Chemistry - Study Mode

[#146] Tear gas is :
Correct Answer

(B) Carbonyl chloride

Explanation

Solution: Tear gas is Carbonyl chloride.

[#147] Tetra ethyle lead (TEL) is
Correct Answer

(D) An antiknock compound

Explanation

Solution: Tetra ethyle lead (TEL) is an antiknock compound.

[#148] Mercury is a :
Correct Answer

(B) Liquid metal

Explanation

Solution: Mercury is a liquid metal.

[#149] The lustre of the metals is because of
Correct Answer

(C) Reflection of light due to the presence of free electrons

Explanation

Solution: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the latin lux, meaning “light”, and generally implies radiance, gloss, or brilliance. Metals in general have high electrical conductivity, high thermal conductivity, and high density. Typically they are malleable and ductile, deforming under stress without cleaving. In terms of optical properties, metals are shiny and lustrous. Sheets of metal beyond a few micrometres in thickness appear opaque, but gold leaf transmits green light. Metallic (or splendant) minerals have the lustre of polished metal, and with ideal surfaces will work as a reflective surface. Examples include galena, pyrite and magnetite.

[#150] The non-metal found in the liquid state is
Correct Answer

(A) Bromine

Explanation

Solution: The non-metal found in the liquid state is bromine.