UNIBEN General Paper 2019/2020 - Model Past Questions

The maximum density of water occurs at a temperature of

A certain far sighted person cannot see objects that are closer to the eye than 50cm clearly. Determine the power of the converging lens which will enable him to see at 25cm.

Where can a man place his face to get an enlarged image when using a concave mirror to shave?

A transverse wave can be distinguished from a longitudinal wave by

A machine is used to lift a load of 20N through a height of 10m.• If the efficiency of the machine is 40%, how much work is done?

An observer hears an echo 1.28 seconds after blowing a whistle near a cliff. Calculate the distance of the observer from the cliff. [Speed of sound in air = 330ms^-1]

A quantity of water at 20°C is mixed with another quantity of water at 70°C. The final steady temperature of the mixture is 40°C. Determine the ratio of the mass of the cold water to that of the hot water.

A car traveling at 30ms^-1 overcomes frictional resistance of 100N while moving. Calculate the power developed by the engine. [1hp = 0.75kW]

A glass block of thickness 10cm is placed on an object. If an observer views the object vertically, the displacement of the object is

A body of mass Mkg rests on a plane inclined at an angle θ to the horizontal. The component of the weight of the body parallel to the plane is

Two equal bulbs, one containing ammonia and the other nitrogen, are opened mouth-to-mouth to each other at room temperature. The entropy in the mixture of gases is likely to

The basic assumption in the kinetic theory of gases that the collisions of the gaseous molecules are perfectly elastic implies that the

If 10.5g of lead (II) trioxonitrate (V) is dissolved in 20cm³ of distilled water at 18°C, the solubility of the solute in mol dm³ is [Pb = 207, N = 14, 0 = 16]

The shape of a graphite crystal is

Rare gases are stable because they

A gas exerts pressure on its container because

Lucas reagent is used to test for

Consider the following reaction: $${SO^{2+}_{4(aq)} + 2H^+_{(aq)} + ye^- \rarr SO^{2-}_{4(aq)} + H_2O_{(l)}}$$. The value of y in the equation is

One of the products of the thermal decomposition of sodium trioxonitrate(V) is

What happens at the cathode during electrolysis? The

Which of the following components make up an ecosystem?

Low annual rainfall, sparse vegetation, high diurnal temperatures and cold nights are characteristic features of the

In both dicotyledonous and monocotyledonous plants, the root hairs originate from the

A person suffering from obstruction of the bile duct is advised not to eat fat and oil because

The capillarity of a soil refers to

The blood component that has the greatest affinity for oxygen is the

Which of the following traits is not inheritable? Ability to

The axial skeleton is found in the

Which of the following organisms is mainly found in the marine habitat?

Which of the following natural resources is most readily available to all organisms?