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Q:

Oxide of which of the following will turn red litmus blue?

A) Magnesium B) Phosphorus
C) Sulphur D) Carbon
 
Answer & Explanation Answer: A) Magnesium

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Q:

_____ is the most ductile metal.

A) Ph B) C
C) Au D) Ag
 
Answer & Explanation Answer: C) Au

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Q:

Which of the following elements has the lowest melting point?

A) Sodium B) Tin
C) Radon D) Radium
 
Answer & Explanation Answer: C) Radon

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Q:

Which of the following statements is INCORRECT?

A) Solids have definite volume  B) solids are rigid 
C) Solids have indefinite shape  D) Solids are almost incompressible
 
Answer & Explanation Answer: C) Solids have indefinite shape 

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Q:

Which of the following gases is produced due to incomplete combustion of fuel?

A) Carbon Dioxide B) Carbon Monoxide
C) Methane D) Ethane
 
Answer & Explanation Answer: B) Carbon Monoxide

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Q:

Atomic number of which of the following elements is greater than that of Neon?

A) Oxygen B) Magnesium
C) Nitrogen D) Boron
 
Answer & Explanation Answer: B) Magnesium

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Q:

Who formulated ‘the atomic theory’ of a matter?

A) Avogadro B) Dalton
C) Newton D) Pascal  
 
Answer & Explanation Answer: B) Dalton

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Q:

The depletion in Ozone layer is caused by ___________ .

A) Nitrous oxide B) Carbon dioxide
C) Chlorofluorocarbons D) Methane
 
Answer & Explanation Answer: C) Chlorofluorocarbons

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