Question 1

The oxidation number of chlorine in KClO is:

Accepted Answer

\overset{+1}{K}Cl\overset{-2}{O} oxidation state of alrali metals = +1oxygen = -2Let oxidation state of chlorine is x. 	herefore  x+1+(-2) = 0 	herefore  x = +1 Thus, oxidation state of chlorine in potassium chlorate is +1.

Question 2

Assertion (A): Oxygen exhibits anomalous behavior. Reason (R): Absence of d-orbitals

Accepted Answer

Oxygen exhibits anomalous behaviour due to its small size, high electronegativity and absence of d-orbitals.

Question 3

Anomalous behaviour of oxygen, compared to other VIA group elements is due to:

Accepted Answer

Oxygen is the first element of VI A group and shows Anaomalous behaviour than other group elements because1:High Electronegativity2:small atomic size3:Non-avalability of d-orbits results in different compounds than their other group elements.

Question 4

Fluorine shows anomalous behavior in VIIA group due to:

Accepted Answer

Second period elements show anomalous behavior due to small size, high electronegativity and absence of d-orbitals and fluorine is a second period element

Question 5

According to Coulson the high reactivity of fluorine than other halogens is because of its:

Accepted Answer

According to Coulson, since fluorine atoms are small it's intermolecular repulsion is appreciable. The large electron-electron repulsion between the lone pairs of electrons on the fluorine atom weakens the bond.

Question 6

Which of the following halogens does not form oxyacids at room temperature?

Accepted Answer

Fluorine does not hove d-sub shell so it can only have one oxidation state. Therefore, it cann't form oxy acids. Fluorine is the most electronegative element and always show  -1  oxiadation state. In oxyacids. reast of the halogens have positive oxidation state.

Question 7

The number of p-electrons in bromine atom is:

Accepted Answer

Br - 35 Its electronic configuration is given as: 1s^22s^22p^63s^23p^64s^23d^{10}4p^5 So, total p-electrons =6+6+5= 17

Question 8

The halogen which can form both cations and anions is:

Accepted Answer

Iodine can form both cations, as well as anions. Iodine can form cations due to the poor shielding effect of d orbitals where electrons can be removed from the valence shell and the cation is formed.The cations and anions of Iodine is represented as follow:  I^{-}  and   I^{+}

Question 9

The electronic configuration of halogens in their valence shell is:

Accepted Answer

\underline{Halogens} Electronic  configuration in their valence shells = ns^{2}  np^{5}

Question 10

In the third excited state, the number of unpaired electrons in chlorine atom is:

Accepted Answer

The general electronic configuration of chlorine is  [Ne] 3s^{2} 3p^{5} .When electrons are excited in chlorine, the electrons enter into 3d subshell then the electronic configuration of chlorine is given as: [Ne] 3s^{1} 3p^{3} 3d^{3} Thus the number of unpaired electrons will be 7.

The P Block Elements

Chemistry
194 Views

The oxidation number of chlorine in KClO is:

Assertion (A): Oxygen exhibits anomalous behavior.
Reason (R): Absence of d-orbitals

Anomalous behaviour of oxygen, compared to other VIA group elements is due to:

Fluorine shows anomalous behavior in VIIA group due to:

According to Coulson the high reactivity of fluorine than other halogens is because of its:

Which of the following halogens does not form oxyacids at room temperature?

The number of p-electrons in bromine atom is:

The halogen which can form both cations and anions is:

The electronic configuration of halogens in their valence shell is:

In the third excited state, the number of unpaired electrons in chlorine atom is:

The P Block Elements

Chemistry 194 Views

The oxidation number of chlorine in KClO is:

Assertion (A): Oxygen exhibits anomalous behavior. Reason (R): Absence of d-orbitals

Anomalous behaviour of oxygen, compared to other VIA group elements is due to:

Fluorine shows anomalous behavior in VIIA group due to:

According to Coulson the high reactivity of fluorine than other halogens is because of its:

Which of the following halogens does not form oxyacids at room temperature?

The number of p-electrons in bromine atom is:

The halogen which can form both cations and anions is:

The electronic configuration of halogens in their valence shell is:

In the third excited state, the number of unpaired electrons in chlorine atom is:

Chemistry
194 Views

Assertion (A): Oxygen exhibits anomalous behavior.
Reason (R): Absence of d-orbitals