given :     CuSO4 + H2O → CuSO4(s) + 5H2O(g)

Kp = 3.2 * 10-4atm5

(Take R = 0.08 atm litre/mol K)
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Mock Test- 4 - Question 19
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Product (X) is
 
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Mock Test- 4 - Question 20
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Mr A has two correct informations about a particular orbital of hydrogen atom
 The orbital has two radial nodes. Then orbital is identified as :
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Mock Test- 4 - Question 21
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Conversiopn can be carried out by:    
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SBH won’t reduce C=C in this compound Raney Ni/H2 will reduce benzene ring also N2H4/H2O2 won’t reduce C=O

Mock Test- 4 - Question 22
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Which of the following option satifies salt (X):
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Mock Test- 4 - Question 23
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An open end manometer consists of 0.75 moles of X(g) taken in a container of volume 24.63 lit. at 300 K. The level of mercury in the open tube is found to be 14 cm lower. The height difference manometer is heated to 450 K will be:    
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Mock Test- 4 - Question 24
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Which of the following is a good method for reduction of CO group as methioned below.
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In acidic medium the given cyclic ether is not stable while in basic medium six membered cyclic ether is stable. LiAIH4 will convert ketone into 20 alc.]

Mock Test- 4 - Question 25
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Which of the following is not used in Methylene blue test ?
   
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Mock Test- 4 - Question 26
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In the preparation of iron from Haematite (Fe2O3) by the reduction with carbon.

How much 80% pure iron may be produced from 120 kg of 90% pure Fe2O3?
Detailed Solution for Mock Test- 4 - Question 26

Actual mole of product: (maximum mole of reactant) x 

Mass of Fe produced = 94.5 kg

Mock Test- 4 - Question 27
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End product (B) of above reaction is
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Mock Test- 4 - Question 28
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Observe th efollowing reaction:
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Mock Test- 4 - Question 29
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Monomer of Nylon - 6:

 
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Monomer → Caprolactum

Mock Test- 4 - Question 30
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In the cyanide process for extraction of silver and gold, the cyanide act as:    
Detailed Solution for Mock Test- 4 - Question 30

It is a fact

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