Give reason why thick white fumes are formed when a glass rod dipped in NH $_{4}$ OH is brought near the mouth of the bottle full of HCl. [1 mark]

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Solution

When a glass rod dipped in ammonium hydroxide (NH $_{4}$ OH) is brought near the mouth of a bottle full of HCl gas, HCl reacts with ammonium hydroxide to produce dense white fumes of ammonium chloride (NH $_{4}$ Cl). [0.5 marks]

NH $_{4}$ OH (aq) + HCl (g) $\to$ NH $_{4}$ Cl (g) + H $_{2}$ O (l) [0.5 marks]
(White fumes)

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Explain why :

(a) anhydrous HCl is a poor conductor while aqueous HCl is an excellent conductor.
(b) when the stopper of a bottle full of hydrogen chloride gas is opened there are fumes in the air.
(c) a solution of hydrogen chloride in water turns blue litmus red and conducts electricity, while a solution of the same gas in toluene :
(i) has no effect on litmus, and
(ii) does not conduct electricity.
(d) thick white fumes are formed when a glass rod dipped in $N H_{4} O H$ is brought near the mouth of a bottle full of HCl gas.
(e) dry hydrogen chloride gas does not affect a dry strip of blue litmus paper but it turns red in the presence of a drop of water.

(f) hydrogen chloride gas is not collected over water.

Q. Give reason why thick white fumes are formed when a glass rod dipped in

N H_{4} O H

is brought near the mouth of the bottle full of

H C l

Thick white fumes are formed when glass rod dipped in NH₄OHis brought near the mouth of bottle full of HCl gas?

thick white fumes are formed when a glass rod is dipped in ammonia hydroxide is brought near the mouth of the bottle full of hcl gas

Explain why?

White thick fumes are formed when a glass rod dipped in ${NH}_{4} OH$ is brought near the mouth of a bottle full of $HCl$ gas.

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Give reason why thick white fumes are formed when a glass rod dipped in NH4OH is brought near the mouth of the bottle full of HCl. [1 mark]​

When a glass rod dipped in ammonium hydroxide (NH4OH) is brought near the mouth of a bottle full of HCl gas, HCl reacts with ammonium hydroxide to produce dense white fumes of ammonium chloride (NH4Cl). [0.5 marks]​ NH4OH (aq) + HCl (g) → NH4Cl (g) + H2O (l) [0.5 marks] (White fumes)

Give reason why thick white fumes are formed when a glass rod dipped in NH $_{4}$ OH is brought near the mouth of the bottle full of HCl. [1 mark]