Question

70. Which of the following is incorrect in decreasing order of K, value CH,> NH > H2O > HF 2) HI > HBr > HCI > HF 3) CHz - OH > CH3 - NH, > CH3 - F > CH3 -CH, 4) ph-OH > H20 > CH3-CH2 > CH3 -C=C-H ✓ 1 OH -​

Answer 1

Answer:

Answer is 1

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Answer 2

The following which is incorrect in decreasing order of Ka value:

1) $CH_4>NH_3>H_2O>HF$

• The order is incorrect because among $CH_4,NH_3,H_2O,HF$, hydrides are the most electronegative. The pka value of $CH_4$ is more, therefore, it is the weakest acid and the pka value of $HF$ is least, therefore, the Ka value will be more hence it is the strongest acid.
• When it comes to electronegativity then Fluorine is the most electronegative hence the power of donation of electrons will be least and hence it is the strongest acid and the Ka value is much higher.