ALL IN ONE ISC Chemistry CLASS 11>Chapter 1 - Some Basic Concepts of Chemistry>Chapter Practice>Q 11

EASY

11th ICSE

IMPORTANT

Earn 100

Calculate the mass of a molecule of carbon dioxide ( ${}^{14}{CO}_{2}$ )?

Important Questions on Some Basic Concepts of Chemistry

MEDIUM

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 1 - Some Basic Concepts of Chemistry>Chapter Practice>Q 12

The molality and molarity of a solution of sulphuric acid are

4.13 mol / kg

and

11.12 mol / L

respectively. Calculate density of the solution.

MEDIUM

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 1 - Some Basic Concepts of Chemistry>Chapter Practice>Q 13

The “star of India” sapphire weighs

563

carats. If one carat is equal to

200 mg

, what is the mass of the gemstone in gram?

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IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 1 - Some Basic Concepts of Chemistry>Chapter Practice>Q 14

Give one experiment involving a chemical reaction to prove that the law of conservation of mass is true.

HARD

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 1 - Some Basic Concepts of Chemistry>Chapter Practice>Q 15

Naphthalene (compound of

C

and

H

) contain

93.71 %

carbon. If its molar mass is

128 g {mol}^{- 1}

, calculate its molecular formula.

MEDIUM

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IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 1 - Some Basic Concepts of Chemistry>Chapter Practice>Q 16

What volume of oxygen at STP can be produced by $6.125 g$ of potassium chlorate according to the reaction,

$2 {KClO}_{3} ⟶ 2 KCl + 3 O_{2}$ ?

MEDIUM

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IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 1 - Some Basic Concepts of Chemistry>Chapter Practice>Q 17

Calculate the number of gram of

{SO}_{2}

which can be prepared by the treatment of

100 g

of

{Na}_{2} {SO}_{3}

with

HCl

.

EASY

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 1 - Some Basic Concepts of Chemistry>Chapter Practice>Q 18

A gold coloured metal object has a mass of

365 g

and a volume of

22.12 {cm}^{3}

. Is the object composed of pure gold?

MEDIUM

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IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 1 - Some Basic Concepts of Chemistry>Chapter Practice>Q 19

$0.5$ mole each of $H_{2} S$ and ${SO}_{2}$ mixed together in a reaction flask, react according to equation:

$2 H_{2} S + {SO}_{2} ⟶ 2 H_{2} O + 3 S$

Calculate the number of moles of $S$ formed.