Questions by anony mous

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1 answer

The grid below shows part of the table. The letter is not the actual chemical symbols of the elements. Study it and use it to answer the question that follows.

asked Aug 18, 2021 in Chemistry Form 1

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1 answer

Nitrogen gas is used as an inert atmosphere in electric lamps. Explain in terms of structure and bonding why nitrogen gas is so stable .

asked Aug 18, 2021 in Chemistry Form 2

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1 answer

A student used the setup below to prepare oxygen gas in the laboratory. Study it and answer the questions that follow.

asked Aug 18, 2021 in Chemistry Form 1

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1 answer

The diagram below represents the extraction of sulphur by Frasch process

asked Aug 18, 2021 in Chemistry Form 3

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1 answer

Dilute hydrochloric acid was added to a compound Z of sodium. The solid reacted with the acid to form a colorless solution H and a colourless gas K which formed a white precipitate when bubbled through lime water. Write the formula of:

asked Aug 18, 2021 in Chemistry Form 2

0 votes

2 answers

Draw the structure of a sulphur molecule.

asked Aug 18, 2021 in Chemistry Form 2

0 votes

1 answer

Define the term transition temperature concerning the allotropes of sulphur.

asked Aug 18, 2021 in Chemistry Form 2

0 votes

1 answer

The equation below shows the action of heat on three metal nitrates.

asked Aug 18, 2021 in Chemistry Form 2

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1 answer

Chlorine water was exposed to sunlight for a few hours .Colourless gas F was collected in the boiling tube as shown.

asked Aug 18, 2021 in Chemistry Form 1

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2 answers

Explain how you would show chemically that a given gas is ammonia.

asked Aug 18, 2021 in Chemistry Form 3

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1 answer

A sample of air contaminated with carbon monoxide and sulphur dioxide was passed through the apparatus shown in the diagram below.

asked Aug 18, 2021 in Chemistry Form 2

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2 answers

Graphite is a non metal, yet it conduct an electric current .explain this observation.

asked Aug 18, 2021 in Chemistry

0 votes

1 answer

The diagram below shoes the bonding between aluminium chloride and ammonia

asked Aug 18, 2021 in Chemistry Form 2

0 votes

1 answer

The set up below was used to collect gas Z produced by the reaction between water and calcium metal. set up on water and calcium metal reaction Give a chemical test for gas Z. 2mks Write the equation of the reaction between the calcium metal and water.

asked Aug 18, 2021 in Chemistry Form 1

0 votes

1 answer

20cm3 of oxygen diffused through a porous partition in 70s .how long would it take 20cm3. Of sulphur VI oxide to diffuse through the same portion under the same condition.

asked Aug 18, 2021 in Chemistry Form 3

0 votes

1 answer

The rate of diffusion of neon was found to be 1.45 times faster than that of an equa! volume of gas X at room temperature. Determine the relative formula mass of gas X (Ne = 20.0).

asked Aug 18, 2021 in Chemistry Form 3

0 votes

1 answer

Name two other gases which could be used to reduce copper II oxide.

asked Aug 18, 2021 in Chemistry Form 2

0 votes

1 answer

Hydrogen was passed over copper II oxide in a combustion tube.

asked Aug 18, 2021 in Chemistry Form 1

0 votes

1 answer

A compound W consist of 26.7%carbon, 2.2% hydrogen and the rest oxygen. It has a relative formula Mass of 90(C=12, H=1, O=16,)

asked Aug 18, 2021 in Chemistry Form 3

0 votes

1 answer

Explain the following observations

asked Aug 18, 2021 in Chemistry Form 2

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