1. What is the valency of aluminium in aluminium oxide (Al₂O₃)?
2. Who introduced the concept of pH scale?
3. Solubility of most solids in water generally increases with what factor?
4. Which acid is present in soft drinks?
5. Which gas is produced in the Haber process in industries?
6. The rate of a chemical reaction increases when:
7. Which is the lightest element among the following?
8. What does atomic number represent in a neutral atom?
9. What is the monomer used to make PVC (polyvinyl chloride)?
10. In a nitrogen (N₂) molecule
11. In electroplating
12. Which of the following is a covalent compound?
13. In filtration
14. What are d-block elements commonly known as in chemistry?
15. Which of the following gases can burn easily?
16. Hydrogen gas is usually collected in laboratory by which method?
17. How many natural elements are present in nature?
18. Which of the following is an example of an endothermic reaction?
19. Which of the following compounds is ionic in nature?
20. Temporary hardness of water is mainly caused by which compound?
1. Which is a good conductor of heat?
2. The speed of light is maximum in:
3. If the net force on an object is zero, the object:
4. Light travels in:
5. What is the SI unit of force?
6. The formula for kinetic energy is:
7. A fuse is used to:
8. Sea breeze occurs during:
9. Density is defined as:
10. Potential energy is due to:
11. The SI unit of density is:
12. Which of the following is renewable?
13. Which color has the longest wavelength?
14. Electric current is measured using:
15. SONAR works on the principle of:
16. The splitting of white light is called:
17. Which energy is stored in food?
18. Which instrument measures atmospheric humidity?
19. A prism splits white light into:
20. The image formed on the retina is:
1. We called …………her shop on our way home.
2. All the articles of jewelry ……………beautifully arranged on a black velvet.
3. I will do anything but …………..the dishes.
4. She……………. wanted a house overlooking the sea.
5. Hard as they tried, they…………in their scheme.
6. He was the boy ……………..the principal had punished for coming late.
7. I'm afraid a rise in salary is …………..just now.
8. I would like to offer a small……………..to anyone who finds the missing dog.
9. After leaving school, Nigel decided to…………in the army.
10. Hardly …………asleep when the phone woke him up again.
11. Recognizing who the customer was, the manager was most apologetic and ……….. the assistant severely.
12. The boy could not find his six-pence anywhere………..get his arm out.
13. The teacher made us …………… while teaching.
14. After closing the envelope, the secretary …………….the stamps on firmly.
15. ……they were able reconstruct the fragments of the statue, they have been unable to discover her record.
16. After his girlfriend left him, George determined never………….in love again.
17. The passive voice of the sentence: I like people taking my photograph is, ……………….
18. I will keep your application …………..a file for the time being.
19. After a lot of difficulty, he …………….to open the door.
20. The Committee took just thirty minutes to……the conclusion that action was necessary.
1. Respiration releases which of the following gas?
2. Which disease is caused by bacteria?
3. Scientific name of human is
4. Which of the following is of amphibian?
5. Who is known as father of genetics?Father of Genetics
6. Cell is the basic unit of
7. Which kingdom includes bacteria?
8. The process of water loss in plants
9. What causes Malaria?
10. Human beings are
11. How many chamber does the human heart have?
12. Who discovered Blood group?
13. AIDS is caused by…….virus.
14. What is the powerhouse of cell?
15. Green pigment in plants is
16. Which gas is essential for photosynthesis?
17. Basic unit of heredity is
18. What does the Xylem transports?
19. Double fertilization occurs in
20. DNA is mainly present in:
1. 1^0 is
2. (cos11° + sin11°)/(cos11° - sin11°) is equal to
3. The matrix A = [[9,0],[0,9]] is
4. A hollow iron pipe is 21 cm long, external diameter 8 cm, thickness 1 cm, density 8 g/cm^3. The weight of the pipe is
5. Mode of the data: 15,14,19,20,14,21,20,25,14,29,30,16
6. If sinθ + Cosec θ = 2 then sin^2 θ + cosec^2 θ =
7. If |OA| = 6, |OB| = 7, OA·OB = 21, then angle AOB =
8. The median of the data: 78,56,22,34,45,54,39,68,54,84
9. lim_{x→a} (x^4 - a^4)/(x^2 - a^2) = 8. Find the value of a
10. For non-trivial solution |A| is
11. The sum of the 1st n natural number is
12. The range of the data: 25,81,20,20,22,16,6,17,15,12,30,32,10,91,8,11,20
13. lim_{x→3} (x^2-9)/(x-3) is
14. Which of the following is not invertible?
15. Which of the following numbers will completely divide (49^15 - 1)?
16. If B = { a , b, c, d, e } then the number of non-empty proper subsets of the set B is
17. A rhombus has diagonals of length 10 cm and 16 cm. Find its area.
18. Two dice are thrown. The probability that the total score is prime number is
19. Which of the following is irrational number?
20. If 60% of 3/5 of a number is 36, then the number is