Question

Q-1[A] Choose the correct option of following question:
[10]
1 Weeds are the
a) Main crop plant b) insects and pests c) Unwanted plants d) chemical
substance
2 2,4-D is a
a) Pesticide b) Insecticide c) Fungicide
d) Weedicide
3 Vaccine from small pox is discovered by
a) Louis Pasteur b) Alexander Fleming c) Edward Jenner d) John
Mendal
4
Rhizobium bacteria present in the nodules of the roots of leguminous plant help
in:
a) Loosening of soil b) fixing atmospheric nitrogen c) humus formation
d) fixing atmospheric carbon dioxide
5 Plastics which do not remould again on heating are:
a) Thermosetting plastics b) thermoplastics c) both of these d) none of
these
6 Which fibre is used for making parachute?
a) Rayon b) nylon c) acrylic d) none of these
7 The metal which stored in kerosene:
a) Phosphorus b) Magnesium c) Sodium d) Gold
8 Which of the following is cleaner fuel?
a) CNG
b) LPG c) Coal d) Kerosene
9 Yeast is used in the production of
(i) sugar (ii) alcohol (iii) hydrochloric acid
(iii) hydrochloric acid (iv) oxygen
10 Which of the following can be beaten into thin sheets?
(a) Zinc
(b) Phosphorus (c) Sulphur (d) Oxygen​

Answer 1

Answer:

1.a,2.c,3.c,4.a,5.c,6.c,7.b,8.d,9.iii,10.c

Answer 2

Answer:

1.c)unwanted plants

2.it is herbicide

3.edward jenner