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 Multiple Choice QuestionsMultiple Choice Questions

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1.

Amongst the following, select the element having highest ionization enthalpy.

  • Sodium

  • Potassium

  • Beryllium

  • Magnesium


2.

The main oxides formed on combustion of Li, Na and K in excess of air are, respectively:

  • LiO2, Na2O2 and K2O

  • LiO2, Na2O2 and KO2

  • LiO, Na2O2 and KO2

  • LiO, Na2O2 and KO2

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3.

Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?

  • CaSO4

  • BeSO4

  • BaSO4

  • BaSO4

410 Views

4.

The correct statement for the molecule, CsI3 is 

  • It is a covalent molecules

  • It contains Cs+ and I3-

  • It contains Cs3+ and I- ions

  • It contains Cs3+ and I- ions

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5.

Which of the following on thermal decomposition yields a basic as well as an acidic oxide?

  • NaNO3

  • KClO3

  • CaCO3

  • CaCO3

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6.

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect is :

  • Both form basic carbonates

  • Both form soluble bicarbonates

  • Both form nitrides

  • Both form nitrides

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7.

When BaCl2 is added to an aqueous salt solution, a white precipitate is obtained. The anion among CO32--, SO32-- and SO42- that was present in the solution can be

  • CO32- but not any of the other two

  • SO32- but not any of the other two

  • SO42- but not any of the other two

  • Any of them


8.

Match the flame colours of the alkaline earth metal salts in the Bunsen burner.

A. Calcium p. Brick red
B. Strontium q. Apple green
C. Barium r. Crimson

  • A - p; B - r; C - q

  • A - r; B - p; C - q

  • A - q; B ; r; C - p

  • A - p; B - q; C - r


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9.

Which of the following statement(s) is (are) correct when a mixture of NaCl and K2Cr2O7 is gently warmed with conc. H2SO4?

  • A deep red vapour is evolved

  • The vapour when passed through NaOH solution, gives a yellow solution

  • Chlorine gas is also evolved

  • Chromyl chloride is formed


10.

Addition of sodium thiosulphate solution to a solution of silver nitrate gives X as white precipitate, insoluble in water but soluble in excess thiosulphate solution to give Y. On boiling in water, Y gives Z. X, Y and Z respectively are

  • Ag2S2O3, Na3[Ag(S2O3)2], Ag2S

  • Ag2SO4, Na[Ag(S2O3)2], Ag2S2

  • Ag2S2O3, Na5[Ag(S2O3)3], AgS

  • Ag2SO3, Na3[Ag(S2O3)2], Ag2O


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