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Chemistry

Chemistry
The most electronegative element among the following is

fluorine
oxygen
bromine
sodium

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Chemistry
Liquid Nitrogen boils at

82 Kelvin
54 kelvin
77 kelvin
97 Kelvin

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Chemistry
Entropy of Universe is always

Constant
Decreasing
Zero
Increasing

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Chemistry
By which organic compound all the oils are known ?

Carbohydrate
Hydrocarbon
Ester
Protein

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Chemistry
Which of the following vitamins is generally excreted by human in urine?

Vitamin D
Vitamin C
Vitamin B
None of these

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Chemistry
Which is a natural colloid ?

Cane-sugar
Urea
Blood
Sodium chloride

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