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Chemistry

Chemistry
The major constituent of air is

oxygen
hydrogen
carbon dioxide
nitrogen

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Chemistry
Aerated water contains

CO2
H2
NO2
SO2

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Chemistry
The enzyme that converts glucose to ethyl alcohol is :

Zymase
Invertase
Diastase
Maltase

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Chemistry
Which of the following has least negative electron gain enthalpy

F
P
S
Cl

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Chemistry
The 'solid waste' is also known as

Toxic waste
Sludge
Sedge
Scrubber

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Chemistry
Aquaregia is a mixture of the following in the ratio 1 : 3 by volume

Dil. HCl and dil. HNO3
Conc. HNO3 and conc. HCl
Conc. HNO3 and conc. H2SO4
Conc. HCl and conc. HNO3

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