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question_answer1)
Manisha took some vinegar in a test tube and added some baking powder to it. Then she lit a matchstick and brought it near the mouth of the test tube. The flame of matchstick got extinguished.
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Which of the following is correct conclusion regarding the given experiment?
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A)
Carbon dioxide gas does not support burning. done
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B)
Air contains carbon dioxide. done
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C)
Oxygen gas present in the air is necessary for burning. done
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D)
Oxygen gas can extinguish fire. done
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question_answer2)
Read the following statements.
(i) Air dissolved in water cannot be removed from it. |
(ii) Density of air decreases with increasing altitude. |
(iii) Air is an element that surrounds the Earth and makes it hospitable for living organisms. |
(iv) Air helps in pollination of several flowers and in the dispersal of seeds. |
Which of the above statements are correct?
A)
(i) and (ii) only done
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B)
(ii) and (iv) only done
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C)
(i) and (iii) only done
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D)
(iii) and (iv) only done
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question_answer3)
Three burning candles are covered with glass jars as shown in figures. Equal amount of air, \[C{{O}_{2}}\] and \[{{O}_{2}}\] are present in jars X, Y and Z, respectively. Arrange the candles in decreasing order of the time for which they will continue to burn.
A)
Z, X, Y done
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B)
X, Y, Z done
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C)
X, Z, Y done
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D)
Z, Y, X done
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question_answer4)
Which of the following actions will help in reducing pollution?
(i) Using induction cooker instead of LPG stove for cooking food. |
(ii) Using unleaded petrol in cars |
(iii) Spraying pesticides on plants to kill pests |
(iv) Carrying cotton or jute bags for shopping instead of polybags |
A)
(i) and (ii) only done
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B)
(iii) and (iv) only done
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C)
(i), (ii) and (iii) only done
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D)
(i), (ii) and (iv) only done
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question_answer5)
Read the given statements and select the correct option.
Statement 1: The level of groundwater below the surface of Earth at a given place is known as the water table. |
Statement 2: Extensive use of groundwater in cities for domestic and industrial purposes is resulting in lowering of water table. |
A)
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done
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B)
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done
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C)
Statement 1 is true but statement 2 is false. done
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D)
Both statements 1 and 2 are false. done
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question_answer6)
Match column I with column II and select the correct option from the codes given below.
Column I | Column II |
(a) Floods | (i) Aquifers |
(b) Groundwater | (ii) Salt water |
(c) Ocean | (iii) Rain |
(d) Precipitation | (iv) Dirt and water vapour |
(e) Clouds | (v) Excess rain |
A)
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv), (e)-(v) done
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B)
(a)-(v), (b)-(i), (c)-(ii), (d)-(iii), (e)-(iv) done
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C)
(a)-(i), (b)-(v), (c)-(iii), (d)-(ii), (e)-(iv) done
clear
D)
(a)-(v), (b)-(i), (c)-(iii), (d)-(ii), (e)-(iv) done
clear
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question_answer7)
Which of the following statements are true about acid rain?
(i) Acid rain has harmful effects on the living beings. |
(ii) Acid rain mainly comprises of \[{{H}_{2}}S{{O}_{4}}\] and \[HN{{O}_{3}}\]. |
(iii) Greenhouse gases are mainly responsible for causing acid rain. |
(iv) Acid rain causes damage to buildings. |
A)
(i) and (ii) only done
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B)
(i) and (iii) only done
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C)
(i), (iii) and (iv) only done
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D)
(i), (ii) and (iv) only done
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question_answer8)
Four identical wet towels were hung out on clothesline in different manner to dry under different conditions.
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Arrange them in order, beginning with the towel that would take the shortest time to dry.
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A)
P, Q, R, S done
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B)
P, R, Q, S done
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C)
R, P, Q, S done
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D)
S, Q, R, P done
clear
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question_answer9)
Study the following experiment.
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What could be inferred from the above experiment?
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A)
Air contains dust particles. done
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B)
Air does not have fixed volume. done
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C)
Air has mass. done
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D)
Air is colorless. done
clear
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question_answer10)
The gas X is only about 20 parts out of 10 parts of air in the atmosphere. It is needed for decomposition of organic matter. The gas X is
A)
Carbon dioxide done
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B)
Water vapor done
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C)
Oxygen done
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D)
Nitrogen. done
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question_answer11)
Refer to the given flow chart and identity X, Y and Z.
A)
B)
C)
D)
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question_answer12)
Which of the following is a correct match?
A)
Waste from farmyards and food courts - Domestic waste done
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B)
Pesticides, pharmaceuticals and heavy metal sludge - Biodegradable waste done
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C)
Peels of fruits and vegetables, tea leaves - Organic waste done
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D)
Mineral wastes from mining and rubber waste - Kitchen waste done
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question_answer13)
Refer to the diagrammatic representation of water cycle and identify P, Q, R and S.
A)
P - Condensation; Q - Precipitation; R - Transpiration; S - Evaporation done
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B)
P - Precipitation; Q - Condensation; R - Transpiration; S - Evaporation done
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C)
P - Precipitation; Q - Condensation; R - Evaporation; S - Transpiration done
clear
D)
P - Precipitation; Q - Evaporation; R - Condensation; S - Transpiration done
clear
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question_answer14)
Kanika noticed that her potted plant was not growing healthily. She put few earthworms into the pot. After a few weeks, she noticed that her plants looked healthier. What could be the possible reason for this?
A)
The earthworms ate up the pests in the soil. done
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B)
The earthworms helped the plant to take in water. done
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C)
The earthworms allowed the plant to make food faster. done
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D)
The earthworms increased the air and nutrient content of the soil. done
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question_answer15)
Match column I with column II and select the correct option from codes given below.
Column I | Column II |
(a) Tea leaves | (i) Farmer's friend |
(b) Earthworm gas | (ii) Greenhouse |
(c) Microorganisms | (iii) Changes into compost |
(d) Polythene bags | (iv) Cannot be changed into compost |
(e) Methane | (v) Bacteria |
A)
(a)-(iii); (b)-(i); (c)-(v); (d)-(iv); (e)-(ii) done
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B)
(a)-(iii); (b)-(v); (c)-(i); (d)-(iv); (e)-(ii) done
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C)
(a)-(ii); (b)-(v); (c)-(i); (d)-(iii); (e)-(iv) done
clear
D)
(a)-(ii); (b)-(i); (c)-(iv); (d)-(v); (e)-(iii) done
clear
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question_answer16)
The different steps of vermicomposting are given below randomly.
(i) Spread sand on the floor of the pit |
(ii) Place red worms in the pit |
(iii) Cover with a grass |
(iv) Sprinkle water to keep it moist |
(v) Dig a pit in a suitable place |
(vi) Add vegetable peels and fruit waste in the pit |
Which of the following represents the correct sequence of steps?
A)
(v)\[\to \](vi)\[\to \](i)\[\to \](iii)\[\to \](ii)\[\to \](iv) done
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B)
(v)\[\to \](i)\[\to \](vi)\[\to \](iii)\[\to \](iv)\[\to \](ii) done
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C)
(v)\[\to \](i)\[\to \](iii)\[\to \](vi)\[\to \](ii)\[\to \](iv) done
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D)
(v)\[\to \](ii)\[\to \](iii)\[\to \](iv)\[\to \](i)\[\to \](iii) done
clear
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question_answer17)
Dustbin containing discarded material was left uncovered for sometime. Amount of different materials and factors related to them changed during these days which were plotted in the given graph.
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Select the correct option regarding this.
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A)
Q could be tin can. done
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B)
P could be decomposer microbes and R could be fruits and vegetables peel. done
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C)
P could be organic waste whereas S could be discarded syringe. done
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D)
All of these done
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question_answer18)
Refer to the given pie charts based on waste segregation methods X and Y and select the correct option.
A)
Method Y is more environment conscious because polythene bags are disposed with kitchen waste. done
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B)
Method X is more environment conscious because polythene bags are disposed off separately. done
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C)
Method Y is more environment conscious because newspapers are not generated. done
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D)
None of these done
clear
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question_answer19)
Refer to the given figure representing different layers of Earth's atmosphere and I select the incorrect statement regarding it.
A)
Wind, storm and snow are formed in P layer of atmosphere. done
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B)
Q is the atmospheric layer where most clouds are formed as 99% of the water vapours are present in this layer. done
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C)
In atmospheric layer R meteors burn up. done
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D)
Atmospheric layer S reflects radio waves. done
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question_answer20)
Study the given Venn diagram and identify the gases (L, M and N) present in our atmosphere.
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Select the incorrect option regarding characteristics X, Y and Z of these gases.
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A)
X- Support life on Earth done
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B)
Y- Inhibit combustion done
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C)
Z - Form compounds that are components of acid rain done
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D)
None of these done
clear
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