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Chemistry

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

0.25 mole
0.5 mole
0.4 mole
0.2 mole

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Chemistry
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

x/6
5x/36
5x
7.2 x

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Chemistry
Which of the following could be used as fuel in propellant or rockets ?

Liquid Oxygen + Liquid Argon
Liquid Nitrogen + Liquid Oxygen
Liquid Hydrogen + Liquid Oxygen
Liquid Hydrogen + Liquid Nitrogen

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Chemistry
Which one of the following has a maximum tendency to form M3 ion ?

As
N
Bi
P

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Chemistry
Depletion of ozone layer causes

Skin cancer
Lung cancer
Blood cancer
Breast cancer

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Chemistry
The pH of human blood is between :

7.5-8
4.5-5
6.5-7
44052

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MORE MCQ ON Chemistry

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