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Chemistry

Chemistry
Which of the following is used as non-stick coating for cooking utensils?

Perspex
Styrofoam
Teflon
Polystyrene

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Chemistry
Chemical formula of washing soda is

NaHCO3
Ca(OH)2
Na2CO3.10H2O
Na2SO4.10H2O

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Chemistry
Browning of paper in old books is caused by

Oxidation of cellulose
Lack of aeration
Collection of dust
Frequent use

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Chemistry
Spontaneous change is one in there is:

Increase in free energy
An increase in Internal energy
A lowering of free energy
A lowering of entropy

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Chemistry
Brass is a

Compound
Heterogeneous mixture
Homogeneous mixture
Element

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Chemistry
Mercury is emitted into air by

Burning coal
Coal fire
Steam engine
Burning garbage

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MORE MCQ ON Chemistry

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