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Chemistry

Chemistry
The process which does not evolve CO2 in air is

Breathing
Burning
Photosynthesis
Organic delay

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Chemistry
Nylon is a type of

Polyamide
Acrylic
Polyolefin
Polyester

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Chemistry
The items amenable to detection by soft x-rays are

narcotics
genuine coins from counterfeit coins
lead in bullets
contrabands

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Chemistry
PH scale ranges from

0 – 7
0 – 14
8 – 14
None

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Chemistry
The most electropositive elements among the following is

Cs
K
Na
Ca

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Chemistry
When a bond is formed between two atoms, the energy of the system will

Remain the same
May increase or decrease
Increase
Decrease

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