Chemistry Questions

Q:

The only non-metal which is liquid at room temperature is

A) Mercury B) Bromine
C) Chlorine D) Gallium
 
Answer & Explanation Answer: B) Bromine

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Q:

What is the process of rust forming on iron called?

A) Rusting B) Crystallisation
C) Shovel D) Spade
 
Answer & Explanation Answer: A) Rusting

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Q:

Find the odd one out.

A) NaCl B) Na2CO3
C) H2O D) He
 
Answer & Explanation Answer: D) He

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Q:

The oceanic crust mainly consists of silica and __________.

A) magnesium B) iron
C) manganese D) sulphur
 
Answer & Explanation Answer: A) magnesium

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Q:

What is the relative molecular mass of water?

A) 8 u B) 9 u
C) 16 u D) 18 u
 
Answer & Explanation Answer: D) 18 u

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Q:

Which one of the following cell organelles mainly functions as storehouse of digestive enzymes?

A) Desmosome B) Ribosome
C) Lysosome D) Vacuoles
 
Answer & Explanation Answer: C) Lysosome

Explanation:

Lysosome is found in nearly all types of eukaryotic cells (cells with a clearly defined nucleus) and is responsible for the digestion of macromolecules, old cell parts, and microorganisms. Each lysosome is surrounded by a membrane that maintains an acidic environment within the interior via a proton pump. Lysosomes contain a wide variety of hydrolytic enzymes (acid hydrolases) that break down macromolecules such as nucleic acids, proteins, and polysaccharides. So, they are known as storehouse of digestive enzymes.

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Q:

__________gives hardness to stainless steel.

A) Zinc B) Carbon
C) Lead D) Tin
 
Answer & Explanation Answer: B) Carbon

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Q:

Name the gas used in preparation of bleaching powder

A) Oxygen B) Hydrogen
C) Nitrogen  D) Chlorine
 
Answer & Explanation Answer: D) Chlorine

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