Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 98

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Earn 100

Assuming petrol is isooctane $(C_{8} H_{18})$ and has a density of $0.8 {gmm}^{- 1} . 1.425$ litres of petrol on complete combustion will consume.

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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 1>Q 99

Which of the following relations is incorrect for solutions?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 100

How many millilitres of

0.1 N H_{2} {SO}_{4}

solution will be required for complete reaction with a solution containing

0.125 g

of pure

{Na}_{2} {CO}_{3}

:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 101

The temporary hardness is due to the bicarbonates of

{Mg}^{2 +}

and

{Ca}^{2 +}

. It is removed by the addition of

CaO

as follows:

Ca {({HCO}_{3})}_{2} + CaO ⟶ 2 {CaCO}_{3} + H_{2} O

. The mass of

CaO

required to precipitate

2 g {CaCO}_{3}

is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 102

A

0.200 g

sample of benzoic acid,

C_{6} H_{5} COOH

, is titrated with a

0.120 M Ba (OH)_{2}

solution. What volume of the

Ba (OH)_{2}

solution is required to reach the equivalence point?

[C_{6} H_{5} COOH, Molar Mass = 122.1 g mol - 1]

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 103

8 g NaOH

is dissolved in one litre of solution, its molarity is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 104

A

500 g

toothpaste sample has

0.02 g

fluoride concentration. What is the concentration of fluorine in terms of ppm level?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 105

Mole fraction of ethanol in ethanol water mixture is

0.25

. Hence, the percentage concentration of ethanol by weight of the mixture is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 106

What is the molarity of

HCl

in a solution prepared by dissolving

5.5 g HCl

in

200 g

ethanol if the density of the solution is

0.79 {gmL}^{- 1} ?