Subject :NSO Class : Class 5
Refer to the given graph representing changes in the states of water with temperature.
Based on the given graph which of the following statements are correct?
(i) Heat is gained from P to T.
(ii) There are different states of water along QR.
(iii) Vaporisation occurs at P to Q.
A(i) and (ii) only
B(ii) only
C(ii) and (iii) only
D(i), (ii) and (iii)
answer keys appear to be wrong
Ans 1:
Class : Class 5
How can the state of water change at 0 degrees? it would remain as ice at zero degrees
Ans 2: (Master Answer)
Class : Class 1
A
Heat is gained from P to T. P to Q shows solid state of water i.e., ice. Ice changes to water along Q to R. Water gradually heats up along R to S and finally boils along S to T. Vaporisation does not occur along P to Q as it represents the solid state of water, i.e.,ice.
Ans 3:
Class : Class 5
How???The temperature just stays at 0 degrees along Q to R so how does the state change?