Assertion :It is hotter over the top of a fire than at the same distance on the sides. Reason: Air surrounding the fire conducts more heat upwards.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct but Reason is incorrect
Both Assertion and Reason are incorrect
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C
Assertion is correct but Reason is incorrect
D
Both Assertion and Reason are incorrect
Open in App
Solution
Verified by Toppr
Heat is carried away from a fire sideways mainly by radiation. Above the fire, heat is carried by both radiations and also by the convection of air. The latter process carries much more heat. So the assertion is correct but the reason is incorrect.
Was this answer helpful?
0
Similar Questions
Q1
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
Q2
ASSERTION: n-Pentane and n-Hexane belong to a homologous series.
REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - CH2 - group.
View Solution
Q3
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
Q4
Assertion: Be and Al have similar properties.
Reason: Be2+ and Al3+ have nearly the same charge/volume ratios and similar polarising power.
View Solution
Q5
Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells. Reason: A shell can have maximum 2n2 electrons.