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Chemistry

Chemistry
Concentration of a material which is lethal to 50% animal is called

LC50
NOAEL
LD50
ADI

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Chemistry
Isobars are lines joining places having equal

Rainfall
Pressure
Height above sea-level
Population

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Chemistry
The major component in the LPG is

Methane
Propane
Butane
Ethane

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Chemistry
The most extensive, commercially useful source of thorium as monazite sand occurs in India at

Gujarat coast
West Bengal coast
Orissa coast
Travancore coast

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Chemistry
Brass is a

Homogeneous mixture
Heterogeneous mixture
Compound
Element

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Chemistry
Atomic number is the number equal to

Protons
Neutrons
Electrons
None of these

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