HARD

11th CBSE

IMPORTANT

Earn 100

The electron affinity of bromine is $3.36 e V$ . How much energy in $kcal$ is released when $8 g$ of bromine is completely converted to ${Br}^{-}$ ions in the gaseous state? ( $1 e V = 23.06 kcal {mol}^{- 1}$ ).

Important Questions on Classification of Elements and Periodicity in Properties

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>PROBLEMS FOR PRACTICE>Q 2

The amount of energy released when one million atoms of iodine are completely converted into

I^{-}

ions in the vapour state according to the equation,

I (g) + e^{-} \overset{}{\to} I^{-} (g)

4.9 \times 10^{- 13} J

. Calculate the electron affinity of iodine in

kJ {mol}^{- 1}

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>PROBLEMS FOR PRACTICE>Q 3

The amount of energy released when one million atoms of iodine are completely converted into

I^{-}

ions in the vapour state according to the equation,

I (g) + e^{-} \overset{}{\to} I^{-} (g)

4.9 \times 10^{- 13} J

. Calculate the electron affinity of iodine in

e V

per atom.

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>PROBLEMS FOR PRACTICE>Q 1

Arrange the elements with the following electronic configuration in order of increasing electron gain enthalpy.
(i)

1 s^{2} 2 s^{2} 2 p^{5}

(ii)

1 s^{2} 2 s^{2} 2 p^{4}

(iii)

1 s^{2} 2 s^{2} 2 p^{3}

(iv)

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{4}

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>PROBLEMS FOR PRACTICE>Q 2

Arrange the following elements in order of decreasing electron gain enthalpy:

$B, C, N$ and $O$

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>PROBLEMS FOR PRACTICE>Q 4

The electron gain enthalpies of halogens decreases in the order of

F > Cl > Br > I

comment upon statement.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>PROBLEMS FOR PRACTICE>Q 1

Predict the formula of the binary compound that would be formed by the following pairs of elements?
Calcium and oxygen.

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>PROBLEMS FOR PRACTICE>Q 1

Predict the formula of the stable binary compound that would be formed by the following pairs of elements:

Aluminium and carbon.

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 3 - Classification of Elements and Periodicity in Properties>PROBLEMS FOR PRACTICE>Q 2

Predict the formula of the stable binary compound formed by the following pairs of elements:
Element with

Z = 116

and hydrogen.

The electron affinity of bromine is 3.36 e V. How much energy in kcal is released when 8 g of bromine is completely converted to Br- ions in the gaseous state? (1 e V=23.06 kcal mol-1).

Important Questions on Classification of Elements and Periodicity in Properties

Learn and Prepare for any exam you want !

The electron affinity of bromine is $3.36 e V$ . How much energy in $kcal$ is released when $8 g$ of bromine is completely converted to ${Br}^{-}$ ions in the gaseous state? ( $1 e V = 23.06 kcal {mol}^{- 1}$ ).