Day 399: MHT-CET Chemistry

1. A.
   $-51.0$ kJ
2. B.
   $-41.0$ kJ
3. C.
   $41.0$ kJ
4. D.
   $51.0$ kJ

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1. A.
   Cisplatin is used in treatment of cancer.
2. B.
   Haemoglobin contains iron.
3. C.
   $\mathrm{Na^+}$ ions help in blood clotting.
4. D.
   Chlorophyll in a plant is a complex of $\mathrm{Mg^{2+}}$ ions.

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1. A.
   Zinc forms a protective oxide layer that covers the scratch.
2. B.
   Iron has a higher reduction potential than zinc, making iron the cathode.
3. C.
   Zinc has a lower oxidation potential than iron, acting as a sacrificial anode.
4. D.
   Electrons flow from the iron to the zinc to prevent oxidation.

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1. A.
   Hydrogen
2. B.
   Deuterium
3. C.
   Tritium
4. D.
   Deuterium and Tritium

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1. A.
   $\mathrm{As}$
2. B.
   $\mathrm{N}$
3. C.
   $\mathrm{O}$
4. D.
   $\mathrm{P}$

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