1993 JAMB UTME Chemistry Past Questions

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1993

For iodine crystals to sublime on heating, the molecules must acquire energy that is?

1993

How many moles of oxygen molecules would be produced from the decomposition of 2.50 moles of potassium trioxochlorate (V)?

1993

A balanced chemical equation obeys the law of?

1993

Which of the following substances is a mixture?

1993

Water has a rather high boiling point despite its low molecular mass because of the presence of?

1993

Which group of elements forms hydrides that are pyramidal in structure?

1993

As the difference in electronegativity between bonded atoms increases, polarity of the bond?

1993

Two atoms represented as U and U are?

1993

An element, E, has the electronic configuration 1s22s22p63s2p3. The reaction of E with a halogen X can give?

1993

A student prepares 0.5 M solution each of hydrochloric and ethanoic acids and then measured pH. The result would show that the?

1993

The phenomenon whereby sodium trioxocarbonate (IV) decahydrate loses some of its water of crystallization on exposure to the atmosphere is known as?

1993

Water can be identified by the use of?

1993

The air around a petroleum refinery is most likely to contain?

1993

Argon is used in gas-filled electric lamp because it helps to?

1993

The oxidation states of chlorine in HOCL, HCLO3 and HCLO4 are respectively?

1993

Which of the reactions occurs at the anode during the electrolysis of a very dilute aqueous solution of sodium chloride?

1993

During the electrolysis of a salt of a metal M, a current of 0.5 A flows from for 32 minutes 10 seconds and deposits 0.325 g of M, What is the charge of the metal ion?(M = 65, If = 96,500 C per mole of electron)

1993

4.0 g of sodium hydroxide in 250 cm3 of solution contains?

1993

NH3 + H3O+→ NH4+ + H2O. It may be deduced from the reaction above that?

1993

Which of these gases can be dried with concentrated H2SO4?

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