Chemistry
What would you observe when:
(a) blue litmus is introduced into a solution of hydrogen chloride gas.
(b) red litmus paper is introduced into a solution of ammonia in water,
(c) red litmus paper is introduced in caustic soda solution?
Acids Bases Salts
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Answer
(a) Blue litmus will turn into red showing acidic nature of solution.
(b) Red litmus will turn into blue showing alkaline nature of ammonia.
(c) Red litmus will turn into blue showing basic nature of solution.
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Related Questions
Name:
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(b) a chloride which is insoluble
(c) two sulphates which are insoluble
(d) a basic salt,
(e) an acidic salt,
(f) a mixed salt,
(g) a complex salt,
(h) a double salt.
Fill in the blanks with suitable words :
An acid is a compound which when dissolved in water forms hydronium ions as the only …………… ions. A base is a compound which is soluble in water contains …………… ions. A base reacts with an acid to form a …………… and water only. This type of reaction is known as …………….
Explain why :
(a) it is necessary to find out the ratio of reactants required in the preparation of sodium sulphate,
(b) fused calcium chloride is used in the preparation of FeCl3
(c) Anhydrous FeCl3 cannot be prepared by heating hydrated Iron (III) chloride.
Match the salts given in column A to their methods of preparation in column B. Write a balanced equation for each preparation.
Column A Column B Zinc sulphate Precipitation Ferrous sulphide Oxidation Barium sulphate Displacement Ferric sulphate Neutralisation Sodium sulphate Synthesis.