Q. Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test of chloride ions with silver nitrate at 25°C?

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A

B

C

D

Solution:

As is represented as it means it does not have any ionisable hence no white ppt of AgCl is possible. In other three complexes given here ionisable is possible so white ppt of AgCl is possible.
no ppt

Questions from NTA Abhyas 2022

1. An alkene on ozonolysis gives a mixture of two carbonyl compounds. Mixture on Clemmensen reduction gives just one alkane . is the lowest alkane which in pure form can not be prepared by standard Wurtz method. is

2. A cation is in the centre touches three anions. Assume that the anions also touch each other. The limiting radius ratio, is

3. Blue colour of alkali and alkaline earth metals in liquid is due to

4. Which of the following oxides is strongly basic?

5. In a box hydroiodic acid is taken. After equilibrium the concentration of is found to be . The concentration of at equilibrium in , is

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