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A student forgot to add the reaction mixture to the round bottomed flask at 27 °C but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake, and using a pyrometer he found the temperature of the flask was 477 °C. What fraction of air would have been expelled out?
  • a)
    3/5
  • b)
    1/ 2
  • c)
    3/ 7
  • d)
    none
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A student forgot to add the reaction mixture to the round bottomed fla...
Let the volume of  air in the  flask at 27 degree C be V1 & that of the same amount of the gas at 477 degree C be V2.
According to charle’s law
V2/T2  =  V1/ T1   …………………(1)
NOW  volume of gas expelled out = V2 – V1, THEN
Fraction of the gas expelled out = (V2 – V1 ) / V2 = 1- (V1/ V2)     …………….(2)
Also from equation (1)  V1/ V2 = T1/ T2   …………..(3)
Substituting the values of (3) in (2), we get
Fraction of the air expelled  = 1- T1/ T2 = (T2 – T1)/ T2
= 750- 300 /750 = 0.6
Hence, fraction of air expelled out is 0.6 or 3/5 th
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Most Upvoted Answer
A student forgot to add the reaction mixture to the round bottomed fla...
N1×T1=n2×T2
here n1=1 and T1=27+273=300K
n2=? and T2= 477+273=750K
therefore
1×300=n2×750
we get n2= 2/5
fraction of air expelled = 1-n2
that is
= 1-2/5=3/5
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Community Answer
A student forgot to add the reaction mixture to the round bottomed fla...
°C. What will be the effect on the reaction if it is carried out at 40 °C instead?
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A student forgot to add the reaction mixture to the round bottomed flask at 27 °C but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake, and using a pyrometer he found the temperature of the flask was 477 °C. What fraction of air would have been expelled out?a)3/5b)1/ 2c)3/ 7d)noneCorrect answer is option 'A'. Can you explain this answer?
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A student forgot to add the reaction mixture to the round bottomed flask at 27 °C but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake, and using a pyrometer he found the temperature of the flask was 477 °C. What fraction of air would have been expelled out?a)3/5b)1/ 2c)3/ 7d)noneCorrect answer is option 'A'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about A student forgot to add the reaction mixture to the round bottomed flask at 27 °C but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake, and using a pyrometer he found the temperature of the flask was 477 °C. What fraction of air would have been expelled out?a)3/5b)1/ 2c)3/ 7d)noneCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A student forgot to add the reaction mixture to the round bottomed flask at 27 °C but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake, and using a pyrometer he found the temperature of the flask was 477 °C. What fraction of air would have been expelled out?a)3/5b)1/ 2c)3/ 7d)noneCorrect answer is option 'A'. Can you explain this answer?.
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