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Which of the following elements shows the highest number of allotropes?

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Important Questions on The p-Block Elements

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Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 77
With respect to protonic acids, which of the following statement is correct?
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Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 78

Phosphorus is manufactured by heating in an electric furnace a mixture of:

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Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 79
Which of the following may Ignite spontaneously in the air?
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Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 80
Crown shape of S8 molecule is present in:
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Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 81
Presence of ozone in a gas sample may be detected by:
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Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 82
Phosphine is generally prepared in the laboratory by
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Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 83
Cyanamide process is used in the formation of
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Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 84
Ammonium nitrate decomposes on warming into: