HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Chemistry

Consider the half reactions with standard potentials.

1. \[\ce{Ag^{\oplus}_{ (aq)} + e^{\ominus} -> Ag_{(s)}E^\circ = 0.8 V}\] 
2. \[\ce{I2_{(s)} + 2e^\ominus -> 2I^{\ominus}_{(aq)} E^\circ = 0.53V}\]
3. \[\ce{Pb^{2\oplus}_{(aq)} + 2e^{\ominus} -> Pb_{(s)} E^\circ = -0.13 V}\]
4. \[\ce{Fe^{2\oplus} + 2e^{\ominus} -> Fe_{(s)} E^\circ = -0.44 V}\]

The strongest oxidising  and reducing agents respectively are ______.

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?

Answer the following in one or two sentences.

Write Nernst equation. What part of it represents the correction factor for nonstandard state conditions?

Answer the following in one or two sentences.

Under what conditions the cell potential is called standard cell potential?

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 \[\ce{E{^{\circ}_{cell}}}\]

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.

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

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"))`

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"))`

Answer the following.

What is the oxidation state of ‘S’ in H₂SO₄?

Write the names and structural formulae of oxoacids of chlorine.

Answer the following.

What happens when Cl₂ reacts with F₂ in equal volume at 437 K.

Answer the following.

What happens when Br₂ reacts with excess of F₂.

Choose the most correct option.

Which of the following complexes exist as cis and trans isomers?

1. [Cr(NH₃)₂Cl₄]^-

^2. [Co(NH₃)₅Br]^2⊕

3. [PtCl₂Br₂]^2- (square planar)

4. [FeCl₂(NCS)₂]^2- (tetrahedral)

Answer the following in one or two sentences.

Predict whether the [Cr(en)₂(H₂O)₂]³⁺ complex is chiral. Write the structure of its enantiomer.

Answer the following in one or two sentences.

Consider the complexes \[\ce{[Cu(NH3)4][PtCl4] and [Pt(NH3)4] [CuCl4]}\]. What type of isomerism these two complexes exhibit?

Answer in brief.

What are ionization isomers ? Give an example.

Draw isomers of the following.

\[\ce{Pt(NH3)2ClNO2}\]

Answer the following question.

Draw isomers of the following

Ru(NH₃)₄Cl₂

Answer the following question.

Draw isomers of the following

[Cr(en₂)Br₂]^⊕