Question

7. Sodium and potassium react with
8. Silicon dioxide is used for making glass.
9. The black material inside a pencil is
called mercury
10. Stainless steel is highly malleable and
strong substance, which is rust proof.
utions​

Answer 1

Answer:

7. Water to produce hydrogen gas.

8. Yes, it is used to make glass.

9. The black material inside the pencil is known as graphite.

10. Stainless steel helps not to settle the rust. And it is a mixture of alloy.

Explanation:

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