General Science-50

1. Two balloons are blown into spherical shape of unequal size and are connected through a narrow tube. Then what will observe?
a. The smaller balloon becomes bigger
b. The bigger balloon becomes smaller
c. The smaller becomes smaller and the bigger becomes bigger
d. There is no change in their size

2. Among the biotic components of eco-system, the producer system is :
a. Cow
b. Peacock
c. Tiger
d. Green Plants

3. If a door of running refrigerator is kept open in a closed room, what will happen to the room?
a. It cool the room
b. It will heat the room
c. It will make no difference on the average
d. It will make the temperature go up and down

4. Which of the following gases contribute to the ‘Green House Effect’?
a. Ammonia and Ozone
b. Carbon monoxide and Sulphur dioxide
c. Carbon tetraflouride and nitrous oxide
d. Carbon dioxide and methane

5. Which of the following is the most suitable ecosystem?
a. Desert
b. Mountain
c. Ocean
d. Forest

6. The common refrigerant used in domestic refrigerator is:
a. Neon
b. Oxygen
c. Nitrogen
d. Feron

7. Which of the following cannot be emitted by radioactive substances during their decay?
a. Electrons
b. Protons
c. Neutrons
d. Helium

8. Which of the following food items are rich in iron:
a. Rice
b. Apple
c. Pulses
d. Orange

9. Which of the following diseases is not transmitted by tiger mosquitoes?
a. Yellow fever
b. Dengue
c. Chikungunya
d. Japanese Encephalitis

10. The focal length of convex lens is:
a. the same for all the colors
b. shorter for blue light than for red
c. shorter for red light than for blue
d. maximum for yellow light