Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 6

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Earn 100

The vapour density of a compound containing $C, H$ and $O$ is $42 .$ If the $%$ of $C$ and $H$ are $\frac{400}{7}$ and $\frac{100}{21}$ respectively. The possible molecular formula is:

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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 7

Ammonia is produced by Haber's process, which is:

N_{2} + H_{2} ⟶ {NH}_{3}

To produce

10 L {NH}_{3}

at

STP

, the total volume of

N_{2}

and

H_{2}

required will be:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 8

\frac{1}{2}

mole of

C_{5} H_{12}

undergoes combustion. The volume of

{CO}_{2}

obtained at

STP

will be:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 9

Mass of water produced in previous question is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 10

When

100 %

pure sample of

{CaCO}_{3}

was heated strongly

6.72 L

of

{CO}_{2}

was produced at

STP

. Find the weight of residual

CaO

left?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 11

When dinitrogen pentoxide (

N_{2} O_{5},

a white solid) is heated, it decomposes into nitrogen dioxide and oxygen. If a sample of

N_{2} O_{5}

, produces

1.6 g O_{2}

, then how many grams of

{NO}_{2}

are formed?

N_{2} O_{5} (s) \overset{Δ}{\to} {NO}_{2} (g) + O_{2} (g)

(not balanced)

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 12

For reaction

2 A + B \to A_{2} B

5

moles of

A

are reacted with

10

moles of

B

. Hence the limiting reagent and the moles of

A_{2} B

formed are:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 13

Zn (s) + C (s) + O_{2} (g) \to {ZnCO}_{3} (s)

0.1 mol

Zn

and

0.2 mol

carbon are heated in the presence of

11.2 L O_{2}

at

STP

. Hence, the limiting reagent is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 14

In the previous question, mass of

{ZnCO}_{3}

produced, assuming that the reaction goes to

100 %

completion : (At mass of

Zn = 65

).