Q.1
The following equation shows the reaction between Ag+Ag^+Ag+ and Cl−Cl^-Cl− ions. Ag+Ag^+Ag+ + Cl−Cl^-Cl− -> AgCl Δ H= -kJmol−1kJmol^{-1}kJmol−Which of the following is true about the above equation?
  • Exothermic reaction occurs
  • Heat is absorbed from the surrounding
  • The energy content of the reactants is less than the products
  • 65 kJ of heat is absorbed when 1 mole of silver chloride is formed
Q.2
When AgNO3AgNO_3AgNOreacts with NaCl solution, the temperature changed by x $\degree$ C. Which of the following solution is suitable to be use to replace NaCl and will give the same amount of temperature change?
  • lead (II) nitrate
  • lead (II) chloride
  • Potassium chloride
  • Potassium nitrate
Q.3
The reaction between 25.0 cm3 of hydrochloric acid and 25.0 cm3 of sodium hydroxide solution releases the heat ofJ.What is the temperature change of the mixture?[Specific heat capacity of a solution = 4-2 Jg ^C"1;Assume that 1 cm3 of a solution is equal to 1 g of the solution]
  • 1°C
  • 2°C
  • 10 °C
  • 20 °C
0 h : 0 m : 1 s