NEET
Practice Test 14
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These are Assertion-Reason type questions. Each of these question contains two statements:Statement-1 (Assertion) and Statement-2 (Reason). Answer these questions from the following four options.

Statement-1 : [Ti(H2O)6]3+ is coloured while [Sc(H2O)6]3+ is colourless.

Statement-1 : d-d transition is not possible in [Sc(H2O)6]3+.

  • Solution

    Both statement-1 and statement-2 are true and statement-2 is the correct explanation of statement-1.[Sc(H2O6]3+ has no unpaired electron in its d subshell and thus d–d transition is not possible whereas[Ti(H2O)6]3+ has one unpaired electron in its d subshell which gives rise to d–d transition to impart colour

These are Assertion-Reason type questions. Each of these question contains two statements:Statement-1 (Assertion) and Statement-2 (Reason). Answer these questions from the following four options.

Statement-1 : [Fe(CN)6]3– is weakly paramagnetic while [Fe(CN)6]4– is diamagnetic.

Statement-2 : [Fe(CN)6]3– has +3 oxidationstate while [Fe(CN)6]4– has +2 oxidation state.

  • Solution

    Both statement-1 and statement-2 are true but statement-2 is not the correct explanation of statement-

    1. [Fe(CN)6]3– is weakly paramagnetic as it hasunpaired electrons while [Fe(CN)6]2– has no unpaired electron.

    Δ It is diamagnetic.

These are Assertion-Reason type questions. Each of these question contains two statements:Statement-1 (Assertion) and Statement-2 (Reason). Answer these questions from the following four options.

Statement-1: NF3 is a weaker ligand than N(CH3)3.

Statement-2 : NF3 ionizes to give F–ions in aqueous solution.

  • Solution

    It is correct statement that NF3 is a weaker ligand than N(CH3)3, the reason is that fluorine is highly electro negative therefore, it with draw electrons from nitrogen atom. Hence, the lone pair of nitrogen atom cannot be ligated. While N(CH3)3 is a strong ligand because CH3 is electron releasing group.

Read the passage given below and answer the questions that follow :

When a metal rod M is dipped into an aqueous colourless concentrated solution of compound N, the solution turns light blue. Addition of aqueous NaCl to the blue solution gives a white precipitate O. Addition of aqueous NH3 dissolves O and gives an intense blue solution.

The final solution contains

  • Solution

Read the passage given below and answer the questions that follow :

When a metal rod M is dipped into an aqueous colourless concentrated solution of compound N, the solution turns light blue. Addition of aqueous NaCl to the blue solution gives a white precipitate O. Addition of aqueous NH3 dissolves O and gives an intense blue solution.

The compound N is

Read the passage given below and answer the questions that follow :

When a metal rod M is dipped into an aqueous colourless concentrated solution of compound N, the solution turns light blue. Addition of aqueous NaCl to the blue solution gives a white precipitate O. Addition of aqueous NH3 dissolves O and gives an intense blue solution.

The metal rod M is

Which of the following complex species is not expected to exhibit optical isomerism ?

  • Solution

    Octahedral coordination entities of the type Ma3b3 exhibit geometrical isomerism. The compound exists both as facial and meridional isomers, both contain plane of symmetry

[NiCl2 {P(C2H5)2(C6H5)}2] exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic). The coordination geometries of Ni2+ in the paramagnetic and diamagnetic states are respectively

  • Solution

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COORDINATION COMPOUNDS
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