Recent questions without a selected answer

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1 answer

Cracking can also be achieved using less amount of heat in the presence of a catalyst. Name one catalyst that is often used.

asked Aug 17, 2021 in Chemistry Form 3 by anonymous

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1 answer

One mole of heptane was thermally cracked, two hydrocarbons Q and P were formed. Q was an alkene molecule with three carbon atoms.

asked Aug 17, 2021 in Chemistry Form 1 by anonymous

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1 answer

Sodium metal reacts with air to form two oxides. Give the formulae of the oxides.

asked Aug 17, 2021 in Chemistry Form 3 by anonymous

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1 answer

Explain why aqueous sodium chloride is not suitable as an electrolyte for the manufacture of sodium in the Downs process.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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1 answer

Below is a simplified diagram of the Down’s cell used for the manufacture of sodium. Study it and answer the questions that follow.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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1 answer

Study the information below and answer the questions that follow. The letters do not represent the actual symbols of the elements.

asked Aug 17, 2021 in Chemistry Form 2 by anonymous

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1 answer

Study the table below and answer the questions that follow.

asked Aug 17, 2021 in Chemistry Form 1 by anonymous

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1 answer

State one use of C2H4.

asked Aug 17, 2021 in Chemistry Form 3 by anonymous

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A student in form three was given two gases C2H6 and C2H4. He added acidified Potassium Manganate (VII) to each solution. State the observations the student made.

asked Aug 17, 2021 in Chemistry Form 3 by anonymous

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1 answer

State the function of each of the following in the solvay process of production of Sodium Carbonate.

asked Aug 17, 2021 in Chemistry Form 2 by anonymous

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Electrode potentials for the half cells are shown below. Use the information to answer the questions that follow.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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1 answer

The diagram below is used to prepare nitrogen (IV) oxide gas.

asked Aug 17, 2021 in Chemistry Form 3 by anonymous

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1 answer

Given that the hydration energies of Ca2+(g) and Cl-(g) are -1562KJ/Mole and -364KJ/Mole respectively. The heat of solution (Hsoln) for one Mole of CaCl2 is -82.9 KJ/Mole. Determine the lattice energy for CaCl2.

asked Aug 17, 2021 in Chemistry Form 3 by anonymous

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1 answer

A mixture of Hydrogen gas and Carbon (IV) oxide are passed through Potassium hydroxide solution as shown below.

asked Aug 17, 2021 in Chemistry Form 1 by anonymous

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1 answer

Using dot (.) and cross (x) diagram show the type of bond present in hydrogen ion, H3O+ (H = 1, O = 8)

asked Aug 17, 2021 in Chemistry Form 1 by anonymous

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1 answer

An ion T2- has an electronic arrangement of 2.8

asked Aug 17, 2021 in Chemistry Form 2 by anonymous

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1 answer

10cm3 of a gaseous hydrocarbon, CxHy required 30cm3 of oxygen for complete combustion. If steam and 20cm3 of Carbon (IV) oxide were produced, what is the value of x in CxHy.

asked Aug 17, 2021 in Chemistry Form 3 by anonymous

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2 answers

State Gay-Lussac’s law

asked Aug 17, 2021 in Chemistry Form 3 by anonymous

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1 answer

The set-up below was used to prepare a solution of hydrogen chloride gas

asked Aug 17, 2021 in Chemistry Form 2 by anonymous

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1 answer

In terms of structure and bonding explain the following

asked Aug 17, 2021 in Chemistry Form 2 by anonymous

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