Given below are two statements : Statement I: The boiling point of hydrides of Group 16 elements follow the order H 2 O H 2 Te H 2 Se H 2 S. Statement II: On the basis of molecular mass, H 2 O is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in H 2 O, it has higher boiling point. In the light of the above statements, choose the correct answer from the options given below :

Question

Given below are two statements : Statement I: The boiling point of hydrides of Group 16 elements follow the order H 2 O > H 2 Te > H 2 Se > H 2 S. Statement II: On the basis of molecular mass, H 2 O is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in H 2 O, it has higher boiling point. In the light of the above statements, choose the correct answer from the options given below :

cdquestions Admin · Accepted Answer

1. The boiling point order is determined by molecular mass and hydrogen bonding. 2. $H_2O$ has extensive hydrogen bonding, giving it the highest boiling point. 3. Heavier hydrides ($H_2Te$, $H_2Se$, $H_2S$) follow boiling point trends based on molecular mass.

Answer

Both Statement I and Statement II are true

Answer

Both Statement I and Statement II are false

Answer

Statement I is true but Statement II is false

Answer

Statement I is false but Statement II is true

List I		List II
A	Robert May	I	Species-Area relationship
B	Alexander von Humboldt	II	Long term ecosystem experiment using out door plots
C	Paul Ehrlich	III	Global species diversity at about 7 million
D	David Tilman	IV	Rivet popper hypothesis

List I		List II
A	Mesozoic Era	I	Lower invertebrates
B	Proterozoic Era	II	Fish & Amphibia
C	Cenozoic Era	III	Birds & Reptiles
D	Paleozoic Era	IV	Mammals

The Correct Option is A

Solution and Explanation

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