List of top Chemistry Questions

The number of hydroxyl groups in pyrophosphoric acid is

The solubility of AgCl will be minimum in

When $I_2$ is dissolved in $CCI_4$ the colour that results is

The number of unpaired electrons in $Zn^{2+}$ is

Reduction of 2-butyne with sodium in liquid ammonia gives predominantly

Which one of the following on oxidation gives a ketone?

Which of the following fertilizers has the highest nitrogen percentage ?

When $CuSO_4 $ is electrolysed using platinum electrodes?

What is formed when a primary alcohol undergoes catalytic dehydrogenation?

In the fluorite structure, the coordination number of $ Ca^{2+}$ ion is

Which one of the following has the smallest heat of hydrogenation per mole ?

Equal weights of ethane and hydrogen are mixed in an empty container at $25^\circ$ C. The fraction of the total pressure exerted by hydrogen is

Increasing order of acidic strength among p-methoxy phenol (I), p-methyl phenol (II) and p-nitrophenol (III) is

Electronic configuration of calcium atom can be written as

Elements of which of the following groups will form anions most readily?

The correct value of the gas constant 'R' is close to

$H_3PO_2$ is the molecular formula of an acid of phosphorous. Its name and basicity respectively are

The energy of an electron in the $nth$ Bohr orbit of H - atom is

Bakelite is a product of the reaction between

When phenol is treated with excess of bromine water, it gives

A is a lighter phenol and B is an aromatic carboxylic acid. Separation of a mixture of A and B can be carried out easily by using a solution of

At its melting point ice is lighter than water because

Strength hydrogen bonding is shown by

Water gas is produced by

Which one is a colligative property?