List of top Chemistry Questions

Transition elements form a large number of coordination compounds because they have

What is the cell reaction occurring in Daniel cell (Galvanic cell)?

The percentage of soil volume occupied by pore space is called porosity of soil. It is minimum in:

The number of ether isomers possible for $C_{4}H_{10}O$ are:

The magnitude of any physical quantity

The lightest particle is:

The increasing order of stability of the following free radicals is:

The incorrect statement among the following is

The hybrid state of sulphur in SO$_3$ molecule is

The general molecular formula, which represents the homologous series of alkanols is :

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: