Ncert Solutions Chemistry Class 11th
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Which of the following reactions is an example of use of water gas in the synthesis of other compounds?
(i) CH4(g) + H2O(g) → CO(g) + H2(g)
(ii) CO(g) + H2O(g) → CO2(g) + H2(g)
(iii) CnH2n+2 + nH2O(g) → nCO + (2n+1)H2
(iv) CO(g)+2H2(g) → CH3OH(l)
Which of the following reactions is an example of use of water gas in the synthesis of other compounds?
(i) CH4(g) + H2O(g) → CO(g) + H2(g)
(ii) CO(g) + H2O(g) → CO2(g) + H2(g)
(iii) CnH2n+2 + nH2O(g) → nCO + (2n+1)H2
(iv) CO(g)+2H2(g) → CH3OH(l)
This is a multiple choice answer as classified in NCERT Exemplar
Option (iv)
CO (g)+2H2 (g) → CH3OH (l)
The reaction shown in equation (iv) shows the synthesis of methanol from water gas.
Upvote 
Hydrogen peroxide is obtained by the electrolysis of _______.
(i) Water
(ii) Sulphuric acid
(iii) Hydrochloric acid
(iv) Fused sodium peroxide
Hydrogen peroxide is obtained by the electrolysis of _______.
(i) Water
(ii) Sulphuric acid
(iii) Hydrochloric acid
(iv) Fused sodium peroxide
This is a multiple choice answer as classified in NCERT Exemplar
Option (ii)
Sulphuric acid
2HSO4- (aq) → HO3SOOSO3H (aq) → 2HSO4- (aq)+2H+ (aq) + H2O2 (aq)
Upvote When sodium peroxide is treated with dilute sulphuric acid, we get
(i) Sodium sulphate and water
(ii) Sodium sulphate and oxygen
(iii) Sodium sulphate, hydrogen and oxygen
(iv) Sodium sulphate and hydrogen peroxide
When sodium peroxide is treated with dilute sulphuric acid, we get
(i) Sodium sulphate and water
(ii) Sodium sulphate and oxygen
(iii) Sodium sulphate, hydrogen and oxygen
(iv) Sodium sulphate and hydrogen peroxide
This is a multiple choice answer as classified in NCERT Exemplar
Option (iv)
Sodium sulphate and hydrogen peroxide.
Na2O2+dil H2SO4 → Na2SO4 → Na2SO4+H2O2
Upvote Which of the following reactions increases production of Dihydrogen from synthesis gas?
(i) CH4(g)+H2O(g) → CO(g)+3H2(g)
(ii) C(g)+H2O(g) → CO(g)+H2(g)
(iii) CO(g)+H2O(g) → CO2(g)+H2(g)
(iv) C2H6+2H2O → 2CO+5H2O
Which of the following reactions increases production of Dihydrogen from synthesis gas?
(i) CH4(g)+H2O(g) → CO(g)+3H2(g)
(ii) C(g)+H2O(g) → CO(g)+H2(g)
(iii) CO(g)+H2O(g) → CO2(g)+H2(g)
(iv) C2H6+2H2O → 2CO+5H2O
This is a multiple choice answer as classified in NCERT Exemplar
Option (iii)
CO (g)+H2O (g) → CO2 (g)+H2 (g)
The production of dihydrogen can be increased by reacting carbon monoxide of syngas mixtures with steam in the presence of iron chromate as catalyst.
Upvote Hydrogen peroxide is _________.
(i) An oxidizing agent
(ii) A reducing agent
(iii) Both an oxidizing and a reducing agent
(iv) Neither oxidizing nor reducing agent.
Hydrogen peroxide is _________.
(i) An oxidizing agent
(ii) A reducing agent
(iii) Both an oxidizing and a reducing agent
(iv) Neither oxidizing nor reducing agent.
This is a multiple choice answer as classified in NCERT Exemplar
Option (iii)
Both an oxidizing and a reducing agent
In both acidic and alkaline medium hydrogen peroxide can act as oxidizing and reducing agent.
Upvote Which of the following equations depicts the reducing nature of H2O2?
(i) 2[Fe(CN)6]4- + 2H+ + H2O2 → 2[Fe(CN)6]3- + 2H2O
(ii) I2 + H2O2 + 2OH–→ 2I-+ 2H2O + O2
(iii) Mn2+ + H2O2 → Mn4+ + 2OH
(iv) PbS + 4H2O2→ PbSO4 + 4H2O
Which of the following equations depicts the reducing nature of H2O2?
(i) 2[Fe(CN)6]4- + 2H+ + H2O2 → 2[Fe(CN)6]3- + 2H2O
(ii) I2 + H2O2 + 2OH–→ 2I-+ 2H2O + O2
(iii) Mn2+ + H2O2 → Mn4+ + 2OH
(iv) PbS + 4H2O2→ PbSO4 + 4H2O
This is a multiple choice answer as classified in NCERT Exemplar
Option (ii)
I2 + H2O2 + 2OH–→ 2I-+ 2H2O + O2
As iodine is reduced from 0 to -1.
Upvote Which of the following equations depict the oxidising nature of H2O2?
(i) 2MnO4- + 6H+ + 5H2O2 → 2Mn2+ + 8H2O + 5O2
(ii) 2Fe3+ + 2H+ + H2O2 → 2Fe2+ + 2H2O + O2
(iii) 2I- + 2H+ + H2O2 → I2+ 2H2O
(iv) KIO4 + H2O2→ KIO3 + H2O + O2
Which of the following equations depict the oxidising nature of H2O2?
(i) 2MnO4- + 6H+ + 5H2O2 → 2Mn2+ + 8H2O + 5O2
(ii) 2Fe3+ + 2H+ + H2O2 → 2Fe2+ + 2H2O + O2
(iii) 2I- + 2H+ + H2O2 → I2+ 2H2O
(iv) KIO4 + H2O2→ KIO3 + H2O + O2
This is a multiple choice answer as classified in NCERT Exemplar
Option (iii)
2I- + 2H+ + H2O2 → I2+ 2H2O
As the oxidation state of iodine changes from -1 to 0, this shows peroxide is oxidising in nature.
Upvote The oxide that gives H2O2 on treatment with dilute H2SO4 is —
(i) PbO2
(ii) BaO2 .8H2O + O2
(iii) MnO2
(iv) TiO2
The oxide that gives H2O2 on treatment with dilute H2SO4 is —
(i) PbO2
(ii) BaO2 .8H2O + O2
(iii) MnO2
(iv) TiO2
This is a multiple choice answer as classified in NCERT Exemplar
Option (ii)
BaO2 -8H2O
Hydrogen peroxide is produced by acidifying barium peroxide and eliminating excess water by evaporation under low pressure.
Upvote Consider the reactions
(A) H2O2 + 2HI → I2 + 2H2O
(B) HOCl + H2O2 → H3O+ + Cl– + O2
Which of the following statements is correct about H2O2 with reference to these reactions? Hydrogen perioxide is ________.
(i) An oxidising agent in both (A) and (B)
(ii) An oxidising agent in (A) and reducing agent in (B)
(iii) A reducing agent in (A) and oxidising agent in (B)
(iv) A reducing agent in both (A) and (B)
Consider the reactions
(A) H2O2 + 2HI → I2 + 2H2O
(B) HOCl + H2O2 → H3O+ + Cl– + O2
Which of the following statements is correct about H2O2 with reference to these reactions? Hydrogen perioxide is ________.
(i) An oxidising agent in both (A) and (B)
(ii) An oxidising agent in (A) and reducing agent in (B)
(iii) A reducing agent in (A) and oxidising agent in (B)
(iv) A reducing agent in both (A) and (B)
This is a multiple choice answer as classified in NCERT Exemplar
Option (ii)
An oxidizing agent in (A) and reducing agent in (B)
H2O2 acts as an oxidising agent in A as it oxidized iodine from -1 to 0, while in B it acts as reducing agent as it reduced chlorine from +1 to -1
Upvote Radioactive elements emit α, β and γ rays and are characterised by their halflives. The radioactive isotope of hydrogen is
(i) Protium
(ii) Deuterium
(iii) Tritium
(iv) Hydronium
Radioactive elements emit α, β and γ rays and are characterised by their halflives. The radioactive isotope of hydrogen is
(i) Protium
(ii) Deuterium
(iii) Tritium
(iv) Hydronium
This is a multiple choice answer as classified in NCERT Exemplar
Option (iii)
Tritium
The tritium concentration is about one atom per 1018 atoms of protium. Of these isotopes, only tritium is radioactive and emits low energy beta particles.
Upvote