Question

14 Write the main chemicals that destroys the ozone year
air pollution
15 Witch layer of the atmosphere is called
protective layer?
onosphere and
Group-В
13*2-26
CA
16. Palpa lies in high altitude that Dang from a sea level then where
does an object has more weight among two places? Give
reason.
17. Differentiate between nuclear fission and nuclear fusion
18. A hydraulic automobile lift is designed to lift cars with a
maximum mass of 3ookg. The area of cross section of the piston
carrying the load is 425cm?. what maximum pressure would be
the smaller piston have to bear?
19. Mercury thermometer is used to measure higher temperature
but alcohol thermometer is used to measure lower
temperature. why? Give reason.
20. When current carrying conductor is placed inside the magnetic
field of a magnet, motor effect is observed, why?
21. What is function of catalyst? Give an example of a positive and
negative catalyst.
22. Why HCl called an acid? Write the name of the neutral
substance which are formed by the reaction of this acid with
NaoH.
23. Write two properties of aluminum that make it suitable for
making body parts of an aeroplane,
24. Write the name of the given compound and identify whether
they are saturated or unsatured.
HH H
H-C=C-H
H-C-C-CM
HH
25. In which time does the nuptial flight occur in the life cycle of
honey bee? Why does it happen?​

Answer 1

Answer:

cheers

Explanation:

the same to you and your family and friends is

Answer 2

17 in the case of nuclear fission an atom divides into two or smaller or lighter atoms nuclear fusion occurs two or more atoms join on fuse together to form a large or heavy atom