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ICSE chemistry

Question 1
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Give reason as to why:

The oxidising power of element increases on moving from left to right along a period in the period in the periodic table.

Solution

The oxidising power of elements increases on moving left to right along a period in the periodic table because electronegativity and the non-metallic character increases from left to right.

Question 2
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Fill in the blanks from the choices given below:

Across a period, the ionisation potential …………….(increases, decreases, remains same)

Solution

increases

Question 3
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Fill in the blanks from the choices given below:
Down the group, electron affinity…………….(increases, decreases, remains same).

Solution

Decreases

Question 4
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Choose the correct answer from the options given below:
In the periodic table alkali, metals are placed in the group..........

  • 1

  • 11

  • 17

  • 18

Solution

A.

1

Question 5
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Choose the correct answer from the options given below:
Which of the following properties do not match with elements of the halogen family?

  • They have seven electrons in their valence shell.

  • They  are highly reactive chemically.

  • They are metallic in nature.

  • They are diatomic in their molecular form.

Solution

C.

They are metallic in nature.