Chemistry Test ...

Which among the following combination is present in the higher amount in hard water?

Where is the world’s largest oil refinery operated by Reliance Petroleum located?

In $32$ minutes, $75\%$ of a first order reaction was found to be complete. When would $50\%$ of the same reaction be complete?

_____________ is the process of conversion of a solid directly into vapour.

What is the atomic number of Iron?

A catalyst _______.

The boiling point of water is _______ at 1 atmospheric pressure that is, at sea level.

Mp denotes the mass of a proton and M_n that of a neutron. A given nucleus of binding energy B contains Z protons and N neutrons. The mass M (N, Z) of the nucleus is given by?

Which of the following orbitals has the lowest screening effect?

An atom of an element with mass number 23 and atomic number 11 will have     .