Acetaldehyele cyanohydrin on acid hydrolysis yields___________________?
(A) Tartaric acid
(B) Propanoic acid
(C) Lactic acid
(D) Valeric acid
Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter?
(A) PdCl2
(B) Cu2Cl2
(C) CuCl2
(D) PbCl2
First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
(A) They are more reactive
(B) They have greater atomic radii
(C) They have smaller atomic sizes
(D) All
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
(A) Smaller electronegativity of alkali metals
(B) Smaller ionic radius of these metals
(C) De-excitation of electrons from higher energy levels to low energy level
(D) Excitation of electrons from low energy levels to higher energy levels
In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents_______________?
(A) Hydroxide ions to reach anode
(B) Chlorine gas to mix
(C) Cathode to decay
(D) All of the above
The deliquescence is a property in which a solid____________________?
(A) Absorbs moisture and remains solid
(B) Absorbs moisture and turns to liquid form
(C) Loses water of crystallization
(D) Increases the number of water of crystallization
Which one of the following gives white precipitate with aqueous solution of BaCl2?
(A) NaHCO3
(B) NaNO3
(C) Na2CO3
(D) Na2CrO4
Crystals of Na2CO3. 10H2O when exposed to air_________________?
(A) Lose water and remain solid
(B) Gain water and remain solid
(C) Gain water and become liquid
(D) Remains unchanged
Ammonia may be prepared by heating ammonium chloride with_______________?
(A) Water
(B) NaCl
(C) Aqueous sodium hydroxide
(D) H2SO4
Downs cell is used to prepare_________________?
(A) Sodium carbonate
(B) Sodium bicarbonate
(C) Sodium metal
(D) Sodium hydroxide