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Chemistry

Chemistry
The enzyme that converts glucose to ethyl alcohol is :

Invertase
Maltase
Zymase
Diastase

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Chemistry
When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is

Carbon dioxide
Hydrogen
Oxygen
All of them

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Chemistry
Which of the following metals form an amalgam with other metals ?

Zinc
Lead
Mercury
Tin

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Chemistry
The fundamental particles present in the nucleus of an atom are

Neutron, positron
Electron, proton
Proton, neutron
Neutron, electron

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Chemistry
Periodic table contains how many groups

17
18
19
16

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Chemistry
Which of the following laser types is used in a laser printer?

Semiconductor laser
Gas laser
Dye laser
Excimer laser

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