Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>EXERCISE>Q 3

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IMPORTANT

Earn 100

Which of the following contains the greatest number of atoms?

30% studentsanswered this correctly

Important Questions on Mole Concept - 1

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>EXERCISE>Q 4

A gaseous mixture contains

{CO}_{2} (g)

and

N_{2} O (g)

in

2 : 5

ratio by mass. The ratio of the number of molecules of

{CO}_{2} (g)

and

N_{2} O (g)

is:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>EXERCISE>Q 5

A sample of aluminium has a mass of

54.0 g

. What is the mass of the same number of magnesium atoms? (atomic weight of

Al = 27, Mg = 24)

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>EXERCISE>Q 6

The weight of a molecule of the compound

C_{60} H_{22}

is:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>EXERCISE>Q 7

Density of ozone relative to methane under the same temperature and pressure conditions is:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>EXERCISE>Q 8

Vapour density of a gas if its density is

0.178 g / L

at

NTP

is:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>EXERCISE>Q 9

A nugget of gold and quartz was found to contain

' x' g

of gold and

' y' g

of quartz and has density

d

. If the densities of gold and quartz are

d_{1}

and

d_{2}

, respectively then the correct relation is:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>EXERCISE>Q 10

The atomic weights of two elements

A

and

B

are

40

and

80

, respectively. If

' x' g

of

A

contains

y

atoms, how many atoms are present in

' 2 x' g

of

B

?

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>EXERCISE>Q 11

The empirical formula of a compound of molecular mass

120

is

{CH}_{2} O

. The molecular formula of the compound is: