Recent questions without an upvoted answer

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"Kuukata mkono niliostahili kuubusu yalinifika ya kunifika"

asked Jul 5, 2021 in Chozi la Heri by Rowlingso

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1 answer

An ore is suspected to contain mainly sodium. Describe a method that can be used to confirm the presence of sodium in the ore.

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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1 answer

Sodium is extracted from its ore by the electrolysis process. Name the chief ore from which sodium is extracted from.

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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1 answer

Identify substances : (2 marks) Gas B Liquid C Gas D Which property of concentrated sulphuric (VI) acid is being demonstrated by formation of the black solid (

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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1 answer

Air was passed through reagents as shown below.

asked Jul 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

Explain why hard water flowing in lead pipes may be safer for drinking than soft water flowing in the same pipes

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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1 answer

In terms of structure and bonding, explain why propane (RMM=44 ) is a gas at room temperature while ethanol (RMM=46) is a liquid at room temperature

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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In an experiment to determine the solubility of solid W in water at 400c, the following results were obtained.

asked Jul 5, 2021 in Chemistry Form 1 by anonymous

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2 answers

Define solubility.

asked Jul 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

Study the flow chart below and use it to answer the questions that follow.

asked Jul 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

The diagram below shows an experiment involving chlorine water.

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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1 answer

Highlight the steps followed when lighting a Bunsen burner

asked Jul 5, 2021 in Chemistry Form 1 by anonymous

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With the aid of a well labeled diagram, show that the almost colourless region of a non luminous flame consist of unburnt gases

asked Jul 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

State one use of radioactivity in agriculture.

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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A radioactive isotope M decays by emitting two alpha and a beta particle to form 206 83Y.

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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1 answer

A student burnt magnesium ribbon in a gas jar full of sulphur (IV) oxide gas.

asked Jul 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

Given that the structure of soap is C17H35COONa.

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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1 answer

A student fetched water from a river in a limestone area. He used it for washing and realized that it did not lather easily. On boiling, the water lathered easily .When he added washing soda, it again lathered easily

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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100cm3 of Carbon (IV) Oxide diffuses through a porous plate in 30 seconds. Calculate the time taken by 75cm3 of Nitrogen (IV) Oxide to diffuse through the same plate under similar conditions. (C = 12, 0 = 16, N = 14)

asked Jul 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

State Graham’s law of diffusion.

asked Jul 5, 2021 in Chemistry Form 3 by anonymous

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