Chemistry Test 194

Result

Chemistry Test 194

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Weekly Quiz Competition

Question 1
4 / -1

Read the following statements carefully and choose the correct answer
(i) Expansion of a gas in vacuum is called free expansion.

(ii) Work is done during free expansion of an ideal gas whether the process is reversible or irreversible

(iii) No work is done during free expansion of an ideal gas whether the process is reversible or irreversible

(iv) No work is done during free expansion of an ideal gas when the process is reversible

A
Only statement (iii) is correct

B
Statements (i) and (iii) are correct

C
Statements (ii) and (iv) are correct

D
Statements (i) and (iv) are correct
Question 2
4 / -1

Which one of the following arrangements represents the correct order of solubility of sparingly soluble salts respectively?

A

B

C

D

Solution
Question 3
4 / -1

A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number?

A
S

B
H

C
Cl

D
C

Solution
Question 4
4 / -1

When zeolite (hydrated sodium aluminium silicate) is treated with hard water the sodium ions are exchanged with

A

B

C

D

Solution
Question 5
4 / -1

The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na⁺will be

A
– 2.55 eV

B
– 5.1 eV

C
– 10.2 eV

D
+ 2.55 eV

Solution
Question 6
4 / -1

Example of a three-dimensional silicate is:

A
Zeolites

B
Ultramarines

C
Feldspars

D
Beryls

Solution
Question 7
4 / -1

Chlorine in vinyl chloride is less reactive because

A
sp²hybridised carbon has more acidic character than sp³ hybridised carbon

B
C - Cl bond develops partial double bond character

C
of resonance

D
All are correct

Solution
Question 8
4 / -1

A

B

C

D

Solution
Question 9
4 / -1

A dental disease characterised by mottling of teeth is due to presence of a certain chemical element in drinking water. Which is that element?

A
Boron

B
Chlorine

C
Fluorine

D
Mercury

Solution

The excess of fluorine in water causes fluorosis. The symptoms of fluorosis are mottling of teeth (yellowish streaks) and abnormal bones liable to fracture etc. It is an example of endemic disease.
Question 10
4 / -1

What type of crystal defect is indicated in the diagram below?

A
Interstitial defect

B
Schottky defect

C
Frenkel defect

D
Frenkel & Schottky defects