Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 7

HARD

11th CBSE

IMPORTANT

Earn 100

Calculate the mass of graphite that must be burnt to produce $13.2 g$ of ${CO}_{2}$ .

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 8

One gram of a mixture of potassium and sodium chlorides on treatment with excess of silver nitrate gave

2 g

of

AgCl

. What was the composition of the two salts in the original mixture?

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 9

What volume of oxygen at

18 ° C

and

750 mm

pressure can be obtained from

10 g

potassium chlorate?

HARD

11th CBSE

IMPORTANT

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

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?

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

768 mm

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

10 liters

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

S

containing

4 %

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.