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Chemistry - Metals and Non-metals

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31. Amalgam is (NTSE Uttar Pradesh, Stage-I, 2016-17)

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32. Which one of the following metal oxides show both acidic and basic characters? (NTSE Uttar Pradesh, Stage-I, 2016-17)

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33. An element which shows allotropy when burnt in air gives a gas with characteristic smell. The gas turns blue litmus red and is used as an insecticide. The element is (NTSE Haryana, Stage-I, 2016-17)

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34. An alloy of Zn and Cu is dissolved in dil HCI. Hydrogen gas is evolved. In this evolution of gas. (NTSE Jharkhand, Stage-I, 2016-17)

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35. Metals in the middle of the activity series can be easily extracted from their (NTSE Rajasthan, Stage-I, 2015-16)

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Metals and Non-metals