Q: The electronic configuration of halogens in their valence shell is:

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

Q: The oxidation number of chlorine in KClO is:

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

Q: The number of p-electrons in bromine atom is:

\$Br - Z=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 1

The electronic configuration of halogens in their valence shell is:

Accepted Answer

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

Question 2

Fluorine does not show variable oxidation states because_________

Accepted Answer

Fluorine cannot expand its octet due to absence of d-orbitals. Therefore it cannot show variable oxidation states.Option B is correct.

Question 3

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 4

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 5

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.$\therefore$ x+1+(-2) = 0$\therefore$ x = +1 Thus, oxidation state of chlorine in potassium chlorate is +1.

Question 6

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 7

Which one of the following is a true peroxide?

Accepted Answer

The compound which has peroxide linkage is called peroxide.Here, in $H_{2}O_{2}$ there is a peroxide linkage $(-O-O-)$. Thus it is true peroxide.Option D is correct.

Question 8

The number of p-electrons in bromine atom is:

Accepted Answer

$Br - Z=35$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 9

The halogen which can displace three halogens from their compounds is:

Accepted Answer

F can displace all other halogens from their compounds i.e three halogens this is because of small size and high electronegativity of fluorine.

Question 10

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

The P Block Elements

Chemistry
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The electronic configuration of halogens in their valence shell is:

Fluorine does not show variable oxidation states because_________

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:

The oxidation number of chlorine in KClO is:

The halogen which can form both cations and anions is:

Which one of the following is a true peroxide?

The number of p-electrons in bromine atom is:

The halogen which can displace three halogens from their compounds is:

Fluorine shows anomalous behavior in VIIA group due to:

The P Block Elements

Chemistry 5380 Views

The electronic configuration of halogens in their valence shell is:

Fluorine does not show variable oxidation states because_________

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:

The oxidation number of chlorine in KClO is:

The halogen which can form both cations and anions is:

Which one of the following is a true peroxide?

The number of p-electrons in bromine atom is:

The halogen which can displace three halogens from their compounds is:

Fluorine shows anomalous behavior in VIIA group due to:

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