HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Chemistry

What happens when 

H₃PO₃ is heated ?

Write the reactions involved.

What happens when the external pressure applied becomes more than the osmotic pressure of solution?

Blood cells are isotonic with 0.9% sodium chloride solution. What happens if we place blood cells in a solution containing

(i) 1.2% sodium chloride solution?

(ii) 0.4% sodium chloride solution?

How will you distinguish between the following pair of terms?

Tetrahedral and octahedral voids

Define the term ‘enthalpy’.

What will happen to the internal energy if work is done by the system?

How is phosphine prepared using the following reagent ?
HCl

Define osmotic pressure.

What happens when glucose is treated with hydroxylamine?

How is terylene prepared?

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.