List of top Chemistry Questions

: $p$-dichlorobenzene is less soluble in organic solvents than the corresponding $o$-isomer. : $o$-dichlorobenzene is polar while $p$-dichlorobenzene is not

$NaCl$ is less soluble in heavy water than in ordinary water. Dielectric constant of ordinary water is more than that of heavy water.

Helium is used in diving apparatus. Solubility of helium is less in blood.

$H_2S$ is less acidic than $H_2$ Te Te has larger radius than S.

Fructose is a reducing sugar. It has a ketonic group.

: As a lead storage battery gets discharged, density of electrolyte, present in it, decreases. : Lead and lead dioxide both react with sulphuric acid to form lead sulphate.

An organic compound $'X'$ on treatment with pyridinium chlorochromate in dichloromethane gives compound $'Y'$ Compound $'Y'$ reacts with $I_{2}$ and alkali to form triiodomethane. The compound $'X'$ is

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

Which one of the following noble gases is used in miners cap lamps?

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

Which of the following is not tetrahedral?

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

Hofmann's bromamide reaction is to convert

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

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