UNIBEN General Paper 2006/2007 Past Questions

Sodium chloride maybe obtained from brine

Which of the following is a chemical compound

Crystallization is a separation method used

Which of the following is not a mixture?

Carbon forms two oxides. ratio of oxygen in both oxides is 1:2, if one mole of carbon separately combined with oxygen, deduce the formula of the oxides

How much volume of ethane will be required to produce 12.4dm³ of carbon (IV) oxide on combustion in sufficient oxygen?

By how much would the volume have increased when 10dm³ of ozone were converted to oxygen 2O₃(g)→3O₂

The pressure exerted by ba gas is as a result of

Which of the following gas will diffuse at the slowest rate

Electronic P has an electronic configuration of 2,3,6. element R has an electronic configuration of 2,8,8,1. what is likely to form if P and R combine?

Which is the atomic structure of phosphorus with mass number of 31?

Which has the least tendency to form positive ions

What is the number of pairs of shared electrons in methane molecules

The percentage by volume of nitrogen in air is high because

Natural water includes the following except

Which of the following cannot be used to remove permanent hardness of water?

If the solubility of sodium tetraoxosulphate (IV) at 30° is 18g per 100g. how much is this in gramme per kilogram?

The following are example of colloid except

Oil spillage in ponds and creeks is cleaned by

The pH of the solution M,N,O, and P are 1,6,8 and 10 respectively, therefore

Which hydroxide dissolves in water to give an alkaline solution?

Starch molecules can be broken down into smaller molecules by heating in a dilute acid. what is this type of reaction called?

Which of the following cannot be used as an oxidizing agent?

What quantity of copper will be deposited by the same quantity of electricity that deposited 18g of aluminium (Al=27,Cu=64)

Which of the following is not true about semi conductors?

A wire carrying a current of 10A and 2.5m in length is placed in a field of flux intensity 0.14T. what is the force in the wire if it is placed at 60° to the field?

In transformer, the magnetization of the core is repeatedly reversed by the alternating magnetic field resulting in energy dissipation as heat. this loss is called

A step-up transformer is designed to operate from a 25V supply. if the transformer is 80% efficient, determine the current in the primary coil when the output terminals are connected to 240V, 100W lamp

Which of the following pair consists of the fundamental quantities

One of the limitations of thompson's model of the atom is that it does not explain

An atom is said to be excited if an electron of the atom is

The minimum energy necessary to remove an electron from a givena tom is called

A body is projected with a velocity Vms-1, inclined at an angle β to the vertical. which of the following gives the correct expression for the horizontal component o velocity Vx after time t?

An object of mass 0.2kg and density 600kgm^-3 is suspended with a string so that ¹/₁₀ of it is immersed in paraffin of density 900Kgm^-3. find the tension in the string

A rocket burns fuel at the rate of 20Kgs^-1 and ejects it with a velocity of 5.0×10ms^-1. calculate the thrust exerted by the gas on the rocket

A converging lens has radius of curvature 16.0cm, calculate the power of the lens

If the velocity in air is 3.0×10⁸ms^-1, find the velocity of light in a medium whose refractive index is 1.5

When an object is at infinity to the pole of a concave mirror the image formed is at

A total eclipse of the sun is seen when the observer is in the

A loud drawn sound arising from overlapping reflections together with the original sound which gives rise to the reflections is called

Which of the following radiations is used to examine the freshness or staleness of eggs in poultry?

Which of the following is not correct about electromagnetic waves?

A simple cell with mercury amalgamated zinc plates minimizes

When two genes for the same character (alleles) are contained in the same individual. the character that shows it's effect is known as

In nigeria a tropical rain forest can be found in

The sum total of the biotic factors that affect living things is referred to as

Hygrometer is an ecological instrument that measures

Which of the following air pollutant causes acid rain?

Which of the following does not have a well developed tissue?

Which of the following diseases is airborne?