Question Papers

Test paper - 1

Section - A (1 mark each)

Q1 Define common ion effect. 

or 

Out of FeCl3 and HNO3 which will get hydrolyzed? What will be the nature of solution?

Q2 Define solubility product.

Q3 Define atomic mass unit 

or

State modern periodic law.

Q4 What are isotopes?

Q5 Define bond enthalpy.

Section - B (2 marks each)

Q6 How many significant figures are present in 0.0025 and 2500?

or 

Define aqueous tension.

Q7. What is the calorific value?

or 

Calculate the pH of 10-18 M HCl solution.

Q8 Give two applications of Hess's Law.

Q9 Give two points of difference between s and p block elements.

Q10 Write four important properties of cathode rays. 

Q11 Calculate the no. of molecules present in 2.5 moles of water. 

Q12 Give the geometry of XeO3 and BrF5

Section - C (3 marks each)

Q13 What is buffer capacity? Give the Henderson-Hasselbalch equation for acidic buffer.

Q14 pH of a solution is 6.8. Calculate H+ and OH- ion in the solution.

Q15 Explain Huckel's rule of aromaticity with suitable examples.

Q16 Write the mechanism of sulphonation of benzene. 

Q17 Give the composition of each of the the following: Limestone, slaked lime and washing soda. 

Q18 Give three postulates of VSEPR Theory.

Q19 In a process, 764J of heat is absorbed by a system and 269J of work is done by the system. What is the change in internal energy for the process?

or

Define state function. Give examples.

Q20. Give limitations of octet rule. 

or

Mention 2 anomalous properties of carbon. 

Q21 (a) Write a note on green chemistry

(b) What is photochemical smog? Give example.

(c) Give an example for secondary pollutant.

Q22 (a) Define pH. A 0.002 M solution of pyridinium hydrochloride has pH = 3.44.

(b) Calculate the ionisation constant of pyridine. 

or

Give oxidation no. of (i) S in H2SO3 (ii) Cr in CrO5 (iii) N in NO3-

Q23. Give three uses of borax.

Q24. Give three differences between Classical Smog and Photochemical Smog.

Section D ( 5 marks each)

Q25 State Markonikov rule. Give the mechanism of addition of HBr to propene.

or

(a) Define geometrical isomers. Write geometrical isomers of CHBr=CHBr.

(b) Classify the following substituents as ortho, meta and para directing groups -NO2, -OCH3, -OCOCH3, -CN.

Q26 (a) Describe the structure of diborane. 

(b) Convert the following in basic units: 35.6 pm and 34567 mg

or 

Account for the following: 

(a) conc. HNO3 can be stored in aluminum containers.

(b) orthoboric acid is monobasic acid. 

(c) CO2 is gas, SiO2 is solid.

(c) Graphite is used as lubricant.

(d) Borazine is more reactive than benzene.