Question : Which one of the following forms of phosphorus is most reactive?
Option 1: Black phosphorus
Option 2: White phosphorus
Option 3: Violet phosphorus
Option 4: Red phosphorus
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Correct Answer: White phosphorus
Solution : The correct option is White phosphorus.
Due to its strong reactivity and ability to spontaneously ignite in air at room temperature, white phosphorus is also known as "yellow phosphorus". Because it can catch fire when in contact with air, it is kept underwater or in an inert environment during storage. White phosphorus is employed in chemical reactions, matches and incendiary equipment.
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Question : Which one of the following substances is normally found in urine?
Option 1: Blood proteins
Option 2: Creatinine
Option 3: Red blood cells
Option 4: White blood cells
Question : In the absence of the earth's atmosphere, sky would appear:
Option 1: blue
Option 2: deep red
Option 3: white
Option 4: black
Question : Strait of Gibraltar connects which of the following ?
Option 1: Red Sea-Mediterranean Sea
Option 2: Red Sea- Arabian Sea
Option 3: Atlantic Ocean- Mediterranean Sea
Option 4: Mediterranean Sea-Black Sea
Question : Which one of the following non-metals shows allotropy in the liquid state?
Option 1: Carbon
Option 2: Sulphur
Option 3: Phosphorus
Option 4: Bromine
Question : Which of the following blood cells is compulsory for blood coagulation ?
Option 1: Platelets
Option 2: Red Blood Corpuscles
Option 3: White Blood Corpuscles
Option 4: Lymphocites
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