Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 25

MEDIUM

11th CBSE

IMPORTANT

Earn 100

$9.7 \times 10^{17}$ atoms of iron weight as much as $1 cc$ of $H_{2}$ at $STP$ what is the atomic mass of iron?

Important Questions on Some Basic Concepts of Chemistry

EASY

11th CBSE

IMPORTANT

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

What is the mass percent of the solute in the solution obtained by dissolving

5 g

of the solute in

50 g

of water?

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 2

A sample of

NaOH

weighing

0.40 g

is dissolved in water and the solution is made to

50.0 {cm}^{3}

in volumetric flask. What is the molarity of the resulting solution?

MEDIUM

11th CBSE

IMPORTANT

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

How many moles and how many grams of sodium chloride (

NaCl

) are present in

250 {cm}^{3}

of a

0.500 M NaCl

solution?

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 4

Concentrated aqueous sulphuric acid is

98 %

H_{2} {SO}_{4}

by mass and has a density of

1.84 g {cm}^{- 3}

. What volume of the concentrated acid is required to make

5.0 L

of

0.500 M

H_{2} {SO}_{4}

solution?

MEDIUM

11th CBSE

IMPORTANT

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

How many grams of barium chloride ( ${BaCl}_{2}$ ) are needed to prepare $100 {cm}^{3}$ of $0.250 M$ ${BaCl}_{2}$ solution?

Note: the question is given as it is in the book.

MEDIUM

11th CBSE

IMPORTANT

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

How many moles and how many grams of sodium chloride (

NaCl

) are present in

250 mL

of a

0.50 M

NaCl

solution?

MEDIUM

11th CBSE

IMPORTANT

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

A sample of

{NaNO}_{3}

weighing

0.38 g

is placed in a

50.0 mL

measuring flask. The flask is then filled with water up to the mark on the neck. What is the molarity of the solution?

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 1 - Some Basic Concepts of Chemistry>PROBLEMS FOR PRACTICE>Q 8

In a reaction vessel,

0.184 g

of

NaOH

is required to be added for completing the reaction. How many millilitres of

0.150 M NaOH

solution should be added for this requirement?