Chemistry Test 165

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Chemistry Test 165

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Weekly Quiz Competition

Question 1
4 / -1

The equation of state for a gas is P(V – nb) = nRT, where b & R are constant. If the pressure and temperature are such that V_m = 11b, then what is the compressibility factor of gas in this condition :

A
10/9

B
9/11

C
11/10

D
10/11
Question 2
4 / -1

Which of the following complex displays optical activity?

A

B

C

D

Solution

It contains no symmetry element.
Question 3
4 / -1

Which of the following statement is not correct ?

A
Brownian movement stablises sols.

B
In a reaction, catalyst may change physically.

C
An emulsion can be broken both by heating as well as freezing.

D
On prolong dialysis, colloids become stable.

Solution

(A) Brownian movement is one of the reason for stability of sols.

(B) Catalyst can undergo qualitative/physical change but cannot undergo any quantitative change.

(C) Both heating & freezing cause de–emulsification.

(D) Excessive dialysis causes co–agulation in colloids making them unstable.
Question 4
4 / -1

The compound formed by the reaction between borazine (B₃N₃H₆) and HCl is :

A
B₃N₃H₇Cl

B
B₃N₃H₈Cl₂

C
B₃N₃H₉Cl₃

D
B₃N₃H₁₀Cl₄

Solution

B₃N₃H₆ + 3HCl → B₃N₃H₉Cl₃
Question 5
4 / -1

Which of the following is NOT a property of borax?

A
It is soluble in water

B
It is crystallized from aqueous solution as a decahydrated salt

C
It’s anion undergoes hydrolysis in water

D
On heating it forms sodium boride

Solution

Na₂B₄O₇ 2NaBO₂ + B₂O₃
Question 6
4 / -1

Provide the product of the following crossed aldol reaction?

A

B

C

D
Question 7
4 / -1

Which of the following reactions are correctly matched with the product?

A

B

C

D

Solution
Question 8
4 / -1

Which of the following labelled can be removed by base in the above reaction?

A
a

B
b

C
c

D
d

Solution

Conjugate base formed after removal of H (b) is resonance stabilized by both keto and alkene group.
Question 9
4 / -1

P (Major )is

A

B

C

D

Solution
Question 10
4 / -1

Among the following correct statement is :

A
Number of product in given reaction is one.

B
Reaction is anti-addition

C
Number of products in given reaction is four.

D
Number of products in given reaction is two.

Solution