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 Chemistry Questions

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Q:

Which is known as carbolic acid?

A) Phenol B) Ethanol
C) Acetic acid D) Oxalic acid
 
Answer & Explanation Answer: A) Phenol

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Q:

Which of the following gases is known as "Laughing Gas"?

A) Nitrous oxide B) Nitrogen peroxide
C) Nitrogen D) Nitric oxide
 
Answer & Explanation Answer: A) Nitrous oxide

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Q:

Magnetite is an ore/mineral of

A) Beryllium B) Chromium
C) Iron D) Lead
 
Answer & Explanation Answer: C) Iron

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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:

Bronze is an alloy of

A) Copper & tin B) Copper & zinc
C) Copper & iron D) Iron & nickel
 
Answer & Explanation Answer: A) Copper & tin

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Q:

Which of the following are highly compressible?

A) Solid B) Liquid
C) Gas D) Solid and Liquid
 
Answer & Explanation Answer: C) Gas

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Q:

‘Plum  Pudding  Model’  for  an  atom  was proposed by

A) Antoine Lavoisier B) Robert Boyle
C) Ernest Rutherford D) J. J. Thomson
 
Answer & Explanation Answer: D) J. J. Thomson

Explanation:

The   first   model   of   atom   was proposed   by   J.   J.   Thomson   in 1898.According  to  this  model,  the positive   charge   of   the   atom   is uniformly   distributed   throughout the  volume  of  the  atom  and  the negatively  charged  electrons  are embedded  in  it  like  seeds  in  a watermelon.    This    model    was picturesquely  called  plum  pudding model of the atom

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Q:

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

A) Aluminium B) Silicon
C) Chlorine D) Magnesium
 
Answer & Explanation Answer: C) Chlorine

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