MEDIUM
9th Foundation
IMPORTANT
Earn 100

Observe the schematic atomic structures of three elements P, Q and R:

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Which of the following statements are correct?

I. R can form RCI3 and RCI5.
Il. Q exists in monatomic form.
Ill. P and R combine to form P3R type of compound.
IV. P and Q combine to form PQ2 type of compound.
V. P will gain two electrons to form a stable compound.

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Important Questions on SOF National Science Olympiad

EASY
9th Foundation
IMPORTANT

Two different fields X and Y were treated with two different substances to increase crop yield. Amount of humus in their respective fields was observed for a period of time as shown in the given graph.

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Select the incorrect statement regarding substances applied in both fields X and Y.

EASY
9th Foundation
IMPORTANT

Identify M-P in the given flow chart and select the correct statement regarding them.

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