According to the kinetic theory of gases the collision of the molecules of a gas with the wall of the container is mainly responsible for the l. temperature of the gas ll. viscosity of the gas Ill. pressure of the gas Which of the statements above is/are correct?

• A. I only
• B. II only
• C. III only
• D. II and III only

Which of the following media allow the transmission of sound waves through them?

I. air

II. liquid

III. solids

• A. I & II only
• B. I & III only
• C. II & III only
• D. I, II & III

Heat transfer by convection in a liquid is due to the

• A. translatory motion of the molecules of the liquid
• B. increased vibration of the molecules of the liquid about their mean positions
• C. expansion of the liquid as it is heated
• D. latent heat of vaporization of the liquid

Which of the following is required to convert a milliammeter to an ammeter?

• A. A high resistance in parallel
• B. A high resistance in series
• C. A low resistance in parallel
• D. A low resistance in series

(a) Define the boiling it of a liquid.

(b) Describe with the a d. labelled diagram, an experiment to determire the boiling point of a small quantity of a liquid.

(c) factors that may affect the boiling point of a liquid

(d) Using the kinetic theory of matter, explain why pure water changes to steam at S.T.P. without any change in temperature, although heat is being supplied to the water.

(a) Define

(i) proton number;

(ii) nucleon number;

(iii) isotopes.

(b) A nuclide \(^A_ZX\) emits \(\beta\)-particle to form a daughter nuclide Y. Write a nuclear equation to illustrate the charge conservation.

(c) The radioactive nuclei \(^{210}_{84}P_o\) emits an \(\alpha\) - particle to produce \(^{206}_{82}P_b\). Calculate the energy, in MeV, released in each disintegration.

Take the masses of \(^{210}_{84}P_o\) = 209.936730 u;

\(^{206}_{82}P_b\) = 205.929421 u;

\(^{4}_{2}He\) = 4.001504 u;

and that 1u = 931 MeV

A potential difference of 12V is applied across the ends of a 6Ω resistor for 10 minutes. Determine the quantity of heat generated

• A. 720J
• B. 1200J
• C. 14400J
• D. 43200J

The refractive index of a liquid is 1.5. If the velocity of light in vacuum is 3.0 x 10⁸m/s, the velocity of light in the liquid is

• A. 1.5 x 108m/s
• B. 2.0 x 108m/s
• C. 3.0 x 108m/s
• D. 4.5 x 108m/s

An a.c circuit of e.m.f 12V has a resistor of resistance 8Ω connected in series to an inductor of inductive reactance 16Ω and a capacitor capacitive reactance 10Ω. The current flow in the circuit is

• A. 1.4A
• B. 1.2A
• C. 12.0A
• D. 14.0A

The types of motion which a cylindrical drum rolling down an inclined plane undergoes are

• A. circular and translational
• B. rotational and translational
• C. rotational and circular
• D. rectilinear and circular