Which one of the following is not the mono isotopic element ?
Which one of the following is not the mono isotopic element ?
A. arsenic
B. uranium
C. iodine
D. nickel
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Separation of a solid from its hot saturated solution by cooling is called__________________?
Separation of a solid from its hot saturated solution by cooling is called__________________?A. vapourization
B. solvent extraction
C. filtration
D. crystallizationCarbohydrates are polyhydroxy compounds of___________________?
Carbohydrates are polyhydroxy compounds of___________________?A. Glucose
B. Glyceraldehydes
C. Oligosaccharides
D. Aldehydes and ketonesWhich of the following reaction is not shown by ketones ?
Which of the following reaction is not shown by ketones ?A. reaction with HCN
B. reaction with NaHSO3
C. reaction with 2 4 dinitrophenyl hydrazine
D. reaction with Fehling solutionWhen aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ?
When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ?A. phenol is unsaturated
B. 2-bromophenol is insoluble in water
C. a hydroxy group makes the benzene ring more susceptible to electrophilic attack
D. acid-base reactionThe irritation caused by red ants bite is due to____________________?
The irritation caused by red ants bite is due to____________________?A. Lactic acid
B. Formic acid
C. Uric acid
D. Acetic acid1 molar solution of glucose in water contains weight of glucose________________?
1 molar solution of glucose in water contains weight of glucose________________?A. 180g/dm3
B. 170g/dm3
C. 190g/dm3
D. 195g/dm3