Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 16

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Earn 100

$22.4 L$ of water vapour at NTP when condensed to water, occupies an approximate volume of:
(Given: Density of water = $1 g {ml}^{- 1}$ )

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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 17

The density of liquid mercury is $13.6 g / {cm}^{3}$ . How many moles of mercury are there in $1 L$ of the metal?

(Atomic mass of $Hg = 200 g / mol$ )

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 18

A compound

X

and

Y

have equal mass of them. If their atomic weights are

30

and

20

, respectively. The molecular formula of that compound (its mol. wt. is

120

) could be:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 19

1

litre of a hydrocarbon weighs as much as one litre of

{CO}_{2}

at same

P

and

T

. Then the molecular formula of the hydrocarbon is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 20

64 g

of an organic compound has

24 g

of carbon and

8 g

of hydrogen and the rest is oxygen. The empirical formula of the compound is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 21

Cystine has a sulphur content of

26.7 %

. If its molecule contains two atoms of sulphur, what is its molecular weight?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 22

Percentage of

Se

in peroxidase anhydrous enzyme is

0.5 %

by weight (at. wt.

= 78.4

), then minimum molecular weight of peroxidase anhydrous enzyme is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 23

The hydrated salt

{Na}_{2} {SO}_{4} \cdot {nH}_{2} O

loses all water of crystallization on heating and is reduced to

44.1 %

of its original weight. Therefore, the value of n is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 24

Sulphur trioxide is prepared by the following two reactions:

$\begin{array}{l} S_{8} (s) + 8 O_{2} (g) \to 8 {SO}_{2} (g) \\ 2 {SO}_{2} (g) + O_{2} (g) \to 2 {SO}_{3} (g) \end{array}$

How many grams of ${SO}_{3}$ are produced from $1 mol$ of $S_{8}$ ?