Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Multiple Choice Questions (MCQs)>Q 49

HARD

10th CBSE

IMPORTANT

Earn 100

The atomic numbers of the elements $Na, Mg, K$ and $Ca$ are $11, 12, 19$ and $20$ , respectively. The element having the largest atomic radius is:

50% studentsanswered this correctly

Important Questions on Periodic Classification Of Elements

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Multiple Choice Questions (MCQs)>Q 50

Which of the following are the correct characteristics of isotopes of an element?
i. Same atomic mass
ii. Same atomic number
iii. Same physical properties
iv. Same chemical properties

HARD

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Multiple Choice Questions (MCQs)>Q 51

The correct formula of the oxide of Eka-aluminium element predicted by Mendeleev was:

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Multiple Choice Questions (MCQs)>Q 52

The element which can form an acidic oxide should be the one whose atomic number is:

HARD

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Multiple Choice Questions (MCQs)>Q 53

The element which forms a basic oxide has the atomic number of:

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Multiple Choice Questions (MCQs)>Q 54

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

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Multiple Choice Questions (MCQs)>Q 55

On moving from left to right in a period of the periodic table, the atomic number of elements increases. What happens to the size of atoms of elements on moving from left to right in a period?

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Multiple Choice Questions (MCQs)>Q 56

Which of the following set of elements is written correctly in the order of their increasing metallic character?

HARD

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Questions Based on High Order Thinking Skills (HOTS)>Q 57

The atomic numbers of three elements $X, Y$ and $Z$ are $2, 6$ and $10$ respectively.

Which two elements belong to same group?