Chemistry - Study Mode

[#576] Commercial nitric acid is coloured because it contains dissolved :
Correct Answer

(C) Nitrogen dioxide

Explanation

Solution: Commercial nitric acid has a brown colour due to dissolved NO 2 . The procedure of bubbling dry air through warm commercial nitric acid, is to drive away the dissolved nitrogen dioxide so that the acid becomes colourless.

[#577] Choose the incorrect statement pertaining to organic compounds
Correct Answer

(C) They are not easily combustible

Explanation

Solution: Typical organic compounds are combustible by nature as they contain carbon. Organic compounds mostly consist of carbon, hydrogen, halogen, and phosphorus.

[#578] The gas which emits from rice field is
Correct Answer

(B) Methane

Explanation

Solution: Rice paddy fields are a source of the GHGs carbon dioxide (CO 2 ), methane (CH 4 ) and nitrous oxide (N 2 O).

[#579] Ethylene is a ________ molecule.
Correct Answer

(D) Nonpolar

Explanation

Solution: Ethylene is a nonpolar molecule.

[#580] The next higher homologue of C 6 H 14 is
Correct Answer

(D) C 7 H 16

Explanation

Solution: The next higher homologue of C 6 H 14 is C 7 H 16 .