D90/P2/Q5
A new element Z ,thought to be a halogen,has been discovered.Its relative atomic mass is found to be 370.
Which of the following are likely properties of Z ?
A. dark green gas which is soluble in water
B. black liquid which boils giving a dark brown gas
C. white solid which reacts with an acid giving hydrogen
D. grey solid which explodes on contact with hydrogen
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Answer: Answer is D. Since Z is a halogen, it should be heavier than Iodine and black in colour with high metlting point
Recall that Colours of Group VII elements gets darker on going down the group, with increasing melting point
