Day 112: MHT-CET Chemistry

1. A.
   It arises due to an equal number of actions and anions are missing from their regular poisons in the crystal lattice.
2. B.
   It arises when an ion of an ionic compound is missing from its regular site and occupies an interstitial position.
3. C.
   After the defect density of substance decreases.
4. D.
   In this, electrical neutrality of the compound is not maintained.

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1. A.
   $\Delta_c H^0(\mathrm{C_2H_2}) = -1290\ \mathrm{kJ\ mol^{-1}}$
2. B.
   $\Delta_c H^0(\mathrm{C_2H_2}) = -645\ \mathrm{kJ\ mol^{-1}}$
3. C.
   $\Delta_c H^0(\mathrm{C_2H_2}) = -1935\ \mathrm{kJ\ mol^{-1}}$
4. D.
   $\Delta_c H^0(\mathrm{C_2H_2}) = -2580\ \mathrm{kJ\ mol^{-1}}$

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1. A.
   $\mathrm{[Co(NH_3)_5(NO_2)]^{2\oplus}}$ and $\mathrm{[Co(NH_3)_5(ONO)]^{2\oplus}}$
2. B.
   $\mathrm{[Co(NH_3)_5SO_4]Br}$ and $\mathrm{[Co(NH_3)_5Br]SO_4}$
3. C.
   $\mathrm{[Co(NH_3)_6][Cr(CN)_6]}$ and $\mathrm{[Cr(NH_3)_6][Co(CN)_6]}$
4. D.
   $\mathrm{[Cr(H_2O)_6]Cl_3}$ and $\mathrm{[Cr(H_2O)_5Cl]Cl_2 \cdot H_2O}$

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1. A.
   Increase cell potential
2. B.
   Decreases the reaction rate
3. C.
   Maintain electrical neutrality in half-cells
4. D.
   Increase the reaction rate

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1. A.
   $12.425 \times 10^{-4}\ \mathrm{mol\ L^{-1}}$
2. B.
   $3.425 \times 10^{-4}\ \mathrm{mol\ L^{-1}}$
3. C.
   $5.251 \times 10^{-4}\ \mathrm{mol\ L^{-1}}$
4. D.
   $3.425 \times 10^{-2}\ \mathrm{mol\ L^{-1}}$

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