Assertion: HNO 3 makes iron passive. Reason: HNO 3 forms a protective layer of ferric nitrate on the surface of the iron.

Assertion is correct, but Reason is the wrong statement.

Both Assertion and Reason are correct statements, and Reason is the correct explanation of the Assertion.

Both Assertion and Reason are correct statements, and Reason is not the correct explanation of the Assertion.

Assertion is wrong but Reason is the correct statement.

Assertion: HI cannot be prepared by the reaction of KI with concentrated H 2 SO 4 . Reason: HI has the lowest H—X bond strength among halogen acids.

Both Assertion and Reason are correct statements, and Reason is not the correct explanation of the Assertion.

Both Assertion and Reason are correct statements, and Reason is the correct explanation of the Assertion.

Assertion is correct, but Reason is the wrong statement.

Assertion is wrong but Reason is the correct statement.

Assertion: Both rhombic and monoclinic sulphur exist as S 8 but oxygen exists as O 2 . Reason: Oxygen forms pπ - pπ multiple bonds due to its small size and small bond length but pπ - pπ bonding is not possible in sulphur.

Both Assertion and Reason are correct statements, and Reason is the correct explanation of the Assertion.

Both Assertion and Reason are correct statements, and Reason is not the correct explanation of the Assertion.

Assertion is correct, but Reason is wrong statement.

Both Assertion and Reason are wrong statements.

Assertion (A) SF 6 cannot be hydrolysed but SF 4 can be. Reason (R) Six F-atoms in SF 6 prevent the attack of H 2 O on sulphur atom of SF 6

Both Assertion and Reason are correct statements, and Reason is the correct explanation of the Assertion.

Both Assertion and Reason are correct statements, and Reason is not the correct explanation of the Assertion.

Assertion is correct, but Reason is the wrong statement.

Assertion is wrong but Reason is a correct statement.

Match the compounds of Xe in column I with the molecular structure in column II. Column-I Column-II (a) XeF 2 (i) Square planar (b) XeF 4 (ii) Linear (c) XeO 3 (iii) Square pyramidal (d) XeOF 4 (iv) Pyramidal

(a)-(ii) , (b)-(i) , (c)-(iv) , (d)-(iii)

(a)-(ii) , (b)-(i) , (c)-(iii) , (d)-(iv)

(a)-(ii) , (b)-(iv) , (c)-(iii) , (d)-(i)

(a)-(ii) , (b)-(iii) , (c)-(i) , (d)-(iv)

Assertion: PF 5 and IF 3 have similar shapes. Reason: All the bond lengths are equal in PF 5 .

Both Assertion and Reason are false statements.

Both Assertion & Reason are true and the reason is the correct explanation of the assertion.

Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.

Assertion is a true statement but Reason is false.

Assertion: The valency and oxidation number of sulphur in S 8 respectively are 2 and 0. Reason: S 8 Rhombic is the most stable allotropic form of sulphur.

Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.

Both Assertion & Reason are true and the reason is the correct explanation of the assertion.

Assertion is a true statement but Reason is false.

Both Assertion and Reason are false statements.

NH 3 forms a hydrogen bond but PH 3 does not because -

Nitrogen is more electronegative as compared to phosphorus.

Phosphorus is more electronegative as compared to nitrogen.

Nitrogen and phosphorous have equal electronegativity.

Nitrogen is more stable as compared to phosphorus.

Chemistry - Pblock Elements Xii - Quiz-11

Assertion: HNO₃ makes iron passive.

Reason: HNO₃ forms a protective layer of ferric nitrate on the surface of the iron.

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Both Assertion and Reason are correct statements, and Reason is the correct explanation of the Assertion.
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Both Assertion and Reason are correct statements, and Reason is not the correct explanation of the Assertion.
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Assertion is correct, but Reason is the wrong statement.
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Assertion is wrong but Reason is the correct statement.

Assertion: HI cannot be prepared by the reaction of KI with concentrated H₂SO₄.

Reason: HI has the lowest H—X bond strength among halogen acids.

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Both Assertion and Reason are correct statements, and Reason is the correct explanation of the Assertion.
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Both Assertion and Reason are correct statements, and Reason is not the correct explanation of the Assertion.
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Assertion is correct, but Reason is the wrong statement.
0%

Assertion is wrong but Reason is the correct statement.

Assertion: Both rhombic and monoclinic sulphur exist as S₈ but oxygen exists as O₂.

Reason: Oxygen forms $pπ - pπ$ multiple bonds due to its small size and small bond length but $pπ - pπ$ bonding is not possible in sulphur.

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Both Assertion and Reason are correct statements, and Reason is the correct explanation of the Assertion.
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Both Assertion and Reason are correct statements, and Reason is not the correct explanation of the Assertion.
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Assertion is correct, but Reason is wrong statement.
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Both Assertion and Reason are wrong statements.

Assertion (A) SF₆ cannot be hydrolysed but SF₄ can be.

Reason (R) Six F-atoms in SF₆ prevent the attack of H₂O on sulphur atom of SF₆

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Both Assertion and Reason are correct statements, and Reason is the correct explanation of the Assertion.
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Both Assertion and Reason are correct statements, and Reason is not the correct explanation of the Assertion.
0%

Assertion is correct, but Reason is the wrong statement.
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Assertion is wrong but Reason is a correct statement.

Match the compounds of Xe in column I with the molecular structure in column II.

Column-I Column-II

(a) XeF₂ (i) Square planar

(b) XeF₄ (ii) Linear

(d) XeOF₄ (iv) Pyramidal

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(a)-(ii) , (b)-(i) , (c)-(iii) , (d)-(iv)
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(a)-(ii) , (b)-(iv) , (c)-(iii) , (d)-(i)
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(a)-(ii) , (b)-(iii) , (c)-(i) , (d)-(iv)
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(a)-(ii) , (b)-(i) , (c)-(iv) , (d)-(iii)

Which one of the following reactions does not come under hydrolysis type reaction?

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$S i C l_{4 (l)} + 2 H_{2} O_{(l)} \to S i O_{2 (s)} + 4 H C l_{(a q)}$
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$L i_{3} N_{(s)} + 2 H_{2} O_{(l)} \to N H_{3 (g)} + 3 L i O H_{(a q)}$
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$2 F_{2 (g)} + 2 H_{2} O_{(l)} \to 4 H F_{(a q)} + O_{2 (g)}$
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$P_{4} O_{10 (s)} + 6 H_{2} O_{(l)} \to 4 H_{3} P O_{4 (a q)}$

Assertion: H₂O is the only hydride of the chalcogen family which is liquid.

Reason: Acidic nature of hydrides of the chalcogen family increases down the group.

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Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
0%

Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
0%

Assertion is a true statement but Reason is false.
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Both Assertion and Reason are false statements.

Assertion: PF₅ and IF₃ have similar shapes.

Reason: All the bond lengths are equal in PF₅.

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Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
0%

Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
0%

Assertion is a true statement but Reason is false.
0%

Both Assertion and Reason are false statements.

Assertion: Atomic size of F is smaller than that of Cl.

Reason: F-F bond is stronger than the Cl-Cl bond.

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Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
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Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
0%

Assertion is a true statement but Reason is false.
0%

Both Assertion and Reason are false statements.

Assertion: Noble gases have the highest ionization energies in their respective periods.

Reason: The outermost sub-shell of noble gases in which the electron enters is completely filled.

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Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
0%

Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
0%

Assertion is a true statement but Reason is false.
0%

Both Assertion and Reason are false statements.

Assertion: The valency and oxidation number of sulphur in S₈ respectively are 2 and 0.

Reason: S₈ Rhombic is the most stable allotropic form of sulphur.

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Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
0%

Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
0%

Assertion is a true statement but Reason is false.
0%

Both Assertion and Reason are false statements.

In which of the following arrangements the given sequence is not strictly according to the property indicated against it ?

$(1) H_{2} O < H_{2} S < H_{2} S e < H_{2} T e : i n c r e a \sin g p K_{a} v a l u e s$

$(2) N H_{3} < P H_{3} < A s H_{3} < S b H_{3} : i n c r e a \sin g a c i d i c c h a r a c t e r$

$(3) C O_{2} < S i O_{2} < S n O_{2} < P b O_{2} : i n c r e a \sin g o x i d i \sin g p o w e r$

$(4) H F < H C l < H B r < H I : i n c r e a \sin g a c i d i c s t r e n g t h$

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1
0%
2
0%
3
0%
4

Total number of bridging oxygen atoms present in $P_{4} O_{10}$ are :

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6
0%

4
0%

2
0%

5

Match List-I (substances) with List-II (processes) employed in the manufacture of the substances and select the correct option.

List –I List – II
Substances Processes
(a) Sulphuric acid (i) Haber's Process
(b) Steel (ii) Bessemer's Process
(c) Sodium carbonate (iii) Leblanc Process
(d) Ammonia (iv) Contact Process

Options :
(a) (b) (c) (d)

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(i) (ii) (iii) (iv)
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(iv) (iii) (ii) (i)
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(iv) (ii) (iii) (i)
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(i) (iv) (ii) (iii)

Which statement is wrong:

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Bond energy of F₂ > Cl₂
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Electronegativity of F > Cl
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F is more oxidizing than Cl
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Electron affinity of Cl > F

Compound that has planar structure :
2. XeOF₂

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XeF₄
0%
3. XeO₂F₂
0%
3
0%
XeO₄

Oxidation number of P in pyrophosphoric acid is :

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+ 5
0%
+ 2
0%
+ 3
0%
+ 4

A compound having two direct bonds between P and H atom is :

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$H_{3} P O_{2}$
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$H_{3} P O_{3}$
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$H_{3} P O_{4}$
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$H_{4} P_{2} O_{7}$

General behavior of $O_{3}$ is :

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Gives electrons.
0%
Gives $O_{2}$
0%
Reaction with $H_{2}$
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Accept electrons.

The correct statement among the following is: -

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Silicon exhibits 8 coordination numbers in its compound.
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Bond energy of F₂ is less than Cl₂
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Mn(III) oxidation state is more stable than Mn (II) in an aqueous state.
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Elements of 15^th gp show only + 3, and + 5 oxidation states.

Incorrect statement among the following is :

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Among halide ions, iodide is the most powerful reducing agent.
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Fluorine is the only halogen that does not show a variable oxidation state.
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HOCl is a stronger acid than HOBr
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HF is a stronger acid than HCl

In X- H ----- Y, X and Y both are electronegative elements :

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Electron density on X will increase and on H will decrease.
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In both electron density will increase.
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In both electron density will decrease.
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On X electron density will decrease and on H increases.

Nitrogen form $N_{2}$ , but phosphorous form $P_{2}$ , it's at a time convert in $P_{4}$ , reason is : -

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Triple bond present between phosphorous atom.
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$p π - p π$ bonding is weak in phosphorous.
0%
$p π - p π$ bonding is strong in phosphorous.
0%
Multiple bond form easilly phosphorous.

NH₃ forms a hydrogen bond but ${PH}_{3}$ does not because -

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Phosphorus is more electronegative as compared to nitrogen.
0%

Nitrogen is more electronegative as compared to phosphorus.
0%

Nitrogen and phosphorous have equal electronegativity.
0%

Nitrogen is more stable as compared to phosphorus.

Nitrogen exists as a diatomic molecule and phosphorus as P₄ because -

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On moving up a group, the tendency to form pπ−pπ bonds decreases.
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On moving down a group, the tendency to form pπ−pπ bonds decreases.
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On moving down a group, the tendency to form dπ−dπ bonds decreases.
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On moving up a group, the tendency to form dπ−dπ bonds decreases.

A chemical that depletes the ozone layer is -

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Sulphur
0%

Chlorofluorocarbons (CFCs)
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Nitrogen
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Hydrogen

Fluorine forms only one oxoacid, HOF because of -

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Low electronegativity and small size
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High electronegativity and small size
0%

High electronegativity and big size
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Low electronegativity and big size

Oxygen forms hydrogen bonding while chlorine does not, because-

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Chlorine has a bigger size and as a result, a higher electron density per unit volume.
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Oxygen has a smaller size and as a result, a lower electron density per unit volume.
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Oxygen has a smaller size and as a result, a higher electron density per unit volume.
0%

Oxygen has a bigger size and as a result, a higher electron density per unit volume.

The uses of ${ClO}_{2}$ is /are-

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It is used for purifying water
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It is used as a bleaching agent
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Both '1'and '2'
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None of the above

Halogens are colored because -

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They absorb radiations in the U.V region
0%

They absorb radiations in the visible region
0%

They absorb radiations in the infrared region
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They absorb radiations in the radiowaves region

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Practice Chemistry Quiz Questions and Answers

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Practice Chemistry Quiz Questions and Answers

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