HSC Science (Electronics) 11th Standard - Maharashtra State Board Question Bank Solutions

What do you understand by the term filtrate?

Why is paper moistened before filtration?

State octet rule.

Define adsorption.

Why students can read blackboard written by chalks?

Aqueous solution of raw sugar, when passed over beds of animal charcoal, becomes colourless. Explain.

Explain that adsorption is a surface phenomenon.

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Oxidation numbers of Cl atoms marked as Cl^a and Cl^b in CaOCl₂ (bleaching powder) are

\[\begin{array}{cc} \ce{Cl^{{a}}}\phantom{.} \\/\phantom{...} \\ \ce{Ca}\phantom{......} \\ \backslash\phantom{..} \\\phantom{........} \ce{O-Cl^{{b}}}\phantom{.} \end{array}\]

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A compound contains atoms of three elements A, B, and C. If the oxidation state of A is +2, B is +5 and that of C is -2, the compound is possibly represented by

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The coefficients p, q, r, s in the reaction \[\ce{{p}Cr2O7^{2Θ} + {q}Fe^{2⊕}->{r}Cr^{3⊕} + {s}Fe^{3⊕} + H2O}\] respectively are:

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Oxidation number of carbon in H₂CO₃ is

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Which is the correct stock notation for manganese dioxide?

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Oxidation number of oxygen in superoxide is

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

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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