1099+ Important Chemistry MCQ Questions Answers

Q:

The Chemical formula of Urea is

A) (NH4)2CO2	B) (NH2)CO
C) (NH4)2CO	D) (NH2)2CO

Answer & Explanation Answer: D) (NH2)2CO

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Q:

The Chemical formula of Methanol is _____.

A) C2H5OH	B) CH3(OH)2
C) CH3OH	D) CH4OH

Answer & Explanation Answer: C) CH3OH

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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:

There are ............ metalloids in the modern periodic table.

A) 5	B) 4
C) 7	D) 6

Answer & Explanation Answer: D) 6

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Q:

....... is displaced when zinc is added to the solution of copper sulphate

A) Copper	B) Hydrogen
C) Zinc	D) Sulphate

Answer & Explanation Answer: A) Copper

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Q:

Chemical formula for sulphurous acid is:

A) H2SO4	B) H2SO3
C) H3SO3	D) H3SO4

Answer & Explanation Answer: B) H2SO3

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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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Q:

The Chemical formula of Ammonium dichromate is _____.

A) (NHF4)2Cr2O7	B) (NH4)CrO3
C) (NH4)Cr2O3	D) (NH4)2Cr2O3

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