Recent questions in Chemistry Form 2

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1 answer

The atomic number of element A is 11 and that of B is 8

asked Jul 7, 2021 in Chemistry Form 2 by anony mous

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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

Study the table below and use it to answer the questions that follow. (The letters do not represent the actual symbols of the elements). Element S P Q R T Atomic Number 5 20 3 18 5 Atomic mass 10 40 7 40 11 Select two letters that represent a pair of isotopes

asked Jul 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

State two applications of using impurities to lower the melting point of substances.

asked Jul 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

Calculate the volume of carbon(IV)oxide in 9,000 m3 of air contained in a room.

asked Jul 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

Why is the percentage of carbon (IV) oxide in the atmosphere fairly constant?

asked Jul 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

The figure below shows variation of number of outermost electrons (1) with atomic number of elements in the periodic table

asked Jun 22, 2021 in Chemistry Form 2 by anony mous

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1 answer

Consider the following reaction. H2S+Cl2 →2HCI+S

asked Jun 22, 2021 in Chemistry Form 2 by anony mous

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Salts may be classified as soluble or insoluble. Select from the following list a pair of compounds that can be used to prepare a soluble and an insoluble salt

asked Jun 22, 2021 in Chemistry Form 2 by anony mous

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1 answer

Compound V reacts with water as shown in the following equation. V+H2O → CH3CH2CH2OH

asked Jun 22, 2021 in Chemistry Form 2 by anony mous

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1 answer

peroxide decomposition Sodium carbonate is prepared on large scale by the Solvay process. The equation for the main reaction that takes place in the carbonator is: NaCl(aq) + NH3(g) + CO2(g)+ H2O(l) → NH4Cl(aq) + NaHCO3(s)

asked Jun 21, 2021 in Chemistry Form 2 by anony mous

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1 answer

Study the information in the table and answer the questions that follow. The elements belong to the same chemical family. (The letters are not actual symbols of the elements)

asked Jun 21, 2021 in Chemistry Form 2 by anony mous

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1 answer

When chlorine is bubbled through hot concentrated sodium hydroxide solution, sodium chlorate(V), sodium chloride and water are formed.

asked Jun 21, 2021 in Chemistry Form 2 by anony mous

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1 answer

State the difference between a covalent bond and a dative covalent bond.

asked Jun 21, 2021 in Chemistry Form 2 by anony mous

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1 answer

Study the setup in the Figure below and then answer the questions that follow.

asked Jun 21, 2021 in Chemistry Form 2 by anony mous

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1 answer

Element A has mass number 40 and 21 neutrons

asked Jun 21, 2021 in Chemistry Form 2 by anony mous

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