Chemistry Questions

Q:

The main use of salt in the diet is to

the_main_use_of_salt_in_the_diet_is_to1552126680.jpg image

A) produce in small amounts the hydrochloric acid required for the digestion of food B) increase the solubility of food particles in water
C) make the taste of food better D) ease the process of cooking
 
Answer & Explanation Answer: A) produce in small amounts the hydrochloric acid required for the digestion of food

Explanation:

The main use of salt in the diet is to produce in small amounts the hydrochloric acid required for the digestion of food.

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Q:

A particle which is four times in mass and two times in charge that of proton is

A) helium atom B) an alpha particle
C) deuteron D) tritium
 
Answer & Explanation Answer: B) an alpha particle

Explanation:
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Q:

What type of bond is joining the two hydrogen atoms?

A) Hydrophobic B) Ionic
C) Covalent D) Hydrophilic
 
Answer & Explanation Answer: C) Covalent

Explanation:

Covalent type of bonding joins The two hydrogen atoms are joned by Covalent type of bonding.

In this type of bonding, electrons are shared between the atoms in order to fill there valence shells. Thus sharing of electrons take place in between the hydrogen atoms.

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Q:

Recycled plant matter is known as ?

A) Decomposed B) Carbide
C) Compost D) None
 
Answer & Explanation Answer: C) Compost

Explanation:
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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:

When the nucleus of  Uranium is bombarded with neutrons, it breaks up into two nuclei of nearly equal mass. this process is called

A) nuclear fission B) nuclear fusion
C) physical change D) artificial radioactivity
 
Answer & Explanation Answer: A) nuclear fission

Explanation:
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Q:

Which of the following is the mixture

A) distilled water B) gasoline
C) liquified petroleum gas D) both (b) & (c)
 
Answer & Explanation Answer: D) both (b) & (c)

Explanation:
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Q:

Nucleus of Hydrogen atom consists of

A) 2 protons only B) 2 neutrons only
C) 1 proton only D) 1 electron only
 
Answer & Explanation Answer: C) 1 proton only

Explanation:

The nucleus of hydrogen consists of only a single proton.

Its parts are a single negatively-charged electron that circles a single positively-charged nucleus of the hydrogen atom.

The electron is bound to the nucleus by the Coulomb force.

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