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

H₂O is liquid while H₂S is gas at room temperature. Explain.

Maltose is a 

(a) Polysaccharide

(b) Disaccharide

(c) Trisaccharide

(d) Monosaccharide

Enlist the properties of glucose that can not be explained on the basis of open chain structure of it

Write the environmental effects of DDT.

Write the environmental effects of DDT.

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

Write the molecular and structural formulae of thiosulfuric acid.

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.

Give balanced equations for the following reactions:

Acetic anhydride with phosphorus pentachloride.

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.