Periodic Table Periodic Properties and Variations of Properties Class 10 ICSE Chemistry MCQ Questions

Periodic Table Periodic Properties and Variations of Properties Class 10 ICSE Chemistry MCQ Questions

Looking for Periodic Table Periodic Properties and Variations of Properties Class 10 ICSE Chemistry Chapter 1 MCQ Questions? If yes, You are the right page. Here we have provided ICSE class 10 chemistry Chapter 1 multiple choice questions and answers. All MCQ are important.

1) The physical and chemical properties of elements are periodic function of their.

a) Atomic masses

b) Atomic number

c) Electron

d) Proton

Ans- atomic number

2) There are ________ horizontal rows in modern Periodic table.

a) 3

b) 6

c) 9

d) 7

Ans- 7

3) The number of shells____ from top to bottom.

a) Increases

b) Decreases

c) Remains the same

d) First increases then decreases

Ans- increases

4) Valency of an atom increases only upto.

a) Group 12

b) Group 13

c) Group 14

d) Group 15

Ans- group 14

5) An increase in nuclear charge _____ the size of atom.

a) Increases

b) Decreases

c) Remains the same

d) Non of the above

Ans- decreases

6) Cation is always_______than the parent atom.

a) Greater

b) Smaller

c) Equal

d) Few cations are smaller few are greater.

Ans- smaller

7) In a Period the size of an atom decreases from

a) Left to right

b) Right to left

c) Top to bottom

d) Bottom to top

Ans- left to right

8) Electronic configuration of phosphorus is

a) 2,8,2

b) 2,8,5

c) 2,8,4

d) 2,8,8

Ans- 2,8,5

9) Non metallic character_____across a period from left to right.

a) Decreases

b) Increases

c) Remains the same

d) First increases then decreases

10) The reactivity of elements depends upon their tendency to lose or gain electrons to complete their_____

a) Innermostorbit

b) Middle orbit

c) Outermost orbit

d) 2nd orbit

Ans- outermost orbit

11) The most reactive Non- metal in group 17 is

a) Chlorine

b) Bromine

c) Fluorine

d) Iodine

Ans- Fluorine

12) Melting point of lithium is

a) 63°c

b) 774°c

c) -187°c

d) 180.5°c

Ans- 180.5°c

13) When an extra electron is added to an atom energy is

a) Absorbed

b) Released

c) Both

d) None of the above

Ans-released

14) Boiling point of chlorine is

a) 94°c

b) -101°c

c) -34.6°c

d) +113.6°c

Ans- -34.6°c

15) The greater the size of an atom the _____ will be the electronegetivity.

a) Greater

b) Lesser

c) Moderate

d) All of these.

Ans- Lesser

16) Atomic number is

a) Number of protons

b) Number of neutrons

c) Number of protons+ neutrons

d) Number of protons+ electrons

Ans- number of protons

In case you have missed: This Chapter Assertion (A) and Reason (R) type Question

17) Boiling point of an atom______ down the group.

a) Increases from group 1 to 14 and then decreases

b) Decreases from group 1 to 14 then increases

c) Increases

d) Group 1 and 2 decrease, group 5 to 7 increases

Ans- group 1 and 2 decreases, group 5 to 7 increases

18) Longest type of period has

a) 32 elements

b) 56 elements

c) 26 elements

d) 36 elements

Ans- 32 elements

19) Halogens possess_____ electrons

a) 5

b) 6

c) 7

d) 8

Ans – 7

20) Alkalis have

a) Highest ionisation enthalpy

b) Lowest ionisation enthalpy

c) Moderate ionisation enthalpy

d) Higher at first and then becomes low

Ans- lowest ionisation enthalpy

21) Alkali metals form

a) Covalent compund

b) Ionic compound

c) Coordinate compound

d) All of these

Ans- ionic compounds

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