T
U
X
Y
Correct answer is A
point T shows solid-liquid equilibrium. At this point, the substance been heated has begun to melt but has not completely melted forming a solid liquid mixture.
7.45 g
14.90 g
74.50 g
149.00 g
Correct answer is D
Trace the graph to the y-axis to obtain the solubility of the salt at 80°C and at the point where the straight line touches the y-axis, the solubility of the salt at these respective temperatures is 4mol\dm3 and 6mol\dm3 solubility of salt that will crystallize out = 6- 4 = 2mol\dm3 therefore mass of salt deposited = solubility x molar mass of salt 2 x 74.5 = 149.00g
300, 500
500, 300
-300, -500
-500, -300
Correct answer is C
The uncatalysed reverse reaction = 100 - 400 = -300 The calalysed reverse reaction = 100 - 600 = - 500
Which of the curves in the above graph illustrates the behaviour of an ideal gas?
W
X
Y
Z
Correct answer is C
No explanation has been provided for this answer.
In the above set up substances X and Y are respectively
lime water copper (ll) tetraoxosulphate (lV)
potassium trioxocarbonate and alkaline pyrogallol
potassium hydroxide and alkaline pyrogallol
potassium trioxocarbonate (lV) and concentrated tetraoxosulphate (IV) acid
Correct answer is C
No explanation has been provided for this answer.
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