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De’s Foundation OBJECTIVES QUESTIONS

A) Name the following :1. The chemical effect on electric current 2. A positive ion 3. A positive electrode 4. A negative ion. 5. A negative electrode. 6. Process of an ion formation. 7. The process of separation ions further. 8. An instrument that reads current. 9. The instrument records Potential difference 10. An instrument in which electrolysis takes place 11. An instrument for regulating current. 12. Product at the anode of acidified water. 13. Product at cathode of acidified water. 14. Product at anode of fused lead bromide. 15. Product at cathode of fused lead bromide. 16. Nature of anode during electrolysis of acidified water. 17. Nature of cathode during electrolysis of acidified water. 18. Name of electrolyte in the process of nickel plating. 19. Name the electrolyte in the process of silver plating. 20. The electrolyte in the preparation of sodium hydroxide industrially. 21. The electrode in the above process. 22. The deposit obtained in the refining of copper and nickel. 23. Three important metals in anode mud. 24. The process for obtaining highly electropositive metals. 25. The arrangement of metals according to reactivity. 26. A liquid that does not conduct electricity. 27. The cell in which aluminium is extracted. 28. The electrolyte in the Hall Heroult cell. 29. The anode used in the extraction of aluminium. 30. The cathode used in the extraction of aluminium. 31. Compound containing replaceable hydrogen, replaced by a metal. 32. Compound having O2- or OH- ions. 33. The number of replaceable hydrogen atoms in acid. 34. OH- ions in a base. 35. The products of H+ ion reacting with OH- ion. 36. The positive particles formed when acid dissolves in water. 37. Acids that ionize completely on minimum dilution. 38. Acids whose ionization continues with dilution. 39. Acids that have hydrogen and another non-metal. 40. Acids which have hydrogen, a non-metal radical with oxygen. 41. Salts that have replaceable hydrogen. 42. Salts containing O2 or OH- ions. 43. Salts containing two different positive ions. 44. Method of preparing salts by finding matching volume of acid and alkali. 45. Two classes of compounds that have all their salts soluble. 46. Three insoluble chlorides. 47. Three insoluble sulphates. 48. The method of salt preparation by precipitation. 49. The reaction between an acid and a base. 50. The devise that prevents oxidation of ferrous salts whilst they are prepared. 51. Naturally occurring sodium chloride.

ICSE Chemistry


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De’s Foundation

ICSE Chemistry

52. Method of preparing anhydrous chlorides. 53. Method of preparing carbonates of metals other than sodium and potassium. 54. A monoacidic base. 55. Number of protons in the nucleus of an atom. 56. Particles inside the nucleus. 57. Atoms with same protons different neutrons. 58. Arrangement of electrons in respective shells of atoms. 59. Element with zero valency. 60. Electrons lost or gained by an atom in compound formation. 61. Electrons shared with an atom in compound formation. 62. A pair of electrons available for coordinate bonding. 63. A molecule where one atom is more electronegative than another and shares an electron pair. 64. Two molecules which are polar. 65. Solvents for molecules which are polar. 66. Solvents for molecular compounds. 67. An acid gas with a double bound. 68. A molecule with little affinity. 69. Elements with 1, 2, or 3 electrons in the last shell. 70. Elements with 4, 5, 6 or 7 electrons in the last shell. 71. Elements with 8 electrons in the last shell. 72. Elements where the penultimate shell is being filled with electrons. 73. The law that groups elements in family of threes. 74. The law where every 8th elements repeats properties. 75. The law where repetition of properties varies periodically. 76. The physical quantity on which modern periodic table is based. 77. Horizontal arrangement of elements. 78. Vertical arrangement of elements. 79. Contraction in volume with increase in atomic number. 80. Elements whose atomic volumes are large. 81. Elements whose volumes are small. 82. Lightest metal in periodic table. 83. The element that is difficult to take place in the periodic table. 84. The relationship between boron and silicon. 85. The old name of germanium. 86. The scientist who related atomic number with X-ray spectral lines. 87. Two non-metals with high melting points. 88. Name given to elements of group VII A. 89. An element that acts as a promoter in the industrial preparation of ammonia. 90. Two chemicals used to make ammonia in the laboratory. 91. Catalyst used in the synthesis of ammonia. 92. The compound used to dry ammonia. 93. Two compounds that react with water to give ammonia gas. 94. A fertilizer that reacts slowly with the moisture to give ammonia. 95. An element that is formed when ammonia burns. 96. A substance used to identify ammonia. 97. Three compounds that gives white fumes with ammonia. 98. The gas formed when ammonia reacts with copper oxide. 99. The catalyst used to oxidize ammonia to nitric oxide. 100. The compound formed along with nitric acid when it is prepared in the laboratory. 101. The compound that makes laboratory acid yellow. 102. A nitrate which does not give nitrogen dioxide on heating. 103. A nitrate which on heating gives two gases and leaves behind a solid yellow residue. 104. A nitrate which on heating leaves no solid residue. 105. A fertilizer made by rain water.


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De’s Foundation

ICSE Chemistry

106. A fertilizer made by combining ammonia and carbon dioxide. 107. A nitrogenous fertilizer that contains phosphorous. 108. A fertilizer made by burning leaves. 109. Three dying agents that cannot dry ammonia. 110. Two metal ions that form complex ions with ammonia hydroxide. 111. Three oxides that can be reduced by ammonia. 112. A metal that gives hydrogen gas with very dilute nitric acid. 113. An acid that renders iron passive. 114. The acid added to nitric acid to give aqua regia. 115. Two chemicals used to test a nitrate in the brown ring test. 116. The substance that appears as the brown ring. 117. Name two nitrates that have difficulty in giving brown ring. 118. Elements whose atoms lose electrons. 119. Elements whose atoms gain electrons. 120. Metal having the highest melting point. 121. A metal with the lowest melting point. 122. The element used in filaments lamps. 123. The most elastic substance among metals alloys. 124. Non-metal with highest melting point. 125. The lightest element. 126. Metal with highest density. 127. The lightest solid at room temperature. 128. The most ductile metal. 129. The malleable metal. 130. The best conductor of heat and electricity. 131. The non-metal that conducts electricity. 132. Solvent for Bauxite. 133. A compound used to lower fusion temperature of alumina. 134. An ore that can be enriched by froth floatation process. 135. The process that removes all gaseous impurities from an enriched ore. 136. The process of removing the oxygen from calcined ore. 137. A metal that is brittle at room temperature. 138. A solution that which is a mixture of metals of metals or metals and non-metals put together to obtain specific properties. 139. The alloy that reduces eddy currents. 140. The alloy that is used in reflecting telescopes. 141. Alloy that is acid resistant. 142. Two metals that coat cutlery. 143. Alloy used in railway lines. 144. An alloy used in bullet shells. 145. An alloy used in powerful magnets. 146. Two alloys used to make aircrafts bodies. 147. An alloy with a low melting point. 148. An alloy used in surgical steel. 149. The alloy in the school bell. 150. (a) The allotropes of sulphur. (b) Of these which is the most stable at room temperature? (c) Which is used in the vulcanizing of rubber? (d) Which two show enantiotropy? 151. (a) Name two solvents of sulphur. (b) Name an allotrope of sulphur that does not dissolve in all the above named solvents. 152. A process used to extract sulphur from earth. 153. Two compounds which are rich sources of sulphur. 154. A gas which has acidic, oxidizing and reducing properties.


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De’s Foundation

ICSE Chemistry

155. Two acids that liberate sulphur dioxide from sulphites 156. An acid that cannot be used to obtain sulphur dioxide from sulphites. 157. Two metals which burn in sulphur dioxide. 158. The solution which turns colourless when sulphur dioxide is bubbled through it. 159. An orange solution which turns green when sulphur dioxide gas is passed through it. 160. The green solution which forms in above question. 161. A salt which is extensively used to bleach wood pulp. 162. An element which is used in horticulture to control fungi and mould. 163. An oxide and hydrides of element that react to give the element. 164. The ion present in a solution which turns from yellow to green, when sulphur dioxide gas is bubbled through it. 165. A gas that turns potassium permanganate colourless and gives a yellow deposit. 166. An element and a chemical compound that can convert sulphur dioxide to sulphur trioxide at a temperature of about 4500C. 167. A gas that is used in preservation of food. 168. The chemical name and a common name of a reagent used in photographic work. 169. A gas that has a smell of rotten eggs. 170. A metal that is easily tarnished by the gas that has the smell of rotten eggs. 171. A gas which when it reacts with hydrogen sulphites gives a yellowish white precipitate. 172. Three black sulphites. 173. Three white sulphites. 174. The chemical used to test hydrogen sulphide. 175. An acid that has an oily appearance and reacts with water to produce large amounts of heat. 176. Two acids that oxidize carbon to carbon dioxide. 177. An acid that has chars sugar. 178. An acid that is widely used in the transport industry. 179. An acid used to concentrate other acids. 180. A chemical used to test sulphuric acid. 181. A gas that exhibits allotropy. 182. A crystal that is octahedral. 183. A gas which is a dibasic acid. B) Name a Compound/Compounds of Chlorine: 1. Which is a reducing agent. 2. Which is an explosive. 3. Which is a weed killer. 4. Which is a disinfectant. 5. Which is used to make a catalyst. 6. Which are three insoluble chlorides. 7. Which is soluble in hot water and insoluble in cold water. 8. Which does not dissolves in hot or cold water but dissolves in ammonium hydroxide. 9. Which is used as a refrigerant. 10. Which is an anaesthetic. 11. Which gives a pink solution. 12. Which is deep green in colour. 13. Which gives a dirty green precipitate with sodium hydroxide solution. 14. Which gives a reddish brown precipitate with sodium hydroxide solution. 15. The solution of which gives a white precipitate with sodium hydroxide and precipitate is insoluble in excess. 16. The solution of which appears deep green in colour. It gives a blue precipitate and then gives an intense blue solution with ammonium hydroxide. 17. Whose solution does not give a precipitate with sodium hydroxide but on warming gives a basic gas. 18. Which combines with a non-metallic hydride to form dense white fumes. 19. Which are electrolyzed to obtain reactive metals.


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De’s Foundation

20. Which liberates chlorine on exposure to air. 21. Which are highly deliquescent. 22. Which on exposure to sunlight gives oxygen gas. 23. Which is used to make plastic articles. 24. Which is a poison. 25. Which is used to disperse an unruly mob. 26. Which is a liquid and has a density of more than 2g/cm3 27. Which is used as a fire extinguisher. 28. Which is extremely soluble in water. 29. Which with sulphites liberates sulphur dioxide. 30. Which converts sodium sulphite to sodium sulphate. 31. Which is used to pickle metals. 32. Used to clean toilets. C) Give the name of the compound, class of compounds or processes in the following:1. Compound containing hydrogen and carbon only. 2. A family of related compounds. 3. The ability of an atom to combine with its own type. 4. Compounds that have single bonds only. 5. Compounds that have general formula CnH2n+2. 6. Compounds having the general formula CnH2n. 7. Compounds having general formulae CnH2n-2. 8. The formula that shows the arrangement of the atoms in space. 9. Compounds having same molecular formulae but different structural formulae. 10. Open chain alkanes and alkenes. 11. Closed chain alkanes and alkenes. 12. The alcohol in alcoholic drinks. 13. The compounds formed by one step oxidation of an alcohol. O

14. The name of compounds that have the O C

C

OH

group.

O

H

C

OH

15. ---OH; , 16. Common name for methanoic acid. 17. Common name for ethanoic acid. 18. Removal of double bond and conversion to single bond by adding hydrogen. 19. Obtaining elements from a compound. 20. Breaking a long molecule into a smaller one. 21. Using a parent molecule to form a chain. 22. Liquor which is poisonous. 23. A substance that makes liquor spurious. 24. IUPAC. CH CH

CH

CH

CH

25.

CH

ICSE Chemistry

OBJECTIVE CHEMISTRY FOR ICSC  

chemistry through oblective question for icse preparation

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