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60 Days Revision Quiz on D & F Block Elements

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Question 1

Which of these is the correct order for paramagnetic character?

Question 2

Reduction by precipitation is known as

Question 3

A red solid is insoluble in water. However it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet colured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is

Question 4

In the thermite process of smelting the reduction of metallic oxides is done by

Question 5

Which one of the following nitrates will leave behind a metal on strong heating?

Question 6

9.65 C of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus, obtained is completely converted into a Grinard reagent. The number of moles of the Grinard reagent obtained is

Question 7

The chemical composition of slag formed during the smelting process in the extraction of copper is

Question 8

In the following sets of reactants which two sets best exhibit the amphoteric character of

?
Set 1:

(s) and

Set 2:

(s) and

Set 3:

(s) and

Set 4:

(s) and

Question 9

Cyanide process is used for extraction of:

Question 10

In the electrolytic refining of zinc,

Question 11

The yellow precipitate formed during the chromyl chloride test is chemically

Question 12

Consider the following ions:
(i) Ni²⁺ (ii) Co²⁺
(iii) Cr²⁺ (iv) Fe³⁺
(Given, at. no. Cr = 24, Fe = 26, Co = 27, Ni = 28)
The correct order of magnetic moment of these ions is