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Hydrogen CHEMISTRY - Hydrogen

ICSE - STD 8 - CHEMISTRY (ICSE - English Medium). 35 questions in this chapter.

Question types

Hydrogen question types

35 questions across 6 question groups — pick any mix to generate a CHEMISTRY paper with step-by-step answer keys.

35
Questions
6
Question groups
5
Question types
Sample Questions

Hydrogen questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 11[3 Mark Question Answer]3 Marks
With reference to the equation: $\ce{Cl_2 + H_2S \rightarrow 2HCl + S}$ pertaining to a redox reaction $-$ select the correct answer
in each case $-$
$(a)$ Chlorine is oxidised/redcued to $\ce{HCl}$.
$(b)$ Hydrogen sulphide is oxidised$/$redcued to sulphur since the reaction involves addition$/$removal of hydrogen.
$(c)$ Chlorine acts as an oxidising$/$reducing agent.
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Q 12[3 Mark Question Answer]3 Marks
With reference to the uses of hydrogen, give reasons for the following :
$(a)$ Hydrogen is not used in air balloons
$(b)$ A mixture of hydrogen $\&$ oxygen on burning, find application in welding $\&$ cutting metals
$(c)$ Reaction of hydrogen with nitrogen under specific conditions finds industrial utility.
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Q 14[3 Mark Question Answer]3 Marks
Starting from hydrogen gas how would you obtain
$(a)$ A neutral liquid
$(b)$ A basic gas
$(c)$ A metal by reduction of its heated oxide. $[$The metal formed is above iron in the activity series$]$
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Q 16[5 Mark Question Answer]4 Marks
Starting from zinc how would you obtain hydrogen using $– (a)$ Steam $(b)$ A dilute acid $(c)$ An alkali $[$Give balanced equations for each $\&$ name the product formed in each case other than hydrogen$]$. Name a metal which will not react with the reactants above to give hydrogen.
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Q 17MCQ1 Mark
The metallic compound formed when a metal above aluminium in the activity series reacts with steam.
  • ✓
    Magnesium oxide
  • B
    Nickel
  • C
    Sodium
  • D
    Iron

Answer: A.

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Q 18MCQ1 Mark
The metal which reacts with steam liberating hydrogen $\&$ the reaction is reversible.
  • A
    Sodium
  • B
    Nickel
  • ✓
    Iron
  • D
    Magnesium oxide

Answer: C.

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Q 19MCQ1 Mark
The metal used as a catalyst in hydrogenation of oils.
  • A
    Sodium
  • ✓
    Nickel
  • C
    Iron
  • D
    Magnesium oxide

Answer: B.

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Q 20MCQ1 Mark
The metallic compound used as a catalyst in Bosch process.
  • A
    Magnesium oxide
  • B
    Nickel
  • ✓
    Iron
  • D
    Sodium

Answer: C.

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Q 21MCQ1 Mark
A metal which reacts with water to give a metallic hydroxide $\&$ liberate hydrogen.
  • ✓
    Sodium
  • B
    Magnesium oxide
  • C
    Iron
  • D
    Iron [III] oxide

Answer: A.

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Q 22Match The Following.4 Marks
List $-I$ List $-II$
$1.$ An atom of hydrogen $D:$ One electron
$2.$ A strong oxidising agent $E:$ Dilute nitric acid
$3.$ A promoter used ¡n Bosch process $A:$ Chromic oxide
$4.$ A chemical used in the manufacture of fertilizers $B:$ Ammonia
  $C:$ Iron
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