Chemistry Past Questions and Answers

Which of the following factors will speed up the rate of evolution of carbon (iv) oxide in the reaction below?<br/>2HCl + CaCO<sub style='font-size: smaller;'>3</sub> → CaCl<sub style='font-size: smaller;'>2</sub> + H<sub style='font-size: smaller;'>2</sub>O + CO<sub style='font-size: smaller;'>2</sub>

The part of the total energy of a system that accounts for the useful work done in a system is known as

How many electrons will be found in the nucleus of an atom with mass number 23 and 17 neutrons?

How many alkoxyalkanes can be obtained from the molecular formula C<sub style='font-size: smaller;'>4</sub>H<sub style='font-size: smaller;'>10</sub>O?

The cost of discharging 6.0g of a divalent metal, X from its salt is What is the cost of discharging 9.0g of a trivalent metal, Y from its salt under the same condition?<br/>[X = 63, Y = 27, 1F = 96,500C]