Chemistry
Complete the table:
| Indicator | Neutral | Acidic | Alkaline |
|---|---|---|---|
| Litmus | Purple | ………. | ………. |
| Phenolphthalein | Colourless | ………. | ………. |
Related Questions
Write balanced equation to satisfy each statement.
(a) Acid + Active metal ⟶ Salt + Hydrogen
(b) Acid + Base ⟶ Salt + Water
(c) Acid + carbonate or bicarbonate ⟶ Salt + water + carbon dioxide
(d) Acid + sulphite or bisulphite ⟶ Salt + water + sulphur dioxide
(e) Acid + sulphide ⟶ Salt + hydrogen sulphide
The skin has and needs natural oils. Why it is advisable to wear gloves while working with strong alkalis?
What do you understand by pH value? Two solution X and Y have pH values of 4 and 10 respectively. Which one of these two will give a pink colour with phenolphthalein indicator.
M is an element in the form of powder. M burns in oxygen and the product obtained is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences.
(a) If M is a metal, then the litmus will turn ……………
(b) If M is a non-metal, then the litmus will turn ……………
(c) If M is a reactive metal, then …………… will be evolved when M reacts with dilute sulphuric acid.
(d) If M is a metal, it will form …………… oxide, which will form …………… solution with water.
(e) If M is a non-metal, it will not conduct electricity unless it is in the form of ……………