NDA Chemistry 2010/2011 Past Questions

Fractional distillation of crude oil from Kaduna Refinery produces gasoline, kerosene, aviation fuel and diesel oil. Which of the fractions has a higher proportion of light hydrocarbons'?

Alkaline hydrolysis of vegetable oil produces fatty acids and glycerol. The latter can be separated from the mixture by:

The molecule HOCH₂CH = CHClCH₃ is called:

During electrolysis of a silver salt, 10920 coulombs of electricity was passed. The number of moles of silver metal deposited its:

Copper (II) Oxide is an example of:

What is the PH of a 0.20M solution of HCl?

What is the molarity of 25cm³ of a solution which contains 5.85g NaCl?

Which of the following compounds is not aromatic'?

²²²₈₈R → ²¹⁸₈₆X → ⁴₂He
The above nuclear reaction is an example of:

The following are methods of preparing bases except:

The alkenes form a homologous series of saturated hydrocarbons. They have a general molecular formula of:

Alkynes have a carbon-carbon triple bond with a general molecular formula of:

How many empty orbitals have nitrene

Which of the following contain carbon that is SP-hybridized?

The noble gases (group 0) of the periodic table have filled

To achieve stability, an element gains or loses the number of electrons equal to its:

Which of the following metals is not normally extracted by chemical reduction because of its position in the electrochemical series

Which of the following represents a redox reaction?

If an element has the electronic configuration 1s²2s²2p⁶3s²3p⁴ It is:

In which of the following are the elements arranged in decreasing order of electron affinity?

The acid which occurs in ants, stinging betties, pine needles and bees is:

Bohr’s model of the atom can be used to explain:

Crystals in which all the atoms are linked by a continuous system of well-defined electron pair bonds are called:

Which of the following is/are true of Avogadro number?

The heat change associated with a given chemical change is always constant and is independent of time and of any intermediate changes involved. This is

Electro-valent bond is best favoured by:

Which of the following is most correct of a double salt?

The normal boiling point of a liquid is the temperature at which:

In carbon atom, the wave functions for the respective electrons can be represented thus.

The formula CH₂O for ethanoic acid is regarded as its____

Which of the following gases contains the least number of atoms at s.t.p.?

The chromatographic separation of ink is based on the ability of the components to

A compound contains 31.91% potassium 28.93% chlorine and the rest oxygen. What is the chemical formula of the compound?

A little quantity of trichloromethane (b.pt 60°C) was added to a large quantity of ethanol (b.pt.78 °C-74 °C). The most probable boiling point of the resultant mixture is from

The gas that gives brown colouration in brown ring test is

Which of the following gives a precipitate when treated with NaOH solution?

The reaction of an alkene with hydrogen in the presence of a catalyst is

A rock sample was added to cold dilute HNO₃. The gas evolved was passed into a solution of acidified K₂Cr₂O₇ and the solution turned green. The rock sample contains

The intermediate product formed when ethanol is progressively oxidized to ethanoic acid with potassium heptaoxodichromate (VI) is

The nucleus of an atom consists of ___.