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Chemistry 2001 Waec Past Questions and Answers

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Chemistry 2001 Waec Past Questions


Question 41 :



What volume of hydrogen will be produced if 100cm3 of ammonia is completely decomposed at constant temperature and pressure? The equation for the reaction is 2NH3(g) → N2(g) + 3H2(g)

A. 50cm3
B. 150cm3
C. 200cm3
D. 300cm3


Question 42 :



The gas given off when NH4Cl is heated with an alkali is

A. H2
B. CI2
C. N 2
D. NH 3


Question 43 :



A major factor coonsidered in selecting a suitable method for preparing a simple salt is its

A. Crystalline form
B. Melting point
C. Reactivity with dilute acids
D. Solubility in water


Question 44 :



Which of the following acids forms normal salts only?

A. Tetraoxosulphate (VI) acid
B. Trioxosulphate (IV) acid
C. Tetraoxophosphate (V) acid
D. Trioxonitrate (V) acid


Question 45 :



A subtance is said to be hygroscopic if it absorbs

A. Water from the atmosphere to form a solution
B. Heat from the surrounding
C. Carbon (IV) oxide from the atmosphere
D. Moisture from the atmosphere without dissolving






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