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

How will you represent first order reactions graphically.

Answer the following in brief.

Derive the integrated rate law for the first-order reaction,

\[\ce{A_{(g)} -> B_{(g)} + C_{(g)}}\] in terms of pressure.

Answer the following in brief.

What is a zeroth-order reaction?

In a first-order reaction, the concentration of the reactant decreases from 20 mmol dm⁻³ to 8 mmol dm⁻³ in 38 minutes. What is the half-life of reaction? 

Solve

The half-life of a first-order reaction is 1.7 hours. How long will it take for 20% of the reactant to react?

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What is the action of chlorine on Fe?

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A first-order reaction takes 40 minutes for 30% decomposition. Calculate its half-life.

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How is hydrogen chloride prepared from sodium chloride?

What is the action of hydrochloric acid on NH₃?

What is the action of hydrochloric acid on Na₂CO₃?

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Give two uses of HCl.

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What is the oxidation state of Manganese in `"MnO"_4^(2-)`

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What is the oxidation state of manganese in: `"MnO"_4^-`?

Choose the most correct option.

Which of the following complexes is chiral?

1. [Co(en)₂Cl₂]^⊕

2. [Pt(en)Cl₂]

3. [Cr(C₂O₄)₃]^3-

4. [Co(NH₃)₄Cl₂]^⊕

Answer the following in one or two sentences.

Is the complex [CoF₆] cationic or anionic if the oxidation state of cobalt ion is +3?

Answer in brief.

Classify the following complexes as homoleptic and heteroleptic [Cu(NH₃)₄]SO₄, [Cu(en)₂(H₂O)Cl]^2⊕, [Fe(H₂O)₅ (NCS)]^2⊕, tetraammine zinc (II) nitrate.

Answer the following question.

What are cationic, anionic, and neutral complexes? Give one example of each.

Give reason:

Alkyl halides though polar are immiscible with water.

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Which is the most resistant alcohol towards oxidation reaction among the following?

Answer in one sentence/ word.

Hydroboration-oxidation of propene gives _________.