Chemistry Questions

Q:

The most active ingredient in bleaching powder is

A) Iodine B) Calcium hypochlorite
C) Nitric acid D) Ammonium sulphate
 
Answer & Explanation Answer: B) Calcium hypochlorite

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Q:

Dried fruit like raisins when soaked in water, bulge and get filled with water. What is the scientific reason that explains this daily life event?

 

A) Osmosis B) Active Transport
C) Diffusion D) Passive Transport
 
Answer & Explanation Answer: A) Osmosis

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Q:

Which of the following is NOT correctly matched?

A) Sandstone - conglomerate   B) Limestone - Marble  
C) Granite - Basalt   D) Gabbro - Serpentine  
 
Answer & Explanation Answer: A) Sandstone - conglomerate  

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Q:

Choose the one which is different or odd from the following.

A) Aluminium B) Iron
C) Copper D) Brass
 
Answer & Explanation Answer: D) Brass

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Q:

15% of an alloy was silver. If in a quantity of alloy there was 51 g of silver, what was the quantity of the other elements in the alloy?

A) 204 g B) 340 g
C) 300 g D) 289 g
 
Answer & Explanation Answer: D) 289 g

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Q:

Which of the following metals is found in free state?

A) Sodium B) Gold
C) Potassium D) Calcium
 
Answer & Explanation Answer: B) Gold

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Q:

Common salt (NaCl) is made up of

A) a weak acid and a weak base B) a strong acid and a weak base
C) a weak acid and a strong base D) a strong acid and a strong base
 
Answer & Explanation Answer: D) a strong acid and a strong base

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Q:

Which of the following gases are responsible for the greenhouse gas effect on Earth?

A) Water Vapour and Carbon dioxide B) Carbon dioxide and Nitrogen
C) Oxygen and Methane D) Ozone and Methane
 
Answer & Explanation Answer: A) Water Vapour and Carbon dioxide

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