13. Which of the following pair have molecules having the same ratio of electron and proton ? 1> NH3 , PH3 2> H20 ,NH3 3> H2O , PH3 4> H2S , NH3

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How many molecules have the same type of shape from the following molecules?
$H_{3} O^{+}, N H_{3}, C l O_{3}^{-}, P H_{3}, H_{2} O, ¯ C H_{3}$ ___

The order of boiling point of $N H_{3}, H_{2} O, H F a n d P H_{3}$ is

1. S b H_{3} > N H_{3} > A s H_{3} > P H_{3}

2. N H_{3} > P H_{3} > A s H_{3} > S b H_{3}

3. N H_{3} > P H_{3} > A s H_{3} > S b H_{3}

4. N H_{3} > P H_{3} > A s H_{3} > S b H_{3}

The increasing order of enthalpy of vaporization of NH₃, PH₃, and AsH₃ is

1. S b H_{3} > N H_{3} > A s H_{3} > P H_{3}

2. N H_{3} > P H_{3} > A s H_{3} > S b H_{3}

3. N H_{3} > P H_{3} > A s H_{3} > S b H_{3}

4. N H_{3} > P H_{3} > A s H_{3} > S b H_{3}

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