2013 JAMB UTME Chemistry Past Questions

2013

The shape of the carbon (lV) oxide molecule is

2013

The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is

2013

The rate of diffusion of a gas Y is twice that of Z If the relative molecular mass of Y is 64 and the two gases diffuse under the same conditions, find the relative molecular mass of Z

2013

What volume of carbon (ll) oxide is produced by reacting excess carbon with 10 dm3 of oxygen?

2013

The presence of an impurity in substance will cause the melting point to

2013

An example of a hygroscopic substance is

2013

Steam changes the colour of anhydrous cobalt (ll) chloride from

2013

The constituent of air that acts as a diluent is

2013

The bond formed between two elements with electron configurations 1s2 2s2 2p6 3s2 and 1s2 2s2 2p4 is

2013

Which of the following molecules is held together by hydrogen bond?

2013

Three drops of a 1.0 mol dm-3 solution of HCl was added to 20 cm3 of a solution of pH6.4. The pH of the resulting solution will be

2013

10.0 dm3 of water was added to 2.0 mol dm-3 of 2.5dm3 solution of HCl. What is the concentration of the final solution in mol dm-3?

2013

In a water body, too much sewage leads to

2013

The solvent used for removing grease stain is

2013

If 24.4 g of lead (ll) trioxonitrate (V) were dissolved in 42 g of distilled water at 20oC; calculate the solubility of the solute in gdm-3.

2013

Calculate the volume in cm3 of oxygen evolved as s.t.p. when a current of 5 A is passed through acidified water for 193s{F = 96500 Cmol-1, Molar volume of a gas at s.t.p. = 22.4 dm3}

2013

In an electrochemical cell, polarization is caused by

2013

2H2O (l) + 2F2(g) → 4HF(aq) + O2(g).In the reaction above, the substance that is being reduced is

2013

An insoluble salt can be prepared by

2013

Which of the following substances is not a salt?

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