Chemistry - Study Mode

[#746] Acid rain is caused due to pollution of atmosphere by
Correct Answer

(B) Oxides of nitrogen and sulphur

Explanation

Solution: Acid rain is caused by a chemical reaction that begins when compounds like sulphur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

[#747] What are the components responsible for acid rain?
Correct Answer

(B) Sulphur dioxide (SO 2 ) and Nitrogen oxides (NO x )

Explanation

Solution: Sulphur dioxide (SO 2 ) and Nitrogen oxides (NO x ) are responsible for acid rain.

[#748] Which gas emitted by power stations causes acid rain?
Correct Answer

(B) Sulphur dioxide

Explanation

Solution: Power plants release the majority of sulphur dioxide and much of the nitrogen oxides when they burn fossil fuels, such as coal, to produce electricity. In addition, the exhaust from cars, trucks, and buses releases nitrogen oxides and sulfur dioxide into the air. These pollutants cause acid rain.

[#749] The structure of (HPO 3 ) 3 is
Correct Answer

(C) Cyclic

Explanation

Solution: The structure of (HPO 3 ) 3 is cyclic.

[#750] Spontaneous change is one in which there is:
Correct Answer

(B) A lowering of free energy

Explanation

Solution: Entropy and enthalpy together make a new quantity, the Free Energy which, under conditions of constant temperature and pressure, determines the direction of spontaneous change. All spontaneous processes have a negative change in free energy.