The incorrect statement among the following is -

F 2 > Cl 2 > Br 2 > I 2 : Bond dissociation energy

F 2 > Cl 2 > Br 2 > I 2 : Oxidising power

F < Cl > Br > I : Electron gain enthalpy

F> Cl > Br > I : Electronegativity

Incorrect statement among the following regarding halogens is -

Chlorine has the highest electron-gain enthalpy.

All form monobasic oxyacids(except HOF).

All but fluorine show positive oxidation states.

Chemistry - Pblock Elements Xii - Quiz-8

Which of the following compound of sulphur has $- O - O -$ linkage?

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$H_{2} {SO}_{4}, sulphuric acid$
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$H_{2} S_{2} O_{8}, peroxodisulphuric acid$
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$H_{2} S_{2} O_{7}, pyrosulphuric acid$
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$H_{2} {SO}_{3}, sulphurous acid$

What are the products formed in the reaction of xenon hexafluoride with silicon dioxide?

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${XeSiO}_{4}$ +HF
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${XeF}_{2} + {SiF}_{4}$
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${XeOF}_{4} + {SiF}_{4}$
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${XeO}_{3} + {SiF}_{2}$

The mineral Clevite on heating gives:

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He
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Xe
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Ar
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Ra

The word neon signifies:

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new
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old
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strange
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none of these

An element belongs to group 15 and 3^rd period of the periodic table, its electronic configuration would be

$1 . 1 s^{2} 2 s^{2} 2 p^{4} 2 . 1 s^{2} 2 s^{2} 2 p^{3} 3 . 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2} 4 . 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3}$

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4

Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which
spontaneously burn in air giving smoky rings. A and B are respectively-

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P₄(red) and PH₃
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P₄(white) and PH₃
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S₈ and H₂S
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P₄ (white) and H₂S

Most easily liquefiable gas among the following is -

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Ar
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Ne
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Xe
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Kr

A compound among the following that is not an acidic salt is -

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${NaH}_{2} {PO}_{2}$
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${NaH}_{2} {PO}_{3}$
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${Na}_{2} H_{2} S_{2} O_{7}$
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${NaH}_{2} {PO}_{4}$

Hydrogen peroxide can by generated by hydrolysis of -

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${HNO}_{3}$
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$H_{2} P_{2} O$
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$H_{2} S_{2} O_{8}$
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$H_{2} S_{2} O_{6}$

A balanced chemical equation for the reaction showing catalytic oxidation of NH₃ by atmospheric oxygen is :

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$4 {NH}_{3} + \underset{From air}{5 O_{2}} \to_{500 K; 9 bar}^{Pt / Rh gauge catalyst} 4 NO + 6 H_{2} O$
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$3 {NH}_{4} + \underset{From air}{5 O_{2}} \to_{500 K; 9 bar}^{Pt / Rh gauge catalyst} 3 NO + 6 H_{2} O$
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$4 {NH}_{3} + \underset{From air}{5 O_{2}} \to_{c o l d}^{no catalyst} 4 NO + 6 H_{2} O$
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$3 {NH}_{4} + \underset{From air}{5 O_{2}} \to_{c o l d}^{no catalyst} 3 NO + 6 H_{2} O$

The structure of pyrophosphoric acid among the following is -

1.		2.
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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