UHS Mdcat 2024 Solved With Explanation | mosaicbro.com
UHS Mdcat 2024 Solved With Explanation
Past Mdcat Paper of UHS 2024
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92
All of the following steps are used to calculate the lattice energy in Born-Haber cycle EXCEPT
Correct Answer:C
Explanation:
Delonization is not a step in the Born-Haber cycle; the cycle involves steps like atomization, ionization, and electron affinity.
93
The enthalpy change when 1 Mole of water is formed by the reaction of acid with an alkali under standard conditions is known as:
Correct Answer:D
Explanation:
The enthalpy of neutralization is the heat change when one mole of water is formed by the reaction of an acid and a base under standard conditions.
94
Which step is irrelevant with respect to balancing of redox equations by oxidation number method?
Correct Answer:A
Explanation:
Splitting the reaction into half-reactions is a step in the ion-electron method, not the oxidation number method.
95
Which of the following is NOT a correct feature of electrolytic cells?
Correct Answer:C
Explanation:
Electrolytic cells use direct current (DC), not alternating current (AC), to drive non-spontaneous reactions.
96
Which of the following has a coordinate bond?
Correct Answer:C
Explanation:
NH₃BF₃ has a coordinate bond where the lone pair of nitrogen is donated to boron.
97
Which of the following is NOT a feature of Valence Shell Electron Pair Repulsion theory?
Correct Answer:D
Explanation:
VSEPR theory considers both lone pairs and bonding pairs to determine molecular geometry.
98
Which of the following has smallest atomic radius
Correct Answer:B
Explanation:
Sulfur (S) has the smallest atomic radius among the given options due to higher effective nuclear charge in the same period.