it is wrong, give × in the parentheses. Ih the parentheses; Actual Full Marks 10

Question

it is wrong, give × in the parentheses. Ih the parentheses; Actual Full Marks 10 10 marks, 1 mark for each) Marks At 298K, Standard enthalpy of formation (AH) of O2 (g) is zero. roducts in the forward reaction. It is possible that two electrons of an atom can have the same set of 4 quantum numbers. The equilibrium constant of.a certain reaction is temperature independent. All the molecules obey the Octet rule. The sum of the oxidation numbers of all atoms in PO is-3. The volume of water is 7.10cm3, the last digit, 0, is estimated. The change of entropy of a system only depends on the initial and final MnO4 can only acts as oxidizing agent because Mn has the highest ON. state. ) the periodic table, fluorine (F) atom has the largest electronegativity. Choose a right answer and tick the corresponding Full Marks 1 er (10 marks, 1 mark for each) Actual Marks

Explanation / Answer

At 298 K, standard enthalpy of formation of O2 is zero.   (Correct)

Catalyst can increase the equilibrium concentration of products in forward direction.    (Wrong)

(Positive catalyst increases the rate of forward reaction, but negative catalyst increases the rate of backward reaction)

It is possible that two electrons can have the same set of four quantum numbers. (Wrong)

(According to Pauli's exclusion principle, no two electrons can have all the four quantum numbers identical)

The equilibrium constant of a reaction is temperature indepenedent.    ( Wrong)

All molecules obey the octet rule    (Wrong)

Sum of oxidation numbers of all atoms in PO4-3 is -3.              (Correct)

(overall charge depicts the sum of oxidation numbers of all atoms)

The volume of water is 7.10 cm3 , the last digit 0 is estimated   ( Wrong)

The change of entropy of a system depends only on initial and final state    ( Correct)

(Entropy is a state function and change of entropy does not depend on path)

MnO4- acts as an oxidising agent because Mn has the highest ON    (Correct)

(The oxidation number of Mn in MnO4- is +7 which is the highest ON for Mn. For the reason, MnO4- can act as oxidising agent only)

In the periodic table, fluorine (F) has the highest electronegativity    (Correct)

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