Chemistry MCQ

Assertion (A): In chromatography, the separation of components is based on their different affinities for the stationary and mobile phases.
Reason (R): Components with a higher affinity for the stationary phase move slower than those with a higher affinity for the mobile phase.

Assertion (A): The addition of hydrochloric acid to a solution containing carbonate (CO₃^2-) ions results in effervescence.
Reason (R): Carbonate ions react with hydrochloric acid to produce carbon dioxide gas, which causes the effervescence.

Assertion (A): The flame test for sodium (Na⁺) cation shows a bright yellow colour.
Reason (R): Sodium ions emit yellow light when heated or come under light.

A hydroxide of metal, which is soluble in conc. sodium hydroxide solution is:

Which salt solution will form a deep blue coloration when treated with excess of NH₄OH solution?

A salt whose solution gives bluish white precipitate when treated with NaOH and white ppt when tested with barium chloride solution is:

Ammonium hydroxide will produce a reddish brown precipitate, when added to a solution of:

Iron (III) chloride is treated with sodium hydroxide solution, the colour of precipitate formed is:

Potassium carbonate solution is added to Fe(II) chloride solution, a ppt is formed whose colour is:

When sodium carbonate solution is added to limewater, the colour of ppt is:

When potassium hydroxide is added to iron (III) chloride solution, the colour of precipitate Is :

When ammonia solution is added in excess to copper sulphate solution, the final colour of reaction mixture is:

When the sodium carbonate solution is added to copper sulphate solution, a precipitate is formed whose colour is:

A hydroxide of a metal which is reddish brown in colour:

A hydroxide of a metal which is bluish white in colour

A hydroxide of metal which has dirty green colour is:

The chloride of a metal which is insoluble in cold water, but soluble in hot water.

A chloride which forms a bluish white precipitate that is soluble in excess of ammonium hydroxide, is: