COMEDK 2025 Morning Shift | Some Basic Concepts of Chemistry Question 1 | Chemistry

If X is a haloalkane with a single Chlorine atom per molecule and the percentage of Cl is 55 , what would be the number of Cl atoms present in 0.1 g of the haloalkane? Atomic mass of $\mathrm{Cl}=35.5 \mathrm{~g} / \mathrm{mol}$

$6.022 \times 10^{22}$

$1.2044 \times 10^{21}$

$9.328 \times 10^{20}$

$9.329 \times 10^{23}$

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

What mass of Silver chloride, in grams, gets precipitated when $$150 \mathrm{~ml}$$ of $$32 \%$$ solution of Silver nitrate is reacted with $$150 \mathrm{ml}$$ of $$11 \%$$ Sodium chloride solution? Atomic mass in $$\mathrm{g} / \mathrm{mol}: \mathrm{Ag}=108, \mathrm{Na}=23, \mathrm{Cl}=35.5, \mathrm{~N}=14, \mathrm{O}=16$$

40.47

32.45

48.0

16.52

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

Sulphuric acid used in Lead Storage battery has a concentration of $$4.5 \mathrm{~M}$$ and a density of $$1.28 \mathrm{~g} / \mathrm{~ml}$$. The molality of the acid is __________.

4.012

2.568

5.364

3.516

COMEDK 2024 Afternoon Shift

MCQ (Single Correct Answer)

-0

When 1 mole of $$\mathrm{O}_2$$ and 1 mole of ammonia are made to react in the reaction,

$$4 \mathrm{NH}_3(\mathrm{~g})+5 \mathrm{O}_2(\mathrm{~g}) \rightarrow 4 \mathrm{NO}(\mathrm{g})+6 \mathrm{H}_2 \mathrm{O}(\mathrm{g})$$

$$ \mathrm{NH}_3 \text { is the limiting reagent } $$

$$ 1.0 \text { mole of NO will be produced } $$

$$ 6 \text { moles of } \mathrm{H}_2 \mathrm{O} \text { will be produced } $$

$$ \text { Oxygen is the limiting reagent } $$

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