Chemistry Test 201

Result

Chemistry Test 201

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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

Select the incorrect statement based on the following half-reaction -

A
Copper reacts with dil. H₂SO₄ forming H₂ and SO₂

B
Copper reacts with con. H₂SO₄ forming SO₂

C
Zinc reacts with con. H₂SO₄ forming SO₂

D
Zinc reacts with dil. H₂SO₄ forming H₂
Question 3
4 / -1

In which of the following complexes, change in colour is not observed on heating ?

A
CuSO₄.5H₂O

B
[Ti(H₂O)₆]Cl₃

C
CoCl₂.6H₂O

D
[Zn(H₂O)₆]Cl₂

Solution

Due to d¹⁰ configuration Zn²⁺ does not impart any colour on heating
Question 4
4 / -1

Find the total number of Aldol products in given reaction.

A
Five

B
Four

C
Six

D
Eight

Solution
Question 5
4 / -1

The reaction : 2NO₂(g) ⇌ N₂O₄(g), has ΔG⁰_298K = -6kJ mol^-1. If in the reaction mixture the partial pressure of NO₂ is 0.4 atm and partial pressure of N₂O₄ is 0.2 atm than -

A
The reaction will proceed forward to attain equilibrium.

B
The reaction will proceed backward to attain equilibrium.

C
The reaction is at equilibrium.

D
Direction of reaction can not be predicted.

Solution
Question 6
4 / -1

Select a incorrect match :

A
During photographic film fixation process the complex formed is [Ag(S₂O₃)₂]^3–

B
Complex formed in Mond's process is [Ni(CO)₄]

C
Complex formed in removal of hardness of water is Na₂ EDTA.

D
Complex used to inhibit growth of tumor is cis-platin.

Solution

Na⁺ + EDTA^4– → Na₄ EDTA
Question 7
4 / -1

Which statement is not true :

A
Protonation increases electrophilic nature of carbonyl group.

B
CF₃SO₃^– is better leaving group than CH₃SO₃^–

C
Benzyl carbonium ion is stabilized by resonance.

D

Solution
Question 8
4 / -1

The standard heat of combustion of carbon(s), sulphur(s) and carbon disulphide(l) are – 390, – 290 and – 1100 kJ/mol respectively. The standard heat of formation of carbon disulphide (l) is -

A
– 130 kJ mol^–1

B
+ 130 kJ mol^–1

C
– 420 kJ mol^–1

D
+ 420 kJ mol^–1

Solution

C(s) + 2S(s) → CS₂(l)

ΔfH° = -390 - (290) × 2 - (-1100)

= + 130 kJ mol^-1
Question 9
4 / -1

of Mn, Fe and Co is +1.57, + 0.77 and + 1.97 respectively then this irregularity is due to

A
d⁵ configuration of Fe²⁺

B
d⁵ configuration of Mn³⁺

C
d⁵ configuration of Co³⁺

D
d⁵ configuration of Fe³⁺

Solution

Mn → [Ar] 3d⁵ 4s² ; Mn³⁺ → d⁴

Fe → [Ar] 3d⁶ 4s² ; Fe²⁺ → d⁶, Fe³⁺→ d⁵

Co → [Ar] 3d⁷ 4s² ; Co³⁺ → d⁶
Question 10
4 / -1

Which of the following ketones has the largest equilibrium constant for addition of water?

A

B

C

D

Solution

Cyclopropone has largest equilibrium constant.