Chemistry Questions

Q:

Rutherford's alpha-scattering experiment related to the size of the

A) nucleus B) atom
C) electron D) neutron
 
Answer & Explanation Answer: A) nucleus

Explanation:
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Q:

Ozone hole refers to

A) Decrease in the thickness of ozone layer in Stratosphere B) Increase in thickness of ozone layer
C) Decrease in the ozone layer in Troposphere D) Hole in the ozone layer
 
Answer & Explanation Answer: A) Decrease in the thickness of ozone layer in Stratosphere

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Q:

Dimond is

A) an element B) a compound
C) a mixture D) a liquid
 
Answer & Explanation Answer: A) an element

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Q:

The molecular mass of sulphuric acid is 98. If 49 g of the acid is dissolved in water to make one litre of solution, what will be the strength of the acid?

A) Two normal B) One normal
C) 0.5 normal D) Four normal
 
Answer & Explanation Answer: B) One normal

Explanation:

Normality is a way of expressing concentration of a solution and can be calculated by the formula-

Normality (N) = No. of gram equivalent of solute/ volume of solution (in litre)

Gram equivalent weight of H2 SO4 = Molecular weight/ No. of Hydrogen atom = 98/2 = 49 gm

No. of gram equivalent in 49 gm of H2 SO4 = 1

So, Normality in 1 litre of solution = 1/1 = 1 N

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Q:

Which one of the following laws explain the formation of carbon monoxide and carbon dioxide from carbon and oxygen.......

A) Law of conservation of mass B) Law of multiple proportion
C) Law of reciprocal proportions D) Law of definite proportions
 
Answer & Explanation Answer: B) Law of multiple proportion

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Q:

In atomic reactors,graphite is used as

A) lubricant B) fuel
C) linear of the ractor D) moderator
 
Answer & Explanation Answer: D) moderator

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Q:

Is steel a compound?

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

Steel is not a compound or element. Steel is an alloy of iron and carbon and other elements and hence it is a mixture. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons.

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Q:

Which of the following is not a monosaccharide? 

A) Fructose B) Glucose
C) Galactose D) Sucrose
 
Answer & Explanation Answer: D) Sucrose

Explanation:

Sucrose is not a monosaccharide.

 

Monosaccharides are simple carbohydrates molecules that cannot be broken down into smaller molecules of other carbohydrates.

 

Glucose, galactose and fructose are examples of Monosaccharides.

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