Chemistry Test 197

Result

Chemistry Test 197

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Weekly Quiz Competition

Question 1
4 / -1

Ethers are more volatile than same no. of carbon containing alcohol due to -

A
Ethers are more polar.

B
Absence of H-bonding in ethers.

C
Insolubility of ethers in H₂O.

D
Solubility of ethers in H₂O.

Solution

Ethers are more volatile than same number of carbon containing alcohol due to absence of H-bonding.
Question 2
4 / -1

Select the species which becomes Bent due to lone pair – bond pair repulsion.

A
NO₂

B
I₃¯

C
XeF₄

D
SO₂

Solution
Question 3
4 / -1

Quinaldine red is a useful acid-base indicator which is red in solution of pH greater than 3.5 but colorless below pH = 1.5. Which of the following solution would turn red if a few drops of quinaldine red were added?

(i) 0.1 mol L^–1 HCl

(ii) 0.05 mol L^–1 NH₃

(iii) 0.0001 mol L^–1 CH₃COOH

A
(i) and (ii) only

B
(i) and (iii) only

C
(ii) and (iii) only

D
(ii) only
Question 4
4 / -1

Identify P and Q respectively.

A

B

C

D

Solution
Question 5
4 / -1

Oxidising nature of H₂ is observed on reaction with

A
Cl₂

B
Na

C
Cu₂O

D
RCHO

Solution

(3) Cu₂O + H₂ → 2Cu + H₂O
→ act as reducing agent

(4) RCHO + H₂ → R – CH₂ – OH
→ act as reducing agent
Question 6
4 / -1

A brown-black compound of thallium was found to contain 89.5% Tl and 10.5% oxygen. What is oxidation number of thallium in this compound? [Atomic weight of Tl = 204]

A
zero

B
I

C
II

D
III

Solution
Question 7
4 / -1

Identify R in the following series of reaction.

A

B

C

D
CH₃–C ≡ CH

Solution
Question 8
4 / -1

Select the incorrect match regarding action of H₂O.

A
1

B
2

C
3

D
4

Solution
Question 9
4 / -1

Identify the correct statement :

A
Physical adsorption may change into chemical adsorption with decrease in temperature.

B
Water is adsorbed on anhydrous CaCl₂.

C
At higher concentration of soap in water, it behaves as normal electrolyte.

D
Values of colligative properties for colloidal solutions are less as compared to true solutions.
Question 10
4 / -1

In the mono chlorination of 3-Ethyl pentane, how many total products will be formed?

A
4

B
5

C
6

D
7

Solution