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 Chemistry Questions

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Q:

An atom that loses or gains electrons is called

A) Proton B) Ion
C) Isotope D) Neutron
 
Answer & Explanation Answer: B) Ion

Explanation:

An atom that loses or gains electrons is called as ion. Gaining of electron is negative charge and is called as Anion and lossing of eectron is called Cation.

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Q:

Which is a compound that contains carbon?

A) Ethane B) Propane
C) Methane D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The compound methane is a simple hydrocarbon contains one carbon bonded to four hydrogens. Ethane is a simple hydrocarbon which contains two carbon atoms and four hydrogen atoms. Similarly, propane with three carbons.

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Q:

What is the common characteristic of the elements of the same group in the periodic table?

A) Electrons in outer most shell B) Total number of electrons
C) Total number of protons D) Atomic weight
 
Answer & Explanation Answer: A) Electrons in outer most shell

Explanation:
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Q:

Brownish film formed on iron when left in open is called?

A) Dust B) Shovel
C) Spade D) Rust
 
Answer & Explanation Answer: D) Rust

Explanation:
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Q:

Which among the following is used in making liquors, medicines and as a fuel in aircrafts?

A) Propyl alcohol B) Dimethyl alcohol
C) Ethyl alcohol D) Methyl alcohol
 
Answer & Explanation Answer: C) Ethyl alcohol

Explanation:
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Q:

An example of an extensive property of matter is

A) Volume B) Mass
C) Density D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Any properties that are dependent on the amount of matter are called as extensive properties of matter.


Examples are :: Mass, Volume, Density (M/V),...

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Q:

Which of the following is not soluble in water?

A) sodium chloride B) potassium sulfate
C) copper(II) hydroxide D) silver nitrate
 
Answer & Explanation Answer: B) potassium sulfate

Explanation:

We know that,

All nitrates are soluble in water.

All chlorides are soluble in water with the exception of those formed with silver , lead , mercury ions as all halides are soluble.

Sulphates are soluble in water.

Hydroxides are not soluble in water.

 

Hence, copper(II) hydroxide is not soluble in water.

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Q:

Butter is colloid formed when

A) Proteins are dispersed in water B) Water is dispersed in fat
C) Fat globules are dispersed in water D) Carbohydrates are dissolved in water
 
Answer & Explanation Answer: C) Fat globules are dispersed in water

Explanation:
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