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p-Block Element...

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  • Question 1
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    Which of the following is the most acidic?

  • Question 2
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    In earlier days of photography, strong ammonia solution was used to dissolve unchanged AgBr. In photographic 'fixing', nowadays, ammonia has been replaced by Na2S2O3 because

  • Question 3
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    Directions For Questions

    The following question has four choices, out of which ONLY ONE is correct.

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    Which of the following statements about SCl4 is not correct?

  • Question 4
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    The most favourable condition for the manufacture of NH3 is

  • Question 5
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    The oxidation state of nitrogen in dinitrogen oxide is

  • Question 6
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    A gas X with disagreeable odour reduces silver nitrate solution to give metallic silver and is itself oxidised to Y. Y is a dibasic acid with reducing properties. It is slowly oxidised in air to a tribasic acid Z. Though Z is a tribasic acid, it behaves in aqueous solution mostly as a dibasic acid. When a mixture of X and N2O is subjected to electric spark, Z is obtained.

    The gas X is

  • Question 7
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    Which of the following statements is incorrect regarding hypophosphorous acid?

  • Question 8
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    Which of the following is the strongest acid?

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