25cm³ of a 0.2 mol dm³ solution of Na2CO3 requires 20 cm³ of a solution of HCl for neutralization. The concentration of the HCl solution is?
A. 0.5 mol dm³ B. 0.6 mol dm³ C. 0.2 mol dm³ D. 0.4 mol dm³ Correct Answer: Option A – 0.5 mol dm³
Three drops of a 1.0 mol dm−³ solution of NaOH are added to 20 cm³ of a solution of pH 8.4. The pH of the resulting solution will be?
A. Close to that of pure water B. Unaltered C. Greater than 8.4 D. Less than 8.4 Correct Answer: Option A – Close to that of pure water
When a salt loses its water of crystallization to the atmosphere on exposure; the process is said to be?
A. Efflorescence B. Deliquescence C. Effervescence D. Fluorescence Correct Answer: Option A – Efflorescence
Tetraoxosulphate (VI) acid burns the skin by?
A. Hydrolysis B. Hydration C. Heating D. Dehydration Correct Answer: Option D – Dehydration
The product of the electrolysis of dilute sodium hydroxide using platinum electrodes are?
A. Hydrogen and oxygen gases B. Water and hydrogen gas C. Water and sodium metal D. Sodium metal and oxygen gas Correct Answer: Option A – Hydrogen and oxygen gasesProducts
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