C6H3(l) → C6H 6 (g)
H2O (s) → H2O(l)
CuO(s) + H2(g) → Cu(s) + H2
Na2CO3(s) + nH2O(l) →Na 2CO3nH2O(s)
S(s) → S(l)
Correct answer is A
we have the greatest entropy when a substance changes from the liquid phase to the gaseous phase this is because the particles of gases are very loosely packed so they have the freedom to move around.
What is the amount (in mole) of sodium trioxocarbonate (IV) in 5.3 g of the compound? (Na2CO3 = 106)
0.05
0.10
0.20
0.50
2.00
Correct answer is A
No explanation has been provided for this answer.
carbon (IV) oxide
nitrogen
oxygen
water vapour
noble gases
Correct answer is C
No explanation has been provided for this answer.
physical states
melting points
Rf. values
solubility
boiling points
Correct answer is D
No explanation has been provided for this answer.
In which of the following is the oxidation number of nitrogen zero?
SO2 and NH3
NaNO3
HNO2
NOI3
N2
Correct answer is E
No explanation has been provided for this answer.