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

Explain formation of peptide linkage in protein with an example.

Salts of Ti⁴⁺ are colourless. Give reason.

What is the action of sodium hypoiodite on acetone?

Derive the relationship between pH and pOH.

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?