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Mole Concept And Stoichiometry Chemistry - Mole Concept And Stoichiometry

ICSE - STD 10 - Chemistry (ICSE - English Medium). 181 questions in this chapter.

Question types

Mole Concept And Stoichiometry question types

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

181
Questions
6
Question groups
5
Question types
Sample Questions

Mole Concept And Stoichiometry questions

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

Q 1MCQ1 Mark
A gas cylinder of capacity of $20dm^3$ is filled with gas $X$ the mass of which is $10g.$ When the same cylinder is filled with hydrogen gas at the same temperature and pressure the mass of the hydrogen is $2g,$ hence the relative molecular mass of the gas is :
  • A
    $5$
  • ✓
    $10$
  • C
    $15$
  • D
    $20$

Answer: B.

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Q 2MCQ1 Mark
Choose the correct alternative :
The gas laws which relates the volume of a gas to the number of molecules of the gas is :
  • A
    Avogadro's law
  • B
    Gay-Lussac's law
  • C
    Boyle's law
  • D
    Charle's law
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Q 3MCQ1 Mark
The ratio between the number of molecules in $2g$ of hydrogen and $32 g$ of oxygen is $[$Given that $H=1,O=16]$
  • A
    $1:2$
  • B
    $1:0:01$
  • ✓
    $1:1$
  • D
    $0.01:1$

Answer: C.

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Q 4MCQ1 Mark
Which of the following would weight the least? $[$Atomic masses : $Ag = 108, N - 14, O = 16,C = 12]$
  • A
    $2$ gram atoms of Nitrogen
  • B
    $1 \ mole$ of Silver
  • C
    $22.4$ litres of oxygen gas at $1 $ atmospheric pressure and $273 K$
  • ✓
    $6.02 \times 10^{23}$ atoms of carbon

Answer: D.

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Q 6[2 Mark Question Answer]2 Marks
A gas cylinder contains $24 \times 10^{24}$ molecules of nitrogen gas. If Avogadro's number is $6 \times 10^{23}$ and the relative atomic mass of nitrogen is $14,$ Calculate : Volume of nitrogen at $ \text{STP}$ in $dm^3.$
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Q 7[2 Mark Question Answer]2 Marks
A gas cylinder contains $24 \times 10^{24}$ molecules of nitrogen gas. If Avogadro's number is $6 \times 10^{23}$​​​​​​​ and the relative atomic mass of nitrogen is $14,$​​​​​​​
Calculate : Mass of nitrogen gas in the cylinder.
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Q 9[2 Mark Question Answer]2 Marks
The equation for the burning of octane is :
$2C_8H_{18} + 25O_{2 }\rightarrow 16CO_2 + 18H_2O$
If the relative molecular mass of carbon dioxide is $44,$ what is the mass of carbon dioxide produced by burning two $moles$ of octane?
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Q 13[3 Mark Question Answer]3 Marks
4.5 moles of calcium carbonate are reacted with dilute hydrochloric acid.What is the mass of 4.5 moles of calcium carbonate? Relative molecular mass of calcium carbonate is 100)
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Q 19[1 Mark Question Answer]1 Mark
The volumes of gases A, B, C and D are in the ratio, 1:2:2:4 under the same conditions of temperature and pressure.
If this ratio of gas volumes refers to the reactants and products of a reaction, which gas law is being observed?
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Q 26[5 Mark Question Answer]5 Marks
$(i)$ A compound has the following percentage composition by mass $: C$ is $14\%, H$ is $1.2\%$ and $Cl$ is $84.5\%$
Determine the empirical formula of this compound.
$(ii)$ The relative molecular mass of this compound is $168,$ so what is its molecular formula?
$(iii)$ By what type of reaction could this compound be obtained from ethylene?
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Q 27[5 Mark Question Answer]5 Marks
The reaction of potassium permanganate $(VII)$ with acidified iron $(II)$ sulphate is given below :
$2KMno_4 + 10FeSO_4 + 8H_2O \rightarrow K_2SO_4 + 2MnSO_4 + 5Fe2(SO_4)_3 + 8H_2O$
If $15.8g$ of potassium permanganate $(VII)$ was used in the reaction, calculate the mass of iron $(II)$ sulphate used in the above reaction.
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Q 28[5 Mark Question Answer]5 Marks
The gases hydrogen, oxygen, carbon dioxide, sulphur dioxide and chlorine are arranged in order of their increasing relative molecular mass. Given $8 g$ of each gas at $\text{STP},$ which gas will contain the least number of molecules and which gas the most?
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Q 29[5 Mark Question Answer]5 Marks
A metal $M,$ forms a volatile chloride containing $65.5\%$ Chlorine. If the density of the chloride relative to hydrogen is $162.5,$ find the molecular formula of the chloride. $[M = 56, Cl = 35.5]$
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