JEE Main 2020 (Online) 3rd September Evening Slot | d and f Block Elements Question 139 | Chemistry

5 g of zinc is treated separately with an excess of

(a) dilute hydrochloric acid and
(b) aqueous sodium hydroxide.

The ratio of the volumes of H₂ evolved in these two reactions is :

1 : 2

1 : 1

1 : 4

2 : 1

JEE Main 2020 (Online) 7th January Morning Slot

MCQ (Single Correct Answer)

-1

The atomic radius of Ag is closed to :

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

-1

The pair that has similar atomic radii is :

Mo and W

Mn and Fe

Ti and Hf

Sc and Ni

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