Question

PHYSICAL SCIENCE
5
5
[ Answer the questions neatly. Write the answer in serial wise. write only
the answers of objective questions with correct numberings]
Class:
Time: 2 hr 15 min
Full marks: 50
5
S
6. A
C
1.
Choose the correct options:
1x5
1.1. Troposphere ranges from ...14 to 56km / 0 to 12km / 90 to
500km / 56 to 90 km
1.2. One of the ozone depleting gas is... NO/N,O / CO2 / CFC
1.3. Which of the following has highest calorific value. wood / L.P.G.
/ Coal / Diesel
1.4. The source of energy on the sun is..... nuclear fusion / nuclear
fission/ chemical reaction / photoelectric effect
1.5. The constant in Boyle's law are ... Mass & temperature / mass
& pressure / Pressure only / mass only.
2. Write True / False:
1x5
2.1. Nitrogen is a greenhouse gas
2.2. Source of CFC is automobiles is automobiles.
2.3. The value of absolute zero is 273°K
? 4 rocan min
7.​

Answer 1

Answer:

OMG!!!!! SUCH A BIG BIG QUESTION..............

Answer 2

Answer:

Explanation:

1.1.b

2. cfcs

3.diesel

4.nucleur fusion

5. idk

2 part

1. true

2.true

3. true