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Choose the letters L, M, N, O & P to match the description (a) to (c) given below: [L – Ammonia, M – Nitrogen, N – Hydrogen sulphide, O – Hydrogenchloride gas, P – Nitrogen dioxide] (a) When this gas comes in contact with ammonia dense white fumes are seen. (b) The gas that turns moist lead acetate paper silvery black. (c) The gas produced on heating lead nitrate.
Smith wrote the following statements incorrectly. Insert a word to correct the statements. (a) Lead bromide conducts electricity. (b) Copper reacts with nitric acid to form nitrogen dioxide gas. (c) Bromoethane reacts with sodium hydroxide to produce ethanol and sodium bromide.
Match the Column A (showing the properties of H2SO4) with Column B (showing the reaction of H2SO4)
You are provided with some compounds in the box. SO2, PbO, CO, K2SO4, H2SO4, CH3COOH, NaHSO4, KCl Choose the compound from the above box that fits the descriptions from (a) to (c). (a) An acid present in vinegar. (b) An oxide which dissolves in water forming an acid. (c) A salt formed by the incomplete neutralization of an acid by a base.
Draw the dot and cross structure of the following: (a) Hydronium ion (b) Oxygen molecule (c) Calcium oxide [Atomic number: H = 1, O = 8, Ca = 20]
Given below is the diagram for the laboratory preparation of Nitric Acid. (a) Name the reactant labelled Y. (b) Write a balanced equation for the reaction between Y and KNO3. (c) The complete apparatus is made up of glass. Why? (d) State why concentrated HNO3 appears slightly yellowish in colour when left standing in a glass bottle for a long time.
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