Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 50

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Which of the following has least mass:

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Important Questions on Some Basic Concepts of Chemistry

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 51

The density of air at

STP

is

0.0013 {gmL}^{- 1}

. Its vapour density is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 52

0.32 g

of a metal on treatment with an acid gave

112 mL

of hydrogen at

NTP

. Calculate the equivalent weight of the metal.

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 53

3.0

molal

NaOH

solution has a density of

1.110 g / mL

. The molarity of the solution is :

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 54

Equal moles of

H_{2} O

and

NaCl

are present in a solution. Hence, molarity of

NaCl

solution is :

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 55

The equilibrium

N_{2} (g) + O_{2} (g) ⇌ 2 NO (g)

is established in a reaction vessel of

2.5 L

capacity. The amounts of

N_{2}

and

O_{2}

taken at the start were respectively

2

moles and

4

moles. Half a mole of nitrogen has been used up at equilibrium. The molar concentration of nitric oxide is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 56

5

moles of

{SO}_{2}

and

5

moles of

O_{2}

are allowed to react to form

{SO}_{3}

in a closed vessel. At the equilibrium stage,

60 %

{SO}_{2}

is used up. The total number of moles of

{SO}_{2}

,

O_{2}

and

{SO}_{3}

in the vessel now is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 4>Q 1

The molarity of

H_{2} {SO}_{4}

solution, which has a density

1.84 g / cc

at

35 ° C

and contains

98 %

, by weight is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 4>Q 2

10^{21}

molecules are removed from

200 mg

of

{CO}_{2}

. The moles of

{CO}_{2}

left are: