Everyday Science MCQs

5120 MCQs  (Page 326 of 512)

Attempt Everyday Science MCQs Quiz
Safe and the most reliable method of drying crystals is through_________________?
A. Filter paper
B. Vacuum desiccators
C. Oven
D. None of these
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Silica gel and alumina are used as __________________?
A. Mobile phase
B. Stationary phase
C. Mixed phase
D. Single phase
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Direct conversion of solids into vapours is called ___________________?
A. Solvent extraction
B. Sublimation
C. Crystallization
D. Vaporization
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Without suction pump filtration is __________________?
A. Fast process
B. Slow process
C. Rapid process
D. All are possible
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The use of CaCl2 and PCl5 in the process of crystallization is as a____________________?
A. Oxidizing agent
B. Reducing agent
C. Drying agent
D. Colouring agent
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In solvent extraction ether is used to separate products of organic synthesis from________________?
A. Water
B. Iodine
C. Hydrochloric acid
D. Gases
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In crystallization if the solvent is inflammable then direct heating is________________?
A. Needed
B. Avoided
C. Depends on temperature
D. Crystallization does not involve heating
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Rate of filtration can be increased by applying gentle suction______________?
A. Gooch crucible
B. Filter paper
C. Sintered crucible
D. All of the above
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Size of filter paper is selected according to the amount of__________________?
A. Solution
B. Amount of insoluble solute
C. Amount of soluble solute
D. Amount of solvent
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Sintered crucible is made up of________________?
A. Plastic
B. Glass
C. Porcetain
D. Fiber
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Word of the Day
26 Jul
Simultaneously
at the same time.
ایک ہی وقت میں، ایک ساتھ، بیک وقت

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