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Mdcat-past-papers - UHS - Chemistry Quiz

Filters: Board: UHS | Subject: Chemistry |
141. Consider the equilibrium: BiCl₃ + H₂O ⇌ BiOCl + 2HCl Addition of which chemical will turn the cloudy solution clear?



142. In AgCl solution, addition of NaCl causes precipitation of AgCl due to:



143. A buffer solution resists or minimizes change in:



144. The decrease in solubility of a salt due to presence of a common ion is known as:



145. Which one of the following is the correct presentation for Ksp? AgCl ⇌ Ag⁺ + Cl⁻



146. The value of Ksp for PbSO₄ at 25°C is:



147. The product of ion concentrations of a sparingly soluble salt, each raised to its power at 298K is:



148. Precipitation occurs if the ionic concentration is:



149. In an oxidation reaction, atoms of an element lose electrons and increase in:



150. In MgCl₂, the oxidation state of Cl is:



151. Which one of the following is a redox reaction?



152. In SO₃²⁻, the oxidation number of sulphur is:



153. Study the following redox reaction: 10Cl⁻ + 16H⁺ + 2MnO₄⁻ → 5Cl₂ + 2Mn²⁺ + 8H₂O



154. Oxidation number of an element can be inferred from its:



155. In which of the following does oxygen show a fractional oxidation number?



156. Oxidation number of free magnesium (Mg) is:



157. Oxidation number of Mn in KMnO₄ is:



158. Which step is irrelevant when balancing redox equations by oxidation number method?



159. In electrolytic cell, a salt bridge is used in order to:



160. In electrolysis of aqueous CuCl₂, the metal deposited at cathode is:



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