MCQ'S PHYSICS CLASS 10 PERIODIC TABLE

 PERIODIC TABLE

1. Pick out the chemically most reactive elements from the given triads.

Li, Na, K F, Cl, Br

(a) Li and F

(b) Li and Br

(c) K and F

(d) K and Br

Answer: c

2.The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element:

(a) Scandium

(b) Germanium

(c) Gallium

(d) Aluminium

Answer: c

3.At the time of Mendeleev, the number of elements known was

(a) 63

(b) 65

(c) 62

(d) 64

Answer: a

4. Upto which element, the Law of Octaves was found applicable?

(a) Oxygen

(b) Calcium

(c) Cobalt

(d) Potassium

Answer: b

5.How many periods and groups are present in the periodic table?

a) 7 periods and 18 groups

b) 8 periods and 7 groups

c) 7 periods and 7 groups

d) 8 periods and 8 groups

Answer: (a) 7 periods and 18 groups

6. Which of the following forms the basis of the modern periodic table?

a) Atomic mass

b) Atomic number

c) Number of nucleons

d) All of these

Answer: (b) Atomic number

7.What is the other name for group 18th elements?

a) Noble gases

b) Alkali metals

c) Alkali earth metals

d) Halogens

Answer: (a) Noble gases

8. Which one of the following does not increase while moving down the group of the periodic table?

(a) Atomic radius

(b) Metallic character

(c) Valence

(d) Number of shells in an element.

Answer: (c) Valence

9. In modern periodic table, elements are arranged according to their

(a) atomic weight

(b) density

(c) atomic number

(d) melting point

Answer: (c) atomic number

10. The amount of energy released when one or more electrons is added to the neutral atom is

(a) electron affinity

(b) ionisation energy

(c) electron negativity

(d) atomicity

Answer: (a) electron affinity

Bits Prepared By 

Amrutha 

Class 10 

VIDYODAYA ENGLISH MEDIUM  HIGH SCHOOL