Fertilisers and Pesticides

Q.

What are the advantages and disadvantages of pesticides?

Q.

What are the control measures taken in the case of tikka disease of the groundnut?

Q. Nitrosomonas, Nitrococcus and Nitrobacter are involved in the process of

1. Nitrate assimilation
2. Denitrification
3. Nitrification
4. Ammonification

Q.

What microbes are used as biopesticides?

Q.

What is DDT and is it biodegradable or non-biodegradable?

Q. Which organism is used for the biocontrol of aphids?

1. Dragonfly
2. Ladybird
3. Caterpillar
4. Trichoderma
   

Q.

How do butterflies contribute to the environmental balance?

Q. The image given below represents the biomagnification of DDT in an aquatic food chain. Identify ‘A’ and ‘B’.

1. A - Large fish (DDT 2 ppm), B - Water (0.003 ppb)
2. A - Large fish (DDT 10 ppm), B - Water (0.004 ppm)
3. A - Large fish (DDT 2 ppm), B - Water (0.003 ppm)
4. A - Large fish (DDT 10 ppm), B - Water (0.004 ppb)

Q. Modern detergents contain enzyme preparations of

1. Thermoacidophiles
2. Thermophiles
3. Alkaliphiles
4. Acidophiles

Q.

Give information about the reasons for avoiding the use of Chemical Pesticide.

Q.

Which of the following is a biodegradable pollutant?

1. DDT

2. Mercury salts

3. Aluminium foil

4. Domestic waste

Q. Match column I with column II and select the correct option regarding biomagnification of DDT in an aquatic food chain.

Column I (Organism from aquatic food chain)	Column II (Level of DDT in the body)
I. Small fish	P. 25 ppm
II. Fish-eating birds	Q. 2 ppm
III. Zooplankton	R. 0.5 ppm
IV. Large fish	S. 0.04 ppm

1. I - S, II - Q, III - R, IV - P
2. I - R, II - S, III - Q, IV - P
3. I - R, II - P, III - S, IV - Q
4. I - S, II - R, III - P, IV - Q

Q. The full form of DDT is _________.

Q. With the help of a flow-chart exhibit the events of eutrophication. [3]

Q.

Lichens are sensitive to_______.

1. Air pollution

2. Noise pollution

3. Water pollution

4. Nuclear pollution

Q. An insect repellent neem product is

1. Rotenone
2. Azadirachtin
3. Parathion
4. Endrin

Q.

First commercial pesticide was

1. DDT

2. 2, 4-D

3. Burgandy mixture

4. Bordeaux mixture

Q.

How does insecticide kill?

Q. Which chemical compound in Neem is an insect repellent?

1. Azadirachtin
2. Rotenone
3. Parathione
4. Endrin

Q. Which of the following is used as bio-insecticide?

1. Bacillus polymyxa
2. Cylindrospermum licheniforme
3. Phytophthora palmivora
4. Chrysanthemum cinerarifolium

Q. Match the following list of bacteria and their commercially important products:

Bacterium	Bacterium Product
A. Aspergillus niger	i. Lactic acid
B. Acetobacter aceti	ii. Butyric acid
C. Clostridium butylicum	iii. Acetic acid
D. Lactobacillus	iv. Citric acid

1. A-ii, B-iii, C-iv, D-i
2. A-iv, B-i, C-iii, D-ii
3. A-iv, B-iii, C-ii, D-i
4. A-ii, B-iv, C-iii, D-i

Q.

1. Name the following

(e) Bacteria that helps to produce vinegar.

Q. Which of the following is/are correct with respect to Green Revolution?

1. It led to a large increase in crop production in developing countries
2. Synthetic fertilisers and pesticides release certain harmful compounds into the soil, air and underground water
3. All of these
4. Increase in yield of crops was achieved by the use of artificial fertilisers, pesticides, and high-yield crop varieties

Q.

Are agrochemicals bad?

Q. What are biopesticides? Why are they preferred over chemical pesticides? Describe the mechanism of biopesticides for controlling pests.

Q. Rachel Carson's famous book 'silent spring' is related to

1. Ecosystem management
2. Pesticide pollution
3. Noise pollution
4. Population explosion

Q. DDT is a/an

1. Carbamate
2. Organophosphate
3. Organochlorine
4. Triazine

Q. The pesticide used as preventive measure in buildings is

1. Aldrin
2. Dieldrin
3. Endrin
4. DDT

Q.

What is intercropping?

Q. Narendra spread over dose of pesticides on this cotton crop. Ramesh says it is a hazard to bio diversity and crop yield. Can you support Ramesh? How?