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99 Percentile Qs Bank for JEE MainChemistryd and f Block Elements

Which of the following are correct? (i) V ²⁺ liberates hydrogen from a dilute acid (ii) The earlier members of lanthanide series behave more like aluminium (iii) The 'silver' UK coins are made of Cu / Ni alloy (iv) The maximum oxidation state exhibited by Neptunium is +7

Options

  1. A(i) (iii) only
  2. B(ii) (iv) only
  3. C(i) (iii) (iv) only
  4. D(i) (ii) (iii) only

Correct answer

C. (i) (iii) (iv) only

Step-by-step solution

V ²⁺ is a strong reducing agent and liberates hydrogen from a dilute acid. Thus, (i) is correct. In chemical behaviour, the earlier members of the lanthanide series behave more like calcium. Thus, (ii) is incorrect. Silver UK coins = Cu + Ni alloy. Thus, (iii) is correct. Neptunium (Np) belongs to the actinides series and has the configuration 5 f ^4 6 ~d ^ 1 7 ~s ^2 because of which it can show a maximum of +7 oxidation state. Thus, (iv) is correct.

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