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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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Analyzing +4 | -1

Consider the following redox reaction :

{H}_2 {O}_2+{O}_3 \rightarrow {H}_2 {O}+2 {O}_2

Total loss or gain of electrons by one mole of ozone are

View answer and explanation

Correct option: A

Gain of 2 moles of electrons

Option D (Both A and R are correct but R is NOT the correct explanation of A) is correct because both the assertion about the size of the hydrogen nucleus and the reason that protons exist in combined form are true, but they are unrelated statements.

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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})