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

Calculate spin only magnetic moment of divalent cation of transition metal with atomic number 25.

Neutral solutions have the pH of ______.

Presence of disulphide link gives rise to which structure of protein?

Aluminium crystallises in a cubic close-packed structure with a unit cell edge length of 353.6 pm. What is the radius of Al atom? How many unit cells are there in 1.00 cm³ of Al?

Convert the following.

p-Nitrochlorobenzene to p-nitrophenol

The pH of a weak monoacidic base is 11.2, and its OH^– ion concentration is ______.

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.