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

Write chemical equation for the following:
Gatterman - Koch formylation

Write chemical equation for the following:
Gatterman - Koch formylation

How is potassium dichromate prepared from chrome iron ore?

What is the role of the following compound- 
SiO₂ in the extraction of copper from copper pyrites?

Write chemical equation for the following :
Rosenmund reduction

Write chemical equation for the following :
Rosenmund reduction

How will you convert calcium acetate to acetaldehyde?

How will you convert calcium acetate to acetaldehyde?

Complete the following statement by selecting the correct alternative from the choices given: 

In a face-centered cubic lattice, atom (A) occupies the comer positions and atom (B) occupies the face centre positions. If one atom of (B) is missing from one of the face-centered points, the formula of the compound is:

How much quantity of electricity in coulomb is required to deposit 1.346 × 10^-3 kg of Ag in 3.5 minutes from AgNO₃ solution?
( Given: Molar mass of Ag is 108 × 10^-3 kg mol^-1 )

Which of the following compounds of chlorine is used as refrigerant? 

What is the action of lithium aluminum hydride in the presence of ether on the following compounds? 
a. Nitroethane 
b. 2-Methyl-1-nitropropane

What is the action of following reagents on glucose?
1. Bromine water
2. Hydroxylamine

The functional group present in triacylglycerol is _______.

Give reasons for the following:

The transition metals generally form coloured compounds.

What is the effect of temperature on solubility of solids in water? Give examples.

Answer the following in one or two sentences.

Comment on the statement:

no work is involved in an expansion of gas in a vacuum.

Answer in brief.

Derive the expression for PV work.

Answer the following question.

One mole of an ideal gas is compressed from 500 cm³ against a constant pressure of 1.2 × 10⁵ Pa. The work involved in the process is 36.0 J. Calculate the final volume.

Answer the following question.

Calculate the work done during the synthesis of NH₃ in which volume changes from 8.0 dm³ to 4.0 dm3 at a constant external pressure of 43 bar. In what direction the work-energy flows?