CHEMISTRY
2 Marks Questions

1. Describe the formation of Sigma and Pi bonds duly showing orbital overlapping?2. Calculate the amount of NaOH in 250 ml of 0.5 solution of NaOH. (Molecular weight of NaOH = 40)
3. Distinguish between soap and a detergent?
4. Describe briefly cold cream and face powder mentioning their ingredients?
5. Why electrons enter into 4s orbital but not 3d orbital after filling up 3p orbital?
6. How does atomic radius vary in a period and in a group of a periodical table?
7. Calculate the number of moles of Oxalic acid present in 400ml of its 0.025 M solution
(Molecular weight of Oxalic acid is 126)
8. Why does diamond acts as bad conductor of electricity?
9. Define (a) ionization potential (b) Electron Affinity
10. Write reactions of any two elements of group II A with oxygen?
11. What is the heat of neutralization? Give an example?
12. Draw the diagram showing the structure of Benzene molecule
13. Draw the shape of water molecule
14. Calculate the number of moles NaOH present in 750 ml of 0.4 M solution (molecular
weight of NaOH is 40)
15. What is Catenation?
16. Write the electronic configuration of copper and Zinc?
17. Draw the shapes of s and p orbital?
18. The weight percentage of NaCl solution is 10. if the weight of the solution is 150
grams, calculate the weight of NaCl.
19. Why does atomic size decreases from left to right in a period?
20. Why do you add KCl and NaCl to MgCl2 during extraction of magnesium?
21. How o you test the quality of soap?
22. Draw the shapes of p orbital?
23. Write the electronic configuration of the following elements (a) Chromium (b)
Phosphorus
24. Write the chemical equations for the addition reaction of Alkenes with H2 and Cl2.
25. Mention four industrial uses of Oils?
26. Distinguish between orbit and orbital?
27. How do you perform a) Tollen’s test b) Benedict’s test for detecting sugar
28. 4 grams of NaOH is dissolved in 16.2 grams of water. Calculate the mole fractions of NaOH and
water.(Molecular weight of NaOH = 40, H2O = 18)
29. Writ down the electronic configuration of elements: a) copper b) Magnesium
30. How is glucose tested with a) Tollen’s reagent b) Benedict’s reagent
31. Sketch the structure of Paracetemol drug molecule?
32. What is the Heat of Neutralization? Give its value for a reaction between a string acid and a strong
base?
33. Draw the shape of PCL5 molecule
34. How does ionization energy vary in a period and in a group?
35. Writ the difference between Alkenes and Alkanes?
36. 15 ml of Hexane is mixed with 45 ml of Heptanes. Calculate the volume percentage of this
solution.
37. Define the following (a) Ionization energy (b) Atomic size
38. How is Benedict’s reagent prepared?
39. What is the shape of Ammonia molecule?
40. What is Polymerization?
41. What are the advantages of Hydrogenation of oil?
42. 10 g of sodium carbonate is present in 120 g of its aqueous solution. Calculate the weight percentage.
43. Write two chemical properties of acids with equations?
44. What are amino acids? Give two examples?
45. Draw the structure of ‘Asprin’ drug molecule?
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1 Marks Question (Chemistry)

1. Mention the relation between size of the atom and ionization energy?
2. Write the electronic configuration of Calcium Ca atom?
3. Give an example for each of polar and non polar solvents?
4. What is the shape of Ammonia molecule?
5. Write the meaning of Oxidation?
6. Distinguish between H + and (H +).
7. Why do shaving soap give slow dying lather?
8. What is the use of Micro Fertilizers?
9. What is Allotropy?
10. What is meant of ionic product of water?
11. Mention the atomic property on which Mandeleef’s periodic table is based?
12. Calculate the PH of 0.001 M HCl.
13. Write the equation showing the reaction of alkaline earth metals with oxygen?
14. What is the reason for adding KCl and NaCl during the electrolysis of anhydrous MgCl2?
15. Name two molecules having Pyramidal shape?
16. What is Saponification?
17. Which group of elements in a periodic table can b used as reducing reagents?
18. Write down the balanced equation showing the preparation of Zinc hydroxide from Zinc oxide?
19. What is Nodal Plane?
20. Write any two differences Acids and Bases?
21. What is Sulphitation?
22. What are Adhesives?
23. How many water molecules are present in Epsom salt?
24. Mention names of any two Chromophores?25. Explain why electron enters into 4s orbital but not 3d after filling 3p orbital