List of top Chemistry Questions

Which of the following is not tetrahedral?

$CH _{3} COOH \xrightarrow{ LiAlH _{4}}A + CH _{3} COOH \xrightarrow{ H _{3} O ^{+}} B + H _{2} O$ In the above reactions ' $A$ ' and ' $B$ ' respectively are

The following are some statements related to $VA $ group hydrides, I. Reducing property increases from $NH_{3}$ to $BiH_{3}$ II. Tendency to donate lone pair decreases from $NH_{3}$ to $BiH_{3}$ III. Thermal stability of hydrides decreases from $NH_{3}$ to $BiH_{3}$ IV. Bond angle of hydrides decreases from $NH_{3}$ to $BiH_{3}$ The correct statements are

$138\, g$ of ethyl alcohol is mixed with $72\, g$ of water. The ratio of mole fraction of alcohol to water is

When conc. $H _{2} SO _{4}$ is heated with $P _{2} O _{5}$, the acid is converted into

The correct order in which the first ionisation potential increases is

Hofmann's bromamide reaction is to convert

Nitration of nitrobenzene at $125^{\circ} C$ with mixed acids gives

Ammonium ion is

Which of the following has highest ionic radii?

Which of the following is not a peroxy acid?

Which of these do not form Grignard reagent?

Which one of the following is most reactive towards electrophilic reagent?

Which of the following does, not show $S _{ N _{2}}$ reaction?

Which of the following compounds has the lowest melting point ?

What is the value of electron gain enthalpy of $Na^+$ if $IE_1$ of $Na = 5.1 \, eV$?

$ {BaO_2}$ and ozone reacts to produce

Bleaching powder is obtained by treating $ {Cl_2}$ with

An electron moves away from the nucleus, its potential energy

Colour imparted to the flame by $Ba^{2+}$ is

Which one of the following is paramagnetic?

Which of the following molecular spedes has impaired electron(s) ?

Which one of the following have lowest $pK_a$?

One mole of oxygen at $273\, k$ and one mole of sulphur dioxide at $546 \,k$ are taken in two separate containers, then,

Aluminium oxide is not reduced by chemical reactions since