The boiling point of water is higher than the boiling point of ethanol because?
A. the bonding in water is electrovalent (ionic) whereas the bonding in ethanol is covalent B. the hydrogen bonding between water molecules is stronger than the hydrogen bonding between ethanol molecules C. water has higher lattice energy than ethanol. D. water has...
Chlorine is used in water purification because it?
A. bleaches impurities in the water B. decolorizes water C. destroys bacteria D. is extremely soluble in water E. is pleasant tasting Correct Answer: Option C – destroys bacteria
Which statement is NOT true about the composition of starch?
A. It contains only the atoms of carbon, hydrogen oxygen B. It is a polysaccharide C. Its empirical formula is C2H2O. D. It is made from the monomer C6H12O6 E. The hydrogen and oxygen atoms are in the ratio 2:1. Correct Answer: Option C – Its empirical formula...
A solution is prepared by dissolving I .96g of H2SO4 in 250 cm³ of its solution. What is the concentration in moles per dm³?
A. 0.008 B. 0.08 C. 0.1 D. 0.8 E. 8.02 Correct Answer: Option B – 0.08
In which of the following equations can Le-chartelier’s principle be applied?
A. H2(g)+S(g) → H2(g) B. 2H2S(g) + O2 (g) → 2H2O(l) + 2SO2(g) C. N2(g) +3H2(g) → NH3(g) D. NaOH(aq) +CO2(g) → Na2CO3(aq) + H2O(l) E. S(s) + O2(g) → SO2(g) Correct Answer: Option C – NaOH(aq) +CO2(g) → Na2CO3(aq) +...Products
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