10th Grade > Chemistry
OUR ENVIRONMENT MCQs
Total Questions : 57
| Page 1 of 6 pages
Answer: Option B. -> Plastics cannot be decomposed by microbes.
:
B
Plastics are synthetic polymers andare derivedfrom the by-products of petroleum. The monomersderived from petroleum are combined together (polymerization) to make plastic. These polymeric substances cannot be digested or decomposed by any micro-organism and hence plastics are non-biodegradable.
:
B
Plastics are synthetic polymers andare derivedfrom the by-products of petroleum. The monomersderived from petroleum are combined together (polymerization) to make plastic. These polymeric substances cannot be digested or decomposed by any micro-organism and hence plastics are non-biodegradable.
Answer: Option B. -> By adding more plants and animals
:
B
An aquarium can be made self-sustained by adding more plants and animals in it which would help in recycling of certain substance like carbon dioxide, wastes etc which would otherwise pollute the environment of the aquarium.
:
B
An aquarium can be made self-sustained by adding more plants and animals in it which would help in recycling of certain substance like carbon dioxide, wastes etc which would otherwise pollute the environment of the aquarium.
Answer: Option B. -> food chains
:
B
A food web is formed by the interconnections of different food chains which are interdependent. It involves a complex interlinking of producersand consumers. Here, the organisms of a higher trophic level feed on several types of organisms belonging to a lower trophic level.
:
B
A food web is formed by the interconnections of different food chains which are interdependent. It involves a complex interlinking of producersand consumers. Here, the organisms of a higher trophic level feed on several types of organisms belonging to a lower trophic level.
Answer: Option B. -> Kitchen waste, leaves and fruit peels.
:
B
Kitchen waste, leaves and fruit peels are completely organic in nature and can be decomposed naturally into simpler compounds. The simple organic and inorganic molecules add to the fertility of the soil and make it nutrient rich.
Other substances mentioned are non-biodegradable and their direct disposal into soil or water can have harmful effects.Compost is biodegradable but in this case, it is grouped with non-biodegradable substances.
:
B
Kitchen waste, leaves and fruit peels are completely organic in nature and can be decomposed naturally into simpler compounds. The simple organic and inorganic molecules add to the fertility of the soil and make it nutrient rich.
Other substances mentioned are non-biodegradable and their direct disposal into soil or water can have harmful effects.Compost is biodegradable but in this case, it is grouped with non-biodegradable substances.
Answer: Option B. -> Grass, Goat and Human
:
B
Food chain is a series of organisms feeding on one another. From the given options, 'grass, goat and human' forms a food chain. Here, grass prepares its food during photosynthesis and becomes food for a goat, which in turn becomes food for humans. This food chain starts with producers (i.e.,grass) and ends in tertiary consumer (i.e. human).
:
B
Food chain is a series of organisms feeding on one another. From the given options, 'grass, goat and human' forms a food chain. Here, grass prepares its food during photosynthesis and becomes food for a goat, which in turn becomes food for humans. This food chain starts with producers (i.e.,grass) and ends in tertiary consumer (i.e. human).
Answer: Option B. -> Increased release of CFCs
:
B
The ozone depletion process begins when CFCs and other ozone-depleting substances (ODS) are emitted into the atmosphere. CFCs are extremely stable, and they do not dissolve in rain. After a period of time, CFC molecules reach the stratosphere. Due to the action of UV rays,CFCs release chlorine atoms.These chlorine atoms react with ozone molecules and destroy the ozone layer.
It is estimated that one chlorine atom can destroy over 1,00,000 ozone molecules before it is removed from the stratosphere.
:
B
The ozone depletion process begins when CFCs and other ozone-depleting substances (ODS) are emitted into the atmosphere. CFCs are extremely stable, and they do not dissolve in rain. After a period of time, CFC molecules reach the stratosphere. Due to the action of UV rays,CFCs release chlorine atoms.These chlorine atoms react with ozone molecules and destroy the ozone layer.
It is estimated that one chlorine atom can destroy over 1,00,000 ozone molecules before it is removed from the stratosphere.
Answer: Option C. -> Secondary consumer
:
C
A simple food chain starts with autotrophs. They are eaten by primary consumers (herbivores). Primary consumers are then eaten by secondary consumers, which are then eaten by tertiary consumers. Thus, tertiary consumers occupy the top level in the food chain.
In the given example, grasshopper is the primary consumer. Mouse occupies the trophic level of secondary consumers, while owl is the tertiary consumer.
:
C
A simple food chain starts with autotrophs. They are eaten by primary consumers (herbivores). Primary consumers are then eaten by secondary consumers, which are then eaten by tertiary consumers. Thus, tertiary consumers occupy the top level in the food chain.
In the given example, grasshopper is the primary consumer. Mouse occupies the trophic level of secondary consumers, while owl is the tertiary consumer.
Answer: Option A. -> True
:
A
Ozone is a deadly poisonous gas though it protects the Earth from harmful UV radiations. In other words,whenozoneforms at the surface of our planet as a result ofpollutants from cars reactingwith UV rays, it turns out to be a lethal pollutant itself.
In its pure formor when mixed with other substances, ozone causes many health hazards in humans. Inhalation of low amounts of ozone causes chest pain, coughing, shortness of breath, throat irritation, lung irritation etc. Ozone can also damage forests and crops.
:
A
Ozone is a deadly poisonous gas though it protects the Earth from harmful UV radiations. In other words,whenozoneforms at the surface of our planet as a result ofpollutants from cars reactingwith UV rays, it turns out to be a lethal pollutant itself.
In its pure formor when mixed with other substances, ozone causes many health hazards in humans. Inhalation of low amounts of ozone causes chest pain, coughing, shortness of breath, throat irritation, lung irritation etc. Ozone can also damage forests and crops.
Answer: Option C. -> UNEP
:
C
UNEP(United Nations Environment Programme) played an important role in forging an agreement to freeze CFC production to protect the ozone layer from depletion.UNEP uses its expertise to strengthen environmental standards and practices while helping implement environmental obligations at the country, regional and global levels.
:
C
UNEP(United Nations Environment Programme) played an important role in forging an agreement to freeze CFC production to protect the ozone layer from depletion.UNEP uses its expertise to strengthen environmental standards and practices while helping implement environmental obligations at the country, regional and global levels.
Answer: Option A. -> True
:
A
A food chain is a series of organisms where each organism becomes a food source for the next one. For example, grass becomes food for grasshopper and grasshopper for mouse and mouse for owl. In other words, afood chain is a basic network that shows the linear flow of nutrients and energy from one trophic level to another.
:
A
A food chain is a series of organisms where each organism becomes a food source for the next one. For example, grass becomes food for grasshopper and grasshopper for mouse and mouse for owl. In other words, afood chain is a basic network that shows the linear flow of nutrients and energy from one trophic level to another.
Latest Videos
Latest Test Papers
Login With Google
Old way of Login
Login With Email