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The best indicator to use for the titration of ethanoic acid with sodium hydroxide is
An example of a crystalline substance that does not possess water of crystallization is
Which of the following gases has the lowest rate of diffusion?
[H=1.0, C=12.0, N = 14.0, O= 16.0]
Isoelectronic species have the same number of
Why are \(H_2SO_4\) and \(CaCl_2\), not suitable for drying ammonia gas? They
The reduction half equation of the following reaction is:
\(Zn_{(s)} + CuSO_{4(aq)} → ZnSO_{4(aq)} + Cu_{(s)}\)
The molecule that has a non-polar covalent bond is
Petrochemistry is an example of
Which of the following elements has its valence electrons in the s-orbital?
Which of the following statements about the collision theory is correct?
An element X has two isotopes, \(^{65}X_{30}\) and \(^{66}X_{30}\) with relative abundance of 60 % and 40% respectively. The relative atomic mass of X is
Positive ions in a sea of electrons are found in
Determine the volume of 0.100 mol of HCl in \(0.250 mol dm^3\) of solution.
Which of the statements about gases is not correct?
A compound that could be dried by using conc. tetraoxosulphate (VI) acid and not by calcium oxide is likely to be
If \(100^3\) of a saturated solution of sodium tetraoxosulphate (VI) at 30° C contains 10.5 g of the salt, what would be its solubility at this temperature? [(\(Na_2SO_4\) = 142]
The periodic property that is used to determine whether a covalent molecule is polar or not is
The gas that is less dense than air is
The primary component of natural gas
Going down group II in the periodic table normally