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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:

Uraninite is an ore/mineral of _______.

A) Zinc B) Uranium
C) Titanium D) Aluminium
 
Answer & Explanation Answer: B) Uranium

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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:

_____ is the most ductile metal.

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

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Q:

What is the percentage of methane in biogas?

A) 90% B) 80%
C) 60% D) 75%
 
Answer & Explanation Answer: D) 75%

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Q:

Which of the following is a mixture?

A) Water B) Air
C) Carbon dioxide D) Oxygen
 
Answer & Explanation Answer: B) Air

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Q:

Which among the following is not a characteristic of oxidation reaction?

A) It involves addition of hydrogen B) It involves addition of oxygen
C) It involves loss of electrons D) 4) It involves addition of electronegative element
 
Answer & Explanation Answer: A) It involves addition of hydrogen

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Q:

Warming Ammonium chloride with sodium hydrochloride in a test tube is an example of

A) Open system B) Closed system
C) Isobaric system D) Isothermal system
 
Answer & Explanation Answer: A) Open system

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