Three electrolytic cells A, B, C containing solutions of ZnSO4, AgNO3, and CuSO4, respectively are connected in series. A steady current of 1.5 amperes was passed through them until 1.45 g of silver was deposited at the cathode of cell B. The current flow time is-
1. 14 minutes
2. 25 minutes
3. 20 minutes
4. 11 minutes
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of Faradays required to produce 20.0 g of Ca from molten CaCl2 is-
1. 2F
2. 1F
3. 4F
4. 3F
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe amount of charge required for the reduction of 1 mol of to is -
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe resistance of a cell containing 0.001 M KCl solution at 298 K is 1500 Ω. The conductivity is 0.146 × 10–3 S cm–1. The cell constant would be-
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe conductivity of 0.00241 M acetic acid is 7.896 × 10–5 S cm–1. If for acetic acid is 390.5 S cm2 mol–1, the dissociation constant will be -
\(1. \ 2.45 \times 10^{-5} \mathrm{~mol} \ \mathrm{~L}^{-1} \\
2. \ 1.86 \times 10^{-5} \mathrm{~mol} \ \mathrm{L^{-1}} \\
3. \ 3.72 \times 10^{-5}\mathrm{~mol} \mathrm{~L^{-1}} \\
4. \ 2.12 \times 10^{-5}\mathrm{~mol} \mathrm{~L^{-1}}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe correct increasing order of reducing power of the metals is:
K+/K = –2.93 V |
Ag+/Ag = 0.80 V |
Hg2+/Hg = 0.79 V |
Mg2+/Mg = –2.37 V |
Cr3+/Cr = – 0.74 V |
1. Cr < Mg < K < Ag < Hg
2. Mg < K < Ag < Hg < Cr
3. K < Ag < Hg < Cr < Mg
4. Ag < Hg < Cr < Mg < K
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe correct statement about the given galvanic cell equation is -
Zn(s) + 2Ag+(aq) → Zn2+(aq) + 2Ag(s)
1. | The current will flow from silver to zinc in the external circuit. |
2. | The current will flow from zinc to silver in the external circuit. |
3. | The current will flow from silver to zinc in the internal circuit. |
4. | The current will flow from zinc to silver in the internal circuit. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology2Cr(s) + 3Cd2+(aq) → 2Cr3+(aq) + 3Cd
;
The value of in the above reaction will be -
1. -196.83 kJ
2. 196.83 kJ
3. 186.83 kJ
4. -186.83 kJ
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe incorrect statement(s) among the below is/are:
a. | The unit of conductivity is S cm-2 |
b. | Specific Conductivity of weak and strong electrolytes always decreases with a decrease in concentration. |
c. | The unit of molar conductivity is S cm2 mol-1 |
d. | Molar conductivity increases with an increase in concentration. |
1. a
2. a and d
3. b and d
4. a and c
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe conductivity of 0.20 M solution of KCl at 298 K is 0.0248 S cm–1. The molar conductivity will be -
1. 124 S cm2 mol-1
2. 134 S cm2 mol-1
3. 128 S cm2 mol-1
4. 136 S cm2 mol-1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology