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1 English MCQs

Idiom “Get the sack” means?

  • resigned
  • got rid of
  • was demoted from
  • was dismissed from
0 Comments
Correct Answer: D. was dismissed from

Explanation: ...

2 Inorganic Chemistry MCQs

Sulphur dioxide (SO₂) reacts with chlorine (Cl₂) in sunlight to form:

  • Sulphur dioxide
  • Sulphuryl chloride
  • Sulphanyl chloride
  • All of the above
0 Comments
Correct Answer: B. Sulphuryl chloride

Explanation:

Sulphur dioxide (SO₂) is an acidic oxide of sulfur, while chlorine (Cl₂) is ... Read More Details

3 Inorganic Chemistry MCQs

In which compound is the oxidation state of phosphorus +1?

  • H₃PO₃
  • H₃PO₄
  • H₃PO₂
  • H₂P₂O₇
0 Comments
Correct Answer: C. H₃PO₂

Explanation:

Oxidation states help us understand electron distribution in compounds. In phosphorus oxoacids, phosphorus ... Read More Details

4 Chemistry MCQs

The filament of an electric bulb is made of:

  • Copper
  • Aluminum
  • Lead
  • Tungsten
0 Comments
Correct Answer: D. Tungsten

Explanation:

The filament in an electric bulb is the part that produces light when ... Read More Details

5 Organic Chemistry MCQs

Tetraethyl lead is used as:

  • Pain killer
  • Fire extinguisher
  • Mosquito repellent
  • Petrol additive
0 Comments
Correct Answer: D. Petrol additive

Explanation:

Tetraethyl lead (TEL) is an organometallic compound with the chemical formula (C₂H₅)₄Pb. It ... Read More Details

6 Chemistry MCQs

What is the average salinity of seawater?

  • 3%
  • 3.5%
  • 2.5%
  • 2%
0 Comments
Correct Answer: B. 3.5%

Explanation:

Seawater contains a variety of dissolved salts, minerals, and ions, giving it a ... Read More Details

7 Organic Chemistry MCQs

The chemical Ethyl Mercaptan, added to LPG cooking gas to give it a detectable smell, is a compound of:

  • Bromine
  • Fluorine
  • Chlorine
  • Sulphur
0 Comments
Correct Answer: D. Sulphur

Explanation:

Ethyl Mercaptan, also known as ethanethiol (C₂H₅SH), is a chemical compound that contains ... Read More Details

8 Organic Chemistry MCQs

What is Marsh Gas?

  • Nitrogen
  • Ethane
  • Methane
  • Hydrogen
0 Comments
Correct Answer: C. Methane

Explanation:

Marsh gas is the common name for methane (CH₄), which is the simplest ... Read More Details

9 Inorganic Chemistry MCQs

Why is Potassium Permanganate (KMnO₄) used to purify drinking water?

  • It is a sterilising agent
  • It dissolves the impurities of water
  • It is a reducing agent
  • It is an oxidising agent
0 Comments
Correct Answer: D. It is an oxidising agent

Explanation:

Potassium Permanganate (KMnO₄) is a dark purple inorganic compound commonly used in water ... Read More Details

10 Analytical Chemistry MCQs

What is the pH of a 0.001 M solution of Nitric Acid (HNO₃)?

  • 2
  • 3
  • 4
  • 5
0 Comments
Correct Answer: B. 3

Explanation:

Nitric acid (HNO₃) is a strong acid, which means it completely ionizes in ... Read More Details

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