HSC Science (Computer Science) 11th Standard - Maharashtra State Board Question Bank Solutions

Answer the following.

Explain electronegativity and electron gain enthalpy. Which of the two can be measured experimentally?

Choose the correct option.

Consider the elements B, Al, Mg, and K predict the correct order of metallic character:

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The lanthanides are placed in the periodic table at

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If the valence shell electronic configuration is ns²np⁵, the element will belong to

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Which of the following pairs is isoelectronic?

Answer the following question.

For the following pair, indicate which of the two species is of large size:

Fe²⁺ or Fe³⁺

Answer the following question.

For the following pair, indicate which of the two species is of large size:

Mg²⁺ or Ca²⁺

Answer the following question.

Select the smaller ion form the following pair:

K⁺, Li⁺

Answer the following question.

Select the smaller ion form the following pair:

N^3–, F^–

With the help of a diagram answer the questions are given below:

1. Which atom should have smaller ionization energy, oxygen, or sulphur?
2. The lithium forms +1 ions while beryllium forms +2 ions?

Define ionic radius

Define electronegativity

What are the valence electrons?

Define ionization enthalpy.

Name the factors on which ionization enthalpy depends?

How does ionization enthalpy vary down the group and across a period?

How the atomic size vary in a group and across a period? Explain with suitable example.

Give reason.

Alkali metals have low ionization enthalpies.

Give reason.

Inert gases have exceptionally high ionization enthalpies.

Find out the type of isomerism exhibited by the following pair.

CH₃ – CH₂ – NH – CH₂ - CH₃ and CH₃ - NH - CH₂ - CH₂ - CH₃