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Chemistry

Chemistry
When formaldehyde and potassium hydroxide are heated, we get

Ethyl formate
Acetylene
Methane
Methyl alcohol

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Chemistry
Many people died in London in 1952 as result of air pollution producing

Fog
Sleet
Mist
Smog

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Chemistry
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is

3.05 gram
2.05 gram
5.05 gram
4.05 gram

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Chemistry
The ionic radii of N3-, O2-, F- and Na+ follows the order

Na+ > O2- > N3- > F-
N3- > Na+ > O2- > F-
N3- > O2- > F- > Na+
O2- > F- > Na+ > N3-

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Chemistry
Which of the following is a method/process of disposing of solid waste which cannot be reused or recycled ?

Incineration
Landfills
Pyrolysis and Gasification
All listed here

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Chemistry
Which of the following is the correct sequence of countries in terms of maximum carbon dioxide emission?

USA, India, China, European Union
China, USA, European Union, India
China, India, European Union, USA
European Union, China, USA, India

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