Chemistry - Miscellaneous

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111. The gas used in welding and cutting metal is (NTSE Chandigarh, Stage-I, 2015-16)

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112. A silvery white metal X reacts with water at room temperature to produce a water soluble compound Y and a colourless gas Z. The reaction is highly exothermic and the Z catches fire immediately during the reaction. The solution of Y in water on reacting with stoichiometric amount of dilute solution of hydrochloric acid gives a solution of pH = 7.0. The compounds X, Y and Z respectively are (NTSE Stage-II,2014-15)

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113. An element X has electronic configuration 2, 8, 1 and another element Y has electronic configuration 2,8,7. They form a compound Z. The property that is not exhibited by Z is (NTSE Stage-II, 2015-16)

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114. The compound containing both ionic and covalent bond is (NTSE Stage-II,2015-16)

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