List of top Chemistry Questions

The correct order of increasing acid strength of the compounds :

Solubility product of $ BaCl_{2}$ is $ 4\times 10^{-9}$ . Its solubility would be:

Solubility of iodine in water may be increased by adding:

Rate of a reaction can be expressed by Arrhenius equation as : $k = Ae^{-E/RT}$ In this equation, E represents :

Oxidation number of $ N $ in $ NH_{3}$ (hydrazoic acid) is:

Octahedral structure is shown by

Molecular formula of Glaubers salt is:

In $Fe(CO)_5$ > the Fe?? bond possesses :

In $[Ag(CN)_2]^-$ , the number of $\pi$ bonds is

HBr reacts with $CH_2=CH??CH_3$ under anhydrous conditions at room temperature to give :

For a spontaneous process the correct statement is

1 mole of $H_{2}$ and 2 moles of $I_{2}$ are taken initially in a 2 litre vessel. The number of moles of $H_{2}$ at equilibrium is 0.2. Then the number of moles of $I_{2}$ and $HI$ at equilibrium are

In terms of energy $1$ amu is equal to:

The half-life period of a radioactive material is $15\, \min.$ What per cent of radioactivity of that material will remain after $45$ minutes?

For reversible process, the value of $\Delta S$ is gives by the expression:

The value of amu is which of the following?

When $ {{H}_{2}}S $ gas is passed in a metal sulphate solution in presence of $ N{{H}_{4}}OH $ , a white precipitate is produced. The metal is identified as:

The molecule having largest dipole moment among the following is:

Which one of the following can produce hydrogen when treated with metallic sodium?

$ CH_3COOH $ is weaker acid than $H_2SO_4$ . It is due to:

Water in liquid state is more stable than ice at room temperature. Water in liquid form has higher entropy than ice.

In the iodometric titration starch is used as an indicator. Starch is a polysaccharide.

Graphite is an example of tetragonal crystal system. For a tetragonal system, $a=b \neq c, \alpha=\beta$ $=90^{\circ}, \gamma=120^{\circ}$

Total volume of atoms present in a face-centred cubic unit cell of a metal is (r is atomic radius):

According to Bohr?? theory, the angular momentum of an electron in 5th orbit is :