Which of the following elements is not-radioactive?
1 Uranium
2 Thorium
3 Plutonium
4 zirconium
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Which of the following substances exhibit the property of sublimation? 1 Ice 2 Wax 3 Camphor 4 Ethyl alcohol
How does common salt help in separating soap from the solution after saponification ? 1 By decreasing solubility of soap 2 By increasing solubility of soap 3 By decreasing density of soap 4 By increasing density of soap
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Which gas is used for preparation of soda water? 1 Ammonia 2 carbon dioxide 3 Hydrogen 4 Nitric oxide
Permanent hardness of water may be removed by the addition of 1 Alum 2 Sodium carbonate 3 Lime 4 Potassium permanganate
Wood is the main raw material for the manufacture of 1 Paint 2 Paper 3 Ink 4 Gun powder
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Which of the following is called a strategic metal? 1 Silicon 2 Germanium 3 Titanium 4 Uranium
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Which of the following is not a neutral oxide? 1 Carbon monoxide 2 Sulphur dioxide 3 Nitric oxide 4 Water
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