Chemist Interview Preparation Guide
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Chemist related Frequently Asked Questions in various Chemist job Interviews by interviewer. The set of questions here ensures that you offer a perfect answer posed to you. So get preparation for your new job hunting

64 Chemist Questions and Answers:

1 :: What is Aliquot and Diluent?

Aliquot : It is a measured sub-volume of original sample
Diluent : Material with which sample is diluted

2 :: What is the difference between Molarity and Normality?

Both techniques are used to the amount of chemical present in the solution. However they are almost similar but differs in

► Molarity is used to know the total amount of molecules in a 1 litre solution
► It is expressed as moles of a compound per litre of solution

► Normality is used to know the total number of reactive units in 1 litre of solution
► It is expressed in equivalent per litre

3 :: What is Valency?

A valency is a property of a groups or atoms, equal to the number of atoms of hydrogen that the group or atom could combine with or displace it in forming compounds.

4 :: Explain the formula to calculate pH of a solution?

In order to calculate the pH of a solution you have to use the formula pH= -log [H+] or pH = -log [H3O+]

5 :: What is molality?

Molality is the number of solute that is present in 1 kg of a solvent.

6 :: Explain what is the metal used to extract copper from the solution of copper sulphate?

Fe or ferrous is the metal that is used to extract copper from the solution of copper sulphate.

7 :: What is titration?

Titration is a process to determine the molarity of a base or an acid. In this process a reaction is carried out between the known volumes of a solution with a known concentration, against the known volume of a solution with an unknown concentration.

8 :: What is the monomer of polyethene?

The monomer of polyethene is ethylene

9 :: Explain what is buffer?

A buffer is an aqueous solution which has highly stable pH. It is a blend of a weak acid and its conjugate base or vice versa. On adding small amount of base or acid to buffer, its pH hardly changes.

10 :: Explain why graphite rod is used in nuclear reactor?

Graphite rod is used in nuclear reactor to convert fast moving neutrons into thermal neutrons.