a) Element R – Sulphur
b) Mix solid P oxide with water
Put blue and litmus paper, Blue litmus paper remains blue, red litmus paper changes to blue.
Put blue and red litmus papers in water
Blue changes to red, red remains red.
maurice.mutuku answered the question on October 11, 2019 at 08:23
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Explain(Solved)
It is advisable to set a Bunsen burner to luminous flame prior to an experiment.
Explain
Date posted: October 11, 2019. Answers (1)
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questions that follow:(Solved)
The diagram below shows the heating curve of a pure substance. Study it and answer the
questions that follow:
(a) What physical changes are taking place at points X and Z?
(b)Explain what happens to the melting point of sodium chloride added to this substance
Date posted: October 11, 2019. Answers (1)
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(Letters given are not real symbols)(Solved)
Study the information in the table below and answer questions that follow.
(Letters given are not real symbols)
Explain why the ionic radius of :-
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(b) C2+ is smaller than the of A+
Date posted: October 11, 2019. Answers (1)
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Explain how the parts labelled T and U are suited to their functions
Date posted: October 11, 2019. Answers (1)
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Date posted: October 11, 2019. Answers (1)
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State the identity of;
(i) P
(ii) W
Date posted: October 11, 2019. Answers (1)
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The diagram below shows three methods for collecting gases in the laboratory
(a) Name the methods A and B
(b) From the methods above, identify one that is suitable for collecting sulphur (IV) oxide.
Explain
Date posted: October 11, 2019. Answers (1)
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Give two drugs that are commonly abused by the youth.
Date posted: October 11, 2019. Answers (1)
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Date posted: October 11, 2019. Answers (1)
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Date posted: October 11, 2019. Answers (1)
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The diagram below gives the observations that were made(Solved)
Wooden splints F and G were placed in different zones of a Bunsen burner flame.
The diagram below gives the observations that were made
(a) Explain the difference between F and G
(b) Name the type of flame that was used in the above experiment
Date posted: October 11, 2019. Answers (1)
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Date posted: October 1, 2019. Answers (1)
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The set-up below shows the products formed when solid lead (ii) nitrate is heated.
a) Identify:
(i) Liquid X
(ii) Gas Y
b) When lead (ii) Nitrate crystals are heated, they decrepitate and decompose, what is meant by the term decrepitating?
Date posted: October 1, 2019. Answers (1)
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The following diagram shows the effect of electric current on lead (II) Chloride.
a) When the circuit was completed no current flowed. Explain why.
b) When lead (II) Chloride was heated to about 300 degrees C, it melted and there was light on the bulb. State and explain the observation made at the anode.
Date posted: October 1, 2019. Answers (1)
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Explain using chemical means how you would differentiate between carbon (II) oxide and carbon (IV) oxide.
Date posted: October 1, 2019. Answers (1)
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Study the table below and answer the questions that follow.
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Date posted: October 1, 2019. Answers (1)
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The diagram below shows the effect of sunlight on chlorine water.
a) Identify gas W
b) Write an equation to show the formation of gas W
c) Which compound is left in the beaker after complete formation of gas W?
Date posted: October 1, 2019. Answers (1)
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Study the flow chart below and answer the questions that follow.
a) Identify gas X
b) Write an equation for the reaction between ammonia and gas X
c) Write an equation to show the formation of G and J
Date posted: October 1, 2019. Answers (1)
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Form two students from Anestar Premier High School reacted three elements as shown in the table below.
Which element (s) is likely to be:
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ii) Metal (s)
iii) Insoluble in water
Date posted: October 1, 2019. Answers (1)
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If 25.0cm3 of 0.1 M H2SO4 solution neutralized a solution containing 1.06g of sodium carbonate in 250cm3 of solution, calculate the molarity and volume of the sodium carbonate solution used.
Date posted: October 1, 2019. Answers (1)