EASY
10th CBSE
IMPORTANT
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Each group in Mendeleev’s periodic table was sub-divided into two sub groups.

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Important Questions on Periodic Classification of Elements

MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 2
The reaction Li++F-→LiF is exothermic.
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 3
The ionic radius of the cation is larger than the atomic radius of the parent atom. 
HARD
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 4
Transition metals show little variation in atomic size.
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 5
The first electron removed from oxygen atom is the one closest to the nucleus.
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 6
Boron is diagonally related to magnesium.
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 7
Similar electronic configuration is repeated after intervals of 2, 8, 8, 18 and 32 in extended form of periodic table.
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 8
Magnesium acts as a bridge element in second group of the Mendeleev periodic table.
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE Chemistry For Class X>Chapter 5 - Periodic Classification of Elements>Exercise 7>Q 9
Basic character of hydrides decreases along the period as well as down the group.