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1 Inorganic Chemistry MCQs

Phosphorus pentoxide (P₂O₅) is a hygroscopic powder that sublimes at __________.

  • 260°C
  • 360°C
  • 630°C
  • 620°C
0 Comments
Correct Answer: B. 360°C

Explanation:

Phosphorus pentoxide (P₂O₅) is one of the most important oxides of phosphorus. It ... Read More Details

2 Inorganic Chemistry MCQs

Phosphoric acid is a weak acid, and its basicity is __________.

  • 1
  • 3
  • 0
  • 2
0 Comments
Correct Answer: B. 3

Explanation:

Phosphoric acid (H₃PO₄) is an oxyacid of phosphorus and is classified as a ... Read More Details

3 Inorganic Chemistry MCQs

All the elements in Group VIA (Group 16) of the periodic table are __________ in nature.

  • Hygroscopic
  • Metals
  • Polymeric
  • Non-metals
0 Comments
Correct Answer: C. Polymeric

Explanation:

Group 16 elements, known as chalcogens, include oxygen (O), sulfur (S), selenium (Se), ... Read More Details

4 Inorganic Chemistry MCQs

Which allotropic form of phosphorus is the most stable?

  • White phosphorus
  • Black phosphorus
  • Red phosphorus
  • Violet phosphorus
0 Comments
Correct Answer: B. Black phosphorus

Explanation:

Phosphorus exists in several allotropic forms, including white, red, violet, and black phosphorus, ... Read More Details

5 Inorganic Chemistry MCQs

What is the chemical composition of Cinnabar?

  • ZnS
  • PbS
  • HgS
  • FeS
0 Comments
Correct Answer: C. HgS

Explanation:

Cinnabar is a naturally occurring mineral with the chemical formula HgS (mercury(II) sulfide). ... Read More Details

6 Inorganic Chemistry MCQs

Oxygen and sulfur resemble each other in all respects except ____________?

  • Electronic configuration of valence shell electrons
  • Show allotropy
  • Polymeric nature
  • Show same oxidation states
0 Comments
Correct Answer: D. Show same oxidation states

Explanation:

Oxygen (O) and sulfur (S) are both elements of Group 16 (the oxygen ... Read More Details

7 Inorganic Chemistry MCQs

Arsenic oxides are removed by passing them through ?

  • Ferric hydroxide
  • Sodium hydroxide
  • Calcium hydroxide
  • Aluminium hydroxide
0 Comments
Correct Answer: A. Ferric hydroxide

Explanation:

Arsenic oxides, such as arsenious oxide (As₂O₃) and arsenic pentoxide (As₂O₅), are toxic ... Read More Details

8 Organic Chemistry MCQs

When sulphuric acid (H₂SO₄) is treated with ethanol (C₂H₅OH), sulphuric acid acts as:

  • An acid
  • A dehydrating agent
  • An oxidizing agent
  • A sulphonating agent
0 Comments
Correct Answer: B. A dehydrating agent

Explanation:

When ethanol (C₂H₅OH) is treated with concentrated sulphuric acid (H₂SO₄), the acid does ... Read More Details

9 Inorganic Chemistry MCQs

Which one of the following elements has a melting point below 0°C?

  • Nitrogen (N)
  • Phosphorus (P)
  • Carbon (C)
  • Bismuth (Bi)
0 Comments
Correct Answer: A. Nitrogen (N)

Explanation:

The melting point of an element is the temperature at which it changes ... Read More Details

10 Inorganic Chemistry MCQs

The most electronegative element among the following is:

  • Antimony (Sb)
  • Nitrogen (N)
  • Arsenic (As)
  • Phosphorus (P)
0 Comments
Correct Answer: B. Nitrogen (N)

Explanation:

Electronegativity is a measure of the tendency of an atom to attract a ... Read More Details

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