Which of the following group of crops can be attacked by smut diseases?

• A. suggarcane, maize and banana
• B. rice, maize and guinea corn
• C. guinea corn, sugarcanr and rubber
• D. maize, guinea corn and yam

(a)(i) What is meant by hydrocarbons?

(ii) A hydrocarbon consists of 92.3% carbon. If it's vapour density is 39, determine its molecular formula. (H = 1; C = 12)

(b)(i) Outline a suitable laboratory procedure for obtaining ethanol from cassava tubers

(ii) List two laboratory reagents used for oxidizing ethanol to ethanoic acid.

(c) What name is given to each of the following processes?:

(i) Conversion of alkanols to alkanoates;

(ii) Breakdown of proteins to amino acids;

(iii) Conversion of oils to fats

(iv) Alkaline hydrolysis of fats and oils.

The ages of three men are in the ratio 3:4:5. If the difference between the ages of the oldest and youngest is 18 years, find the sum of the ages of the three men

• A. 45 years
• B. 72 years
• C. 108 years
• D. 216 years

Energy losses through eddy currents are reduced by using

• A. low resistance wires
• B. insulated soft iron wires
• C. few turns of wires
• D. high resistance wires

Spruce, pine and fir are trees associated with?

• A. Savanna grassland
• B. Coniferous forest
• C. Mediterranean woodland
• D. Tropical evergreen forest

The pressure of a fixed mass of an ideal gas at 27°C is 3 pa. The gas is heated at a constant volume until its pressure is 5 pa. Determine the new temperature of the gas.

• A. 100^oC
• B. 227^oC
• C. 273^oC
• D. 500^oC

The effective potential energy,E, of a lunar satellite of mass,m, moving in an. elliptical orbit around the moon of mass,m, is given by

E = \(\frac{K^{2}}{2m_{1}r^{2}} - \frac{Gm_{1}m_{2}}{r}\) whereris the distance of the satellite from the moo? andGis the universal gravitational constant of dimensions, M\(^{-1}\)L\(^{3}\)T\(^{2}\).

?etermine the dimensions of the angular momentum,K, of the satellite using dimensional analysis.

Which of the following is a source of a country's constitution?

• A. Mandamus
• B. Judicial precedents
• C. injunctions
• D. political decisions

Which of the following processes leads to increase in entropy?

• A) mixing of a sample of NaCl and sand
• B) condensation of water vapour
• C) boiling of a sample of water
• D) cooling a saturated solution

A trained person that specializes in the treatment of diseases and disorders of the teeth is called................

• A. Cardiologist
• B. Dermatologist
• C. Physician
• D. Dentist