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

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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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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 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 $15 M NaOH (d_{sol} = 1 g / ml)$

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 37

What is the quantity of water that should be added to

16 g

methanol to make the mole fraction of methanol as

0.25

?

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 38

When

25 g

of

{Na}_{2} {SO}_{4}

is dissolved in

10^{3} Kg

of solution, its concentration will be

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 39

The molar concentration of pure water at

4 ° C

and

1

atm pressure is

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 40

20 g

of solute

X

is dissolved in

50 g

of water.

15 g

of solute

Y

is dissolved in

70 g

of benzene. The molalities of the solutes in these two solutions are the same. Hence, the ratio of the molecular weights of solute

X

to the solute

Y

is:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 41

A

500 g

toothpaste sample has

0.4 g

fluoride concentration. The fluoride concentration in terms of

ppm

(Particles per million) will be:

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Alpha Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 2>Q 42

What is the

{Na}^{+}

ion concentration in the solution formed by mixing

20 mL

of

0.10 M {Na}_{2} {SO}_{4}

solution with

50 mL

of

0.30 M {Na}_{3} {PO}_{4}

solution?