Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>TEST YOUR GRIP>Q 5

MEDIUM

11th CBSE

IMPORTANT

Earn 100

The number of atoms in $0.1 mol$ of a triatomic gas is $(N_{A} = 6.02 \times 10^{23} {mol}^{- 1})$

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Important Questions on Some Basic Concepts of Chemistry

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>TEST YOUR GRIP>Q 6

One mole of

{CO}_{2}

contains

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>TEST YOUR GRIP>Q 7

The molecular weight of

O_{2}

and

{SO}_{2}

are

32

and

64

respectively. If one litre of

O_{2}

at

15 ° C

and

750 mm

contains

N

molecules, the number of molecules in two litres of

{SO}_{2}

under the same conditions of temperature and pressure will be

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>TEST YOUR GRIP>Q 8

Which of the following has the smallest number of molecules?

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>TEST YOUR GRIP>Q 9

How much of

NaOH

is required to neutralise

1500 {cm}^{3}

of

0.1 N

HCl ? (Na = 23)

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>TEST YOUR GRIP>Q 10

The volume of water to be added to

100 {cm}^{3}

of

0.5 N

H_{2} {SO}_{4}

to get decinormal concentration is

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>TEST YOUR GRIP>Q 11

Haemoglobin contains

0.33 %

of iron by weight. The molecular weight of haemoglobin is approximately

67200

. The number of iron atoms (at wt. of

Fe = 56

) present in one molecule of haemoglobin is

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>TEST YOUR GRIP>Q 12

Two elements

X

(atomic weight

= 75

) and

Y

(atomic weight

= 16

) combine to give a compound having

75.8 %

of

X

. The formula of the compound is

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>TEST YOUR GRIP>Q 13

100 ml

of

{PH}_{3}

on heating forms

P

and

H_{2}

. The volume change in the reaction is