Chemistry-17-Important Metals

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1.
A Gold Ring which is 50% pure. Its purity can be alternatively shown as __:
2.
Which of the following is the poorest conductor of heat in comparison to other options?
3.
Which of the following is an alkaline earth metal?
4.
The Alkali metals are called good reducing agents. This implies that__:
5.
Which among the following are constituents of Brass?
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