HSC Science (Computer Science) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Chemistry

How is phosphine prepared using the following reagent?

H₂SO₄

How is phosphine prepared using the following reagent?

Caustic soda

Which of the following 0.1 M aqueous solutions will exert the highest osmotic pressure?

Define Semipermeable membrane

Define Enthalpy of vaporization

Write the molecular and structural formulae of thiosulfuric acid.

The ligand diethylene triamine is -

(a) monodentate

(b) bidentate

(c) tridentate

(d) tetradentate

A system absorbs 6 kJ of heat and does 1.5 kJ of work on its surroundings. The change in internal energy is __________.

Define the following term:
isotonic solution

Define the following term:

Hypotonic solution

Write chemical equation for the following :
Fischer esterificatione

Fill in the blanks by choosing the appropriate word/words from those given in the brackets:  

(iodoform, acetaldehyde, positive, greater, acidic, acetone, disaccharide, negative, increases, glucose, decreases, chloroform, polysaccharide, lactose, lesser, basic, cationic hydrolysis, anionic hydrolysis)

Sucrose is a _________ and yields upon hydrolysis, a mixture of ________ and fructose.

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

For a spontaneous reaction ΔG° and E° cell will be respectively:

Give balanced equations for the following reactions:

Acetic anhydride with phosphorus pentachloride.

Write resonance structures of aniline. What is the action of benzene diazonium chloride on ethanol? 

What are the consequences of the Schottky defect in crystals?

What is an impurity defect? What are its types? Explain the formation of vacancies through aliovalent impurity with example.

Choose the most correct option.

In calculating osmotic pressure the concentration of solute is expressed in _______.

Choose the most correct option.

A living cell contains a solution which is isotonic with 0.3 M sugar solution. What osmotic pressure develops when the cell is placed in 0.1 M KCl solution at body temperature?

Choose the most correct option.

The osmotic pressure of blood is 7.65 atm at 310 K. An aqueous solution of glucose isotonic with blood has the percentage (by volume)________.