Chemistry Questions

Q:

Is Nitrogen an Inert gas?

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

Explanation:

Nitrogen is found as a diatomic molecule (N2) in nature. There is a triple bond between the two nitrogen atoms.


 


The triple bond is pretty strong. Therefore, it needs a lot of energy to break those bonds and participate in a reaction. So nitrogen is commonly referred to as and used as an inert gas (high abundance & low cost.) However, it’s not truly inert like most noble gases. Nitrogen does react if the conditions are met. But those conditions are not exactly mild, but are not as extreme as for noble gases.


 


It forms nitric oxide and nitrogen dioxide with oxygen, ammonia with hydrogen, and nitrogen sulfide with sulfur.

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Q:

A bond formed by the transfer of electrons between atoms of the elements is called

A) Ionic bond B) Covalent bond
C) Co-ordinate bond D) Hydrogen bond
 
Answer & Explanation Answer: A) Ionic bond

Explanation:
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Q:

Harmful bacteria in drinking water cannot be destroyed by 

A) Chlorination B) boiling
C) adding caustic soda D) ozonisation
 
Answer & Explanation Answer: C) adding caustic soda

Explanation:

Water containing caustic soda cannot be used for drinking

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Q:

In isotopes the number of neutrons are

A) same B) different
C) both D) none
 
Answer & Explanation Answer: B) different

Explanation:
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Q:

Chemical name of Gold?

A) Argentinum B) Ferrus
C) Aurum D) Selenium
 
Answer & Explanation Answer: C) Aurum

Explanation:

The Chemical name of Gold is Aurum with symbol Au with atomic number 79 and a group 11 element. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal.

Chemically, gold is a transition metal.

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Q:

Milk is a 

A) mixture B) element
C) metal D) None of these
 
Answer & Explanation Answer: A) mixture

Explanation:
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Q:

Antimony is

A) metal B) non metal
C) non metaloid D) metalloid
 
Answer & Explanation Answer: D) metalloid

Explanation:
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Q:

The crop that has the highest photosynthetic activity -

A) Sugarcane B) Wheat
C) Cotton D) Rice
 
Answer & Explanation Answer: A) Sugarcane

Explanation:

Corn, sugar cane, and sorghum are C4 plants. These plants are economically important in part because of their relatively high photosynthetic efficiencies compared to many other crops.

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