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which of the following polymers is suitable for packaging and electrical insulation?
The most important use of hydrogen is in the
The boiling of fat and aqueous caustic soda is referred to as
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into
Ordinary glass is manufactured from silica, CaCO3 and
Which of these pairs are synthetic and natural macromolecules respectively?
The number of isomers formed by C\(_6\)H\(_{14}\) is
The reaction of an alkene with hydrogen in the presence of catalyst is
An example of element that can catenate is
Which of the following gives a precipitate when treated with NaOH solution?
Ethanol can easily be produced by
The gas that gives brown colouration in brown ring test is
Steam changes the colour of anhydrous cobalt (II) chloride from
The property which makes alcohol soluble in water is the
The furring of kettles is caused by the presence in the water of?
The substance least considered as a source of environmental pollution is
25cm\(^3\) of a 0.2 mol dm\(^3\) solution of Na\(_2\)CO\(_3\) requires 20 cm\(^3\) of a solution of HCl for neutralization. The concentration of the HCl solution is
Three drops of a 1.0 mol dm-3 solution of NaOH are added to 20 cm3 of a solution of pH 8.4. The pH of the resulting solution will?
When a salt loses its water of crystallization to the atmosphere on exposure, the process is said to be
Tetraoxosulphate (VI) acid burns the skin by