Verified Solution • 2025–26 Session moderate

QAIPMT-2007-Ch-2291: NEET 2007 Chemistry - Class 12 AIPMT-2007-Ch-2291 Solution: Identify the incorrect statement among the following:…

Identify the incorrect statement among the following: Lanthanoid contraction is the accumulation of successive shrinkages. As a result of lanthanoid contraction the properties of 4d series of the transition elements have no similarities with the 5d series of elements. Shielding power of 4f electrons is quite weak. There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu.

Multiple Choice Options

  • A The Δ\Delta _ G fo_f^o f o _ of the sulphide is greater than those for CS 2 and H 2 S.
  • B The Δ\Delta _ G fo_f^o f o _ is negative for roasting of sulphide ore to oxide.
  • C Roasting of the sulphide to the oxide is thermodynamically feasible.
  • D Carbon and hydrogen are suitable reducing agents for metal sulphides.

Step-by-Step Verified Solution

Carbon and hydrogen are not suitable reducing agents for metal sulphides.

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