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 Chemistry Questions

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Q:

Activated Charcoal is used to remove colouring matter from pure substances by_______

A) Bleaching B) Oxidation
C) Adsorption D) Reduction
 
Answer & Explanation Answer: C) Adsorption

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4 1716
Q:

............. elements have the largest atoms

A) F B) O
C) H D) Li
 
Answer & Explanation Answer: D) Li

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Q:

Which one of the following is an ohmic conductor?

A) Germanium B) Silicon
C) Carbon D) Silver
 
Answer & Explanation Answer: D) Silver

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2 1715
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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1 1715
Q:

What are Aldehydes ?

A) Mild oxidising agents B) Strong oxidising agents
C) Strong reducing agents D) Mild reducing agents
 
Answer & Explanation Answer: C) Strong reducing agents

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2 1714
Q:

If we take a small amount of washing soda and add approximately 1 mL of dilute hydrochloric acid to it, what will we observe?

A) only neutralisation reaction occurs, no gas is released B) white-coloured precipitate is formed
C) CO2 gas comes out with brisk effervescence D) H2 gas comes out with pop sound
 
Answer & Explanation Answer: C) CO2 gas comes out with brisk effervescence

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3 1712
Q:

The volume of 10 g of gas X is 5.6 litre at NTP. What is the molecular weight of X?

A) 40 B) 60
C) 50 D) 20
 
Answer & Explanation Answer: A) 40

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0 1708
Q:

Chemical formula for sulphurous acid is:

A) H2SO4 B) H2SO3
C) H3SO3 D) H3SO4
 
Answer & Explanation Answer: B) H2SO3

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