Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 28

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One mole of potassium chlorate $({KClO}_{3})$ is thermally decomposed and the gaseous product formed will react with excess of aluminium. How many moles of aluminium oxide $({Al}_{2}^{} O_{3})$ are formed?

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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 29

Assuming that petrol is iso-octane

(C_{8} H_{18})

and has a density

0.8 g {mL}^{- 1}

. What will be the consumption of oxygen on complete combustion of

1.425 L

petrol?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 30

21.6 g

of silver coin is dissolved in

{HNO}_{3}

. When

NaCl

is added to this solution, all silver is precipitated as

AgCl

. The weight of

AgCl

is found to be

14.35 g

, then

%

of silver in coin is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 31

25.4 g

of iodine and

14.2 g

of chlorine are made to react completely to yield a mixture of

ICl

and

{ICl}_{3}

. Calculate the number of moles of

ICl

and

{ICl}_{3}

formed respectively.

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 32

A mixture of $1.0$ mole of $Al$ and $3.0$ moles of ${Cl}_{2}$ are allowed to react as:

$2 Al (s) + 3 {Cl}_{2} (g) ⟶ 2 {AlCl}_{3} (s)$

(1) Which is the limiting reagent?
(2) How many moles of ${AlCl}_{3}$ are formed?
(3) Moles of excess reagent left unreacted is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 33

Zinc and hydrochloric acid react according to the reaction:

Zn (s) + 2 HCl (aq .) ⟶ {ZnCl}_{2} (aq .) + H_{2} (g)

If

0.3

mole of

Zn

are added to hydrochloric acid containing

0.52

mole

HCl

, how many moles of

H_{2}

are produced?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 34

When a mixture of

10

mole of

{SO}_{2}, 15

mole of

O_{2}

was passed over catalyst,

8

mole of

{SO}_{3}

was formed. How many mole of

{SO}_{2}

and

O_{2}

did not enter into combination?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 35

0.5 mole

of

H_{2} {SO}_{4}

is mixed with

0.2 mole

of

Ca (OH)_{2}

. The maximum number of moles of

{CaSO}_{4}

formed is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 36

Decreasing order of mass of pure $NaOH$ in each of the aqueous solution is

(I) $50 g$ of $40 %$ $(W / W) NaOH$
(II) $50 ml$ of $50 % (W / V) NaOH (d_{sol} = 1.2 g / ml)$
(III) $50 g$ of $15 M NaOH (d_{sol} = 1 g / ml)$