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Mock Test -3 - Class 12 MCQ

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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

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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]

A.
increases by 192 mV
B.
decreases by 192 mV
C.
increases by 96 mV
D.
decreases by 96 mV

Detailed Solution for Mock Test -3 - Question 1

5e + MnO^-₄ + 8H⁺ → Mn⁺² + 4H₂O

E' - E = -0.192V

Mock Test -3 - Question 2

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Which of the following is least acidic?

A.
HC ≡ CH
B.
HC ≡ N
C.
H₃C - CH₃
D.
H₂C ≡ CH₂

Detailed Solution for Mock Test -3 - Question 2

Carbon with sp³ hybridisation has poor electronegativity

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Mock Test -3 - Question 3

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Select correct statement about gas (A) ?

A.
It has reducing nature
B.
It is CO₂
C.
It is SO₃
D.
It does not react with KMnO₄/H⁺

Detailed Solution for Mock Test -3 - Question 3

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

Mock Test -3 - Question 4

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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?

A.
59 eV
B.
96 eV
C.
78.4 eV
D.
24 eV

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

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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

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Which of the following statement stands True for the following reaction

A.
On thermal decomposition it give paramagnetic gas as one of the product
B.
Product Y is a gas which is acidic in nature
C.
X is water soluble
D.
X on reaction with aqua regia form water soluble compound

Detailed Solution for Mock Test -3 - Question 6

CO2(g) → Colourless odorless Acidic in nature

Mock Test -3 - Question 7

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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

A.
2x10^-3
B.
20x10^-3
C.
4x10^-4
D.
4x10^-3

Detailed Solution for Mock Test -3 - Question 7

On adding catayst value of equilibrium constant does not change

Mock Test -3 - Question 8

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How many Benzenoid isomers are possible by C₉H₁₂?

A.
6
B.
7
C.
8
D.
9

Detailed Solution for Mock Test -3 - Question 8

Mock Test -3 - Question 9

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Select correct matching :

A.
Phosgene gas = CaOCI₂
B.
Hydrolith = BaH₂
C.
Epsom salt = MgSO₄.7H₂O
D.
Bleaching powder = CaCI₂

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

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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.

A.
519 pm
B.
1038
C.
259.5 pm
D.
300 pm

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

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

A.
8
B.
7
C.
6
D.
5

Detailed Solution for Mock Test -3 - Question 11

Mock Test -3 - Question 12

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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

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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 : K_b(NH₄OH) = 10^-5]

A.
9
B.
5
C.
8.7
D.
5.3

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

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Detailed Solution for Mock Test -3 - Question 14

Mock Test -3 - Question 15

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Which of the following configuration represent increase in anion formation ability

A.
np⁶ to (n+1)s¹
B.
ns¹ to ns²
C.
np⁴to np⁵
D.
np⁵ to np⁶

Detailed Solution for Mock Test -3 - Question 15

Mock Test -3 - Question 16

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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]

A.
q = -180.6 cal
B.
ΔU = 0
C.
ΔH = 0
D.
W = 420cal

Detailed Solution for Mock Test -3 - Question 16

For isothermal compression

Mock Test -3 - Question 17

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Detailed Solution for Mock Test -3 - Question 17

Mock Test -3 - Question 18

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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

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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 (K_f = 1.86 K-Kg mol^-1] will be-

A.
-0.023⁰C
B.
-0.057⁰C
C.
-0.0057⁰C
D.
-0.012⁰C

Detailed Solution for Mock Test -3 - Question 19

Mock Test -3 - Question 20

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

A.
7
B.
6
C.
5
D.
8

Detailed Solution for Mock Test -3 - Question 20

Mock Test -3 - Question 21

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

A.
BeF₂(s)
B.
BeCI₂(s)
C.
BeBr₂(s)
D.
BeI₂(s)

Detailed Solution for Mock Test -3 - Question 21

(A)BeF₂(s)

Mock Test -3 - Question 22

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Select the correct statement-

A.
Among He(g),CI₂(g), NH₃(g), N₂(g) gases, NH₃(g) has strongest tendency to be adsorbed on surface of activated charcoal.
B.
Gel is a colloid in which solid is dispersed in liquid
C.
Lyophilic colloids can be protected by layer of lyophobic colloids
D.
As₂S₃ sol will move towards cathode in presence of electric medium.

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

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P is

Detailed Solution for Mock Test -3 - Question 23

S_NAr substitution of CI by OMe takes place.

Mock Test -3 - Question 24

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Which pair of acids contain monobasic proton donor acid.

A.
H₃PO₂, H₃PO₃
B.
H₃PO₃, H₃PO₂
C.
HCIO₃, H₃BO₃
D.
H₃PO₂, HCIO₄

Detailed Solution for Mock Test -3 - Question 24

Mock Test -3 - Question 25

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

A.
100
B.
43.44
C.
150
D.
140

Detailed Solution for Mock Test -3 - Question 25

Mock Test -3 - Question 26

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Final major product is

Detailed Solution for Mock Test -3 - Question 26

Hoffman exhaustive methylation and elimination

Mock Test -3 - Question 27

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

A.
H₂O (aqua)
B.
CN^-(Cyanido)
C.
NH₃ (ammine)
D.
CI^- (Chlorido)

Detailed Solution for Mock Test -3 - Question 27

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

Mock Test -3 - Question 28

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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:

A.
20 mL
B.
0 mL
C.
40 mL
D.
35 mL

Detailed Solution for Mock Test -3 - Question 28

Mock Test -3 - Question 29

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Detailed Solution for Mock Test -3 - Question 29

Mock Test -3 - Question 30

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

A.
(NH₄)₂Cr₂O₇,K₂CrO₄
B.
K₂Cr₂O₇, Cr₂O₃
C.
(NH₄)₂ Cr₃O₇, Cr₂O₃
D.
K₂Cr₂O₇, K₂CrO₄

Detailed Solution for Mock Test -3 - Question 30

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

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