When a copper wire is immersed in a solution of AgNO3, the colour of the solution becomes blue because copper:
1. Forms a soluble complex with \(AgNO_3\)
2. Is oxidised to \(Cu^{2+}\)
3. Is reduced to \(Cu^{2-}\)
4. Splits up into atomic form and dissolves
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe specific conductance of a 0.1N KCl solution at 23 is 0.012 . The resistance of cell containing the solution at the same temperature was found to be 55 . The cell constant will be
1. 0.142cm-1
2. 0.66 cm-1
3. 0.918 cm-1
4. 1.12cm-1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below are the half-cell reactions,
Mn2+ + 2e-
Mn will be:
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyE0 for Fe2+ + 2e → Fe is -0.44 volt and E0 for Zn2+ + 2e→ Zn is -0.76 volt, thus:
1. Zn is more electropositive than Fe
2. Fe is more electropositive than Zn
3. Zn is more electronegative
4. none of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe voltage of the cell given below increases due to:
Cell: Sn(s) + 2Ag+(aq) → Sn2+(aq) + 2Ag(s)
1. Increase in size of the silver rod.
2. Increase in the concentration of Sn2+ ions.
3. Increase in the concentration of Ag+ ions.
4. None of the above.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 5A current is passed through a solution of copper sulphate for 40 min. The amount of copper deposited at the cathode is
1. 40.65g
2. 0.45g
3. 3.94g
4. 65.04g
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology, the standard emf of the reaction
will be
1. 0.111V
2. 0.330V
3. 1.653V
4. 1.212V
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe standard electrode potential for Sn4+/Sn2+ couple is +0.15 V and that for the Cr3+/Cr couple is -0.74 V. These two couples in their standard state are connected to make a cell. The cell potential will be:
1. +0.89 V
2. +0.18 V
3. +1.83 V
4. +1.199 V
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf an iron rod is dipped in CuSO4 solution, then:
1. Blue colour of the solution turns red.
2. Brown layer is deposited on iron rod.
3. No change occurs in the colour of the solution.
4. None of the above.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWithout losing it's concentration, ZnCl2 solution cannot be kept in contact with :
1. Au
2. Al
3. Pb
4. Ag
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology