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CHEMISTRY

Chemistry
Which of the following molecules has a bond order of 2.5

NO
F2
HCL
CO

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Chemistry
An element of atomic no. 29 belongs to

P-block
S-block
D-block
F-block

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Chemistry
Which metal is the heaviest in periodic table among the following ?

Pb
W
Os
Pt

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Chemistry
Ruby and sapphire are oxides of

Aluminium
Copper
Tin
Iron

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Chemistry
The chemical name of quartz is

Sodium silicate
Sodium phosphate
Calcium oxide
Calcium phosphate

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