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1 Inorganic Chemistry MCQs

Which electronic configuration corresponds to an element of Group IIIA?

  • 1s² 2s² 2p³
  • 1s² 2s² 2p⁶ 3s² 3p¹
  • 1s² 2s² 2p⁴
  • 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹
0 Comments
Correct Answer: B. 1s² 2s² 2p⁶ 3s² 3p¹

Explanation:

Elements of Group IIIA (Group 13) in the periodic table include boron (B), ... Read More Details

2 Inorganic Chemistry MCQs

In the network of silica (SiO₂), each silicon atom is surrounded by __________ oxygen atoms.

  • 4
  • 2
  • 1
  • 6
0 Comments
Correct Answer: A. 4

Explanation:

Silica (SiO₂), also called silicon dioxide, is a major constituent of the Earth’s ... Read More Details

3 Inorganic Chemistry MCQs

Orthoboric acid is 2.6% soluble in water at 40°C and __________ at 107°C.

  • 26%
  • 27%
  • 37%
  • Less than 2.6%
0 Comments
Correct Answer: C. 37%

Explanation:

Orthoboric acid (H₃BO₃), commonly known as boric acid, is a weak, crystalline compound ... Read More Details

4 Inorganic Chemistry MCQs

Aluminium is used __________ because it reacts with oxygen and nitrogen.

  • As a nitrometer
  • To remove air bubbles from molten metal
  • To make alloys
  • As an insulator
0 Comments
Correct Answer: B. To remove air bubbles from molten metal

Explanation:

Aluminium (Al) is a highly reactive metal that forms a protective oxide layer ... Read More Details

5 Organic Chemistry MCQs

Silicon differs from silica by a group of ?

  • CH₃
  • OH
  • OCH₃
  • O₂
0 Comments
Correct Answer: B. OH

Explanation:

Silicon (Si) and silica (SiO₂) are chemically related but structurally distinct substances. The ... Read More Details

6 Inorganic Chemistry MCQs

Boron is a non-metal, while the other elements of Group IIIA (Group 13) are metals. This is because ?

  • It has a small atomic size
  • It has a high nuclear charge
  • It forms molecular addition compounds
  • All of the above
0 Comments
Correct Answer: D. All of the above

Explanation:

Boron (B) is the first element of Group 13 (IIIA) in the periodic ... Read More Details

7 Inorganic Chemistry MCQs

The coloured glassy mass formed in the borax bead test is due to the formation of ?

  • Metal borate
  • Metal metaborate
  • Metal boride
  • Metal silicate
0 Comments
Correct Answer: B. Metal metaborate

Explanation:

The borax bead test is a traditional qualitative analysis method used in inorganic ... Read More Details

8 Physical Chemistry MCQs

If the temperature of gallium arsenide (GaAs) is increased, its electrical conductivity will ?

  • Decrease
  • Increase
  • Remain constant
  • First decrease then increase
0 Comments
Correct Answer: B. Increase

Explanation:

Gallium arsenide (GaAs) is a semiconductor compound formed from gallium (Ga) and arsenic ... Read More Details

9 Inorganic Chemistry MCQs

Which of the following compounds decomposes to produce litharge (PbO)?

  • Pb₂O
  • Pb₃O₄
  • PbO₂
  • All of the above
0 Comments
Correct Answer: D. All of the above

Explanation:

Litharge (PbO) is the monoxide of lead, a yellow to reddish crystalline compound ... Read More Details

10 Inorganic Chemistry MCQs

Which of the following compounds is known as metasilicic acid?

  • H₂SnO₃
  • H₂SiO₃
  • H₃AsO₄
  • H₃SbO₄
0 Comments
Correct Answer: B. H₂SiO₃

Explanation:

Metasilicic acid (H₂SiO₃) is one of the hydrated forms of silicic acid, a ... Read More Details

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