Tag: chemistry

Questions Related to chemistry

_____________ is a technique of watering plants by making use of narrow tubings which deliver water directly at the base of the plant.

chemistry water in our life how can we conserve water? droughts, floods and water conservation conservation of water and its importance and methods

  1. Sprinkler irrigation

  2. Drip irrigation

  3. Center pivot irrigation

  4. Localized irrigation

Show answer
Correct Option: B
Explanation:

Drip irrigation is a method of irrigation in which water is dripped slowly to the roots of the plants through narrow tubes. This method allows water to be delivered directly to the base of the plants. This method conserves water.
Drip irrigation is also known as a localized irrigation.
Sprinkler irrigation supply water in the same manner as supplied by the rainfall. Here water is distributed through the system of pipes and then it is sprayed on the areas through sprinklers.
In center pivot irrigation, the equipment rotates around the pivot and water is supplied through sprinklers.

Which of the following is/are NOT a way/(s) of water conservation?

chemistry water in our life how can we conserve water? droughts, floods and water conservation conservation of water and its importance and methods

  1. One way of increasing the availability of water is to collect rainwater and store it for later use

  2. One way of increasing the availability of water is to collect rainwater when it is required for use

  3. Both of the above

  4. None of the above

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Correct Option: C

Why plants die due to water scarcity?

chemistry water in our life how can we conserve water? droughts, floods and water conservation conservation of water and its importance and methods

  1. Because plants can not survive without water.

  2. Water transport nutrients to other part of plant.

  3. Water is important to carry different processes in plants.

  4. All of them.

Show answer
Correct Option: D

Which of the following types of plant grow in water scarcity?

chemistry water in our life how can we conserve water? droughts, floods and water conservation conservation of water and its importance and methods

  1. Xerophytes

  2. Hydrophytes

  3. Both A and B

  4. None

Show answer
Correct Option: A
Explanation:

Xerophytes grow in water scarcity, they develop thick cuticle and reduce the loss of water.

In our country, floods cause extensive damage to ____________.

chemistry water in our life how can we conserve water? droughts, floods and water conservation conservation of water and its importance and methods

  1. crops

  2. domestic animals

  3. human life

  4. All of the above.

Show answer
Correct Option: D
Explanation:

In our country, floods cause extensive damage to crops, domestic animals, property and human life. During floods, the animals get carried away with the waters, get trapped on land areas and die.

Which of the following is traditional way to conserve water?

chemistry water in our life how can we conserve water? droughts, floods and water conservation conservation of water and its importance and methods

  1. Tube-well

  2. Bawris

  3. Rainwater harvesting

  4. None of these

Show answer
Correct Option: B
Explanation:

Bawris are one of the old methods of rain water management. These are deep wells dug in the ground which have steps to reach the water stored. These bawris help in storage of water for longer time as the amount of evaporation of water from the deep well is very less.Bawris are very popular in Rajasthan. People of Rajasthan get access to water through bawris even in summer season.

Which of the following crop cannot be grown in less water availability?

chemistry water in our life how can we conserve water? droughts, floods and water conservation conservation of water and its importance and methods

  1. Wheat

  2. Maize

  3. Vegetables

  4. Rice

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Correct Option: D

Agriculture use .......... of the world's water usage.

chemistry water in our life how can we conserve water? droughts, floods and water conservation conservation of water and its importance and methods

  1. 50%

  2. 2%

  3. 70%

  4. 22%

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Correct Option: C

Which hormone level increases during water scarcity condition?

chemistry water in our life how can we conserve water? droughts, floods and water conservation conservation of water and its importance and methods

  1. Auxin

  2. Cytokinine

  3. Abscisic acid

  4. Ethylene

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Correct Option: C

Identify the physical change:

chemistry phenomena around us comparison between physical and chemical changes introduction to physical and chemical changes change around us

  1. Photosynthesis

  2. Respiration

  3. Digestion of food

  4. Melting of Wax

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Correct Option: D
Explanation:

Melting of wax is a physical change. In a burning candle there are both physical and chemical changes. The burning of the solid wax to form liquid wax and the evaporation of liquid wax to form wax vapour are physical changes. The burning of wax vapour is a physical change.