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The shape of s-orbitals is
An electron can be added to a halogen atom to form a halide ion with
A given volume of methane diffuses in 20s. How long will it take the same volume of sulphur (IV) oxide to diffuse under the same conditions?
[C = 12, H = 1, S = 32, O = 16
It is difficult to achieve an orderly arrangement of the molecules of a gas because they?
According to charles' law, the volume of a gas becomes zero at
What volume of gas is evolved at S.t.p if 2g of calcium trioxocarbonate (IV) is added to a solution of hydrochloric acid?
[Ca = 40, C = 12, O = 16, Cl = 35.5, H = 1 Molar volume of a gas at s.t.p = 22.4 dm\(^3\)
If a solution contains 4.9g of tetraoxosulphate (VI) acid, calculate the amount of copper (II) oxide that will react with it
[Cu = 64, O = 16, S = 32, H = 1]
A chemical reaction is always associated with
When a solid substance disappears completely as a gas on heating, the substance is said to have undergone
What is the number of moles of Na\(_H\)CO\(_3\) in 250cm\(^3\) of its solution if the solution contains 8.4 g of Na\(_H\)CO\(_3\) in 1 dm\(^3\) of the solution. [Na = 23, 0 = 16, C = 12, H = 1)
The pH of water is 7.
What is the pH of orange juice?
Which hydrocarbon does NOT exhibit structural isomerism?