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Chemistry Test ...

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  • Question 1
    4 / -1

    The reason for double helical structure of DNA is operation of

  • Question 2
    4 / -1

    The decreasing values of bond angles from NH3 (106 °) to SbH3 (101 °) down group-15 of the periodic table is due to

  • Question 3
    4 / -1

    The time for half-life period of a certain reaction A → Products is 1 hour, when the initial concentration of the reactant ‘A’ is 2.0 mol L–1, how much time does it take for its concentration to come from 0.50 to 0.25 mol L–1 if it is a zero order reaction?

  • Question 4
    4 / -1

    Which of the following oxides is amphoteric in character?

  • Question 5
    4 / -1

    The radius of Li3+ (Atomic number of La = 57) is 1.06 Å. Which one of the following given values will be closest to the radius of Lu3+ (Atomic number of Lu = 71)?

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