i, iv and v
iv and v
i and iv
ii and v
ii, iii and iv
Correct answer is C
No explanation has been provided for this answer.
60
72
82
89
92
Correct answer is E
No explanation has been provided for this answer.
25.0 moles
12.5 moles
6.25 moles
3.125 moles
0.625 moles
Correct answer is C
Fe2O3 = 56 x 2 + 48 = 160 = 1 moles
1000gm will contain \(\frac{1000}{160}\) = 6.25 moles
Hydrogen diffuses through a porous plug
at the same rate as oxygen
at a slower rate than oxygen
twice as fast as oxygen
three times as fast as oxygen
four times as fast as oxygen
Correct answer is E
No explanation has been provided for this answer.
solid can be ground to a fine powder
density of the solid is 2.25gdm-3
solid begins to melt at 573k but is not completely melted until 648k
solid absorbs moisture from the atmosphere and turns into liquid
solid melts at 300k
Correct answer is C
No explanation has been provided for this answer.