HSC Science (General) इयत्ता ११ वी - Maharashtra State Board Question Bank Solutions

Calculate the oxidation number of the underlined atom.

NaH₂PO₄

Justify that the following reaction is redox reaction; identify the species oxidized/reduced, which acts as an oxidant and which acts as a reductant.

\[\ce{I2_{(aq)} + 2S2O^{2-}_{3(aq)}->S4O^{2-}_{6(aq)} + 2I^-_{ (aq)}}\]

The atomic mass of \[\ce{^32_16S}\] is 31.97 u. If masses of neutron and H atom are 1.0087 u and 1.0078 u respectively. What is the mass defect?

Justify that the following reaction is redox reaction; identify the species oxidized/reduced, which acts as an oxidant and which acts as a reductant.

\[\ce{HF_{(aq)} + {OH}^-_{ (aq)}->H2O_{(l)} + {F}^ -_{ (aq)}}\]

Find the number of α and β-particles emitted in the process \[\ce{^222_86Rn -> ^214_84Po}\].

What is oxidation?

Identify the following pair of species is in its oxidized state.

Mg/Mg²⁺

Identify the following pair of species is in its oxidized state?

Cu/Cu²⁺

Identify the following pair of species is in its oxidized state?

\[\ce{O2/O^2-}\]

Identify the following pair of species is in its oxidized state?

Cl₂/Cl⁻

Justify the following reaction as a redox reaction.

\[\ce{2Na_{(s)} + S_{(s)} -> Na2S_{(s)}}\]

Find out the oxidizing and reducing agents.

Provide the stock notation for the following compound:

HAuCl₄

Provide the stock notation for the following compound:

Tl₂O

Provide the stock notation for the following compound:

FeO

Provide the stock notation for the following compound:

Fe₂O₃

Provide the stock notation for the following compound:

MnO

Provide the stock notation for the following compound:

CuO

Assign oxidation number atom in the following species.

\[\ce{Cr(OH)^Θ_4}\]

Assign oxidation number atom in the following species.

Na₂S₂O₃

Assign oxidation number atom in the following species.

H₃BO₃