Which of the following statements is not...

Which of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic Table.

Text Solution

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(c) The atoms lose their valence electrons with difficulty and not easily. This is on account of the reason that
nuclear charge increases from left to the right since the atomic number of the elements gradually increases.
with the increase in nuclear charge, the force binding the electrons with the nucleus increases. Therefore, the atoms lose their valence electrons with difficulty.

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Which of the following statements is incorrect statement about the trends when going from left to right across the periods of modern periodic table?

The number of valence electrons increases.

The atoms lose their electrons more easily

The oxides become more acidic

The elements become less metallic in nature.

Which of the following statement is correct about the half life period?

It is proportional to initial concentration for zeroth order

Average life= 1.44 half life for first order reaction.

Time to complete `75%` reaction is thrice of half life period in second order reaction.

`99.9%` of reaction takes place in 100 minutes for the case when rate constant is `0.0693 min^(-1)`

Which of the following statements are correct about halr-period ?

It is proportional to intial concentration for zeroth order

Average life `=1.44xx` half-life for first order reaction.

Tiem of `75%` comletion of reaction is thrice of halr-life (intial harl-life) period in second order reaction

`99.9%` reaction takes place in `100` minutes for the case when reate constant is `0.693 min^(-1)`