home Home » General Study » Chemistry - Questions and Answers Objective Questions

Chemistry - Questions and AnswersPage 26

251.

What is the colour of the oxygen in solid state?
(a)Pale yellow
(b)Pale blue
(c)Light green
(d)Greenish yellow
Comment
Answer is: ANA

252.

Which one of the following is used for writing on glass?
(a)Silicon
(b)Graphite
(c)Hydrogen fluoride
(d)Hydrogen iodide
Comment
Answer is: CNA

253.

Why is nitrogen molecule chemically less active?
(a)It has small atomic radius
(b)It has high electronegativity
(c)It has stable electronic configuration
(d)It has high dissociation energy
Comment
Answer is: DNA

254.

Red phosphorus is less reactive than yellow phosphorus because
(a)It is red in colour
(b)It is high polymerised
(c)It is insoluble in C2H5OH
(d)It is hard
Comment
Answer is: BNA

255.

Which among the following is an element?
(a)Alumina
(b)Brass
(c)Graphite
(d)Silica
Comment
Answer is: CNA

256.

Helium is preferred to hydrogen in air balloons because it?
(a)Is cheaper
(b)Is less dense
(c)Has greater lifting power
(d)Does not form an explosive mixture with air
Comment
Answer is: BNA

257.

Sugar of lead is
(a)PbCl2
(b)PbSO4
(c)Pb(CH3COO)2
(d)PbCO3
Comment
Answer is: CNA

258.

Which one of the following noble gases is not found in the atmosphere?
(a)Argon
(b)Krypton
(c)Radon
(d)Xenon
Comment
Answer is: CNA

259.

Calgon (Sodium metaphosphate) finds application as
(a)Artificial jewel
(b)Paint
(c)A resin
(d)Washing powder
Comment
Answer is: DNA

260.

Yellow colour of usual nitric acid is due to the presence of which one of the following?
(a)N2O
(b)NO
(c)N2O5
(d)NO2
Comment
Answer is: DNA

Comments

No comment yet.

copyright 2014-2018 This site is powered by sNews | Login