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Wednesday, 10 June 2026
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Chemistry Past Questions and Answers

Chemistry Questions

Question 2726:
Which of following acids forms normal salts only?
  • A Tetraoxosulphate (VI) acid
  • B Trioxosulphate (IV) acid
  • C Trioxosulphate (IV) acid
  • D Tetraoxophosphate (V) acid
View Answer & Explanation
Question 2727:
A substance is said to be hygroscopic if it absorbs
  • A Water from the atmosphere to form a solution
  • B Heat from the surrounding
  • C Carbon (IV) oxide from the atmosphere
  • D Moisture from the atmosphere without dissolving
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Question 2728:
Calculate the mass of sodium hydroxide in 5.00 dm<sup style='font-size: smaller;'>3</sup> of a 0.125 mol dm<sup style='font-size: smaller;'>-3</sup> solution. [NaOH = 40 g mol<sup style='font-size: smaller;'>-1</sup>]
  • A 0.0156 g
  • B 0.625 g
  • C 1.00 g
  • D 25.0 g
View Answer & Explanation
Question 2729:
Which of the following salt solutions will have a pH greater than 7?
  • A NaCI<sub style='font-size: smaller;'>(aq)</sub>
  • B Na<sub style='font-size: smaller;'>2</sub>CO<sub style='font-size: smaller;'>3(aq)</sub>
  • C Na<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4(aq)</sub>
  • D NaHSO<sub style='font-size: smaller;'>4(aq)</sub>
View Answer & Explanation
Question 2730:
What will happen if more heat is applied to the following system at equilibrium? X<sub style='font-size: smaller;'>2(g)</sub> + 3Y <sub style='font-size: smaller;'>2(g)</sub> ⇌ 2XY<sub style='font-size: smaller;'>3(g)</sub>; ∆H = xKJmol<sup style='font-size: smaller;'>-1</sup>
  • A The yield of XY <sub style='font-size: smaller;'>3</sub> will decompose
  • B More of XY<sub style='font-size: smaller;'>3</sub> will decompose
  • C More of X<sub style='font-size: smaller;'>2</sub> will react
  • D The forward reaction will go to completion
View Answer & Explanation