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

Answer the following.

What is the oxidation state of ‘S’ in H₂SO₄?

Write the names and structural formulae of oxoacids of chlorine.

Answer the following.

What happens when Cl₂ reacts with F₂ in equal volume at 437 K.

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What happens when Br₂ reacts with excess of F₂.

Choose the most correct option.

Which of the following complexes exist as cis and trans isomers?

1. [Cr(NH₃)₂Cl₄]^-

^2. [Co(NH₃)₅Br]^2⊕

3. [PtCl₂Br₂]^2- (square planar)

4. [FeCl₂(NCS)₂]^2- (tetrahedral)

Answer the following in one or two sentences.

Predict whether the [Cr(en)₂(H₂O)₂]³⁺ complex is chiral. Write the structure of its enantiomer.

Answer the following in one or two sentences.

Consider the complexes \[\ce{[Cu(NH3)4][PtCl4] and [Pt(NH3)4] [CuCl4]}\]. What type of isomerism these two complexes exhibit?

Answer in brief.

What are ionization isomers ? Give an example.

Draw isomers of the following.

\[\ce{Pt(NH3)2ClNO2}\]

Answer the following question.

Draw isomers of the following

Ru(NH₃)₄Cl₂

Answer the following question.

Draw isomers of the following

[Cr(en₂)Br₂]^⊕

Answer the following question.

Draw geometric isomers and enantiomers of the following complex.

[Pt(en)₃]^4⊕

Answer the following question.

Draw geometric isomers and enantiomers of the following complex.

[Pt(en)₂ClBr]^2⊕

Give reason:

Reactions involving Grignard reagent must be carried out under anhydrous condition.

Aldehydes are more reactive towards nucleophilic addition reactions than ketones. Explain.

Choose the most correct option.

Which of the following compounds contains azo linkage?

Write a short note on coupling reactions.

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Complete the following reaction :

`"C"_6"H"_5"N"_2^+"Cl"^-` + C₂H₅OH → 

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Ridhima wants to detect the structure of the surface of materials. Name the technique she has to use.

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What do you mean by sol and gel?