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KVPY Aptitude Test - Stream SA

IMPORTANT

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The molar mass of ${CaCO}_{3}$ is $100 g$ . The maximum amount of carbon dioxide that can be liberated on heating $25 g$ of ${CaCO}_{3}$ is:

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Important Questions on Mole Concept - 1

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>KVPY PROBLEMS (PREVIOUS YEARS)>Q 9

When the size of a spherical nanoparticle decreases from

30 nm

10 nm,

the ratio surface area/volume becomes:

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>KVPY PROBLEMS (PREVIOUS YEARS)>Q 10

Emulsification of

10 ml

of oil in water produces

2.4 \times 10^{18}

droplets. If the surfaces tension at the oil-water interface is

0.03 {Jm}^{- 2}

and the area of each droplet is

12.5 \times 10^{- 16} m^{2},

the energy spent in the formation of oil droplets is:

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>KVPY PROBLEMS (PREVIOUS YEARS)>Q 11

The weight of calcium oxide formed by burning

20 g

of calcium in excess oxygen is:

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>KVPY PROBLEMS (PREVIOUS YEARS)>Q 12

By dissolving

0.35

mole

of sodium chloride in water,

1.30 L

of salt solution is obtained. The molarity of the resulting solution should be reported as:

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>KVPY PROBLEMS (PREVIOUS YEARS)>Q 13

Upon mixing equal volumes of aqueous solutions of

0.1 M HCl

and

0.2 M H_{2} {SO}_{4},

the concentration of

H^{+}

in the resulting solution is:

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>KVPY PROBLEMS (PREVIOUS YEARS)>Q 14

The amount of metallic

Zn

(Atomic weight

= 65.4

) required to react with aqueous sodium hydroxide to produce

1 g

H_{2},

MEDIUM

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>KVPY PROBLEMS (PREVIOUS YEARS)>Q 15

Natural abundances of

{}^{12}C

and

{}^{13}C

isotopes of carbon are

99 %

and

1 %,

respectively. Assuming they only contributes to the molecular weight of

C_{2} F_{4},

the percentage of

C_{2} F_{4}

having a molecular mass of

101

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 1 - Mole Concept - 1>KVPY PROBLEMS (PREVIOUS YEARS)>Q 16

The volume of oxygen at

STP

required to burn

2.4 g

of carbon completely is

The molar mass of CaCO3 is 100 g. The maximum amount of carbon dioxide that can be liberated on heating 25 g of CaCO3 is:

Important Questions on Mole Concept - 1

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The molar mass of ${CaCO}_{3}$ is $100 g$ . The maximum amount of carbon dioxide that can be liberated on heating $25 g$ of ${CaCO}_{3}$ is: