p-Block Elements Test

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p-Block Elements Test - 15

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Weekly Quiz Competition

Question 1
1 / -0

Directions For Questions

The following question has four choices out of which ONLY ONE is correct.

...view full instructions

Which one of the following gases has the highest solubility in water?

A
Fluorine

B
Ammonia

C
Methane

D
Carbon dioxide

Solution

Ammonia is polar and will have the highest solubility in water as water is also polar in nature.
Question 2
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A gas X with disagreeable odour reduces silver nitrate solution to give metallic silver and is itself oxidised to Y. Y is a dibasic acid with reducing properties. It is slowly oxidised in air to a tribasic acid Z. Though Z is a tribasic acid, it behaves in aqueous solution mostly as a dibasic acid. When a mixture of X and N₂O is subjected to electric spark, Z is obtained.

Y is

A
H₃PO₃

B
H₃PO₄

C
H₂SO₃

D
H₂CO₃

Solution

It is a dibasic acid with reducing property and is produced during the reduction of silver nitrate by phosphine.
Question 3
1 / -0

Directions For Questions

The following question has four choices, out of which ONLY ONE is correct.

...view full instructions

Xe and F₂ heated in molar ratio 1 : 20 at 400^oC give a compound X. X reacts slowly with atmospheric moisture to give Y and HF. When X reacts with small quantity of water, we get a product Z. Z can also be obtained by the interaction of X with silica. Y reacts with X to give Z. But Y and Z react to give XeO₂F₂.

The compound X is

A
XeF₂

B
XeF₄

C
XeF₆

D
XeF₈

Solution

Xe and F react in the ratio 1 : 20 to give XeF₆. It undergoes slow hydrolysis to give XeO₃.
XeF₆ + 6H₂O → XeO₃ + 6HF
Question 4
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When nitric acid is reduced by a metal, a coloured gas is formed. Identify the colour and the gas formed.

A
White, N₂O

B
Blue, N₂O₃

C
Brown, NO₂

D
Red, NO

Solution

Reduction of concentrated nitric acid by a metal (such as copper).
4HNO₃ + Cu → Cu(NO₃)₂ + 2NO₂ + 2H₂O

Copper is oxidized by concentrated nitric acid, HNO₃, to produce Cu²⁺ ions; the nitric acid is reduced to nitrogen dioxide, a poisonous brown gas with an irritating odour.
Question 5
1 / -0

PCl₅ is possible but NCl₅ does not exist because

A
in N, d-subshell is absent

B
ionization enthalpy of N is very high

C
the chemical nature of N and Cl is different

D
None of these

Solution

NCl₅ does not exist because in N, d-subshell is absent.
Question 6
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Oxide of which of the following metals gives oxygen on moderate heating?

A
Mercury

B
Copper

C
Zinc

D
Aluminium

Solution

2HgO → 2Hg (l) + O₂
Question 7
1 / -0

Choose the product(s) formed when sulphur trioxide is heated with heavy water.

A
Deuteron sulphuric acid

B
Deuterium sulphurous acid

C
Deuterium and sulphuric acid

D
None of the above

Solution

SO₃ + D₂O → D₂SO₄
Question 8
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Directions For Questions

In the question given below are two statements labelled as Assertion (A) and Reason (R). Read the statements and choose the correct option.

...view full instructions

Assertion (A): Molecular nitrogen is less reactive than molecular oxygen.
Reason (R): The bond length of N₂ is shorter than that of oxygen.

A
Both A and R are true and R is the correct explanation of A.

B
Both A and R are true, but R is not the correct explanation of A.

C
A is true, but R is false.

D
A is false, but R is true.

Solution

As the bond length of N₂ is shorter than that of oxygen, it is more difficult to break its bond than that of oxygen. So, molecular nitrogen is less reactive than molecular oxygen.
Question 9
1 / -0

Moist iodine is oxidized by ozone into which of the following compounds?

A
I₂O₅

B
IO₃^-

C
HIO₃

D
HI

Solution

I₂ + 5O₃ + H₂O → 2HIO₃ + 5O₂

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Re-Attempt Weekly Quiz Competition

p-Block Elements Test - 15

Result

p-Block Elements Test - 15

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SHARING IS CARING

Question 1

Fluorine

Ammonia

Methane

Carbon dioxide

Solution

Question 2

H3PO3

H3PO4

H2SO3

H2CO3

Solution

Question 3

XeF2

XeF4

XeF6

XeF8

Solution

Question 4

White, N2O

Blue, N2O3

Brown, NO2

Red, NO

Solution

Question 5

in N, d-subshell is absent

ionization enthalpy of N is very high

the chemical nature of N and Cl is different

None of these

Solution

Question 6

Mercury

Copper

Zinc

Aluminium

Solution

Question 7

Deuteron sulphuric acid

Deuterium sulphurous acid

Deuterium and sulphuric acid

None of the above

Solution

Question 8

Both A and R are true and R is the correct explanation of A.

Both A and R are true, but R is not the correct explanation of A.

A is true, but R is false.

A is false, but R is true.

Solution

Question 9

I2O5

IO3-

HIO3

HI

Solution

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H₃PO₃

H₃PO₄

H₂SO₃

H₂CO₃

XeF₂

XeF₄

XeF₆

XeF₈

White, N₂O

Blue, N₂O₃

Brown, NO₂

I₂O₅

IO₃^-

HIO₃