set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following properties generally decrease along a period?

a) Non-metallic character

b) Metallic character

c) Atomic size

d) Both (a) and (c)

Question : 2

Match List-I (Oxidation number) with List-II (the element) and select the correct answer using the code given below the lists

a) 4 3 1 2

b) 3 4 2 1

c) 3 4 1 2

d) 4 3 2 1

Question : 3

The long form of periodic table consists of

a) seven periods and eighteen groups

b) eight periods and eighteen groups

c) seven periods and eight groups

d) eighteen periods and eight groups

Question : 4

Which of the following elements A, B, C, D and E with atomic number 3, 11, 15, 18 and 19 respectively belong to the same group?

a) B, C, D

b) A, D, E

c) A, B, C

d) A, B, E

Question : 5

Which element is more electronegative among halogens?

a) Cl

b) F

c) Br

d) I

Question : 6

A binary liquid solution is prepared by mixing n-heptane and ethanol. Which of the following statements is incorrect regarding the behaviour of the solution?

1. The solution is non-ideal, showing -ve deviation from Raoult’s Law.
2. The solution is non-ideal, showing +ve deviation from Raoult’s Law.
3. n-heptane shows +ve deviation while ethanol shows –ve deviation from Raoult’s Law.
4. The solution formed is an ideal solution.

a) 1, 2 and 4

b) 1, 2 and 3

c) 1, 3 and 4

d) 2, 3 and 4