Question 771:

• JAMB 1994

If a solid X floats in liquids P of relative density 2.0 and in liquid Q of relative density 1.5, it can be inferred that the

A. Weight of P displaced is greater than that of Q
B. Weight of P displaced is less than that of Q
C. Volume of P displaced is greater than that of Q
D. Volume of P displaced is less than that of Q

Question 772:

• JAMB 1994

The melting point of naphthalene is 78^oC. What is this temperature in kelvin

A. 100k
B. 351k
C. 378k
D. 444k

Question 773:

• JAMB 1994

A Motor Tyre is inflated to pressure of 2.0 x 10⁵Nm^-2 when the temperature of air is 27^oC. What will be the pressure in it at 87^oC assuming that the volume of the Tyre does not change?

A. 2.6 x 10⁵Nm^-2
B. 2.4 x 10⁵Nm^-2
C. 2.2 x 10⁵Nm^-2
D. 1.3 x 10⁵Nm^-2

Question 774:

• JAMB 1994

When 100g of liquids L1 at 78°C was mixed with Xg of liquid L2 at 50°C, the final temperature was 66°C. Given that the specific heat capacity of L2is half that of L1, find x

A. 50g
B. 100g
C. 150g
D. 200g

Question 775:

• JAMB 1994

Heat is supplied to a test tube containing 100g of ice at its melting point. The ice melts completely in 1 min.What is the power rating of the source of heat? [Latent heat of fusion of ice = 336Jg^-1]

A. 336W
B. 450W
C. 560W
D. 600W