List of top Chemistry Questions asked in Manipal

The rate constant for a first order reaction whose half-life, is $480\, s$ is:

Molecular orbital theory was given by:

Which one of the given transition metal ions is diamagnetic?

Which is chemically most active non-metal?

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 lightest particle is:

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

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

Solubility of iodine in water may be increased by adding:

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

Molecular formula of Glaubers salt is:

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?

In methane the bond angle is:

How many isomers are possible for the alkane $C_{4}H_{10}$ ?

Dipole moment is shown by:

Cyanide process is used for the extraction of

A sample of rock from moon contains equal number of atoms of uranium and lead. $t_{1 / 2}$ for $U =4.5 \times 10^{9}$ years. The age of the rock would be :

The action of enzymes in living system is to:

Which combinations of quantum numbers $n, l, m$ and $s$ for the electron in an atom does not provide a permissible solution of the wave equation?

$ Ca^{2+}$ is isoelectronic with:

Correct gas equation is:

Noble gases are adsorbed by:

Synthetic polymer which resembles natural rubber is: