Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 3

HARD

11th CBSE

IMPORTANT

Earn 100

Calculate the mass of $60 %$ $H_{2} {SO}_{4}$ required to decompose $50 g$ of chalk (calcium carbonate).

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 4

Which is cheaper:

40 %

hydrochloric acid at the rate of

50

paise per kilogram or

80 %

H_{2} {SO}_{4}

at the rate of

25

paise per kilogram to completely neutralize

7 kg

of caustic potash

?

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 5

Excess of

{AgNO}_{3}

solution was added to

2.2 g

of commercial sample of common salt dissolved in water. The mass of dried precipitate of silver chloride was

2.11 g

. Calculate the percent purity of common salt.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 6

A sample of dolomite contained

45 %

of

{CaCO}_{3}

,

40 %

of

{MgCO}_{3}

and

15 %

clay. Calculate the mass of sulphuric acid of

30 %

strength required to react completely with

10 g

of the sample.

HARD

11th CBSE

IMPORTANT

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

Calculate the mass of graphite that must be burnt to produce

13.2 g

of

{CO}_{2}

.

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.