Chemistry · Chapter 1 of 11

Basic Concepts: BPSC & UPPCS Prelims PYQs

4 previous-year questions on Basic Concepts. Each one opens to its answer and explanation.

1. 1. 69th BPSC Prelims 2023

   The amount of solute present per unit volume or per unit mass of the solution/solvent is known as _____ in Chemistry.

   1. Acomposition of solute
   2. Bconcentration of solvent
   3. Cconcentration of solute
   4. Dconcentration of solution
   Answer and explanation →

2. 2. UPPSC Prelims 2022

   Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
   Assertion (A): A solution of table salt in a glass of water is homogeneous.
   Reason (R): A solution having different composition throughout is homogeneous.
   Select the correct answer from the code given below:

   1. A(A) is false but (R) is true
   2. B(A) is true but (R) is false
   3. CBoth (A) and (R) are true but (R) is not the correct explanation of (A)
   4. DBoth (A) and (R) are true and (R) is the correct explanation of (A)
   Answer and explanation →

3. 3. 65th BPSC Prelims 2019

   Who is regarded as the Father of Modern Chemistry?

   1. ARutherford
   2. BEinstein
   3. CLavoisier
   4. DC. V. Raman
   5. ENone of the above / More than one of the above
   Answer and explanation →

4. 4. UPPSC Prelims 2017

   If an unsaturated sugar solution is prepared by mixing 100 grams of sugar with half litre of water, which of the following physical quantities will not change?

   1. Amass
   2. Bdensity
   3. Cconcentration
   4. Dvolume
   Answer and explanation →