Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 5>Q 33

EASY

NEET

IMPORTANT

Earn 100

Which of the following is the best example of the law of conservation of mass:

44.44% studentsanswered this correctly

Important Questions on Some Basic Concepts of Chemistry

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 5>Q 34

The molecular weight of a compound is

180 .

If its empirical formula is

{CH}_{2} O

then the molecular formula of the compound is?

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 5>Q 35

4 moles each of

{SO}_{2}

and

O_{2}

gases are allowed to react to form

{SO}_{3}

in a closed vessel. At equilibrium,

25 %

of

O_{2}

is used up. The total number of moles of all the gases at equilibrium is:

MEDIUM

NEET

IMPORTANT

Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 5>Q 36

1 .12 ml

of a gas is produced at

STP

by the action of

4 .12 mg

of alcohol, with methyl magnesium iodide. The molecular mass of alcohol is

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 5>Q 37

The molality of a sulphuric acid solution is

0.2

. Calculate the total weight of the solution having

1000 g

of solvent.

MEDIUM

NEET

IMPORTANT

Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 5>Q 38

Generally, commercial hydrochloric acid is prepared by heating

NaCl

with concentrated

H_{2} {SO}_{4}

. How much

H_{2} {SO}_{4}

solution containing

93.0 % H_{2} {SO}_{4}

, by mass is required for the production of

1000 kg

of concentrated hydrochloric acid containing

43 %

HCl

by weight?

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 5>Q 39

{XeF}_{6}

fluorinated

I_{2}

to

{IF}_{7}

and liberates

Xe

(g).

3.5 millimole

of

{XeF}_{6}

can yield a maximum of _______

millimole

of

{IF}_{7}

.

EASY

NEET

IMPORTANT

Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 5>Q 40

Balance the following equation and choose the quantity which is the sum of the coefficient of all species:

$. . . . . {CS}_{2} + . . . . . {Cl}_{2} \to . . . . . {CCl}_{4} + \dots . . S_{2} {Cl}_{2}$

MEDIUM

NEET

IMPORTANT

Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 5>Q 41

The average atomic mass of magnesium is

24.31 amu .

This magnesium is composed of

79 mole %

of

{}^{24}{Mg}

and remaining

21 mole %

of

{}^{25}{Mg}

and

{}^{26}{Mg} .

Calculate

mole %

of

{}^{26}{Mg} .