Chemistry
The skin has and needs natural oils. Why it is advisable to wear gloves while working with strong alkalis?
Acids Bases Salts
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Answer
Alkalis react with oil to form soap. Since, our skin contains oil hence when we touch strong alkalis, a reaction takes place and soapy solutions are formed. This reaction can be corrosive for skin. Hence we should wear gloves while working with strong alkalis.
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Related Questions
How would you obtain:
(a) a base from another base,
(b) an alkali from a base,
(c) salt from another salt?
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
Complete the table:
Indicator Neutral Acidic Alkaline Litmus Purple ………. ………. Phenolphthalein Colourless ………. ………. 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.