UNIBEN General Paper 2020/2021 Past Questions

Simplify $$(\frac14)^{-1\frac12}$$

Simplify ³√(64r-6)^1/2

What is the difference between 0.007685 correct to three significant figures and 0.007685 correct to four places of decimal?

If a block of height 2.5 cm represents 100 goats, how high should the block be to represent 170 goats.

Oke deposited ₦800.00 in the bank at the rate of 12½% simple interest. After some time, the total amount was one and half times the principal. For how many years was the money left in the bank?

If x = 1 is root of the equation x³ - 2x² - 5x + 6, find the other roots

Find the probability that a number selected at random from 40 to 50 is a prime number

If the lengths of the sides of a right angled triangle are (3x + 1)cm, (3x - 1)cm and x cm, what is x?

A number of pencils were shared out among Peter, Paul and Audu in the ratio 2:3:5 respectively . If Peter got 5, how many were shared?

If $$(\frac34)^x (\frac23)^y = \frac{32}{27}$$, find the value of 3y - 2x

The velocity of sound in air is independent of

A body of mass 4kg is accelerated from rest by a steady force of 9N. What is its velocity when it has travelled a distance of 8m?

I. Directed towards a fixed point \n II. Direct away from a fixed point \n III. Directly proportional to its displacement from the fixed point \n Inversely proportional to its displacement from the fixed point. \n From the information above, a body performing simple harmonic motion is one whose acceleration is

Calculate the force between two planets of mass 3.0 x 10¹⁵kg and 1.5 x 10²⁰kg if their centres are 8.0 x 10¹⁰m apart. [G = 6.67 x10^-11Nm²kg^-3

A load of 5N gives an extension of 0.56cm in a wire which obeys Hook's law. what is the extension caused by a load of 20N

A solid weights 10.0N in air, 6.0N when fully immersed in water and 7.0 N when fully immersed in certain liquid x. calculate the relative density of the liquid.

When the temperature of a liquid is increased, its surface tension.    

An astronomical telescope is said to be in adjustment when the 

When a ship sails from salt water to fresh water, the fraction of its volume above the water surface will 

The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine? 

A 50.0mg supply of iodine -131, used in hospital in the treatment of hyperthyroidism was stored for 32.4 days. If the half-life of iodine - 131 is 8.1 days, how many milligrams remain?

Radioactive changes differ from ordinary chemical changes in that radioactive changes

The addition of water to calcium oxide leads to

A colourless solution was tested with Tollen's reagent, the colourless solution gave a silver mirror. This indicates the presence of

The metal used to recover copper from a solution of copper sulphate is

The boiling point of a liquid such as methanol is the temperature at which its

Alkenes and ________ are compounds that contain a multiple bond each.

A palm fruit dropped to the ground from the top of a tree 45m tall, how long does it take to reach the ground? (g = 10m/s²)

___________ is due to the formation of hydrogen gas bubbles around the copper plate of a simple cell

Which of the following can be explained by the kinetic theory? I. the physical state of matter. II. Diffusion of gases III. Melting of solid IV. Evaporation of liquids

The following statements were made by some students describing what happened during an experiment to determine the melting point of solids i. The temperature of the solid was constant until melting started
ii. The temperature of the solid rose until melting started
iii. During melting, the temperature was rising
iv. During melting, the temperature was constant
v. The temperature continued to rise after all the solid had melted
vi. Temperature stopped rising after the sold had melted.
Which of the following gives correct statements in the right order?

When some grains of table salt were put in a cup of cold water, kept at constant temperature and left undisturbed, all the water tasted salty after some time. This is due

Given that the latent heat of fusion of ice is 80cal/g, how much heat will change 100g of ice at 0°C into water at the same temperature?

What are the possible oxidation numbers for an element if its atomic number is 17?

The energy change accompanying the addition of an electron to gaseous atom is called?