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Chemistry

Chemistry
The noble gas used in radiotherapy is

Radon
Xenon
Neon
Argon

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Chemistry
Which of the following substance is highly plastic ?

Mica
Clay
Granite
Quartz

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Chemistry
Which one of the following is not a fertilizer?

Calcium ammonium nitrate
Potassium nitrate
Calcium sulphate
Ammonium sulphate

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Chemistry
Milk tastes sour when it is left in open for some time. This happens due to the formation of

Carbonic acid
Acetic acid
Lactic acid
Citric acid

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Chemistry
In arc welding, Argon is used because of its

High flammability
Ability to lower the melting point of the metal
Low reactivity with metal
High calorific value

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Chemistry
Helium gas is filled in ballons because

It is one of the constitutents of water
Its atomic number is 2
It is lighter than air
It is a noble gas

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