JAMB Chemistry 1988 past questions

In the experiment above, ammonium chloride crystals deposit on the walls of the tube is as a result of

Which of the following would support the conclusion that a solid sample is mixture?

The formula of the compound formed in a reaction between a trivalent metal M and a tetravalent non-metal X is.

The molar of carbon to hydrogen of volatile liquid compound is 1:2. 0.12 g of the liquid evaporation at s.t.p gave 32 cm3 of vapour. The molecular formula of the liquids is

2.25 g of sample of an oxide of a copper. 2.50 g of another oxide of Copper on reduction also gave2.0 g of copper. These results are in accordance with the law of

It can be deduced from the vapour of pressure curves above that.

One role of propane is mixed with five moles of oxygen. The mixture is ignited and the propane burns completely. What is the volume of the products at soap?

0.9 dm3 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 kept at 364 K. What is the volume of the gas in dm3 at this pressure?

Which of the gas laws does the above graph illustrate?

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

Which of the following physically properties decreases across the periodic table.

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

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

The molar ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospherics air because

An eruption polluted an environment with a gas suspected to H2S, a poisonous gas. A rescue team should spray the environment with

1.34 g of hydrated sodium tetraoxosulphate (V1) was heated to give an anhydrous salt weighing 0.71g. The formula of the hydrated salt.

The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is

Which of the following dilute solutions has the lowest pH value?

Which of the following in aqueous solution neutralize litmus?

What volume of a 0.1 M H3PO will be required to neutralize 45.0cm3 of a 0.2 M NaOH?

Which of the following substances is a basic salt?

Which of the following acts both as reducing and an oxidizing agent?

Which of the following reactions takes place in the cathode compartment during the electrolysis of copper (11) chloride solution?

Which of the following statements is TRUE?

Which property of 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 (111) chloride, the colour changes from yellow to green. This is because.

Carbon (11) oxide may be collected as shown above because it

In the reaction C5H10O5(s) 6C(s) + 5H2O concentrated H2SO4 is acting as

Suitable regents for the laboratory preparation of nitrogen are

The thermal decomposition of copper (ll) trioxonirate (V) yields copper (ll) oxide, oxygen and

Chlorine is produced commercially by

Which of the following is used in the manufacture of glass?

Aluminium is extracted commercially from its ore by

Given the reactions (i) Fe(s) + (NO3)2(aq) Fe(NO3)2(aq) + X(s) (ii) H2(g) + XO(s) X(s) + H2O(g), X is likely to be.

Crude copper can be purified by the electrolysis of CuSO4(aq) if

The IUPAC name for CH3 CH2 CHC CH3 OH

Alkanoates are formed by the reaction of alkanoic acids with

The four classes of hydrocarbons are

Alkanes 400-700oC smaller + alkanes +hydrogen. The above reaction is known as

In the reaction 2(C6H10O5) n + nH2O nC12H22O11 diastase is functioning as

which of the following compounds has the highest boiling point?

Detergents have the general formula

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