Chemistry Past Questions and Answers

If 60 cm<sup style='font-size: smaller;'>3</sup> of gas is heated from 27<sup style='font-size: smaller;'>o</sup>C TO 50<sup style='font-size: smaller;'>o</sup>C, what is the new volume of the gas at constant pressure?

Consider the cell represented below: Zn/Zn<sup style='font-size: smaller;'>2+</sup><sub style='font-size: smaller;'>(aq)</sub> // Cu<sup style='font-size: smaller;'>2+</sup><sub style='font-size: smaller;'>(aq)</sub> / Cu<sub style='font-size: smaller;'>(s)</sub>. Which of the following statements is correct about the cell

When ammonium trioxocarbonate (IV) solution is added to separate solutions of calcium, zinc and sodium salt precipitate could be formed in the case of

The condensation of several amino acid molecules gives

Which of the following statements is true of an endothermic reaction? I. Heat is absorbed from the surrounding II. The heat content of the products is more than that of the reactants III. The enthalpy change is positive IV. The surrounding is at a lower temperature than the system.