Chemistry Test 104

Result

Chemistry Test 104

/

Score
-

Rank

Time Taken: -

Question 1/10
4 / -1

Incorrect statement among the following is :

Correct

Wrong

Skipped
A
Ethoxymethyl chloride reacts with Nucleophiles 10 times faster than 1–Chlorobutane

Correct

Wrong

Skipped
B
Ethoxymethyl chloride follows S_N1 mechanism when reacts with Nucleophiles

Correct

Wrong

Skipped
C
2-Phenylthioethyl chloride reacts with water 600 times as fast as 1-chloropropane

Correct

Wrong

Skipped
D
Higher rate of 2-Phenylthioethyl chloride is because the neighbouring group participation by phenyl ring.

Verify mobile number to view the solution

Solutions

Neighboring group participation by a sulphide involved.
Question 2/10
4 / -1

Which of the following ionic species has maximum ionisation energy?

Correct

Wrong

Skipped
A
O^–

Correct

Wrong

Skipped
B
S^–

Correct

Wrong

Skipped
C
Se^–

Correct

Wrong

Skipped
D
Te^–

Verify mobile number to view the solution

Solutions

ΔH_eg (M) = IE(M^¬)

Since sulphar has most –ve electron gain enthalpy hence S^– will have highest IE.
Question 3/10
4 / -1

Out of the following, which is the correct match for radial probability of finding the electron of 2s orbital?

Correct

Wrong

Skipped
A
A–H, B–He⁺, C-Li²⁺

Correct

Wrong

Skipped
B
A–He⁺, B–H, C–Li²⁺

Correct

Wrong

Skipped
C
A–Li²⁺, B–He⁺, C–H

Correct

Wrong

Skipped
D
Can't say

Verify mobile number to view the solution

Solutions

r = r₀ n²/Z

As Z increases, r₀ decreases

Hence upon increasing Z, nuclear distance of node decreases.
Question 4/10
4 / -1

Correct acidic strength order of the given carbonyl compound is ?

Correct

Wrong

Skipped
A
IV > I > II > III

Correct

Wrong

Skipped
B
IV > II > III > I

Correct

Wrong

Skipped
C
IV > III > II > I

Correct

Wrong

Skipped
D
IV > I > III > II

Verify mobile number to view the solution

Solutions

Process of active methylene group acidic strength and the side chain should be e^– withdrawing.
Question 5/10
4 / -1

Which of the following is correct:

Correct

Wrong

Skipped
A
S₃O₉ → Contains no S–S linkage

Correct

Wrong

Skipped
B
HNO₄ → contains no O–O linkage

Correct

Wrong

Skipped
C
(HPO₃)₃ → contains P–P linkage

Correct

Wrong

Skipped
D
S₂O₈^2– → contains S–S linkage

Verify mobile number to view the solution

Solutions

S₃O₉ has no

S – S linkage
Question 6/10
4 / -1

At 373 K, a gaseous reaction A(g) → 2B(g) + C(g) is found to be of first order. Starting with pure A, the total pressure at the end of 10 min was 176 mm Hg and after a long time when A was completely dissociated, it was 270 mm Hg. Then pressure of A at the end of 10 minutes was :

Correct

Wrong

Skipped
A
94 mm

Correct

Wrong

Skipped
B
47 mm

Correct

Wrong

Skipped
C
43 mm

Correct

Wrong

Skipped
D
90 mm

Verify mobile number to view the solution

Solutions

   A → 2B + C

t = 0 a 0 0

t = 10   a – x 2x x

t → ∞ 0 2a a

a + 2x ∝ 176

3a ∝ 270

a ∝ 90

∴   2x ∝ 86

x ∝ 43

a – x ∝ 90 – 43

a – x ∝ 47
Question 7/10
4 / -1

Incorrectly matched among the following is :

Correct

Wrong

Skipped
A
A

Correct

Wrong

Skipped
B
B

Correct

Wrong

Skipped
C
C

Correct

Wrong

Skipped
D
D

Verify mobile number to view the solution

Solutions

Yield of 4-hydroxypentan-2-one is low because aldol and diacetone alcohol are also formed.
Question 8/10
4 / -1

If Hund's rule is violated, then which among the following will become diamagnetic from paramagnetic

Correct

Wrong

Skipped
A
C₂

Correct

Wrong

Skipped
B
CN^–

Correct

Wrong

Skipped
C
N₂^–2

Correct

Wrong

Skipped
D
BN

Verify mobile number to view the solution

Solutions

If hunds rule is followed

N₂^–2 : σ1s² σ*1s² σ2s² σ*2s² σ2π_z² π2p²_x π2p_y² π*2p_x¹ π*2p_y¹

If Hunds rule is not followed

N₂^–2 : σ1s² σ*1s² σ2s² σ*2s² σ2p_z² π2p²_x π2p_y² π*2p_x²
Question 9/10
4 / -1

Which one is false in the following statements?

Correct

Wrong

Skipped
A
A catalyst is specific in its action

Correct

Wrong

Skipped
B
A very small amount of the catalyst alters the rate of a reaction

Correct

Wrong

Skipped
C
The number of free vacancies on the surface of the catalyst increases on sub-division

Correct

Wrong

Skipped
D
Nickel is used as a catalyst in the manufacture of ammonia

Verify mobile number to view the solution

Solutions

Fe acts as catalyst and Mo acts as promoter in Haber's process.
Question 10/10
4 / -1

In which of the following reaction 1° amine is not obtained as a major product.

Correct

Wrong

Skipped
A
(1)

Correct

Wrong

Skipped
B
(2)

Correct

Wrong

Skipped
C
(3)

Correct

Wrong

Skipped
D
(4)

Verify mobile number to view the solution

Solutions

Question 1/10

Ethoxymethyl chloride reacts with Nucleophiles 10 times faster than 1–Chlorobutane

Ethoxymethyl chloride follows SN1 mechanism when reacts with Nucleophiles

2-Phenylthioethyl chloride reacts with water 600 times as fast as 1-chloropropane

Higher rate of 2-Phenylthioethyl chloride is because the neighbouring group participation by phenyl ring.

Question 2/10

O–

S–

Se–

Te–

Question 3/10

A–H, B–He+, C-Li2+

A–He+, B–H, C–Li2+

A–Li2+, B–He+, C–H

Can't say

Question 4/10

IV > I > II > III

IV > II > III > I

IV > III > II > I

IV > I > III > II

Question 5/10

S3O9 → Contains no S–S linkage

HNO4 → contains no O–O linkage

(HPO3)3 → contains P–P linkage

S2O82– → contains S–S linkage

Question 6/10

94 mm

47 mm

43 mm

90 mm

Question 7/10

A

B

C

D

Question 8/10

C2

CN–

N2–2

BN

Question 9/10

A catalyst is specific in its action

A very small amount of the catalyst alters the rate of a reaction

The number of free vacancies on the surface of the catalyst increases on sub-division

Nickel is used as a catalyst in the manufacture of ammonia

Question 10/10

(1)

(2)

(3)

(4)

Ethoxymethyl chloride follows S_N1 mechanism when reacts with Nucleophiles

O^–

S^–

Se^–

Te^–

A–H, B–He⁺, C-Li²⁺

A–He⁺, B–H, C–Li²⁺

A–Li²⁺, B–He⁺, C–H

S₃O₉ → Contains no S–S linkage

HNO₄ → contains no O–O linkage

(HPO₃)₃ → contains P–P linkage

S₂O₈^2– → contains S–S linkage

C₂

CN^–

N₂^–2