NEETprep Bank NEET Chemistry The d and f Block Elements Questions Solved


CuSO4 (aq.)H2SMof KCNExcessN+O

Then final products N and O are respectively.

(a) [Cu(CN)4]3-,(CN)2

(b) CuCn,(CN)2

(c) [Cu(CN)4]2-,(CN)2

(d) Cu(CN)2,K2S

Concept Videos :-

#1 | Intro to d-Block
#2 | 3d Series: I
#3 | 3d Series: II
#4 | Properties of 4d & 5d Elements
#5 | Trends of d Block Elements : I
#6 | Trends of d Block Elements: II
#9 | Reactions of d Block

Concept Questions :-

d-Block Elements,Physical and Chemical properties.
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CrO42- (yellow) changes to Cr2O72- (orange) in pH =x and vice versa in pH=y. Hence, x and y are:

(a) 6,8

(b) 6,5

(c) 8,6

(d) 7,7

Concept Videos :-

#7 | Reactions of KMNO4 & K2Cr2O7: I
#8 | Reactions of KMNO4 & K2Cr2O7: II

Concept Questions :-

Chemistry of KMnO4, K2Cr2O7 & CrO5 and others
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When steam is passed over red hot iron , the substances formed are:

(a) Fe2O3 +H2

(b) Fe3O4 +H2

(c) FeO +H2

(d) FeO+ H2 +O2

Concept Videos :-

#1 | Intro to d-Block
#2 | 3d Series: I
#3 | 3d Series: II
#4 | Properties of 4d & 5d Elements
#5 | Trends of d Block Elements : I
#6 | Trends of d Block Elements: II
#9 | Reactions of d Block

Concept Questions :-

d-Block Elements,Physical and Chemical properties.
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Which of the following solid salt on heating with K2Cr2O7 and Conc. H2SO4 orange,red vapours are evolved which turn aquous NaOH solution yellow?

(a) NaBr

(b)NaCl

(c) NaNO3

(d) NaI

Concept Videos :-

#1 | Intro to d-Block
#2 | 3d Series: I
#3 | 3d Series: II
#4 | Properties of 4d & 5d Elements
#5 | Trends of d Block Elements : I
#6 | Trends of d Block Elements: II
#9 | Reactions of d Block

Concept Questions :-

d-Block Elements,Physical and Chemical properties.
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Consider the following transformation:

2CuX2room temperature2CuX+X2

Then X- can be :

(a) F-,Br-

(b) Cl-,Br-

(c) CN-

(d) Cl-,F-

Concept Videos :-

#1 | Intro to d-Block
#2 | 3d Series: I
#3 | 3d Series: II
#4 | Properties of 4d & 5d Elements
#5 | Trends of d Block Elements : I
#6 | Trends of d Block Elements: II
#9 | Reactions of d Block

Concept Questions :-

d-Block Elements,Physical and Chemical properties.
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Fe is made passive by :

(a) dil . H2SO4

(b) dil. HCl

(c) Conc. HNO3

(d) Conc. H2SO4

Concept Videos :-

#1 | Intro to d-Block
#2 | 3d Series: I
#3 | 3d Series: II
#4 | Properties of 4d & 5d Elements
#5 | Trends of d Block Elements : I
#6 | Trends of d Block Elements: II
#9 | Reactions of d Block

Concept Questions :-

d-Block Elements,Physical and Chemical properties.
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The iron salt used in blue prints is:

(a) FeC2O4

(b) Fe2(C2O4)3

(c) K4Fe(CN)6

(d) FeSO4

Concept Videos :-

#1 | Intro to d-Block
#2 | 3d Series: I
#3 | 3d Series: II
#4 | Properties of 4d & 5d Elements
#5 | Trends of d Block Elements : I
#6 | Trends of d Block Elements: II
#9 | Reactions of d Block

Concept Questions :-

d-Block Elements,Physical and Chemical properties.
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Which has highest melting point?

1. Cr

2. Fe

3. Cu

4. Mo

Concept Videos :-

#1 | Intro to d-Block
#2 | 3d Series: I
#3 | 3d Series: II
#4 | Properties of 4d & 5d Elements
#5 | Trends of d Block Elements : I
#6 | Trends of d Block Elements: II
#9 | Reactions of d Block

Concept Questions :-

d-Block Elements,Physical and Chemical properties.
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The colour of KMnO4 is due to

1. d-d transition

2. Charge transfer spectra

3. Polarisation of ion

4. p-d transition

Concept Videos :-

#7 | Reactions of KMNO4 & K2Cr2O7: I
#8 | Reactions of KMNO4 & K2Cr2O7: II

Concept Questions :-

Chemistry of KMnO4, K2Cr2O7 & CrO5 and others
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Which of the following element does not show the variable oxidation state?

1. Fe

2. Mn

3. Cu

4. Zn

Concept Videos :-

#1 | Intro to d-Block
#2 | 3d Series: I
#3 | 3d Series: II
#4 | Properties of 4d & 5d Elements
#5 | Trends of d Block Elements : I
#6 | Trends of d Block Elements: II
#9 | Reactions of d Block

Concept Questions :-

d-Block Elements,Physical and Chemical properties.
To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level: