MolSynapsequestion bank

MolSynapse / Question bank / p-Block Elements: Groups 13 and 14 / Carbon allotropes, oxides of carbon

JEE Advanced levelSingle correct optionDifficulty 3 of 3pb199

Nickel tetracarbonyl, $Ni (CO) X_{4}$ , formed from CO and nickel, has the following oxidation state of Ni, geometry and magnetic behaviour:

A0, tetrahedral, paramagnetic
B+4, tetrahedral, diamagnetic
C0, tetrahedral, diamagnetic
D0, square planar, paramagnetic

Answer: C

CO is a neutral ligand, so Ni is in oxidation state 0 (

3 d^{10}

after the

4 s

electrons move into

3 d

). Four CO ligands donate into

s p^{3}

hybrid orbitals, giving a tetrahedral complex. With no unpaired electrons it is diamagnetic.

Practice p-Block Elements: Groups 13 and 14 More on Carbon allotropes, oxides of carbon

Previous questionNext question

More questions on Carbon allotropes, oxides of carbon

The correct order of C-O bond length is JEE Advanced level
Consider the statements: (i) diamond is the hardest natural substance and is a poor conductor; (ii) at ordinary temperature and pressure gra... JEE Advanced level
Match the reactions of carbon monoxide/dioxide in Column I with products in Column II. Column I: (P) CO + Cl2 (sunlight); (Q) CO + NaOH (hea... JEE Advanced level
Which of the following reactions occur as written? JEE Advanced level
8.96 L (at STP) of a CO and CO2 mixture has an average molar mass of 36 g/mol. It is bubbled through excess lime water. Taking molar volume ... JEE Advanced level