Which of the following statement are cor...

Which of the following statement are correct ?

The electronic configuration of `Cr` is `[Ar]3d^(5), 4s^(1)` (atomic number of Cs = 24)

The magnitic quantum number may have a negative value

In silver atom `23` electron have spin of one type and `24` of the opposite type .(Atomic number of `Ag = 47)`

The oxidation state of nitrogen in `NH_(3)` is `-3`

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The correct Answer is:

A, B, C

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Which of the following statements are correct?

only I

only II

both I and II

Neither I nor II

Frrimagnetic substances lost ferrimagnetism on heating and become paramagnetic.

Ferrimagnetic substances do not lose ferrimagnetism on heating and remain ferrimagnetic .

Antiferromagnetic substances have domain structures similar to ferromagnetic substances and their magnetic moments are not cancelled by each other .

In ferromagnetic substances, all the domains get oriented in the direaction of magnetic field and remain as such even after removing magnetic field.

`H_(2)O_(2)` reduces `MnO_(4)^(-)` both in acidic and basic media

`H_(2)O_(2)` oxidises `Fe^(2+)` ions both in acidic and basic media

`H_(2)O_(2)` oxidises `Mn^(2+) ` to `Mn^(4+)` ions in basic medium

`H_(2)O_(2)` liberates `I_(2)` from acidified KI solution and reduces `I_(2)` to `I^(-)` ions in basic medium.