Principles Related to Practical Chemistry questions
214 published questions with worked solutions.
- Fe^ 2+ ion can be distinguished from Fe^ 3+ ion by:
- Addition of NaOH on Zn^ 2+ ion gives a white ppt. which on adding excess of NaOH dissolves. In this solution Zn exists in:
- A chocolate brown coloured compound with acetic acid and potassium ferrocyanide is obtained from a salt solution containing:
- All metal chlorides are soluble in water except those of:
- An aqueous solution of FeSO_4, Al_2(SO_4)_3 and chrome alum is heated with excess of Na_2O_2 and filtered. The materials obtained...
- A metal gives two chlorides 'A' and 'B'. 'A' gives a black precipitate with NH_4OH and 'B' gives a white one. With KI, 'B' gives...
- Blue colour/precipitate will be obtained when K_4[Fe(CN)_6] reacts with:
- An aqueous solution of CuSO_4 and NH_4OH gives a deep blue complex of:
- A yellow precipitate is formed when H_2S is passed through an acidified solution of:
- Cu^ 2+ ions give a precipitate with K_4Fe(CN)_6. The colour of the precipitate is:
- Iodide of Millon's base is:
- Silver nitrate solution gives a red precipitate with:
- A salt solution is treated with chloroform drops and is shaken with chlorine water. The chloroform layer becomes violet; the...
- The Lassaigne's extract is boiled with conc. HNO₃ while testing for halogens. By doing so it
- When sodium extract is prepared, generally the substance which ignites is:
- p-Chloroaniline and anilinium hydrogen chloride can be distinguished by [UP SEE 2003]
- Match metal ion (List I) with colour (List II) in presence of alizarin. | Column-I | Column-II | |---|---| | (A) Sr^ 2+ | (1)...
- Alizarin gives a red colour by mordanting it with the sulphate of a metal. The metal ion involved is:
- Estimation of calcium and magnesium is done by **[UP SEE 2006]**
- Dimethylglyoxime forms a coloured complex with
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