Which of the following is used to prepare Cl2 gas at room te

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 Multiple Choice QuestionsMultiple Choice Questions

711.

Which is the strongest acid in the following?

  • H2SO4

  • HClO3

  • HClO4

  • H2SO3


712.

Which one of the following is not true at room temperature and pressure?

  • P4O10 is white solid

  • SO2 is a colourless gas

  • SO3 is a colourless gas

  • NO2 is a brown gas


713.

An element belongs to group 15 and third period of the Periodic Table. Its electronic configuration will be:

  • 1s22s22p3

  • 1s22s22p4

  • 1s22s22p63s23p3

  • 1s22s22p63s23p2


714.

Which one of the following is paramagnetic?

  • N2

  • NO

  • CO

  • O3


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715.

Which of the following is used to prepare Cl2 gas at room temperature from concentrated HCl?

  • MnO2

  • H2S

  • KMnO4

  • Cr2O3


C.

KMnO4

2KMnO4 + 16 HCl  2KCl + 2MnCl2 + 8H2O + 5Cl2


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716.

NO2 is not obtained on heating:

  • AgNO3

  • KNO3

  • Cu(NO3)2

  • Pb(NO3)2


717.

Which of the following is a polar molecule?

  • BF3

  • SF4

  • SiF4

  • XeF4


718.

P4O10 is the anhydride of

  • H3PO2

  • H3PO3

  • H3PO4

  • H4P2O7


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719.

Of the following acids the one which has the capability to form complex compound and also possesses oxidising and reducing properties is

  • HNO3

  • HNO2

  • HCOOH

  • HCN


720.

Atoms in a P4 molecule of white phosphorus are arranged regularly in the following way

  • at the corners of a cube

  • at the corners of an octahedron

  • at the corners of a tetrahedron

  • at the centre and corners of a tetrahedron


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