Carbon burried under the ocean floor might take this much of time to return to the atmosphere
A) 12 million
B) 14 Million
C) 15 million
D) 10 Million
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How much time does the earth take to move 1° longitude?
(C) 4 minutes
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(i) Chalk contains calcium, carbon and oxygen in the ratio 10:3:12. Find the percentage of carbon in chalk. (ii) If in a stick of chalk, carbon is 3g,
Correct Answer - (i) 12% (ii) 25g
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a. Why is Carbon -14 radioactive while Carbon -12 not? (Atomic number of Carbon: 6) b. Researchers have uncovered the youngest known
(a) Ratio of neutrons to protons is 2.3: 1 which is not the stable ratio of 1:1 (b) Age of fossils can be estimated by C-14 decay. All living organisms have...
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There are 3 isotopes of carbon. Carbon-12, Carbon-13 and Carbon-14. The most abundant carbon isotope is carbon – 12.
Correct option is A) 12.01
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Mohan took lunch at 1 o’ clock. How much time does it take to digest 100%?
(D) 4 – 5 hours
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It is difficult to walk on polished floor because friction between our feet and floor is
Correct option is B) Reduced
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You have collected the information about ocean weeds. Identify the ocean weed from given below names.
(B) Agar-Agar
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If A pump can take 5 hrs to fill a 50 l of tank then how much time to take to fill a 75 liters of tank for the same pump?
Correct option is (D) \(7\,\frac{1}{2}\) hrs \(\because\) Time taken to fill a \(50\,l\) of tank = 5 hours \(\therefore\) Time taken to fill a \(75\,l\) of tank \(=\frac5{50}\times75\;hours\) \(=\frac{75}{10}\;hours\) = 7.5 hours = 7 hours + \(\frac12\) hours = \(7\frac12\) hours
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If A pump can take 5 hrs to fill a 50 l of tank then how much time to take to fill a 75 liters of tank for the same pump?
2 Answers
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Carbon found nature as a mixture of C-12 and C-13. The average atomic mass of carbon is 12.011u. What is the percentage abundance of carbon-12 in natu
Correct Answer - `98.9%`
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