In how many forms do matter exists ?
In how many forms do matter exists ?
A. Three
B. Four
C. Five
D. Two
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Downs cell is used to prepare_________________?
Downs cell is used to prepare_________________?A. Sodium carbonate
B. Sodium bicarbonate
C. Sodium metal
D. Sodium hydroxideMolecular ions are formed by passing______________________?
Molecular ions are formed by passing______________________?A. High energy electron beam
B. ? – particle
C. X-rays
D. All of the aboveAnimal charcoal adsorbs the coloured_________________?
Animal charcoal adsorbs the coloured_________________?A. impurities
B. crystals
C. solvents
D. both A & BWhat is clinker ?
What is clinker ?A. roasted calcareous material
B. roasted argillaceous material
C. roasted calcareous and argillaceous material
D. roasted gypsumThe process in which solid changes directly into vapours without passing through liquid state?
The process in which solid changes directly into vapours without passing through liquid state?A. Decantation
B. Sublimation
C. Evaporation
D. NoneNcleophilic addition reactions are catalysed__________________?
Ncleophilic addition reactions are catalysed__________________?A. Acid
B. Base
C. Both A and B
D. None