Question

I. Multiple choice Questions: (1 * 10 = 10)

1. The pH of the neutral solution is

a. 5 b. 6.5 c.14 d. 7

2. The position of which element is not fixed in the periodic table

a. Hydrogen b. Calcium c. Mercury d. Fulorine

3. Modern periodic table have ____ groups

a. 10 b. 14 c. 18 d. 8

4. The energy transfer in the ecosystem happens by the help of –

a. Ecological pyramids b. Food chain

b. c. Food web d. Trophic levels

5. The instrument used to measure the current in a circuit is –

a. Voltmeter b. Ammeter c. Odometer d. None of the above

6. Which among the following is the most reactive

a. Na b. Mg c. Al d. Li

7. If we rotate the plane mirror by 20’ what will be the change in the angle of reflection

a. 20 b. 30 c. 40 d.10

8. Which of the following elements do not exhibit allotropy

a. Sodium b. Oxygen c. Sulphur d. Phosphorus

9. The following type of division takes place in most of the cells in our body

a. Mitosis b. Meiosis c. Unisexual d. Bisexual

10. Glass is a

a. Liquid b. Super cooled liquid c. Polymer d. Solid​

Answer 1

Answer:

1-d

2-a (not confirm)

4-d

5-a

6-d

Answer 2

Answer:

sorry yyyyyyyyyyyyyyyyy