Osmium has the maximum density amongst metals.

Important Questions on Periodic Classification of Elements

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 12

Rare earths is the name given to members of Lanthanoid series.

HARD

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 13

p-Block elements do not impart any characteristic colour to the flame.

HARD

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 14

Zero group elements are paramagnetic.

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 15

On moving horizontally across a period, number of valence electrons increases.

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 16

${\mathrm{Al}}_2{\mathrm{O}}_3$ is an amphoteric oxide.

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 17

The first member of lanthanoid series is lanthanum.

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 18

Third group of the periodic table accommodates maximum number of elements.

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 19

Mendeleev's periodic law was based on atomic number of the elements.