Chemistry Questions

Q:

The first two steps in the lithification process are

A) Cementation and Proposal B) Compaction and Ratification
C) Compaction and Cementation D) Ratification and Cementation
 
Answer & Explanation Answer: C) Compaction and Cementation

Explanation:

The first two steps in the lithification process are Compaction and Cementation.

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Q:

How many atoms are present in a (NH4)2SO4 molecule?

A) 15 B) 14
C) 13 D) 12
 
Answer & Explanation Answer: A) 15

Explanation:
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Q:

A change in which one or more new substances are formed is called _________.

A) Physical Change B) Chemical Change
C) Rusting D) Galvanisation
 
Answer & Explanation Answer: B) Chemical Change

Explanation:
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Q:

During which change is energy absorbed?

A) Exothermic B) Endothermic
C) Both A & B D) Neither A nor B
 
Answer & Explanation Answer: B) Endothermic

Explanation:

Endothermic reaction is the reaction in which energy is obserbed for the change.

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Q:

What element is used to disinfect swimming pools?

A) Fluorine B) Chlorine
C) Bromine D) Sulphur
 
Answer & Explanation Answer: B) Chlorine

Explanation:
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Q:

Which element is not a part of a nitrogenous base?

A) Carbon B) Oxygen
C) Phosphorous D) Nitrogen
 
Answer & Explanation Answer: C) Phosphorous

Explanation:

A nitrogenous base is an element that contains nitrogen that have same chemical properties of the base.

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Q:

In case of a standard hydrogen electrode

A) absolute electrode potential is not zero B) absolute electrode potential is zero
C) both absolute and standard electrode potential values are zero D) electrode potential is zero only at 25 deg C
 
Answer & Explanation Answer: A) absolute electrode potential is not zero

Explanation:

The Standard hydrogen electrode (abbreviated SHE), is a redox electrode which forms the basis of the thermodynamic scale of oxidation-reduction potentials. Its absolute electrode potential is estimated to be 4.44 ± 0.02 V at 25 °C, but to form a basis for comparison with all other electrode reactions, hydrogen's standard electrode potential (E0) is declared to be zero volts only at 298.

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Q:

Which of the following is not a type of chemical weathering?

A) Corrosion B) Solution
C) Oxidation D) Carbonation
 
Answer & Explanation Answer: A) Corrosion

Explanation:

Chemical weathering is the process of altering rocks chemically when they are broken down. It includes hydrolysis, oxidation, acid rain, etc...

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