Class XI Chemistry Classification of Elements 4

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Question 1

Which of the following relation is correct?

• A2 I.E. – E.A – E.N. = 0
• B2 I.E. – E.N. + E.A. = 0
• C2 E.N. – I.E. – E.A. = 0
• DE.N. – I.E. – 2 E.A. = 0

Question 2

When we move from left to right in a period electropositive character -

• AIncreases
• BDecreases
• CNo change
• DFirst increases then decreases

Question 3

Which of the following order is correct for acidic property?

• ASiH₄ > PH₃ > H₂S
• BSiH₄ = PH₃ = H₂S
• CSiH₄ < PH₃ > H₂S
• DSiH₄ < PH₃ < H₂S

Question 4

Which of the following acid is strongest -

• AHF
• BH₂O
• CNH₃
• DCH₄

Question 5

Which of the following is weakest basic oxides-

• AFe₂O₃
• BFeO
• CBaO
• DNa₂O

Question 6

If the principal quantum number n=6, the correct sequence of filling of electrons will be:

• A
• B
• C
• D

Question 7

In the long form of the periodic table, the valence shell electronic configuration of corresponds to the element present in:

• AGroup 16 and period 6
• BGroup 17 and period 5
• CGroup 16 and period 5
• DGroup 17 and period 6

Question 8

Select correct statement:

• Awhen a covalent bond is formed, transfer of electrons takes place
• Bpure H₂O does not contain any ion
• Ca bond is formed when attractive forces overcome repulsive forces
• DHF is less polar than HBr

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