ISC Class 12 Chemistry Solved Question Paper 2009

• Double the theoretical value  
• Same as the theoretical value
•  Half the theoretical value 
•  Half the theoretical value 

• Formic acid

• Acetic Acid

• Lactic Acid

• Lactic Acid

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

(paramagnetic, ethanol, diethyl ether, electron, proton, neutron, directly, Glucose, one, two depression, inversely, Fructose, Lewis acid, Lewis base, positive, ions, diamagnetic, negative, two, molecules, elevation, atoms)

(i ).................. and .................. are functional isomers.

(ii) AlCl₃ is a.................. because it is an .................. deficient molecule.

(iii) The .................. of the boiling point of a solvent by the addition of a solute is.................proportional to the molality of the solution.

(iv) The crystal of diamond is made of.................. while that of calcium chloride is made of.................... .

(v) Oxygen molecule is..................due to the presence of..................unpaired electrons

• One

• Two

• Three

• Three

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

An example of an electrophile is:

•  N0₂⁺  

• NO₂^-

• NO₂ 

• NO₃^-

• Only three sigma bonds
• Only three pi bonds
• Three sigma bonds and two pi bonds
• Three sigma bonds and two pi bonds