2019 - JAMB Chemistry Past Questions and Answers - page 5
Which of the following is a physical change?
In the reaction between sodium hydroxide and tetraoxosulphate (VI) solutions, what volume of 0.5 molar sodium hydroxide would exactly neutralize 10cm\(^3\) of 1.25 molar tetraoxosulphate (vi) acid?
25cm\(^3\)
10cm\(^3\)
20cm\(^3\)
50cm\(^3\)
Sulphur exists in six forms in the solid state. This property is known as
In the reaction:
M + N → P
ΔH = +Q kJ
Which of the following would increase the concentration of the product?
A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180. Find the molecular formula.
[H = 1, C = 12, O = 16]
The IUPAC nomenclature of the compound
H\(_3\)C - CH(CH\(_3\)) - CH(CH\(_3\)) - CH\(_2\) - CH\(_3\)
Which of the following gases contains the least number of atoms at s.t.p?
1 mole of butane
4 moles of chlorine
3 moles of ozone
7 moles of argon
What mass of magnesium would be obtained by passing a current of 2 amperes for 2 hours 30 mins, through molten magnesium chloride?
[1 faraday = 96500C, Mg = 24]
Which important nitrogen-containing compound is produced in Haber's process?
Elements in the periodic table are arranged in the order of their