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

The value of Δ U is ______ when 2 kJ of heat is released and 6 kJ of work is done on the system.

The mole fraction of the solute molal aqueous solution is:

What is the colour of Cu⁺ ion?

How much vacant space is present in hep crystal lattice?

What is zero order reaction?

Define pH.

Derive relationship between pH and pOH.

Write the reaction of Acetyl chloride on triethylamine.

Discuss the mechanism of alkaline hydrolysis of methyl bromide.

Write two uses of ether

Write two uses of salt bridge.

Convert Methyl iodide to methyl isocyanide

Complete the following reaction giving major product.

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

Define pOH.

The spin only magnetic moment of Cr³⁺ cation is ______.

The product of the following reaction is

\[\begin{array}{cc}
\ce{O}\phantom{.........}\\
||\phantom{.........}\\
\ce{C2H5 - C - CH3 ->[H2/Ni][\Delta] \phantom{..}?}\end{array}\]

Calculate effective atomic number of \[\ce{[Co(NH3)6]^3+}\] ion.

What is the action of following on ethyl bromide?

alcoholic sodium hydroxide

Write a classification of proteins with an example.

If unit of rate constant is mol dm⁻³s⁻¹, the order of reaction would be ______.