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

Define the Enthalpy of sublimation.

Define the Enthalpy of vaporization.

Why work done in vacuum is zero?

Which nanoparticles act as highly effective bacterial disinfectant, removing E.Coli from water?

Name the plant which is an example of self-cleaning.

Write the name of nanomaterial which is used in water purification.

The enthalpy change for the chemical reaction \[\ce{H2O_{(s)} -> H2O_{(l)}}\] is called enthalpy of ______.

The name of metal nanoparticle which acts as highly effective bacterial disinfectant in water purification process is ______.

Write structure of adipic acid.

Draw a neat, labelled diagram of a standard hydrogen electrode (SHE).

Explain the following reaction:

Cannizzaro reaction

Write the SI unit of the cryoscopic constant.

What is the action of the following reagents on ethyl amine?

Chloroform and caustic potash

Explain the formation of [CoF₆]^3Θ complex with respect to

1. Hybridisation
2. Magnetic properties
3. Inner/outer complex
4. Geometry

Mention some important uses of the potassium permanganate salt.

At the freezing point ______.

Which innovative material has been developed using the lotus effect?

Complete the following reaction:

\[\ce{Na2SO3 + Cl2 + H2O -> \underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}}\]

Describe the bonding in the tetrahedral complex Ni(CO)₄ on the basis of valence bond theory. Give the orbital diagrams of metal atoms in free state and in the complex. Mention the number of unpaired electrons in the complex.

Define the enthalpy of freezing.