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1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
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5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
6. Take photo of all the Sheets and make single pdf file.
1
___________________ are the chemical substance sused for killing or destroying insects or other organisms harmful to cultivated plants or to animals.
Pesticides
Bleaching Powder
Fertilizers
All of these.
2
The temperature at which condensation takes place is called the _________________________.
Boiling point
Melting point
Dew point
None of these.
3
_________________ decompose the organic matter and break it in to simpler form.
Microbes
Bacteria
Virus
4
_________________ trapped within the soil is available to the roots of plants.
Carbon
Sun light
Water
All of these
5
Soil deficient in nutrients is said to be _______________________.
Fertile
Infertile
Both (a) and (b) are correct.
6
Soil rich in nutrients is said to be _____________________.
Feritile
7
The part of the environment which contains _________________ in all its various forms is called the hydrosphere.
Hydrogen
Soil
8
_______________ gives mechanical support or anchorage to plants.
Air
9
Growing the same crop in the same soil repeatedly for years is known as ___________________.
Apiculture
Monoculture
Pisciculture
10
Which of the following are correct :
(a) Pesticides cause human problems like headache, nausea, allergies and even cancer and other reproductive diseases.
(b) Continuous use of pesticides also decreases the soil fertility and kill the useful microbes present in the soil.
Only (a) is correct.
Only (b) is correct.
11
(a) The part of the environment which contains water in all its various forms is called the hydrosphere.
(b) The frozen part of the hydrosphere has its own name, the cryosphere.
12
(a) Gases and particulate matter released during volcanic eruptions is one source of air pollution.
(b) Smoke and ash from forest fires, fog, dust blown by strong winds, pollen, volcanic eruption are natural air pollutants.
13
(a) The substances that contaminate or pollute water are called water pollutants.
(b) Waste water released from factories contains several harmful chemicals.
14
(a) Pesticides cause human problems like headache, nausea, allergies, etc.
(b) Pesticides are normally used to prevent crop diseases.
(c) Most of the pesticides are non biodegradable.
Only (a) and (b) are correct.
Only (b) and (c) are correct.
Only (a) and (c) are correct.
15
(a) During the night, both the land and the sea start cooling.
(b) During the night, the cooling of sea takes place at a slower rate than that of the land.
(c) The air then moves from the land to the sea, is called land breeze.