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

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IMPORTANT

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What is the concentration of the solution containing $6.02 \times 10^{20}$ molecules of urea in $100 mL$ ?

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Important Questions on Some Basic Concepts of Chemistry

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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:

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Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 52

Suppose in a compound

C, H, N

atoms are present in

9 : 1 : 3.5

by weight. The molecular weight of the compound is

108

. Its molecular formula is

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Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 53

Atomic weights of two elements

P

and

Q

are

60

and

120

respectively. If

x

grams of

P

contains

y

atoms, what is the number of atoms present in

2 x

grams of

Q

?

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 23 - Some Basic Concepts of Chemistry>Level 1>Q 54

What are the number of carbon atoms given by a young man to his bride-to-be if the engagement ring contains

0.50 carat

diamond

(1 carat = 200 mg)

?