HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Chemistry

Answer the following.

What is the action of chlorine on Fe?

Solve

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

Answer the following.

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?

Answer the following.

Give two uses of HCl.

Answer the following

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

Answer the following

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 _________.

Answer in one sentence/ word.

Write the IUPAC name of alcohol having molecular formula C₄H₁₀O which is resistant towards oxidation.

Answer in one sentence/ word.

Write the name of the electrophile used in Kolbe’s Reaction.

Answer in brief.

Explain why phenol is more acidic than ethyl alcohol.

Write two points of difference between the properties of phenol and ethyl alcohol.

Give the reagents and conditions necessary to prepare phenol from Chlorobenzene.