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Chemistry

Chemistry
How many electrons can be accommodated in d-orbital

6
3
8
10

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Chemistry
The National Chemical Laboratory (India) is located in

Bangaluru
Pune
Hyderabad
Mumbai

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Chemistry
Dry powder fire extinguishers contain

Sand and sodium carbonate
Sand and sodium bicarbonate
Sand and potassium carbonate
Sand

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Chemistry
Which of the following is a natural dye ?

Aniline blue
Phenolphthalein
Alizarin
Crystal violet

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Chemistry
Cement is usually a mixture of :

Lime stone and silicon dioxide
Calcium silicate and calcium ferrate
Calcium aluminate and calcium ferrate
Calcium silicate and calcium aluminate

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Chemistry
Diamond is lustrous because

It is pure
Its refractive index is high
It is hard
It is colourless

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