List of top Chemistry Questions

Nitrogen combines with metals to form

Nitrobenzene can be prepared from benzene by using a mixture of conc. $ {HNO_3}$ and conc. $ {H_2SO_4}$ in the mixture, nitric acid acts as a/an :

Nitric oxide acts as a reducing agent in the reaction

Nickel is purified by thermal decomposition of its

$NH_4OH$ is a weak base but it becomes still weakerin the aqueous solution of

$NH_3$ has a much higher b.p. than $PH_3$ because

$NH_3$ and $BF_3$ form adduct readily because they form

Negative soil pollution is soil that is with

Natural rubber is which type of polymer ?

Natural sources of air pollution are

Name the products of the following reactions. (I) $C_6H_6$ reacts with methyl chloride in presence of $AlCl_3$. (II) $C_6H_6$ reacts with acetyl chloride in presence of $AlCl_3$. (III) $C_6H_6$ reacts with fuming nitric acid in presence of cone. $H_2SO_4$. (IV) $C_6H_6$ is catalytically hydrogenated.

Name the process used for purification of white bauxite ore containing no iron oxide as impurity

Name an element of p-block of the periodic tablein which last electron goes to the s-orbital ofvalence shell instead of p-orbitals

$NaCl_(aq)$ gives a white precipitate with $AgNO_{3}$ solution but $CCl_{4}$ or $CHCl_{3}$ does not, because

$Na^+$ ions in NaCl structure are present at

NaCl crystal belongs to the crystal system

Na(Sodium) reacts water water more vigorously than Li(Lithium) because

$Na$ and $Mg$ crystallise in BCC and FCC type crystals, then the number of $Na$ and $Mg$ atoms present in the unit cell of their respective crystal is

Multimolecular colloids are present in

Most abundant water pollutant is

Most abundant element in earth's crust in terms of number of atoms per 100 atoms is

Monoclinic sulphur is an example of monoclinic crystal system. What are the characteristics of the crystal system?

Molecules from 10 ml of m molar solution are adsorbed on 0.24 cm>sup>2 area forming unimolecular layer. Adsorbed molecules are cubic in shape determined the edge length of cube -

Mole fraction of $A$ in $H_2O$ is $0.2.$ The molality of $A$ in $H_2O$ is

Mole fraction of ethyl alcohol in aqueous ethyl alcohol solution is $0.25$. Hence percentage of ethyl alcohol by weight is