2019
Consider the equation below:Cr\(_2\)O\(_7 ^{2-}\) + 6Fe\(^{2+}\) + 14H\(^{+}\) \(\to\) 2Cr\(^{3+}\) + 6Fe\(^{3+}\) + 7H\(_2\)O.The oxidation number of chromium changes from
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2019 JAMB UTME Chemistry Past Questions
2019
Which of the following pairs cannot be represented with a chemical formula?
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2019
Which of the following describes the chemical property of acids?
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2019
Which of the following pollutants will lead to the depletion of ozone layer?
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2019
Which two gases can be used for the demonstration of the fountain experiment?
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2019
A radioactive nucleus has a half-life of 20 years, starting with 100,000 particles, how many particles will be left exactly at the end of 40 years
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2019
Na\(_2\)CO\(_3\) + 2HCl \(\to\) 2NaCl + H\(_2\)O + CO\(_2\)The indicator most suitable for this reaction should have a pH equal to
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2019
The molecular shape and bond angle of water are respectively
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2019
Which of the following properties increases from left to right along the period but decreases down the group in the Periodic Table?I. Atomic Number ii. Ionization energy iii. Metallic character iv. Electron affinity
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2019
At 27°C, 58.5g of sodium chloride is present in 250cm\(^3\) of a solution. The solubility of sodium chloride at this temperature is?(molar mass of sodium chloride = 111.0gmol\(^{-1}\))
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2019
What technique is suitable for separating a binary solution of potassium chloride and potassium trioxochlorate (V)?
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2019
Which of the following does not support the fact that air is a mixture?
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2019
Which of the following statements about catalyst is false?
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2019
The heat of formation of ethene, C\(_2\)H\(_4\) is 50 kJmol\(^{-1}\), and that of ethane, C\(_2\)H\(_6\) is -82kJmol\(^{-1}\). Calculate the heat evolved in the process:C\(_2\)H\(_4\) + H\(_2\) \(\to\) C\(_2\)H\(_6\)
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2019
If acidified Potassium Dichromate(VI) (K\(_2\)Cr\(_2\)O\(_7\)) acts as oxidizing agent, color changes from
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2019
Which of the following reactions is an oxidation process?
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2019
For the general equation of the natureXP + yQ ⇌ mR + nS, the expression for the equilibrium constant is
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2019
Consider the reactionA\(_{(s)}\) + 2B\(_{(g)}\) → 2C\(_{(aq)}\) + D\(_{(g)}\)What will be the effect of a decrease in pressure on the reaction?
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2019
Which of the following represents the kind of bonding present in ammonium chloride?
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2019
When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called
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