Question
Identify thermal dissociation compound, amphoteric oxide and non-electrolyte
Choose the answer from the list which fits in the description: [CCl4, PbO, NaCl, CuO, NH4Cl] (a) A compound which undergoes thermal…
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Question
Balanced equations for ammonia oxidation, neutralisation and iron sulphide with hydrochloric acid
Convert the following reactions into a balanced chemical equation: (a) Ammonia to nitric oxide using oxygen and platinum catalyst. (b) Sodium hydroxide…
Question
Chemical tests to distinguish cane sugar, hydrated copper sulphate, sulphuric acid and hydrochloric acid
Differentiate between the following pairs based on the criteria given in the brackets: (a) Cane sugar and hydrated copper sulphate [using concentrated…
Question
Arrange CH₄, C₂H₂, C₂H₄ and C₃H₆ by molecular mass; order cations for cathode discharge
Arrange the following according to the instructions given in brackets: (a) C2H2, C3H6, CH4, C2H4 (In the increasing order of the molecular…
Question
Electrolytic refining of copper: anode, deposition and cathode reaction
Answer the following with reference to the electrolytic refining of copper: (a) What is used as the anode? (b) Where is pure…
Question
Calculate: percentage of phosphorus in Ca(H₂PO₄)₂ and empirical formula of C₈H₁₈
Calculate: (a) The percentage of phosphorus in the fertilizer super phosphate Ca(H2PO4)2 correct to 1 decimal point. (b) Write the empirical formula…
Question
Give a reason for each: (a) Ionisation potential decreases down a group. (b) Ionic compounds do not conduct electricity in the solid state. [2]
Give a reason for each: (a) Ionisation potential decreases down a group. (b) Ionic compounds do not conduct electricity in the solid…
Question
Name the following: (a) Organic compounds having the same molecular formula but different structural formulae. (b) A group of organic compounds in which successive members differ by a CH₂ group. [2]
Name the following: (a) Organic compounds with same molecular formula but different structural formula. (b) Group of organic compounds where the successive…
Question
State one relevant observation in each case: (a) To copper nitrate solution, add a few drops of sodium hydroxide solution and then excess sodium hydroxide solution. (b) Burning ammonia in excess oxygen. (c) Passing dry ammonia gas over heated lead(II) oxide. [3]
State one relevant observation for each of the following: (a) To the copper nitrate solution, initially few drops of sodium hydroxide solution…
Question
Choose the substances given in the box below to answer the following questions:
Choose the substances given in the box below to answer the following questions: Iron Magnesium sulphite Zinc Sodium sulphide Lead Ferric chloride…