Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 94

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How many moles of $Zn ({FeS}_{2})$ can be made from $2$ moles zinc, $3$ moles iron and $5$ moles sulphur?

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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 95

The maximum number of molecules is present in

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 96

There are $6 . 02 \times 10^{22}$ molecules each of $N_{2}, O_{2} and H_{2}$ which are mixed together at $760 mm$ and $273 K$ . The mass of the mixture in grams is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 97

A bottle of cold drink contains 200 mL liquid in which

C O_{2}

is 0.1 molar. Suppose

C O_{2}

behaves like an ideals gas, the volume of the dissolved

C O_{2}

at STP is

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

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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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]