List of top Chemistry Questions

The chemical equivalent of copper and zinc are $32$ and $108$ respectively. When copper and silver voltmeter are connected in series and electric current is passed through for sometimes, $ 1.6\,g $ of copper is deposited. Then, the mass of silver deposited will be

Methylphenyl ether can be obtained by reacting

Lattice energy of an ionic compound depends upon :

Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point ?

In which part of atmosphere, ozone layer is present?

The cell membranes are mainly composed of

Name the structure of silicates in which three oxygen atoms of $[SiO_4]^{4-}$ are shared is

A solution of urea (mol mass $56\, g\, mol^{-1})$ boils at $100.18 ^\circ\,C$ at the atmospheric pressure. If $K_f$ and $K_b$ for water are $1.86$ and $0.512\, K\, kg$ $mol^{-1}$ the above solution will freeze at

The reaction in which phenol differs from alcohol is:

A mixture of two moles of carbon monoxide and one mole of oxygen, in a closed vessel is ignited to convert the carbon monoxide to carbon dioxide.If $\Delta H$ is the enthalpy change and $\Delta E$ is the change in internal energy, then,

With sodium hydroxide, silver nitrate forms a black precipitate of

When alcohol reacts with concentrated $H_{2}SO_{4},$ intermediate compound formed is :

In the manufacture of ordinary glass the substance used is

Which of the following reagents can be used to distinguish between phenol and benzyl alcohol ?

Power alcohol is

Smoke is an example of

Acetophenone when nitrated, the major product obtained is

Stainless steel is an alloy of

The minimum energy required to excite $H_2$ atom from its ground state is

Tranquilisers

Which of the following gives a white precipitate with alcoholic silver nitrate?

At $ 25^\circ $, the dissociation constant of a base, BOH is $ 1.0 \times 10^{-12} $. The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be

For a first order reaction, $A \longrightarrow B$, the reaction rate at reactant concentration of $0.01\, M$ is found to be $2.0 \times 10^{-5} \, mol \, \, L^{-1} s^{-1}$. The half-life period of the reaction is

Electrolytic reduction of nitrobenzene weakly acidic medium gives: