Blog

1) The born-Haber cycle is used to determine the lattice energy of

2) Solutions containing chlorate (I) ions are used as household bleaches and disinfectants. These solutions decompose on heating as shown;
3ClO^- → ClO₃^- + 2Cl^-
Which of the following ion will have the highest oxidation state

3) Which of the following is an incorrect statement about electrolytic cell?

4) Which of the following value of standard reduction potential suggest that the rate of oxidation is equal to the rate of reduction

5) During balancing of redox equation by oxidation number method the ‘O’ and ‘H’ atoms are balanced by

6) The E°_red of an element can be calculated by comparing it with

7) The condition for standard enthalpy change is

8) If 8g of methane is burned in excess of oxygen then the standard enthalpy of combustion is

9) Which of the following is a list of metals in order from strongest to weakest reduction agents?

10) C₂O₄^2- → 2CO₂ + X e^-
The ‘X’ electrons in the above equation are

11) Consider the following reaction
MnO₂ + HCl → MnCl₂ + H₂O + Cl₂
Which atom undergoes a decrease in oxidation number?

12) The net heat change in a chemical reaction is the same whether it is brought in two or more different ways in one or several steps. It is known as

13) The amount of heat required to convert one mole of a solid directly into its vapour state at STP is called as

14) O_2(g) + 2H₂O _(l) + X e^- → 4OH^-
The “X” electrons in the above equation are

15) In an acidic medium, moles of H₂O and H⁺ are added respectively for the given reaction are
10 Cl^- + 2MnO₄^- → 2 Mn ²⁺ + 5 Cl₂

16) Which is used to measure the enthalpy of combustion?

17) Work may be defined in terms of pressure-volume as

18) The reaction proceeds through the evolution of heat

19) Which of the following is incorrect about the enthalpy of neutralization?

20) Which of the following have high reduction potential than hydrogen

21) The system becomes more stable if it

22) The dissolution of ammonium chloride in water is a/an

23) In an exothermic reaction, the heat content of the

24) In a reaction, the oxidation number of Cu decreases by 2. This indicates that Cu is

25) If the enthalpy of products is more than reactants, the value of ∆H is denoted by