Find out the volume of Cl 2 at STP produced by the action of 100 cm 3 of 0 . 2 N HCl on excess of MnO 2 .

The balanced reaction between HCl and MnO 2 is following, MnO 2 + 4 HCl 4 × 36 . 5 → MnCl 2 + 2 H 2 O + Cl 2 22400 cm 3 at STP Normality = weight of solute g × 1000 volume of solvent × Eq . Wt . of solute N = W × 1000 V mL × Eq . Wt ⋯ ⋯ ⋯ ⋯ ⋯ ( i ) And Eq . Wt . = Molar mass n f ⋯ ⋯ ⋯ ⋯ ⋯ ( ii ) Where n f is number of H + or OH - replaced by one mole of acid or base in a reaction. From the equation i and ii , 0 . 2 = W × 1000 100 × 36 . 5 1 W = 0 . 2 × 100 × 36 . 5 1000 W = 0 . 73 g ∵ 4 × 36 . 5 g of HCl produced = 22400 cm 3 of Cl 2 at STP ∴ 0 . 73 g of HCl will produce = 22400 4 × 36 . 5 × 0 . 73 cm 3 = 112 cm 3 of Cl 2 at STP

HARD

11th CBSE

IMPORTANT

Earn 100

$10 mL$ of liquid carbon disulphide (sp. Gravity $2.63$ ) is burnt in oxygen. Find the volume of the resulting gases measured at S.T.P.

Important Questions on Some Basic Concepts of Chemistry

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 16

The drain cleaner, Drainex contains small bits of aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at

20 ° C

and one bar will be released when

0.15 g

of aluminium reacts?

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 17

= \frac{67.2 \times 26.3}{76}

litres of methane

({CH}_{4})

gas are ignited in oxygen gas. Calculate the number of moles of

{CO}_{2}

formed.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 18

Calculate the volume of air containing

21 %

oxygen by volume at STP required to convert

294 {cm}^{3}

of sulphur dioxide to sulphur trioxide under the same conditions.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 19

What volume of a solution of

HCl

containing

73

g/litre would suffice for the exact neutralization of

NaOH

obtained by allowing

0.46 g

of metallic sodium to react with water.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 20

Find out the volume of

{Cl}_{2}

at STP produced by the action of

100 {cm}^{3}

0.2 N HCl

on excess of

{MnO}_{2}

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 21

A mixture of ethane

(C_{2} H_{6})

and ethene

(C_{2} H_{4})

occupies

40

litres at

1.00

atm and at

400

K. The mixture reacts completely with

130

g of

O_{2}

to produce

{CO}_{2}

and

H_{2} O

. Assuming ideal gas behavior, calculate the mole fractions of

C_{2} H_{4}

and

C_{2} H_{6}

in the mixture.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 1

5.0

g of marble was added to

7.5

g dilute hydrochloric acid. After the reaction was over, it was found that

0.5

g of marble was left unused. Calculate the percentage strength of hydrochloric acid. What volume of

{CO}_{2}

measured at STP will be evolved in the above reaction?

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 2

Calculate the volume of

1.00

mol L^-1 aqueous sodium hydroxide solution that is neutralized by

200

mL of

2.00

mol L^–1 aqueous hydrochloric acid and mass of sodium chloride produced.

10 mL of liquid carbon disulphide (sp. Gravity 2.63) is burnt in oxygen. Find the volume of the resulting gases measured at S.T.P.

Important Questions on Some Basic Concepts of Chemistry

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$10 mL$ of liquid carbon disulphide (sp. Gravity $2.63$ ) is burnt in oxygen. Find the volume of the resulting gases measured at S.T.P.