Mock Test -3 - Class 12 MCQ

# Mock Test -3 - Class 12 MCQ

Test Description

## 30 Questions MCQ Test - Mock Test -3

Mock Test -3 for Class 12 2024 is part of Class 12 preparation. The Mock Test -3 questions and answers have been prepared according to the Class 12 exam syllabus.The Mock Test -3 MCQs are made for Class 12 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Mock Test -3 below.
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Mock Test -3 - Question 1

### If the H+ ion concentration is decreased 100 times in MnO-4 / Mn+2couple then oxidising power of this couple. {Taking concentration of all other ion unity,  RT/F = 0.06]

Detailed Solution for Mock Test -3 - Question 1

5e + MnO-4 + 8H+ → Mn+2 + 4H2O

E' - E = -0.192V

Mock Test -3 - Question 2

### Which of the following is least acidic?

Detailed Solution for Mock Test -3 - Question 2

Carbon with sp3 hybridisation has poor electronegativity

Mock Test -3 - Question 3

### Select correct statement about gas (A) ?

Detailed Solution for Mock Test -3 - Question 3

Gas (A) is SO2 gas and it is of reducing nature

Mock Test -3 - Question 4

First ionisation energy of an electron in the ground state of He-atom is equal to 24 eV/atom. Then calculate the amount of energy required to convert a He-atom in a-particle?

Detailed Solution for Mock Test -3 - Question 4

1st lonisation  energy = 24 eV
2nd lonisation energy  =
Total Energy required = 24 + 54.4 = 78.4 eV

Mock Test -3 - Question 5

Which compound can not show geometrical isomerism?

Detailed Solution for Mock Test -3 - Question 5

Terminal atoms are in perpendicular plane so it will not show G.I

Mock Test -3 - Question 6

Which of the following statement stands True for the following reaction

Detailed Solution for Mock Test -3 - Question 6

CO2(g) → Colourless odorless Acidic in nature

Mock Test -3 - Question 7

The equilibrium constant for the reaction:  at 200 K is 4 x10-4. In presence of catalyst, equilibrium is attained 5 times faster, then value of equilibrium constant at 200 K in presence of catayst will be

Detailed Solution for Mock Test -3 - Question 7

On adding catayst value of equilibrium constant does not change

Mock Test -3 - Question 8

How many Benzenoid isomers are possible by C9H12?

Detailed Solution for Mock Test -3 - Question 8

Mock Test -3 - Question 9

Select correct matching :

Detailed Solution for Mock Test -3 - Question 9

(a) Phosgene gas = COCI2
(b) Hydrolith = CaH2
(c) Epsom salt = MgSO4.7H2O
(d) Bleaching powder = CaOCI2

Mock Test -3 - Question 10

If the closest distance between cation and anion in the unit cell of sodium- chloride is 300 pm then final the distance of body-diagonal in unit cell of sodium-chloride.

Detailed Solution for Mock Test -3 - Question 10

For NaCI (Rock-salt) lattice
r(NA) + rCl = a/2
a/2 = 300
a = 600pm
body diagonal = √3a = √3 * 600 = 1038 pm

Mock Test -3 - Question 11

How many H’s can be replaced by D in following reaction

Detailed Solution for Mock Test -3 - Question 11

Mock Test -3 - Question 12

Which of the following set, povides the crystal field stablization energy equals to-1.2 Δ0 for octahedral complex?

Detailed Solution for Mock Test -3 - Question 12

Mock Test -3 - Question 13

Find the pH of solution which is formed by mixing 50 mL of 0.1 M H2SO4(aq) solution with 100 mL of 0.15 M NH4OH(aq) solution?[Given : Kb(NH4OH) = 10-5]

Detailed Solution for Mock Test -3 - Question 13

H2SO4 + 2NH4OH → (NH4)2SO4 + 2H2O

= 5 + log(2) = 5.3
pH = 14-5.3 = 8.7

Mock Test -3 - Question 14

Detailed Solution for Mock Test -3 - Question 14

Mock Test -3 - Question 15

Which of the following configuration represent increase in anion formation ability

Detailed Solution for Mock Test -3 - Question 15

Mock Test -3 - Question 16

One mole of Ar(g) is compressed isothermally and reversibly at 270 C to half of its original volume, then select the incorrect statement(s)-[In 2=0.7,R=2 cal/mol-K]

Detailed Solution for Mock Test -3 - Question 16

For isothermal compression

Mock Test -3 - Question 17

Detailed Solution for Mock Test -3 - Question 17

Mock Test -3 - Question 18

Observe the pair of structure & select the option in which both the structures does not represents the same compound

Detailed Solution for Mock Test -3 - Question 18

(a) No R-S possible (b)  tetrahedral R-S does not possible
(c) Boh are same (d) positional isomers

Mock Test -3 - Question 19

The freezing point of an aqueous solution containing 0.1 g of K3[Fe(CN)6]    (M.W. = 329 g/mol) in 100 g water    (Kf = 1.86 K-Kg mol-1] will be-

Detailed Solution for Mock Test -3 - Question 19

Mock Test -3 - Question 20

How many fraction can be obtained by fractional distillation of mixture formed by dibromination of n-butane?

Detailed Solution for Mock Test -3 - Question 20

Mock Test -3 - Question 21

In which of the following units are joint by common corner?

Detailed Solution for Mock Test -3 - Question 21

(A)BeF2(s)

Mock Test -3 - Question 22

Select the correct statement-

Detailed Solution for Mock Test -3 - Question 22

Due to presence of H-bonding in NH3 it will have strongest tendency to be adsorbed

Mock Test -3 - Question 23

P is

Detailed Solution for Mock Test -3 - Question 23

SNAr substitution of CI by OMe takes place.

Mock Test -3 - Question 24

Which pair of acids contain monobasic proton donor acid.

Detailed Solution for Mock Test -3 - Question 24

Mock Test -3 - Question 25

then the activation  energy
(KJ/Mol) for A → D reaction is

Detailed Solution for Mock Test -3 - Question 25

Mock Test -3 - Question 26

Final major product is

Detailed Solution for Mock Test -3 - Question 26

Hoffman exhaustive methylation and elimination

Mock Test -3 - Question 27

Observe the following reaction
Dark blue solution
Find the ligand for the product

Detailed Solution for Mock Test -3 - Question 27

(a)
(b)
(c)
(d)

Mock Test -3 - Question 28

N2(g) and H2(g) combines to form N2H2(l) and it is also known that N2H2(l) can be converted to N2H4(g) by mixing it with H2(g). If 20 mL N2(g) and 35 mL H2(g) are mixed togther then volume contraction after completion of reaction is:

Detailed Solution for Mock Test -3 - Question 28

Mock Test -3 - Question 29

Detailed Solution for Mock Test -3 - Question 29

Mock Test -3 - Question 30

Orange soild(s)  paramagnetic gas+green solid+yellow solid
Identify the orange soild & green solid in the above reaction?

Detailed Solution for Mock Test -3 - Question 30

(paramagnetic gas) + Cr2O3( green solid) + 2K2CrO4(yellow solid)

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