D and F Block Elements Test

Result

D and F Block Elements Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

V₂O₅ is red or orange in colour. It is a/an..... oxide –

A
Acidic

B
Basic

C
Amphoteric

D
Neutral

Solution

V₂O₅ is red or orange in color and it is an amphoteric oxide.
Question 2
1 / -0

All the following species are strong oxidizing agents. Their strength as oxidizing agents in acidic solution is such that –

A
S₂O₈²– > Cr₂O₇^2– > MnO₄–

B
MnO₄– > Cr₂O₇^2– > S₂O₈^2–

C
S₂O₈²– > MnO₄– > Cr₂O₇^2–

D
MnO₄^– > S₂O₈^2– > Cr₂O₇^2–

Solution

The strength as oxidizing agents in acidic solution is in the order of
S₂O₈^–2 > MnO₄^– > Cr₂O₇^–2
Question 3
1 / -0

In [Fe(CN)₅ (NO⁺)]^2–, Fe has + 3 state, It can be decided by –

A
Magnetic measurement

B
Colligative property

C
Colour

D
Hybridization

Solution

Magnetic measurement of any complex can decide the resulting oxidation of any central metal.
Question 4
1 / -0

Which is not true statement about KMnO₄?

A
Its solution is unstable in acidic medium

B
Its small quantity added to conc. H₂SO₄, a green coloured solution containing MnO₃⁺ ion is formed

C
MnO₄^- changes to Mn²⁺ in basic solution

D
It is self- indicator in Fe²⁺ or C₂O₄^2– titration.

Solution

In basic medium KMnO₄ does not changes to Mn⁺², it changes to MnO₂