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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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14 g of element X combine with 16 g of oxygen. On the basis of this information, which of the followings is a correct statement?

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Correct option: C

The element X could have an atomic weight of 7 and its oxide is

{\mathrm{X}_2}\mathrm{O}

Option D (80%) is correct because it is the calculated percentage of association of the solute based on the observed freezing point depression and the van't Hoff factor.

More Questions from SOME BASIC CONCEPTS OF CHEMISTRY

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If a mixture containing 3 moles of hydrogen and 1 mole of nitrogen is converted completely into ammonia, the ratio of initial and final volumes under the same temperature and pressure would be: How many g are present in one mole of Ag? 8 g of NaOH is dissolved in 18 g of

{H_2}O.

Mole fraction of NaOH in solution and molality (in

mol\,\,k{g^{ - 1}})

of the solution respectively are

2.24 {~L}

{CH}_4

at NTP contains :- One litre of

{CO}_2

is passed through red hot coke. The volume becomes 1.4 litres at same temperature and pressure. The composition of products is How many millilitre of

0.5 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4

are needed to dissolve

0.5 \mathrm{~g}

\mathrm{Cu}(\mathrm{II})

carbonate?