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Chemistry Past Questions and Answers

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Chemistry Questions

Question 2611:

If a solution has a pH of 2, it can be concluded that it

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A Is a weak electrolyte
B Has hyrogen ion concentration of 0.2 mol sm<sup style='font-size: smaller;'>-3</sup>
C Is twice as acidic as a solution of pH 1,
D Will produce effervescence with magnesium ribbon

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Question 2612:

Which of the following salts is stable to heat?

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A K<sub style='font-size: smaller;'>2</sub>CO<sub style='font-size: smaller;'>3</sub>
B (NH<sub style='font-size: smaller;'>4</sub>)<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4</sub>
C NaHCO <sub style='font-size: smaller;'>3</sub>
D AgNO<sub style='font-size: smaller;'>3</sub>

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Question 2613:

Which of the following compounds dissolves in water to give an alkaline solution?

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A Ammonium chloride
B Sodium chloride
C Sulphur (IV) oxide
D Potassium oxide

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Question 2614:

Which of the following salts is stable to heat?

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A K <sub style='font-size: smaller;'>2</sub>CO <sub style='font-size: smaller;'>3</sub>
B (NH <sub style='font-size: smaller;'>4</sub>) <sub style='font-size: smaller;'>2</sub>SO <sub style='font-size: smaller;'>4</sub>
C NaHCO<sub style='font-size: smaller;'>3</sub>
D AgNO<sub style='font-size: smaller;'>3</sub>

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Question 2615:

What type of reaction is involved when wood shavings produce a brown gas with concentrated HNO<sub style='font-size: smaller;'>3</sub>?

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A Redox reaction
B Destructive distillation
C Dehydration
D Nutralization

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