Use the reactions given below to answer the questions that follow. The letters do not represent the actual symbols of the elements
(a) What name is given to the type of reaction given above?
(b) Arrange the elements D, E, F and G in the order of their reactivity starting with the most reactive (c) Complete the equation below
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answers
State and explain how the rate of reaction between zinc granules and steam can be increased
answer
When potassium nitrate is heated, it produces potassium nitrate and gas C
(a) Identify gas C (b) Name the type of reaction undergone by the potassium nitrate
answer
(a) Write the electronic configuration of calcium ( atomic number 20 ) and beryllium (atomic number 4)
(b) Why is calcium more reactive than beryllium
answers
The following two tests were carried out on chlorine water contained in two test tubes
(a) A piece of blue flower was dropped into the first – tube. Explain why the flower was bleached (b) The second test- tube was corked and exposed to sunlight after a few days, it was found to contain a gas that rekindled a glowing splint. Write an equation for the reaction which produced the gas
Give one example of elements A and B
A B
ANSWER
Oxygen and sulphur belong to group (VI) of the periodic table. Explain why there is a big difference their (melting points of oxygen is –2160C while that of sulphur is 440C.
ANSWER
Name One property of neon that makes it possible to be used in electric lamps
ANSWERS
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