JEE Main · 2023 · 29 Jan 2023 · Shift 2 · Hydrogen

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Given below are two statements:
Statement I : Nickel is being used as the catalyst for producing syn gas and edible fats.
Statement II : Silicon forms both electron rich and electron deficient hydrides.
In the light of the above statements, choose the most appropriate answer from the options given below:
  1. (A)Both the statements I and II are correct
  2. (B)Statement I is incorrect but statement II is correct
  3. (C)Both the statements I and II are incorrect
  4. (D)Statement I is correct but statement II is incorrect✓ Correct

Answer: (D)

Solution

Nickel is a versatile catalyst: finely divided nickel hydrogenates vegetable oils into the semi-solid edible fats of vanaspati, and nickel is also used in the steam reforming of hydrocarbons that yields synthesis gas, so the first statement is sound. The hydrides of silicon, the silanes, possess exactly the number of electrons required for ordinary two-centre bonds and are electron-precise; they are neither electron-rich like ammonia nor electron-deficient like diborane, so the second statement is unsound. The first statement is correct while the second is incorrect.

JEE Main · 2023 · 29 Jan 2023 · Shift 2 · Single correct option

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