Chemistry Past Questions

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3861

Which or the following substances is a polypeptide?

A. Starch
B. Glycogen
C. Protein
D. Fats

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3862

Which or the following products could be formed during incomplete combustion of a hydrocarbon.

i.Carbon ii. Hydrogen III. Carbon (Il) oxide

A. I only
B. I and II only
C. I and III only
D. II and III only

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3863

What quantity of electrons is lost when one mole of iron (II) ions is oxidized to iron (III) ?

A. 0 mole
A. 3 moles
B. I mole
C. 2 moles

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3864

What is the mass of silver deposited when 24,125 C of electricity is passed through a solution or silver salt.

[Ag = 108, IF = 96,500 C ]

A. 432g
B. 108g
C. 54g
D. 27g

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3865

Equal masses of calcium trioxocarbonate(iv) were added to dilute hydrochloric acid at the temperature specified. Under which of the following conditions would the reaction be slowest?

A. Calcium trioxocarbonate ( iv ) chips a 20°C
B. CalcIum trioxocarbonate (IV) chips at 40°C
C. Calcium trioxocarbonate (IV) powder at 20'C
D. Calcium trioxocarbonate (IV) powder at 40'C

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