Dissolving some pellets of NaOH in water would result in
a decrease in the free energy of the solution
a decrease in the entropy of the solution
a lowering of the temperature of te solution
an increase in the entropy of the solution
Correct answer is D
No explanation has been provided for this answer.
The salt formed from strong acid and a strong base is?
complex
neutral
basic
acidic
Correct answer is B
Sodium chloride, which is obtained by neutralization of hydrochloric acid and sodium hydroxide, is a neutral salt.
Neutralization of any strong acid with a strong base always gives a neutral salt.
Tartaric acid is used industrially to
make baking powder
make fruit juices
remove rust
dry substance
Correct answer is A
No explanation has been provided for this answer.
6 mins
8 mins
24 mins
48 mins
Correct answer is B
Cu2+ + 2e → Cu(s)
2 * 96500C deposit 64g of Cu
∴ x quantity of electricity wil deposit 0.08
x = (2 * 96500 * 0.08)/64 =241.25 coulomb.
Q = It
241.25 = 0.5t
t = 241.25/60 = 8 mins
C2H4(g) + H2(g) → C2H6(g) ΔH = -137kJ mol-1
The reaction represented above is
exothermic
spontaneous
endothermic
in equilibrium
Correct answer is A
No explanation has been provided for this answer.