Please select a subject first
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Choose the most correct option.
Pressure cooker reduces cooking time for food because _______.
Concept: undefined >> undefined
Answer the following.
How vapour pressure lowering is related to a rise in the boiling point of solution?
Concept: undefined >> undefined
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Why vapour pressure of a solvent is lowered by dissolving a nonvolatile solute into it?
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Answer the following in one sentence :
Why is KCl solution neutral to litmus?
Concept: undefined >> undefined
Answer the following in one sentence:
Why is it necessary to add H2SO4 while preparing the solution of CuSO4?
Concept: undefined >> undefined
Answer the following in brief :
The aqueous solution of sodium carbonate is alkaline whereas the aqueous solution of ammonium chloride is acidic. Explain.
Concept: undefined >> undefined
What is meant by hydrolysis?
Concept: undefined >> undefined
Answer the following :
A solution of CH3COONH4 is neutral. why?
Concept: undefined >> undefined
Choose the most correct option.
The standard potential of the cell in which the following reaction occurs:
H2 (g,1 atm) + Cu2+ (1M) → 2H+ (1M) + Cu(s),
`("E"_"Cu"^circ = 0.34 "V")` is
Concept: undefined >> undefined
Consider the half reactions with standard potentials.
- \[\ce{Ag^{\oplus}_{ (aq)} + e^{\ominus} -> Ag_{(s)}E^\circ = 0.8 V}\]
- \[\ce{I2_{(s)} + 2e^\ominus -> 2I^{\ominus}_{(aq)} E^\circ = 0.53V}\]
- \[\ce{Pb^{2\oplus}_{(aq)} + 2e^{\ominus} -> Pb_{(s)} E^\circ = -0.13 V}\]
- \[\ce{Fe^{2\oplus} + 2e^{\ominus} -> Fe_{(s)} E^\circ = -0.44 V}\]
The strongest oxidising and reducing agents respectively are ______.
Concept: undefined >> undefined
Answer the following in one or two sentences.
What is standard cell potential for the reaction
\[\ce{3Ni_{(s)} + 2Al^{3+} (1M) → 3Ni^{2+} (1M) + 2Al(s)}\], if `E_"Ni"^circ` = –0.25 V and `"E"_("Al")^circ` = –1.66 V?
Concept: undefined >> undefined
Answer the following in one or two sentences.
Write Nernst equation. What part of it represents the correction factor for nonstandard state conditions?
Concept: undefined >> undefined
Answer the following in one or two sentences.
Under what conditions the cell potential is called standard cell potential?
Concept: undefined >> undefined
Answer the following in brief.
Construct a galvanic cell from the electrodes Co3+ | Co and Mn2+/Mn. \[\ce{E{^{\circ}_{Co}}}\] = 1.82 V, \[\ce{E{^{\circ}_{Mn}}}\] = –1.18 V. Calculate \[\ce{E{^{\circ}_{cell}}}\]
Concept: undefined >> undefined
Answer the following:
Calculate emf of the cell:
Zn(s) |Zn2+ (0.2 M)||H+ (1.6 M)| H2(g, 1.8 atm)| Pt at 25 °C.
Concept: undefined >> undefined
Calculate emf of the cell at 25°C.
Zn(s) | Zn2+ (0.08 M) || Cr3+ (0.1 M) | Cr(s)
`E_(Zn)^0` = −0.76 V, `E_(Cr)^0` = −0.74 V
Concept: undefined >> undefined
Answer the following:
Predict whether the following reaction would occur spontaneously under standard state condition.
`"Ca"_(("s")) + "Cd"_(("aq"))^(2+) -> "Ca"_(("aq"))^(2+) + "Cd"_(("s"))`
Concept: undefined >> undefined
Answer the following:
Predict whether the following reaction would occur spontaneously under standard state condition.
`2"Br"_(("aq"))^(-) + "Sn"_(("aq"))^(2+) -> "Br"_(2("l")) + "Sn"_(("s"))`
Concept: undefined >> undefined
Answer the following.
What is the oxidation state of ‘S’ in H2SO4?
Concept: undefined >> undefined
Write the names and structural formulae of oxoacids of chlorine.
Concept: undefined >> undefined
