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

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

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

4) The condition for standard enthalpy change is

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

6) 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

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

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

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

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

11) 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

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

13) The reaction proceeds through the evolution of heat

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

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

16) 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

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

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

19) The system becomes more stable if it

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

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

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

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

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

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