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

The spin only magnetic moment of Mn²⁺ ion is ______.

The product of following reaction is

\[\ce{CH3 - CH = CH - CH2 - CHO ->[i) LiAlH4][ii) H3O+]}\] ______?

Explain the dehydrohalogenation reaction of 2-chlorobutane.

Give the classification of alloys with examples.

Complete the following reaction giving major products.

\[\begin{array}{cc}
\ce{CH3}\phantom{.......}\\
|\phantom{.........}\\
\ce{CH3 - c - CH2 - Cl ->[Na/dry ether]}\\
|\phantom{.........}\\
\ce{CH3}\phantom{.......}
\end{array}\]

Complete the following reactions giving a major product.

\[\begin{array}{cc}
\ce{CH3}\phantom{................}\\
|\phantom{..................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether] A}\\
|\phantom{..................}\\
\ce{CH3}\phantom{................}
\end{array}\]

Complete the following reaction giving a major product.

\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{...................}\\
\ce{CH3 - C - CH2 - Cl->[Na/dry ether]A}\\
|\phantom{..................}\\
\ce{CH3}\phantom{................}
\end{array}\]

What two uses of the alloys.

Why dissociation of HCN is suppressed by the addition of HCL?

What is zeroth order reaction? Derive its integrated rate Law. What are the units of rate constant?

Give two reactions showing oxidising property of concentrated H₂SO_4. Write the structures of HClO₃ and HClO₄.

A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 Bar from an initial volume of 2.5L to a final volume of 4.5L The change in internal energy, ΔU of the gas will be ______.

The coordination number of cobalt in the complex [Co(en)₂Br₂]Cl₂ is ______.

Observe the following and answer the questions given below:

Name the type of halogen derivative.

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.