Which of the following statement is correct?
CHEMISTRY
WAEC 2023
Which of the following statement is correct?
- A. Addition reactions occur between alkanes and chlorine.
- B. Butane has a lower boiling point than propane.
- C. Pentane has five isomers.
- D. An alkane with 49 carbon atoms contains 100 hydrogen atoms
Correct Answer: D. An alkane with 49 carbon atoms contains 100 hydrogen atoms
Explanation
The general formula for alkanes is \(C_nH_{2n}+2\). For an alkane with 49 carbon atoms (n = 49), the number of hydrogen atoms can be calculated as follows:
Number of hydrogen atoms (H) = 2n + 2
Number of hydrogen atoms (H) = 2 * 49 + 2
Number of hydrogen atoms (H) = 98 + 2
Number of hydrogen atoms (H) = 100
So, an alkane with 49 carbon atoms contains 100 hydrogen atoms.
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