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    CBSE

    Subject

    Chemistry
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    NEET Chemistry : The p-Block Elements

    Multiple Choice Questions

    281.

    Which among the following is paramagnetic ?

    • Cl2O

    • ClO2

    • Cl2O7

    • Cl2O6

    Answer
    • 282.

    Sulphur does not exist as S2 molecule because

    • it is less electronegative

    • it is not able to constitute pπ-pπ bonds

    • it has ability to exhibit catenation

    • of tendency to show variable oxidation states

    Answer
    • 283.

    The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is :

    • 20

    • 30

    • 40

    • 10

    Answer
    • 284.

    Oxidation number of sulphur in Caro's acid is 

    • +6

    • +4

    • +8

    • +7

    Answer
    • 285.

    Acetic acid reacts with PCl5, to form

    • CH2ClCOOH

    • CHCl2COOH

    • CH3COCl

    • CH3COOCl

    Answer
    • 286.

    Oleum is

    • castor oil

    • oil of vitriol

    • fuming H2SO4

    • none of the above

    Answer
    • 287.

    Liquor ammonia is

    • ammonium hydroxide

    • liquified ammonia gas

    • concentrated solution of NH3 in water

    • a solution of NH3 in alcohol

    Answer
    • 288.

    The correct structure of tribromooctaoxide is

    Answer
    • 289.

    Polyanion formation is maximum in

    • nitrogen

    • sulphur

    • oxygen

    • boron

    Answer
    • 290.

    Which is the correct thermal stability order for H2E (E = O, S, Se, Te and Po)?

    • H2O < H2S < H2Se < H2Te < H2Po

    • H2Po < H2Te < H2Se < H2S < H2S

    • H2Se < H2Te <H2Po < H2O < H2S

    • H2S < H2O < H2Se < H2Te <H2Po

    Answer
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