classification of elements, chemical bonding, periodicity in properties & physical transformation - Category wise Question and Answer Practice Test with Solutions

Question : 6

On moving horizontally across a period, the number of electrons in the outermost shell increases from ...... to .......

a) 2, 18

b) 1, 8

c) 2, 8

d) 1, 18

Question : 7 [CDS]

Which element forms the highest number of compounds in the periodic table?

a) Oxygen

b) Silicon

c) Carbon

d) Sulphur

Question : 8 [NDA]

As compared to covalent compounds, electrovalent compounds, generally have

a) low melting point and high boiling point

b) high melting point and low boiling point

c) low melting point and low boiling point

d) high melting point and high boiling point

Question : 9 [NDA]

What is the correct increasing order of electronegativity for the most common oxidation states among the following elements ?

a) C < N < C < F

b) C < N < F < O

c) F < O < N < C

d) C < N < O < F

Question : 10

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