SET: 1
1. Hypermetropia can be corrected by using ……. lens.
2. The splitting of white light into different colours is called ……
3. The eyeball is nearly …… in shape.
4. During refraction of light, the character of light which does not change is …….
5. The process of adjusting focal length of eyelens is called ……
6. A good example of dispersion is ……
7. The ray passing through the ……. of the lens is not deviated.
8. All distances are measured from the …… of a convex lens.
9. ……. image cannot be captured on a screen.
10. Convex lens is also called as ……. lens.
11. An air bubble in water behaves like a …… lens.
12. The lens which can form real and virtual images is ………
13. At critical angle of incidence, the angle of refraction is …….
14. Refractive index of air increases with …….
15. The distance between the parallel incident and emergent rays in a glass slab is called ……
16. The refractive index of ice is …….
Answers : 1. biconvex 2. dispersion 3. spherical 4. frequency 5. accommodation 6. rainbow 7. optic centre 8. optic centre 9. virtual 10. converging 11. divergent 12. convex lens 13. 90° 14. density 15. lateral shift 16. 1.31.
SET: II
1. SI unit of Current is ……….
2. …….. are used to make diodes.
3. The effective resistance is less than any individual resistance when resistances are connected in ……..
4. Valence bond theory was proposed by ………
5. ………. bond has no independent existence.
6. Noble gases belong to ………. group.
7. Electrons in ………. shell are called valence electrons.
8. Lithium ………. and Potassium constitute a Dobereiner’s triad.
9. 5f elements are called ……….
10. Atomic radius is measured in ……….
11. Si and Ge are …..
12. Maximum number of electrons that an Mshell contain is/ are …..
13. Cupric chloride produces ….. colour flame.
14. s orbital is ………. in shape.
15. He atom has ….. electrons.
16. The orbitals of equal energy are called …..
Answers : 1. Ampere 2. Semiconductors 3. Parallel 4. Sidgwick & Powell 5. Π bond 6. Zero 7. outermost 8. Sodium 9. Actinides 10. Pm (Picometer) 11. Metalloids 12. 18 13. green 14. spherical 15. two 16. degenerate
SET: III
1. The functional group present in methanol is ……..
2. Fats are ……..
3. The IUPAC name of acetylene is ……..
4. Corrosion of iron occurs in the presence of …….. and ……..
5. Metals at the bottom of the activity series are often found in ……..
6. Electric charges in motion produce ……..
7. An induction stove works on the principle of ……..
8. Electric power is the product of current and …….
Answers : 1. (-OH) alcohol 2. esters of higher fatty acids 3. ethyne 4. air, water 5. free state 6. magnetic field 7. electromagnetic induction 8. emf or voltage.