The correct statement among the following regarding P 4 molecule of white phosphorus is-

It has four lone pairs of electrons.

It has 6 lone pairs of electrons.

It has four P — P single bonds.

It has three P — P single bonds.

The correct statement among the following SO 2 gas is -

It acts as bleaching agent in moist conditions.

It's molecule has linear geometry.

It's concentrated solution is used as disinfectant.

It can be prepared by the reaction of dilute H 2 SO 4 with metal sulphide.

Chemistry - Pblock Elements Xii - Quiz-10

The correct statement among the following regarding P₄ molecule of white phosphorus is-

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It has 6 lone pairs of electrons.
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It has four P — P single bonds.
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It has three P — P single bonds.
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It has four lone pairs of electrons.

The correct statement among the following SO₂ gas is -

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It acts as bleaching agent in moist conditions.
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It's molecule has linear geometry.
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It's concentrated solution is used as disinfectant.
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It can be prepared by the reaction of dilute H₂SO₄ with metal sulphide.

The correct statement among the following is -

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All the three N – O bond lengths in HNO₃ are equal.
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All P – Cl bond lenths in PCl₅ molecule in gaseous state are equal.
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P₄ molecule in white phosphorus have angular strain therefore white phosphorus is very reactive.
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PCl₅ is ionic in solid state in which anion is tetrahedral and cation is octahedral.

The correct match among the following is -

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As₂O₃ < SiO₂ < P₂O₃ < SO₂ - Basic strength.
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AsH₃ < PH₃ < NH₃- Enthalpy of vaporisation.
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S < O < Cl < F - More negative electron gain enthalpy
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H₂O > H₂S > H₂Se > H₂Te - Thermal stability

$(a) {CaF}_{2} + H_{2} {SO}_{4} \to {CaSO}_{4} + 2 HF (b) 2 HI + H_{2} {SO}_{4} \to I_{2} + {SO}_{2} + 2 H_{2} O (c) Cu + 2 H_{2} {SO}_{4} \to {CuSO}_{4} + {SO}_{2} + 2 H_{2} O (d) NaCl + H_{2} {SO}_{4} \to {NaHSO}_{4} + HCl$

Conc. H₂SO₄ is used as an oxidising reagent in above mentioned reaction is -

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a and b
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b and c
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c and d
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a and d

Match the formulas of oxides given in Column I with the type of oxide given in Column II and mark the correct option.

Column I

Column II

A. Pb₃O₄

B. N₂O

C. Mn₂O₇

D. Bi₂O₃

1. Neutral oxide

2. Acidic oxide

3. Basic oxide

4. Mixed oxide

Codes

A B C D

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1 2 3 4
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4 1 2 3
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3 2 4 1
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4 3 1 2

Match the species given in Column I with the shape given in Column II and mark the correct option.

Column I

Column II

A. Its partial hydrolysis does not change oxidation state of central atom.

B. It is used in modern diving apparatus.

C. It is used to provide inert atmosphere for filling electrical bulbs.

D. It's central atom is in sp³d²hybridisation.

1. He

2. XeF₆

3. XeF₄

4. Ar

Codes

A B C D

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1 4 2 3
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1 2 3 4
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2 1 4 3
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1 3 2 4

The bonding present in nitrogen molecule is-

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$p\pi-d\pi$
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$p\pi-p\pi$
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$d\pi-d\pi$
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Only sigma bond

The correct statement about the reactivity of group 15 elements is

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Stability of their hydrides increases down the group.
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Higher oxides are acidic in nature.
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All elements form pentahalides.
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They do not react with metals.

The element from group 15 that forms a strong bond with hydrogen is-

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N
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P
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As
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Sb

The condition that does not exist in the Haber process for manufacturing ammonia is-

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Pressure (around 200 ×10⁵ Pa)
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Temperature (700 K)
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Catalyst such as iron oxide
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Presence of inert gases

Number of moles of copper used when

(i) Copper reacts with dilute nitric acid

(ii) Copper reacts with concentrated nitric acid

are respectively:-

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1,1
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1,3
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3,1
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3,3

An element that does not have d-orbital is-

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P
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N
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As
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Bi

The least basic compound is -

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BiH₃
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AsH₃
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PH₃
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NH₃

The incorrect statement about red phosphorus is-

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It is hard and crystalline.
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It is poisonous.
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It is less reactive than white phosphorus.
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It is insoluble in water.

The element that shows the highest catenation property is-

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Phosphorus
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Nitrogen
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Antimony
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Bismuth

The gas released on heating H₃PO₃ is

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Oxygen
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Phosphine
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Hydrogen
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Water vapours

PCl₅acts as -

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Reducing agent
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Oxidising agent
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Dehydrating Agent
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None of the above.

The electron gain enthalpy values for O → O^– and O →O^2– are –141 and 702 kJ mol^-1respectively.

The correct statement about the formation of oxides is-

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Higher the electron gain enthalpy lower is lattice energy.
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Higher the electron gain enthalpy higher is lattice energy.
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Higher is the electron gain enthalpy higher is the stability of oxide.
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O^- is more stable than O₂^-

The group which contains the strongest oxidizing agent is-

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Group 15
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Group 16
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Group 17
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Group 18

Halogen that forms only one oxoacid is

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Chlorine
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Fluorine
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Bromine
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Iodine

$Xe + {PtF}_{6} \to ?$

The product of the above reaction is-

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O₂⁺[PtF₆]^-.
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XeF₄
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XeF₆
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Xe⁺[PtF₆]^-

Phosphorous has the lowest oxidation state in :

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H₃PO₃
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PCl₃
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Ca₃P₂
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POF₃

A xenon fluoride that does not exist is -

$1 . {XeF}_{4} 2 . {XeF}_{2} 3 . {XeF}_{3} 4 . {XeF}_{6}$

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1
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2
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3
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4

(a) XeF₆+ 3H₂O →

(b) XeF₆+ H₂O $\to$

The products formed in the above reactions respectively are -

$1 . {XeO}_{3}, {XeOF}_{4} 2 . {XeO}_{6}, {XeOF}_{4} 3 . {XeO}_{3}, {XeOF}_{6} 4 . {XeO}_{6}, {XeOF}_{6}$

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1
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2
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3
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4

Arrange the following in increasing order of acid strength.

HF, HCl, HBr, HI

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HCl < HBr < HI<HF
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HF < HCl < HI< HBr
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HF < HCl < HBr < HI
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HF< HBr < HI< HCl

XeF₄ is isostructural with -

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${ICl}_{4}^{-}$
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${IBr}_{2}^{-}$
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${BrO}_{3}^{-}$
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${ICl}_{3}^{-}$

The incorrect statement about noble gases is-

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The atomic radii corresponds to van der Waal’s radii.
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They have the largest size in a period.
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They are also called inert gases.
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They combine to form molecules.

In solid-state, ${PCl}_{5}$ exist as -

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Covalent solid.
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Octahedral structure.
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Ionic solid with ${[{PCl}_{6}]}^{+}$ octahedral and ${[{PCl}_{4}]}^{-}$ tetrahedral.
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Ionic solid with ${[{PCl}_{4}]}^{+}$ tetrahedral and ${[{PCl}_{6}]}^{-}$ octahedral.

Match the items of Columns I and II and mark the correct option.

Column I

Column II

A. H₂SO₄

B. CCl₃NO₂

C. Cl₂

D. Sulphur

1. Highest electron affinity

2. Chalcogen

3. Tear gas

4. Storage batteries

Codes

A B C D

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4 3 1 2
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3 4 1 2
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4 1 2 3
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2 1 3 4

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Practice Chemistry Quiz Questions and Answers

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Practice Chemistry Quiz Questions and Answers

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