HSC Science (Computer Science) ११ वीं कक्षा - Maharashtra State Board Question Bank Solutions

Choose the correct option.

Oxidation number of oxygen in superoxide is

Choose the correct option.

Which of the following halogens does always show oxidation state -1?

Choose the correct option.

The process \[\ce{SO2->S2Cl2}\] is

In which chemical reaction does carbon exhibit variation of oxidation state from - 4 to + 4? Write a balanced chemical reaction.

Give an example of mirror nuclei.

Name the most stable nuclide known.

In which reaction does nitrogen exhibit variation of oxidation state from –3 to +5?

Calculate the oxidation number of the underlined atom.

H₂SO₄

Calculate the oxidation number of the underlined atom.

HNO₃

Calculate the oxidation number of the underlined atom.

H₃PO₃

Calculate the oxidation number of the underlined atom.

K₂C₂O₄

Write pairs of isotones and one pair of mirror nuclei from the following:

\[\ce{^10_5B, ^12_6C, ^27_13Al, ^11_6C, ^28_14S}\]

Calculate the oxidation number of the underlined atom.

H₂S₄O₆

Represent graphically log₁₀ (activity/dps) versus t/s. What is its slope?

Calculate the oxidation number of the underlined atom.

Cr₂O₇²⁻

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

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

Calculate the oxidation number of the underlined atom.

NaH₂PO₄

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 \[\ce{^222_86Rn -> ^214_84Po}\].