Question 1a deficiency of vitamin B1 (thiamine) in the diet of a child can lead toA.goitreB.beri-beriC.scurvyD.pellagraObjective Show full explanation
Question 2which of the following is not a component of guard cells?A.chloroplastB.nucleusC.the inner wallD.rough spikeObjective Show full explanation
Question 3the enzyme of the glycolytic pathway is located in the ......... A.mitochondriaB.golgi apparatusC.cytoplasmD.rough spikeObjective Show full explanation
Question 4light 1 required in photosynthesis .........A.oxidize water moleculesB.split water moleculesC.reduce carbon (iv) oxideD.fix carbon (iv) oxideObjective Show full explanation
Question 5the diploid number of chromosomes in man is .........A.46B.23C.48D.26Objective Show full explanation
Question 6the following are parts of the continental shelf of the marine habitat except ..........A.splash zoneB.sub tidal zoneC.inertidal zoneD.benthic zoneObjective Show full explanation
Question 7the part of the brain resonsible for the coordination of involuntary actions such as heart beat, peristalsis is ........A.medulla oblongataB.cerebellumC.pinealD.cerebrumObjective Show full explanation
Question 8when a velocity-time graph is a curve it means that we have ..........A.a uniform accelerationB.a non-uniform accelerationC.a uniform velocityD.a non-uniform velocityObjective Show full explanation
Question 9a ball of mass 1kg falls from a height of m and rebounds to a height of 2m after striking a horizontal surface. calculate the loss in energy due to impact (take=10ms-2)A.100jB.50jC.10jD.1jObjective Show full explanation
Question 10a projectile attains a maximum rage of 40m when g=10ms-2. calculate the velocity of projectionA.400ms-1B.80ms-1C.20ms-1D.10ms-1Objective Show full explanation
Question 11a ball of mass 10kg strikes a wall normally with a velocity 5ms-1 and travels back with velocity.calculate its impulse on the wallA.0B.25ms-1C.50ms-1D.100ms-1Objective Show full explanation
Question 12calculate the velocity of the wave represented by the following wave represented by the following wave equation y = 20sin(60πt-0.6πx) if all the distance are in metersA.30ms-1B.60ms-1C.80ms-1D.100ms-1Objective Show full explanation
Question 13the following are stringed instruments except ...........A.violinB.pianoC.guitarD.xylophoneObjective Show full explanation
Question 14if two 2µF capacitors are connected in paralleled with each other and the other combination is then connected in series with 4µF capacitor the net capacitance will be .......A.6.0µFB.4.0µFC.2.0µFD.0.2µFObjective Show full explanation
Question 15the limiting fraction force on a body of mass 4kg resting on an inclined plane is 2oN. what is the angle of inclination on the planet? A.75°B.65°C.45°D.30°Objective Show full explanation
Question 16which of the following quantities has the same unit as the product of pressure and volume of a gas?A.powerB.accelerationC.workD.forceObjective Show full explanation
Question 17Given a body underground circular motion with angular velocity, ω rad/s, and radius rm. Suppose the body has mass, mkg. then it will experience a centripetal force F of the formA.mωr2B.mω2rC.mω2r2D.mωr2Objective Show full explanation
Question 18What is the efficiency of a cell with internal resistance of 3&Omege;, when is supplies current of 7Ω resistor?A.70%B.30%C.20%D.10%Objective Show full explanation
Question 19which of the following compounds is not obtained by polymerization?A.plasticB.polytheneC.petroleumD.celluloseObjective Show full explanation
Question 20A specimen of zinc contained zinc oxide 0.80g of this specimen reacted type equation here with acid to give 215cm3 of hydrogen collected dry at 17c and 770mmHg. Calculate the percentage of zinc oxide in the mixture. {32.5g = zn, 1g =H}A.15%B.25%C.35%D.45%Objective Show full explanation
Question 21A measure of the degree of disorderliness in a chemical system is known asA.enthalpyB.entropyC.free energyD.activation energyObjective Show full explanation
Question 22Cr2O72 + 6Fe2+ → 2Cr3+ + 6FE+ + 7H2OA.+7 to +3B.+6 to +3C.-6 to +3D.-2 to +6Objective Show full explanation
Question 23which of the following metals will dissolve in aqueous sodium hydroxide?A.calciumB.copperC.aluminiumD.ironObjective Show full explanation
Question 24the components present in the alloy used for welding and plumbing are A.lead and tinB.lead and antimonyC.iron and aluminiumD.copper and tinObjective Show full explanation
Question 2515cm3 of gaseous hydrogen required for the complete combustion of 75 cm3 of oxygen and yielded 45cm3 of carbon(iv)oxide. Calculate the hydrocarbonA.CH4B.C2H6C.C3H8D.C4H10Objective Show full explanation
Question 26which of the following reagents can be used to differentiate alkanals from alkanones?A.hydrogen cyanideB.sodium hydrogen C.fehlings reagentsD.2,4 dihydrophenylhydrazineObjective Show full explanation
Question 27the products of photochlorination of ethanoic acid are ..........A.CH3OOCL+HCLB. CH3COCL+HOCLC.CLCH2COCL+HCLD.CLCH2+HCLObjective Show full explanation
Question 28what are the products of the reaction between ethyl ethanoate and ammonia ...........A.aminoethane and ethanol B.aminoethane and propan-1-olC.ethanamide and ethanolD.methanamide and propa-1-olObjective Show full explanation
Question 29effervescence occurs when water comes in contact with ............A.calciumB.copperC.sulphurD.leadObjective Show full explanation
Question 30charring of sugar occurs when water comes in contact with ........A.reducedB.hydrolysedC.dehydrated D.fermented Objective Show full explanation