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Chemistry

Chemistry
In a period from Li to F, ionisation potential

Cannot be predicted
Increases
Remains same
Decreases

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Chemistry
The orientation of an atomic orbital is governed by

Principal quantum number
Azimuthal quantum number
Spin quantum number
Magnetic quantum number

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Chemistry
What is the most commonly used substance in fluorescent tubes?

Mercury vapour and argon
Mercury oxide and neon
Sodium vapour and neon
Sodium oxide and argon

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Chemistry
Which of the following is not a precious/semi-precious stone?

Pearl
Sapphire
Emerald
Ruby

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Chemistry
What is the most common salt in sea water ?

Calcium carbonate
Potassium chloride
Sodium chloride
Magnesium sulphate

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Chemistry
Iron filings can be separated from a heterogenous mixture using the technique of :

Sublimation
Evaporation
Sedimentation
Magnetization

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