Hydrogen Test

Result

Hydrogen Test - 3

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

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

Which acid is normally used for the laboratory preparation of dihydrogen?

A
CH₃COOH (dil)

B
HNO₃ (dil)

C
H₂SO₄ (dil)

D
HClO₄ (dil)

Solution

It is usually prepared by the reaction of granulated zinc with dilute sulphuric acid.

Zn + H₂SO₄=> ZnSO₄ + H₂
Question 2
1 / -0

Which of the following hydrides is the most powerful reducing agent?

A
HF

B
LiH

C
CH₄

D
NH₃

Solution

LiH is the most powerful reducing agent among these. Since it is an ionic hydride, H^- ion is already separate and it easily gets oxidised to form H₂ gas.
Question 3
1 / -0

How does H₂O₂react when it is added to a solution of KMnO₄ and a solution of KI, respectively?

A
It acts as an oxidising agent in both the reactions.

B
It acts as a reducing agent in both the reactions.

C
It acts as a reducing agent in the reaction with KMnO₄ and oxidising agent in that with KI.

D
It acts as an oxidising agent in the reaction with KMnO₄ and reducing agent in that with KI.

Solution

H₂O₂acts as a reducing agent and an oxidising agent when it is added to a solution of KMnO₄and a solution of KI, respectively.
As a reducing agent:
2KMnO₄ + 5H₂O₂+ 3H₂SO₄ → K₂SO₄ + 5O₂ + 2MnSO₄ + 8H₂O
As an oxidising agent:
3KI + H₂O₂ + H₂SO₄ → KI₃ + K₂SO₄ + 2H₂O
Question 4
1 / -0

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

The oxide that gives hydrogen peroxide on treatment with dilute acid is

A
PbO₂

B
Na₂O₂

C
MnO₂

D
TiO₂

Solution

Following reaction takes place in this case:

Na₂O₂ + 2HCl → H₂O₂+ 2NaCl
Question 5
1 / -0

Commercial hydrogen peroxide is stored in dark bottles, in which a trace of inhibitor ______ is added.

A
KOH

B
MnO₂

C
acetanilide

D
oxalic acid

Solution

Commercial hydrogen peroxide H₂O₂ is stored in dark bottles, in which a trace of inhibitor acetanilide is added. Both the dark bottle and acetanilide help prevent the decomposition of hydrogen peroxide.
Question 6
1 / -0

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

Identify the incorrect statement.

A
Order of reactivity is H₂ < nascent hydrogen < atomic hydrogen.

B
Hydride ion is a stronger base than hydroxide ion and hence, ionic hydrides like hydrolyth (CaH₂) are hydrolysed to give alkali and hydrogen.

C
Metallic hydrides and occluded hydrogen are produced by transition metals like palladium.

D
Hydrogen is dried by conc. H₂SO₄ and can't be used in hydrogenation of oils.

Solution

H₂SO₄ + H₂ → 2H₂O + SO₂
It is dried by P₄O₁₀ / Anhydrous CaCl₂.
Question 7
1 / -0

In which of the following properties is hydrogen different from halogens?

A
Electronic configuration

B
Ionisation enthalpy

C
Oxidation state

D
Atomicity

Solution

Electronic configuration of halogens is ns²np⁵, while hydrogen has half-filled valence shell, i.e. ns¹.
Hydrogen and halogens both have a high ionisation energy.
Hydrogen can exhibit -1 oxidation state like the halogens.
Hydrogen as well as halogens occur as diatomic molecules.
Question 8
1 / -0

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

Which of the following statements is incorrect?

A
The unique hydrogen is best placed separately in the periodic table of elements.

B
Recent reports confirm that hydrogen under very high pressure is expected to behave like a metal.

C
H⁺ has a size of 1.5 X 10^-3pm as compared to normal atomic and ionic size of 50 to 220 pm.

D
Earth possesses enough gravitational pull to retain the light H₂molecule; so it is not found in our atmosphere.

Solution

Hydrogen is found in the atmosphere.
Question 9
1 / -0

Which of the following accounts for the relatively inert behaviour of dihydrogen at room temperature?

A
It exists as nuclear spin isomers in the ratio 3 : 1.

B
Difference in melting point and thermal conductivity of nuclear isomers.

C
High enthalpy of H-H bond.

D
The tendency of hydrogen to combine with carbon, dioxygen and dinitrogen.

Solution

The relatively inert behaviour of dihydrogen at room temperature is due to high enthalpy of H-H bond, which is the highest for a single bond between any two elements (435.88 kJ).

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Hydrogen Test - 3

Result

Hydrogen Test - 3

Score

-

Rank

-

SHARING IS CARING

Question 1

CH3COOH (dil)

HNO3 (dil)

H2SO4 (dil)

HClO4 (dil)

Solution

Question 2

HF

LiH

CH4

NH3

Solution

Question 3

It acts as an oxidising agent in both the reactions.

It acts as a reducing agent in both the reactions.

It acts as a reducing agent in the reaction with KMnO4 and oxidising agent in that with KI.

It acts as an oxidising agent in the reaction with KMnO4 and reducing agent in that with KI.

Solution

Question 4

PbO2

Na2O2

MnO2

TiO2

Solution

Question 5

KOH

MnO2

acetanilide

oxalic acid

Solution

Question 6

Order of reactivity is H2 < nascent hydrogen < atomic hydrogen.

Hydride ion is a stronger base than hydroxide ion and hence, ionic hydrides like hydrolyth (CaH2) are hydrolysed to give alkali and hydrogen.

Metallic hydrides and occluded hydrogen are produced by transition metals like palladium.

Hydrogen is dried by conc. H2SO4 and can't be used in hydrogenation of oils.

Solution

Question 7

Electronic configuration

Ionisation enthalpy

Oxidation state

Atomicity

Solution

Question 8

The unique hydrogen is best placed separately in the periodic table of elements.

Recent reports confirm that hydrogen under very high pressure is expected to behave like a metal.

H+ has a size of 1.5 X 10-3 pm as compared to normal atomic and ionic size of 50 to 220 pm.

Earth possesses enough gravitational pull to retain the light H2 molecule; so it is not found in our atmosphere.

Solution

Question 9

It exists as nuclear spin isomers in the ratio 3 : 1.

Difference in melting point and thermal conductivity of nuclear isomers.

High enthalpy of H-H bond.

The tendency of hydrogen to combine with carbon, dioxygen and dinitrogen.

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

CH₃COOH (dil)

HNO₃ (dil)

H₂SO₄ (dil)

HClO₄ (dil)

CH₄

NH₃

It acts as a reducing agent in the reaction with KMnO₄ and oxidising agent in that with KI.

It acts as an oxidising agent in the reaction with KMnO₄ and reducing agent in that with KI.

PbO₂

Na₂O₂

MnO₂

TiO₂

MnO₂

Order of reactivity is H₂ < nascent hydrogen < atomic hydrogen.

Hydride ion is a stronger base than hydroxide ion and hence, ionic hydrides like hydrolyth (CaH₂) are hydrolysed to give alkali and hydrogen.

Hydrogen is dried by conc. H₂SO₄ and can't be used in hydrogenation of oils.

H⁺ has a size of 1.5 X 10^-3pm as compared to normal atomic and ionic size of 50 to 220 pm.

Earth possesses enough gravitational pull to retain the light H₂molecule; so it is not found in our atmosphere.