Solve
Guides
0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Standard XII
Chemistry
Allotropes of Phosphorus
Question

Assertion :Red phosphorus is less volatile than white phosphorus Reason: Red phosphorus has a discrete tetrahedral structure
  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  3. Assertion is correct but Reason is incorrect
  4. Both Assertion and Reason are incorrect

A
Assertion is correct but Reason is incorrect
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
D
Both Assertion and Reason are incorrect
Open in App
Solution
Verified by Toppr

Red phosphorus is less volatile than white phosphorus as its tendency to combust spontaneously is much less than white phosphorus.

Thus, Assertion is correct but Reason is incorrect

Hence, the correct option is C

144276_152795_ans.jpg

Was this answer helpful?
0
Similar Questions
Q1
ASSERTION:
ΔfHo for white phosphorus has been taken to be zero, whereas black phosphorus is the most stable allotrope of phosphorus and this is the only exception.

REASON:
The reference standard state of white phosphorus is taken despite the fact that this form is not the most stable allotrope but simply the most reproducible form of phosphorus.
View Solution
Q2
Assertion :Red phosphorus is less volatile than white phosphorus Reason: Red phosphorus has a discrete tetrahedral structure
View Solution
Q3

Assertion (A) Bond angle in ethers is slightly less than the tetrahedral angle.
Reason (R) There is a repulsion between the two bulky (- R) groups.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

View Solution
Q4
Assertion: The compressibility factor for H2​ and He is (1+PbRT)
Reason: The compressibility factor for H2​ and He can be derived from Van der Waal's equation.
View Solution
Q5
Assertion
If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
High biological oxygen demand means low activity of bacteria in water.
View Solution