Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 43

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IMPORTANT

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Mole fraction of $A$ in $H_{2} O$ is $0.2$ . The molality of $A$ in $H_{2} O$ is?

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Important Questions on Some Basic Concepts of Chemistry

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 44

If the compound contains

7 %

sodium,

12.8 %

nitrogen and

9.8 %

sulphur by weight, how many nitrogen and sulphur atoms are present per atom of sodium?

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Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 45

The density of

2.05 M

solution of acetic acid in water is

1.02 \frac{g}{mL}

. What is the molality of the solution?

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Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 46

What is the concentration of the solution containing

6.02 \times 10^{20}

molecules of urea in

100 mL

?

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Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 47

A solution contains

0.03659 \frac{g}{mL}

of

HCl

and another solution contains

0.04509 \frac{g}{mL}

of acetic acid, then which of the following statement is correct?

(N = normality)

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Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 48

A certain compound has the molecular formula

X_{4} O_{6}

. If

10 g

of

X_{4} O_{6}

has

5.72 g

of

X

in it. What is the atomic mass of

X

?

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Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 49

Approximately how much volume of

0.40 M Ba {(OH)}_{2}

must be added to

50.0 ml

of

0.30 M NaOH

to get a solution in which the molarity of

{OH}^{-}

ions is

0.50 M

?

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Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 50

25 mL

solution of barium hydroxide on titration with

0.1

molar solution of hydrochloric acid gave a titre value of

35 mL

. The molarity of barium hydroxide is:

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Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 51

44 g

of a sample on complete combustion, gives

88 g

of

{CO}_{2}

and

36 g

of

H_{2} O

. The molecular formula of the compound may be: