set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following statement is not true?

a) Addition of solute to a solution increases its water potential

b) Water vapour pressure of any solution is lower than vapour pressure of pure water

c) Boiling point of any water solution is higher than pure water

d) When a solution is separated with the help of semipermeable membrane, then water flow can be stopped by giving pressure to the solution

Question : 2

Newlands could classify elements only upto

a) chlorine

b) calcium

c) copper

d) chromium

Question : 3

The octet rule is not valid for which one of the following molecules?

a) H₂S

b) NH₃

c) CO₂

d) BF₃

Question : 4

Consider the following statements:

1. Maximum covalency of carbon is 4, whereas maximum covalency of silicon is 6.
2. The maximum covalency of an element is limited to 6.

a) 2 only

b) Both 1 and 2

c) 1 only

d) Neither 1 nor 2

Question : 5

Match List-I with List-II:

a) A – (1), B – (3), C – (4), D – (2)

b) A – (3), B – (1), C – (2), D – (4)

c) A – (3), B – (4), C – (1), D – (2)

d) A – (3), B – (1), C – (4), D – (2)

Question : 6

Which one of the following is not a periodic property i.e., does not show any trend on moving from one side to the other in the periodic table?

a) Valency

b) Radioactivity

c) Atomic size

d) Electronegativity