Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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21.

Metal ion responsible for the Minimata disease is

  • CO2+

  • Hg2+

  • Cu2+ 

  • Zn2+


B.

Hg2+

Eating animal poisoned with mercury (Hg2+) causes deformity, known as minamata (minimata) disease which is characterised by diarrhoea, hemolysis,  impairment of various senses, meningitis and death.


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22.

The compressibility factor (Z) of one mole of a van der Waals' gas of negligible 'a' value is

  • 1

  • bpRT

  • 1 + bpRT

  • 1-bpRT


23.

The volume of ethyl alcohol (density 1.15 g/cc) that has to be added to prepare 100 cc of 0.5 M ethyl alcohol solution in water is

  • 1.15 cc

  • 2 cc

  • 2.15 cc

  • 2.30 cc


24.

The bond angle in NF3 (102.3°) is, smaller than NH3 (107.2°). This is because of

  • large size of F compared to H

  • large size of N compared to F

  • opposite polarity of N in the two molecules

  • small size of H compared to N


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25.

The structure of XeF6 is experimentally determined to be distorted octahedron. Its structure according to VSEPR theory is

  • octahedron

  • trigonal bipyramid

  • pentagonal bipyramid

  • tetragonal bipyramid


26.

For a spontaneous process, the correct statement(s) is (are)

  • (Gsystem)T, p > 0

  • (Ssystem) + (Ssurroundings) > 0

  • (Gsystem)T, p < 0

  • (Usystem)t, v > 0


27.

The IUPAC name of the following molecule is

  • 5,6-dimethylhept-2-ene

  • 2,3-dimethylhept-5-ene

  • 5,6-dimethylhept-3-ene

  • 5-iso-propylhex-2-ene


28.

The reagents to carry out the following conversion are

  • HgSO4/dil. H2SO4

  • BH3; H2O2/NaOH

  • OSO4; HIO4

  • NaNH2/ CH3I; HgSO4/ dil.H2SO4


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29.

Among the following structures the one which is not a resonating structure of others is

  • I

  • II

  • III

  • IV


30.

If Cl2 is passed through hot aqueous NaOH, the products formed have Cl in different oxidation states. These are indicated as

  • -1 and +1

  • -1 and +5

  • +1 and +5

  • -1 and +3


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