S-Block Elements Test

Result

S-Block Elements Test - 19

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Weekly Quiz Competition

Question 1
4 / -1

In the presence of cobalt chloride, bleaching powder decomposes to form

A
CaCO₃ and O₃

B
ClO₂ and CaO

C
Cl₂ and CaO

D
CaCl₂ and O₂
Question 2
4 / -1

Molecular formula of Glauber’s salt is

A
MgSO₄.7H₂O

B
CuSO₄.5H₂O

C
FeSO₄.7H₂O

D
Na₂SO₄.10H₂O
Question 3
4 / -1

Which of the following atoms will have the smallest size?

A
Mg

B
Na

C
Be

D
Li
Question 4
4 / -1

The properties of lithium are similar to those of Mg. This is because

A
Both have nearly the same size

B
The ratio of their charge to size is nearly the same

C
Both have similar electronic configurations

D
Both are found together in nature.
Question 5
4 / -1

Salt used for performing bead test in qualitative inorganic analysis is

A

B

C

D

Solution
Question 6
4 / -1

The chloride of an element A gives a neutral solution in water. In the periodic table, the element A belongs to

A
First group

B
Third group

C
Fifth group

D
First transition series
Question 7
4 / -1

Alkali metals are generally extracted by

A
Reduction methods

B
Double decomposition methods

C
Displacement methods

D
Electrolytic methods
Question 8
4 / -1

When CO is passed over solid NaOH heated to 200^oC, it forms

A
Na₂CO₃

B
H₂CO₃

C
HCOONa

D
All

Solution
Question 9
4 / -1

Anhydrous mixture of KF and HF contains which type of ions?

A
K⁺, H⁺, F^–

B
(KF)⁺ (HF)^–

C
KH⁺, F^–

D

Solution
Question 10
4 / -1

In electrolysis of NaCl when Pt electrode is taken then H₂ is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this is

A
Hg is more inert than Pt

B
More voltage is required to reduce H⁺ at Hg than at Pt

C
Na is dissolved in Hg while it does not dissolve in Pt

D
Concentration of H⁺ ions is larger when Pt electrode is taken.