Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 10

HARD

11th CBSE

IMPORTANT

Earn 100

What mass of iodine is liberated from a solution of potassium iodide when $1 liter$ of chlorine gas at $10 ° C$ and $750 mm$ pressure is passed through it?

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 11

1.4 g

of a sample of chalk (

{CaCO}_{3}

) containing clay as impurity were treated with excess of dilute hydrochloric acid. Volume of

{CO}_{2}

evolved when measured at

15 ° C

and

0.952 liter

pressure was

282 {cm}^{3}

. Calculate the percentage purity of the sample.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 12

How much marble of

96.5 %

purity would be required to prepare

∴ 0.952 L

of carbon dioxide at STP when the marble is acted upon by dilute hydrochloric acid?

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 13

Calculate the volume of

{SO}_{2}

at STP obtained by burning

500 g

of

containing

= 10.79 g

sand by weight.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 14

2.50 g

sample of sodium bicarbonate when strongly heated gave

300 {cm}^{3}

of

{CO}_{2}

measured at

27 ° C

and

760 mm

pressure. Calculate the percentage purity of the sample.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 15

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.

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

5.6

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.