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Which among the following is the main constituent of malleable metal alloy Pewter ?

[A] Copper
[B] Zinc
[C] Tin
[D] Bismuth

Correct Answer: C [Tin]

Which among the following is the lowest atomic number element without any stable isotopes?

[A] Technetium
[B] Molybdenum
[C] Ruthenium
[D] Niobium

Correct Answer: A [Technetium]
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