Which of the following is in liquid form at room temperature?
Lithium
Sodium
Francium
Cerium
Which of the following is in liquid form at room temperature?
Sodium metal is kept under |
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Which of the following are the ingredients of gun metal? |
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From which mineral is radium obtained? |
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What is laughing gas? |
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Actinides are the elements with atomic numbers from |
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The two elements that are frequently used for making transistors are |
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The filament of an electric bulb is made of |
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Diamond is an allotropic form of |
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In fireworks, the green flame is produced because of |
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Permanent hardness of water can be removed by adding |
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