sodium hydroxide solution
chlorine water
pure water
sodium hypochlorite solution
hydrochloric acid solution
Correct answer is A
we take cold aqueous to be concentrated solution of NaCl.
NaCl → \(Na^+ + Cl^-\)
\(H_2O → H^+ + OH^-\)
H ion will be preferably discharged at the cathode while Cl ion will be discharged at the anode(due to high concentration)
Thus, NaOH is left in the solution.
Hardening of an oil may be achieved by?
boiling the oil with water
boiling the oil with a catalyst
treating the oil with sodium hydroxide
treating the oil with hydrogen and catalyst
distilling oil under reduced pressure
Correct answer is D
No explanation has been provided for this answer.
Electrons flow towards the zinc rod
The zinc rod dissolves
The temperature of the soil changes
The blue colour of the solution gradually disappears
Copper metal is deposited
Correct answer is A
No explanation has been provided for this answer.
The chemical reaction which takes place at the anode (positive electrode) in electrolysis is?
oxidation
hydrolysis
dissociation
reduction
disproportionation
Correct answer is A
No explanation has been provided for this answer.
Which of the following silver halides is readily soluble in ammonium hydroxide?
Agl
AgBr
AgCl
AgF
None of the above
Correct answer is C
No explanation has been provided for this answer.