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Chemistry

Chemistry
The value of Avogadro Number is

6.023 × 1024
6.023 × 1023
6.023 × 1025
6.023 × 1022

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Chemistry
Which one among the following is not a mixture?

Brass
Graphite
Steel
Glass

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

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

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Chemistry
The chemical substance present in bones and teeth is

Calcium sulphate
Calcium chloride
Calcium phosphate
Calcium borate

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Chemistry
The enzyme that converts glucose to ethyl alcohol is :

Zymase
Invertase
Diastase
Maltase

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Chemistry
Catalyst is a substance which

Decreases the rate of reaction
Has no action on the rate of the reaction
Increases the rate of the reaction
None of these

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