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Chemistry

Chemistry
What are the number of moles of CO2 which contains 16 g of oxygen?

0.2 mole
0.4 mole
0.5 mole
0.25 mole

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Chemistry
Which one is the naturally occuring heaviest element

Uranium
Protactinium
Mercury
Thorium

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Chemistry
Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has

Stable half filled 2p sub level
High nuclear charge
High bond dissociation energy
Smaller atomic radius

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Chemistry
Nylon threads are made of

Polysaccharide
Polyester polymer
Polyamide polymer
Polyvinyl polymer

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Chemistry
The wire of flash bulbs is made up of

Ba
Mg
Ag
Cu

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Chemistry
What is the chemical symbol of mercury

Mg
Hg
Mr
None of these

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