Chemistry
Mention the colour change when following indicators are added:
| Solution | Acids | Alkalies |
|---|---|---|
| (a) Alkaline phenolphthalein solution, | ||
| (b) Methyl orange solution, | ||
| (c) Neutral litmus solution |
Related Questions
Copy and complete the following table which refers to the action of heat on some carbonates :
Carbonate Colour of residue on cooling Zinc carbonate Lead carbonate Copper carbonate Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solutions of copper (II) sulphate, zinc nitrate, lead nitrate, calcium chloride and iron (III) sulphate. Copy the following table and write the colour of the precipitate in (i) to (v) and the nature of the precipitate (soluble or insoluble) in (vi) to (x).
Aqueous salt solution Colour of precipitate when NaOH is added in a small quantity Nature of precipitate (soluble or insoluble) when NaOH is added in excess Copper (II) sulphate (i) (vi) Zinc nitrate (ii) (vii) Lead nitrate (iii) (viii) Calcium chloride (iv) (ix) Iron (III) sulphate (v) (x) (a) Select the correct answer from A, B, C and D.
A. Nitroso iron (II) sulphate
B. Iron (III) chloride
C. Chromium sulphate
D. Lead (II) chloride.
(i) The compound which is responsible for the green colour formed when SO2 is bubbled through acidified potassium dichromate solution.
(ii) Compound responsible for brown ring.
Choose from the list of substances — Acetylene gas, aqua fortis, coke, brass, barium chloride, bronze, platinum.
An aqueous salt solution used for testing sulphate radical.