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A weak acid is one which
According to the collision theory of reaction rates, which of the following conditions is not required for two molecules to react? The molecules must
The following organic compounds are polymers except
A saturated solution at 30\(^0\)C will normally produce crystals at a temperature of
Ethane of volume 400 cm\(^3\) was completely burnt in excess oxygen according to the following equation:
2C\(_2\)H\(_6\)\(_(g)\) + 7O\(_2\)\(_(g)\) → 6H\(_2\)O\(_(g)\) + 4CO\(_2\)\(_(g)\)
Calculate the volume of steam that would be produced.
Catalysts alter reaction rates by
The percentage by mass of Oxygen in MgSO\(_4\).7H\(_2\)O is [ M\(_r\) of MgSO\(_4\).7H\(_2\)O = 246 ]
Which of the following household liquids would be effective in treating someone with too much acid in the stomach?
Isotopes of the same element have similar chemical properties because they have the same number of
The number of shared pair of electrons in a molecule of methane is
Naturally occurring Boron is made up of 19.9% \(^{10}\)B and 80.1% \(^{11}\)B. The relative atomic mass of Boron is
Consider the reaction represented by the equation:
C\(_3\)H\(_8\) + 5 O\(_2\) → 3CO\(_2\) + 4H\(_2\)O
If 0.1 mole of C\(_3\)H\(_8\) was completely burnt, what volume of CO\(_2\) would be produced at stp? [volume of gas at stp = 22.4dm\(^3\)mol\(^{-1}\)].
Which of the following arrangements of elements is in order of increasing ionization energy?
Aluminium is suitable for making alloys for aircraft construction because it
Which of the following statements describes transition elements? They
The reaction represented by the equation: Ni\(^{2+}\)\((_{aq}\)) + Fe\((_s\)) → Ni\((_s\)) + Fe\(^{2+}\)\((_{aq}\)) is a redox reaction because
At 25\(^0\)C, the saturated solution of a salt in water was found to contain 0.24g of the salt in 100cm\(^3\). What is the solubility of the salt in gdm\(^{-1}\)?
In ethanol, the attractive forces between adjacent molecules are
Which of the following functional groups is present in alkanoic acid?
Ethanedioic acid is an organic solid that can be purified by