Potassium is kept-
1. Under cold water.
2. In ammonia.
3. In alcohol.
4. In kerosene.
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Nitrolim (a nitrogenous fertilizer) is a mixture of-
1. Calcium carbide and calcium cyanamide.
2. Calcium oxide and calcium carbide.
3. Calcium cyanamide and carbon.
4. Calcium oxide and carbon.
The strongest base among the following is-
1.
2.
3.
4.
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Ca, on exposure of the moist air, forms a layer on its surface as :
1.
2.
3.
4. CaO
The incorrect statement regarding Be(II group) is -
1. It forms an ionic carbide.
2. Its carbonate decomposes on heating.
3. Its halides are covalent.
4. It is easily attacked by water.
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Lithium has the minimum tendency to form ion. The aqueous solution of lithium is the:
1. Strongest reducing agent.
2. Poorest reducing agent.
3. Strongest oxidising agent.
4. Poorest oxidising agent.
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Calcium hydride can be obtained by heating :
1. Calcium oxide with hydrogen.
2. Calcium oxide with hydrogen under pressure.
3. Calcium with hydrogen under pressure.
4. Calcium with hydrogen at a very low temperature.
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Calcium hydroxide upon reacting with moist chlorine forms-
1.
2.
3.
4.
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A blue coluored solution of an alkali metal in liq NH3 is due to the presence of -
1. atoms.
2. ions .
3. Solvated anions .
4. Solvated electrons.
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Alkali metal ions are-
1. Diamagnetic and coloured.
2. Diamagnetic and colourless.
3. Paramagnetic and coloured.
4. Paramagnetic and colourless.
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