Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 4>Q 41

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The density (in $g {mL}^{- 1}$ ) of a $3.60 M$ sulphuric acid solution that is $29 % (H_{2} {SO}_{4}$ molar mass $= 98 g {mol}^{- 1})$ by mass will be

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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 4>Q 42

The molality of a urea solution in which

0.0100 g

of urea

[{({NH}_{2})}_{2} CO]

is added to

0.3000 {dm}^{3}

of water at STP is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 4>Q 43

The density of a solution prepared by dissolving

120 g

of urea (mol. mass

= 60 u

) in

1000 g

of water is

1.15 g / mL .

The molarity of this solution is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 4>Q 44

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is $1 : 4$ The ratio of the number of their molecule is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 4>Q 45

The molecular formula of a commercial resin used for exchanging ions in water softening is $C_{8} H_{7} {SO}_{3} Na$ (Mol. wt. $206$ ). What would be the maximum uptake of ${Ca}^{2 +}$ ions by the resin when it is expressed in mole per gram resin?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 4>Q 46

The most abundant elements by mass in the body of a healthy human adult are: Oxygen

(61.4 %)

, Carbon

(22.9 %)

, Hydrogen

(10.0 %)

; and Nitrogen

(2.6 %)

. How much weight will a

75 kg

person gain if all

H

atoms are replaced by

{}_{1}^{2}H

atoms?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 4>Q 47

1 gram

of a carbonate

(M_{2} {CO}_{3})

on treatment with excess

HCl

produces

0.01186 mole

of

{CO}_{2}

. The molar mass of

M_{2} {CO}_{3}

in

g {mol}^{- 1}

is :

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 4>Q 48

The ratio of mass percent of

C

and

H

of an organic compound

(C_{X} H_{Y} O_{Z})

is

6 : 1

. If one molecule of the above compound

(C_{X} H_{Y} O_{Z})

contains half as much oxygen as required to burn one molecule of compound

C_{X} H_{Y}

completely to

{CO}_{2}

and

H_{2} O

, what will be the empirical formula of the compound

C_{X} H_{Y} O_{Z}

?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 4>Q 49

In the following reaction, the mass of water produced from $445 g$ of $C_{57} H_{110} O_{6}$ is:

$2 C_{57} H_{110} O_{6} (s) + 163 O_{2} (g) ⟶ 114 {CO}_{2} (g) + 110 H_{2} O (1)$