${\rm{H}}{{\rm{g}}_2}{\rm{C}}{{\rm{l}}_2}$

${\rm{H}}{{\rm{g}}_2}{\rm{C}}{{\rm{l}}_2}$ and Hg

${\rm{Hg}} + {\rm{HgC}}{{\rm{l}}_2}$

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JEE • CHEMISTRY • d & f- BLOCK ELEMENTS

D & f- BLOCK ELEMENTS practice · Easy

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Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

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Showing 61-90 of 139 questions

61 Easy

61 of 139

Remembering +4 | -1

\mathrm{C}{\mathrm{u}_2}\mathrm{O}

is:

View answer and explanation

Correct option: C

Red oxide of copper

Option C (Red oxide of copper) is correct because

\mathrm{C}{\mathrm{u}_2}\mathrm{O}

is commonly known as cuprous oxide or red oxide of copper.

62 Easy

62 of 139

Remembering +4 | -1

Calomel is:

View answer and explanation

Correct option: D

\mathrm{H}{\mathrm{g}_2}\mathrm{C}{\mathrm{l}_2}

Option D (

\mathrm{H}{\mathrm{g}_2}\mathrm{C}{\mathrm{l}_2}

) is correct because Calomel is the common name for Mercurous chloride, which has the chemical formula

\mathrm{H}{\mathrm{g}_2}\mathrm{C}{\mathrm{l}_2}

63 Easy

63 of 139

Understanding +4 | -1

The properties of Zr and Hf are similar because

View answer and explanation

Correct option: C

Both have similar radii

Option C is correct because Zr and Hf have very similar ionic radii due to the lanthanide contraction, leading to similar chemical properties.

64 Easy

64 of 139

Understanding +4 | -1

Which oxide is least stable at room temperature?

View answer and explanation

Correct option: B

\mathrm{A}{\mathrm{g}_2}\mathrm{O}

Option B (

\mathrm{A}{\mathrm{g}_2}\mathrm{O}

) is correct because silver oxide is thermodynamically less stable and decomposes at relatively low temperatures compared to the other oxides.

65 Easy

65 of 139

Understanding +4 | -1

Philosopher’s wool on heating with BaO at 1100

^\circ

C produce

View answer and explanation

Correct option: C

\mathrm{BaZn}{\mathrm{O}_2}

Option C (

\mathrm{BaZn}{\mathrm{O}_2}

) is correct because Philosopher's wool is zinc oxide (ZnO), and it reacts with barium oxide (BaO) at high temperatures to form barium zincate (

\mathrm{BaZn}{\mathrm{O}_2}

66 Easy

66 of 139

Remembering +4 | -1

The metallic oxide which impart purple colour to pottery is

View answer and explanation

Correct option: D

Manganese oxide

Option D (Manganese oxide) is correct because manganese oxide (

MnO_2

) is known to impart a purple color to pottery.

67 Easy

67 of 139

Remembering +4 | -1

A metal forms a volatile carbonyl compound and this property is taken advantages of its extraction. The metal is:

View answer and explanation

Correct option: B

Nickel

Option B (Nickel) is correct because nickel forms a volatile carbonyl compound,

\mathrm{Ni(CO)_4}

, which is used in the Mond process for nickel extraction.

68 Easy

68 of 139

Remembering +4 | -1

{\mathrm{K}_3}\mathrm{Fe}{\left( {\mathrm{CN}} \right)_6}

is used as ……. Indicator for

\mathrm{FeS}{\mathrm{O}_4}vs.{\mathrm{K}_2}\mathrm{C}{\mathrm{r}_2}{\mathrm{O}_7}

titrations.

View answer and explanation

Correct option: B

External

Option B (External) is correct because

{\mathrm{K}_3}\mathrm{Fe}{\left( {\mathrm{CN}} \right)_6}

reacts with

\mathrm{FeS}{\mathrm{O}_4}

internally, so it must be used externally.

69 Easy

69 of 139

Remembering +4 | -1

An important characteristic property of metals is:

View answer and explanation

Correct option: B

Their ability to conduct electricity

Option B (Their ability to conduct electricity) is correct because the ability to conduct electricity is a fundamental characteristic property of metals.

70 Easy

70 of 139

Remembering +4 | -1

Which of the following group of members are known as volatile metals :-

View answer and explanation

Correct option: C

\mathrm{Zn}, \mathrm{Cd}, \mathrm{Hg}

Option C (

\mathrm{Zn}, \mathrm{Cd}, \mathrm{Hg}

) is correct because Zinc, Cadmium, and Mercury are known for their relatively low boiling points, making them volatile metals.

71 Easy

71 of 139

Remembering +4 | -1

Which metal is not used for making coins?

View answer and explanation

Correct option: D

Tungsten

Option D (Tungsten) is correct because it is not typically used for making coins due to its high melting point and difficulty in minting.

72 Easy

72 of 139

Remembering +4 | -1

Highest oxidation state exhibited by an actinoid is

View answer and explanation

Correct option: D

Option D (7) is correct because Neptunium (Np) and Plutonium (Pu) can exhibit an oxidation state of +7.

73 Easy

73 of 139

Remembering +4 | -1

The colour imparted by

Co

(II) compounds to glass is:

View answer and explanation

Correct option: B

Deep blue

Option B (Deep blue) is correct because cobalt(II) compounds typically impart a deep blue color to glass due to the electronic transitions of Co2+ ions.

74 Easy

74 of 139

Analyzing +4 | -1

Assertion (A) : The spin only magnetic moment of

{Sc}^{3+}

1.73 {BM}

.

Reason (R) : The spin only magnetic moment (in

B M)

of an ion is equal to

\sqrt{n(n+2)}

, where

n

is the number of unpaired electrons present in the ion.

The correct answer is:

View answer and explanation

Correct option: D

(A) is not true but (R) is true

Option D is correct because Assertion (A) is false, as the spin-only magnetic moment of Sc3+ is 0 BM, and Reason (R) is true, as it correctly states the formula for calculating spin-only magnetic moment.

75 Easy

75 of 139

Remembering +4 | -1

Which of the following element is responsible for oxidation of water to

\mathrm{O}_2

in biological process?

View answer and explanation

Correct option: B

\mathrm{Mn}

Option B (Mn) is correct because manganese is a crucial component in the water-splitting complex of photosynthesis, which oxidizes water to produce oxygen.

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76 Easy

76 of 139

Remembering +4 | -1

Which chromium compound is widely used in tanning of leather?

View answer and explanation

Correct option: D

{\mathrm{K}_2}\mathrm{S}{\mathrm{O}_4}.\mathrm{C}{\mathrm{r}_2}{\left( {\mathrm{S}{\mathrm{O}_4}} \right)_3}.24{\mathrm{H}_2}\mathrm{O}

Option D (

{\mathrm{K}_2}\mathrm{S}{\mathrm{O}_4}.\mathrm{C}{\mathrm{r}_2}{\left( {\mathrm{S}{\mathrm{O}_4}} \right)_3}.24{\mathrm{H}_2}\mathrm{O}

) is correct because it represents chrome alum, which is widely used in the tanning of leather.

77 Easy

77 of 139

Remembering +4 | -1

Number of electrons present in the outermost orbit of Fe atom is:

View answer and explanation

Correct option: C

Option C (2) is correct because the number of electrons present in the outermost orbit of Fe atom is 2.

78 Easy

78 of 139

Remembering +4 | -1

On strongly heating

\mathrm{AgN}{\mathrm{O}_3}

we get:

View answer and explanation

Correct option: C

Option C (Ag) is correct because silver nitrate decomposes upon strong heating to produce silver metal, nitrogen dioxide, and oxygen gas.

79 Easy

79 of 139

Remembering +4 | -1

Photographic films or plates have …. as an essential ingredient.

View answer and explanation

Correct option: A

Silver bromide

Option A (Silver bromide) is correct because silver bromide is a light-sensitive compound that undergoes chemical changes upon exposure to light, making it essential for photographic films.

80 Easy

80 of 139

Remembering +4 | -1

In photography we use

View answer and explanation

Correct option: D

\mathrm{AgBr}

Option D (

\mathrm{AgBr}

) is correct because Silver Bromide is the photosensitive material primarily used in photographic films and papers.

81 Easy

81 of 139

Remembering +4 | -1

The alloy which contains nickel is:

View answer and explanation

Correct option: D

German silver

Option D (German silver) is correct because German silver is an alloy that contains nickel, along with copper and zinc.

82 Easy

82 of 139

Remembering +4 | -1

Chromium is used in making:

View answer and explanation

Correct option: C

Stainless steel

Option C (Stainless steel) is correct because stainless steel contains chromium, which provides corrosion resistance.

83 Easy

83 of 139

Understanding +4 | -1

Zn cannot displace the following ions from their aqueous solutions:

View answer and explanation

Correct option: D

\mathrm{N}{\mathrm{a}^ + }

Option D (

\mathrm{N}{\mathrm{a}^ + }

) is correct because Zn cannot displace ions with higher oxidation potential than itself, and Na has a higher oxidation potential.

84 Easy

84 of 139

Remembering +4 | -1

Which is used for electrical purposes?

View answer and explanation

Correct option: C

Constantan

Option C (Constantan) is correct because Constantan, an alloy of copper and nickel, has a high resistivity and low temperature coefficient, making it suitable for electrical purposes.

85 Easy

85 of 139

Remembering +4 | -1

The compound which gives oxygen on moderate heating is:

View answer and explanation

Correct option: B

Mercuric oxide

Option B (Mercuric oxide) is correct because mercuric oxide decomposes upon moderate heating to produce mercury and oxygen.

86 Easy

86 of 139

Remembering +4 | -1

Alloys of which metal are light and strong and are used in the manufacture of aeroplanes?

View answer and explanation

Correct option: D

\mathrm{Mg}

Option D (Mg) is correct because Magnesium alloys are known for being light and strong, making them suitable for aircraft manufacturing.

87 Easy

87 of 139

Remembering +4 | -1

In haemoglobin the iron shows oxidation state :

View answer and explanation

Correct option: B

+ 3

Option A (+2) is the correct oxidation state of iron in hemoglobin when it is in the ferrous form (Fe²⁺), which is capable of binding oxygen.

88 Easy

88 of 139

Remembering +4 | -1

The first man-made atom is:

View answer and explanation

Correct option: D

Option D (Tc) is correct because Technetium (Tc) was the first artificially produced element.

89 Easy

89 of 139

Remembering +4 | -1

Which of the following elements does not belong to the first transition series?

View answer and explanation

Correct option: A

Option A (Ag) is correct because Silver (Ag) belongs to the second transition series (4d series), while Fe, Cu, and V belong to the first transition series (3d series).

90 Easy

90 of 139

Analyzing +4 | -1

An aqueous solution of

\mathrm{FeS}{\mathrm{O}_4},\mathrm{A}{\mathrm{l}_2}{\left( {\mathrm{S}{\mathrm{O}_4}} \right)_3}

and chrome alum is heated with excess of

\mathrm{N}{\mathrm{a}_2}{\mathrm{O}_2}

and filtered. The materials obtained are:

View answer and explanation

Correct option: C

A yellow filtrate and a brown residue

The correct answer is C (

{\mathrm{N}_2}\left( {1\,\mathrm{g}\,\mathrm{atom}} \right) \to {\mathrm{N}_2}\left( {8\,\mathrm{g}\,\mathrm{atom}} \right)

) because compressing a gas reduces its entropy, leading to a negative change in entropy (ΔS).

Revision notes and key takeaways

Review d & f- BLOCK ELEMENTS in your textbook or class notes, then use this set to check your understanding.

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