What is the quantity of electricity produced when a current of 0.5A is passed for 5 hours 45mins? (F = 96500C)

• A) 0.11F
• B) 0.12F
• C) 0.22F
• D) 1.1F

Solve x² − 2x − 3 = 0

• A. x = 2 or 1
• B. x = 3 or -1
• C. x = 1 or 0
• D. x = 1 or 2

According to Luke , the third temptation by the devil was that Jesus should

• A. jump down from the high mountain
• B. throw himself down from the pinnacle of the temple
• C. rebuild the temple in three days
• D. command stones to become bread

Interpretations are given. choose the interpretation that is most appropriate

The company has been under siege from the public. This means that the company is being

• A. applauded
• B. picketed
• C. criticized
• D. shielded

(a)(i) State the principal factor that determines the relative stability of a radioactive nucleus.

(ii) Arrange the following radioactive nucleus in decreasing order of stability. Justify your answer: X,W and Y:

\(^40{X}_20\) \(^920{Y}_36\) and \(^95{Z}_42\)

(b)(i) Explain the term ionization potential.

(ii)

The diagram below illustrates energy levels in the hydrogen atom. E, is the energy of the E\(_0\) ground state.

(i) When an electron makes a transition from level n = 3 to level n = 1, it emits a photon of wavelength 1.02x 10\(^{-7}\)m. Calculate E\(_0\).

(ii) Calculate the ionization potential of the hydrogen atom.

(c)(i) Explain the statement, the work function of sodium is 2.0 eV. (ii) Light of wavelength 160 mm is shone on the surface of a sodium metal of work function 2.0 eV. Determine whether photoelectrons will be emitted. [h = 6.6 x 10\(^{-34}\) Js, e = 3.0 x 10\(^{8}\)m/s, I eV = 1.6 x 10\(^{-19}\) J]

A steel needle floating on water, sinks when kerosine is added to the water. This is because the kerosine

• A. increased the surface tension of the water
• B. reduces the density of the water
• C. reduces the surface tension of the water
• D. reduces the upthrust on the needle

Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss; Specific heat capacity of copper = 400JKg^-1K^-1 Latent heat of fusion of ice = 3.3 x 10⁵JKg^-1

• A. 8/33kg
• B. 33/80kg
• C. 80/33kg
• D. 33/8kg

When a nucleus is formed by bringing protons and neutrons together, the actual mass of the formed nucleus is less than the sum of the masses of the energy equivalent of this mass difference is the

• A. lost energy
• B. work function
• C. binding energy
• D. stability energy

The importance of knowledge of isnad and matn lies in the fact that

• A. both were taught by the Prophet (S.A.W)
• B. the two make it easy to memorize Hadith
• C. the two make it easy to identify fault in Hadith
• D. they make it possible to understand Hadith

A uniform cylindrical hydrometer of mass 20g and cross sectional area 0.54cm² floats upright in a liquid. If 25cm of its length is submerged, calculate the relative density of the liquid. (Density of water = 1 gcm^-3)

• A. 1.54
• B. 1.48
• C. 1.25
• D. 0.80