The value of $$E_{cell}^0$$ is 4.315 V at 25$$^\circ$$C. If $$\Delta$$H$$^\circ$$ = $$-$$825.2 kJ mol$$-$$1, the standard entropy change $$\Delta$$S$$^\circ$$ in J K$$-$$1 is ___________. (Nearest integer) [Given : Faraday constant = 96487 C mol$$-$$1]
Answer
25
15
The molarity of the solution prepared by dissolving 6.3 g of oxalic acid (H2C2O4.2H2O) in 250 mL of water in mol L$$-$$1 is x $$\times$$ 10$$-$$2. The value of x is _____________. (Nearest integer) [Atomic mass : H : 1.0, C : 12.0, O : 16.0]
Answer
20
16
The total number of reagents from those given blow, that can convert nitrobenzene into aniline is ___________. (Integer answer)
I. Sn $$-$$ HCl
II. Sn $$-$$ NH4OH
III. Fe $$-$$ HCl
IV. Zn $$-$$ HCl
V. H2 $$-$$ Pd
VI. H2 $$-$$ Raney Nickel
Answer
5
17
For a first order reaction, the ratio of the time for 75% completion of a reaction to the time for 50% completion is ____________. (Integer answer)
Answer
2
18
The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO4.5H2O is ____________.
Answer
1
19
According to the following figure, the magnitude of the enthalpy change of the reaction
A + B $$\to$$ M + N in kJ mol$$-$$ is equal to ___________. (Integer answer)
Answer
45
20
Ge(Z = 32) in its ground state electronic configuration has x completely filled orbitals with ml = 0. The value of x is ___________.
Answer
7
21
A3B2 is a sparingly soluble salt of molar mass M (g mol$$-$$1) and solubility x g L$$-$$1. The solubility product satisfies $${K_{sp}} = a{\left( {{x \over M}} \right)^5}$$. The value of a is _____________. (Integer answer)