Periodic Classification of Elements and Periodicity - 4

Periodic Classification of Elements and Periodicity - 4

1. Due to the number of vacancies in the shell H₂S shows oxidation state of

a) +2
b) -6
c) -2
d) +6

2. The name Halogens is given to the elements of groups ________ due to salt forming property.

a) VIIB
b) VIIIA
c) IA
d) VIIA

3. SnO₂ + C Sn + CO₂
In the above reaction carbon acts as a
a) Dehydrating
b) Oxidizing agent
c) None of the above
d) Reducing agent

4. In a group atomic radius _____________ from top to bottom.

a) Decreases
b) Increases
c) Remains same
d) No change

5. In the period iso electronic positive ion shows a decrease in ionic radius from ___________.

a) Left to right
b) top to bottom
c) Down the group
d) Right to left

6. The elements which exist as gaint covalent structures have very _________ melting points.

a) No change
b) Low
c) High
d) Same

7. New land

a) 1929
b) Triads
c) 1871
d) Octave

8. Mosley

a) Triads
b) Atomic Numbers
c) Octave
d) Amphoteric oxides

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