HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

Answer the following in one or two sentences.

For the reaction,

\[\ce{N2_{(g)} + 3H2_{(g)} -> 2NH3_{(g)}}\],

what is the relationship among `("d"["N"_2])/"dt"`, `("d"["H"_2])/"dt"` and `("d"["NH"_3])/"dt"`?

Answer the following in brief.

How instantaneous rate of reaction is determined?

Which of the following has the highest electron gain enthalpy?

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Hydrides of group 16 are weakly acidic. The correct order of acidity is ______.

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Which of the following element does not show an oxidation state of +4?

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HI acid when heated with conc. H₂SO₄ forms _______.

Which of the following occurs in a liquid state at room temperature?

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In pyrosulfuric acid oxidation state of sulfur is _______.

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Which one of the following is dimagnetic.

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Most stable oxidation state of titanium is _______.

Components of Nichrome alloy are ______.

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Most stable oxidation state of Ruthenium is _______.

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Stable oxidation states for chromiom are ________.

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Which of the following sets of ions contain only paramagnetic ions?

The correct order of increasing reactivity of C-X bond towards nucleophile in the following compounds is:

(I)

(II)

(III) (CH₃)₃ C-X

(IV) (CH₃)₂ CH-X

\[\ce{CH3 - CH = CH2 ->[HI][Peroxide]}\]

The major product of the above reaction is,

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The best method for the preparation of alkyl fluorides is _______.

Butanenitrile may be prepared by heating ______.

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Choose the compound from the following that will react fastest by S_N1 mechanism

The product ‘B’ in the above reaction sequence is,