List of top Chemistry Questions

An alkyl halide reacts with metallic sodium in dry ether. The reaction is known as :

Vicinal and geminal dihalides can be distinguished by

What is the velocity of electron present in first Bohr orbit of hydrogen atom?

In a reaction $2 A+B \longrightarrow 3 C$, the concentration of $A$ decreases from $0.5\, mol \,L \,^{-1}$ to $0.3\, mol\, L^{-1}$ in $10$ minutes. The rate of production of $C$ during this period is

The bond length of HCl molecule is $1.275 \, ?$ and its dipole moment is 1.03 D. The ionic character of the molecule (in percent) (charge of electron $4.8 \times 10^{-10}$ esu) is

All are primary pollutants except

Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

What process is used to make soap from fat?

F-centres in an ionic crystal are

How many oxygen atoms will be present in $88\, g$ of $CO_2$

The pH value of N/10 NaOH is

$[Fe(CN)_6 ]^{3-}$ ion is

Fluorine molecule is formed by

Ionic bonds are directional in nature whereas covalent bonds are non-directional. According to orbital overlap concept, the formation of a covalent bond between two atoms results by pairing of electrons present in the valence shell having same spins.

...................is a potent vasodilator

The disease kalaazar is cured by

The oxidation number of chromium in $K_2Cr_2O_7$ is

The vitmain which is neither soluble in water nor in fat is

Isopropyl alcohol on oxidation forms

Adiabatic expansions of an ideal gas is accompanied by

A1 and A2 are two ores of metal M. A1 on calcination gives black precipitate, CO2 and water, and A2 forms a green-coloured complex with acidified K2Cr2O7. 

A1 and A2 respectively are

The vapour pressure of water at 20 °C is 17.5 torr. What will be the no. of moles of water present in one litre of air at 20 °C and 40% relative humidity. (R =0.082 L atm/mol-k)