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

Observe the following and answer the question given below:

Comment on the bond length of C-X bond in it.

Observe the following and answer the question given below:

Can react by S_N1 mechanism? Justify your answer.

Arrange the halogen acids in the decreasing order of acidic strength.

Explain reactivity of halogens towards oxygen.

What are the allotropes of oxygen?

Name the nanoparticles used a catalyst in hydrogenation reaction.

Rewrite the following reaction by filling the blanks:

\[\ce{CH3 - CH - CH2 + HBr -> \underset{(major)}{\underline{}\underline{}\underline{}\underline{}} + \underset{(minor)}{\underline{}\underline{}\underline{}\underline{}}}\]

Rewrite the following reaction by filling the blanks:

\[\ce{CH3 - CH = CH2 + HBr ->[peroxide] \underset{(major)}{\underline{}\underline{}\underline{}\underline{}} + \underset{(minor)}{\underline{}\underline{}\underline{}\underline{}}}\]

Rewrite the following reaction by filling the blanks:

\[\ce{(CH3)2C = CHCH3 + HBr ->[peroxide] \underset{(major)}{\underline{}\underline{}\underline{}\underline{}} + \underset{(minor)}{\underline{}\underline{}\underline{}\underline{}}}\]

The number of octahedral sites per sphere in ccp structure is ______.

Formulate the galvanic cell in which the following reaction occurs.

2Al(S) + 3Cu²⁺(aq) → 2Al³⁺(aq) + 3Cu(S)

Derive integrated rate law for zero order reaction.

What is the effect of denaturation on the structure of proteins?

Calculate the pH of a buffer solution containing 0.1 M CH₃COOH and 0.05 M CH₃COONa. Dissociation constant of CH₃COOH is 1.8 × 10^-5 at 25°C.

Give two reactions in which acidified K₂Cr₂O₇ is used as an oxidizing agent.

A voltaic cell consisting of Fe²⁺(aq)| Fe(s) and Bi³⁺(aq)| Bi(s) electrodes is constructed. When the circuit is closed, mass of Fe electrode decreases and that of Bi electrode increases.

1. Write cell formula .
2. Which electrode is cathode and which electrode is anode?
3. Write electrode reactions and overall cell reaction.

Identify the product in the following reaction: 

Define pH.

How are the following compound obtained from alcohol?

Methanal

How are the following compound obtained from alcohol?

Propanal