Chemistry Questions

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 one of the following elements does not form solid hydrogen carbonate?

A) Sodium B) Potassium
C) Caesium D) Lithium
 
Answer & Explanation Answer: D) Lithium

Explanation:

Potassium bicarbonate (also known as potassium hydrogen carbonate or potassium acid carbonate) is the inorganic compound with the chemical formula KHCO3. It is a white solid

Sodium bicarbonate is a white solid that is crystalline, but often appears as a fine powder.

LiHCO3 is found in solution form while rest alkali metals hydrogen carbonates are solid due to the anomalous properties of Li and its diagonal relationship with the Mg.

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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:

What is the percentage of oxygen in Al2(SO4)3?

A) 57.7% B) 56.1%
C) 53.1% D) 52.6%
 
Answer & Explanation Answer: B) 56.1%

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Q:

An ionic bond is formed when

A) sharing of electrons B) transfer of electrons
C) Both A & B D) losing of protons
 
Answer & Explanation Answer: B) transfer of electrons

Explanation:

An ionic bond is formed in between the two atoms with the transfer of electrons from an atom to the other to become stable after pairing.

an_ionic_bond_is_formed_when1535690989.jpg image

The atom which has low ionization energy will give some of its electrons to get stable electronic configuration .

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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

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Q:

The atomic mass of an element depends upon the

A) number of electrons B) number of protons
C) number of neutrons D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The atomic mass of an element depends upon the number of protons, electrons and neutrons in the atoms which make the elements.

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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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