The entropy and enthalpy of a system are a measure of

• A. degree of disorderlinesss and heat content respectively
• B. heat content and degree of disorderliness respectively
• C. heat content of a system only
• D. degree of disorderliness only

Choose the option that best completes the gap(s).Is it true that Okoro ........ when the gates were closed?

• A. had returned
• B. could return
• C. should return
• D. would return

The inner diameter of a test tube can be measured accurately using a?

• A. micrometer screw gauge
• B. pair of dividers
• C. meter rule
• D. pair of vernier calipers

Which of the following advertising medium appeals to only the literate in the society

• A. radio advertising
• B. print media advertising
• C. television advertising
• D. cinema advertising

If \(\frac{3}{2x} - \frac{2}{3x} = 4\), solve for x

• A. \(\frac{4}{5}\)
• B. \(\frac{4}{13}\)
• C. \(\frac{5}{24}\)
• D. \(\frac{13}{24}\)

The process of acquisition of necessary skills by young people for national development is known as

• A. sponsorship
• B. encouragement
• C. motivation
• D. empowerment

Calculate the volume in cm3 of oxygen evolved as s.t.p. when a current of 5 A is passed through acidified water for 193s {F = 96500 Cmol-1, Molar volume of a gas at s.t.p. = 22.4 dm3

• A) 224.000 dm³
• B) 0.056 dm³
• C) 0.224 dm³
• D) 56.000 dm³

Which of these statements about y = 8\(\sqrt{m}\) is correct?

• A. log y = log 8 x log \(\sqrt{m}\)
• B. log y = 3 log 2 x \(\frac{1}{2}\) log m
• C. log y = 3 log 2 - \(\frac{1}{2}\) log m
• D. log y = 3 log 2 + \(\frac{1}{2}\) log m

(a) Explain what is meant by the statement: The capacitance of a parallel-plate capacitor is 2\(\mu\)F

(b) State: (i) three factors on which its capacitance depends

(ii) three uses of capacitors.

(c) Derive a formula for the energy W stored in a charged capacitor of capacitance C carrying a charge Q on either plate.,

(d) Two parallel-plate capacitors of capacitances 2\(\mu\)F and 3\(\mu\)F are connected in parallel and the combination is connected to a 50V d.c. source. Draw the circuit diagram of the arrangement and determine the:

(i) charge on either plate of each capacitor

(ii) potential difference across each capacitor

(iii) energy of the combinad capacitors.

A uniform metre rule of mass 90g is provided at the 40cm mark. If the rule is in equilibrium with an unknown mass m placed at the 10cm mark and a 72g mass at the 70cm mark, determine m

• A. 72g
• B. 102g
• C. 298g
• D. 504g