Chemistry - Study Mode

[#966] The gas which turns into liquid at the lowest temperature among the following is
Correct Answer

(A) Hydrogen

Explanation

Solution: Liquid hydrogen (LH 2 ) is the liquid state of the element hydrogen. Hydrogen is found naturally in the molecular H 2 form. To exist as a liquid, H 2 must be cooled below hydrogen’s critical point of 33 K. However, for hydrogen to be in a full liquid state without evaporating at atmospheric pressure, it needs to be cooled to 20.28 K (-423.17 °F/-252.87°C). One common method of obtaining liquid hydrogen involves a compressor resembling a jet engine in both appearance and principle. Liquid hydrogen is typically used as a concentrated form of hydrogen storage

[#967] The gas that is used in the manufacture of vanaspati ghee is :
Correct Answer

(C) Hydrogen

Explanation

Solution: Hydrogen gas is used in the manufacture of Vanaspati Ghee.

[#968] Which one of the following metals does not react with water to produce Hydrogen ?
Correct Answer

(B) Cadmium

Explanation

Solution: Cadmium does not react with water to produce hydrogen.

[#969] Which of the following vegetable oils does not contain essential fatty acids ?
Correct Answer

(A) Sunflower oil

Explanation

Solution: Sunflower oil is high in the essential vitamin E and has no essential saturated fat.

[#970] The example of oligosaccharide is
Correct Answer

(A) Sucrose

Explanation

Solution: Oligosaccharides are formed when two or more monosaccharides join together by O-glycosidic bonds. It is an example of sucrose.