FUNAAB Chemistry 2017/2018 Past Questions

Each 325mg tablet of aspirin consists of 195.0mg carbon, 14.6mg hydrogen and 115.4mg oxygen. Determine its empirical formua (C = 12, H = 1, O = 16)

Identify the number of reacting units in the reaction. Cr₂O_{7^2- + 6H ---> 2Cr³⁺ + 7H2O}

Zinc oxide is a

The periodic classification of elements is an arragement of the elements in order of their

A small quantity of solid ammonium chloride (NH₄Cl) was heated gently in a test tube, the solid gradually disappears to produce two gases. Later, a white cloudy deposit was observed on the cooler part of the test tube. The ammonium chloride is said to have undergone

A volume of 42.5ml 0.125M KOH is needed to neutralize completely 37.3ml of H₃PO₄ solution. Finf the molar concentration of H₃PO₄

The number of dissolved particles in solution does not depend on one of the following

For a 0.262m solution of maltose in water, calculate the freezing point of the solution. K_f = 1.855°C^-1; K_b = 0.512°Cm^-1

For a 0.222m solution of sucrose in water, calculate the boiling of the solution; K_b = 0.512°Cm^-1; K_f = 1.855°C^-1

An element X forms the compounds with chlorine XCl₄, XCl₃ XCl₂. This illustrates the

When air which contains the gases oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are

When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as

When each of the nitrates of potassium, magnesium and iron is heated,

Consider the reaction represented by the equation N₂O₄ ----> 2NO₂(g)

A sample of hard water contains some calcium sulphate and calcium hydrogen carbonate. The total hardness may therefore be removed by

What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?

Detergents have the general formula______

The formula of the compound formed in a reaction between a trivalent metal M and a tetravalent mon-metal X is_____

2.25g of a sample of an oxide of copper on reduction gave 2.0g of copper. 2.50g of another oxide of copper on reduction also gve 2.0g of copper. These results are in accordance with the law of ________

One mole of propane is mixed with five moles of oxygen. The mixture is ignited and the propane burns completely. What is the volume of the product at s.t.p? [GM.V = 22.4dm³mol^-1]

The rate of a reaction is proportion to the number of effective collisions occuring per seconds with the reactants. This statement is associated with the

A zero order reaction is one

Which of the following physical properties decreases across the periodic table?

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

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

The reaction between an organic acid and an alcohol in the presence of an acid catalyst is known as

If 30cm³ of oxygen diffuses through a porous pot in 7 seconds, how long will it take 60cm³ of chlorine to diffuse through the same pot, if the vapour densities of oxygen and chlorine are 16 and 36 respectively

The electronic configuration of the specie underlined as in the molecule H₂S is

The funtional group(s) of an amino acid is/are_____

A student while trying to identify two gases labeled A and B, found that gas A is acidic to litmus paper and turn acidified potassium dichromate solution green, while gas B turns red litmus paper blue and forms dense white fume with hydrogen chloride. The correct identity of A and B respectively are

Which of the following titrations will have a solution with a pH greater than 7 at the end point (equivalence point) of the titration?

9.0dm³ of a gas at s.t.p was subjected by means of a movable piston to two times the original pressure with the temperature being now at 364K. What is the volume of the gas in dm³ at this pressure?

An increase in the temperature causes an increase in the pressure of a gas because there is an increase in the

The forces holding naphthalene crystals together can be overcome when naphthalene is heated to a temperature of 354K resulting in the crystals melting. These forces are known as_____

A metallic ion X²⁺ with an inert gas structure contains 18 electrons. How many protons are there in this ion?

The dependence of rate reaction on temperature is given by

Which of the following gases may not be dried with concentrated sulphuric acid?

Metal salts of long chain fatty acids are known as

Cellulose and starch can be classified as one of the following

Which of the following is NOT a redox reaction?

Which of the following processes leads to increase in entropy?

Which of the following statements is true?

A liquid begins to boil when

An element which exists in more than crystalline form is said to exhibit

A mixture of starch solution and potassium oxide was placed in a test tube. On adding dilute tetraoxosulphate (VI) acid then K₂Cr₂O₇ solutions, blue-black colour was produced. In this reaction, the

Which of the following statements is true?

Which property of a reversible reaction is affected by a catalyst?

Which of the following is used in fire extinguishers?

When H₂S gas is passed into a solution of iron (III) chloride, the colour changes from yellow to green. This is because

Suitable reagents for the laboratory preparation of nitrogen are _______