1. When day is smaller than night
2. When day is the longest in the year
3. When day is greater than night
4. When day and night are equal
Option “4” is correct. On the day of the equinox, the center of the Sun spends a roughly equal amount of time above and below the horizon at every location on the Earth, so night and day are equal on Equinox.
122. Which is the largest Union Territory of India?
Option “2” is correct. Largest union territory is Andaman & Nicobar island and smallest island is Lakshadweep.
123. World’s longest land border is between which two countries?
1. Australia and New Zealand
2. India and China
3. Switzerland and Italy
4. Canada and USA
Option “4” is correct. Canada is the world’s second largest country, and the United States (fourth largest) share the longest international border between two countries in the world.
124. Baghdad is the Capital City of ________.
1. Iraq
2. Thailand
3. China
4. Russia
Option “1” is correct. Baghdad is the capital of Iraq.
125. What is the Greenhouse Effect?
1. The fall in population of plants due to human activity
2. It is the warming of earth’s surface due to its atmosphere
3. The polluting effect of burning fossil fuels
4. The heating of the atmosphere due to depletion of the ozone layer
Option “2” is correct. Greenhouse Effect is the warming of earth’s surface due to its atmosphere.The greenhouse effect is a natural process that warms the Earth’s surface. When the Sun’s energy reaches the Earth’s atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases.
126. Magnetic Meridian is a-
1. Line parallel to the equator of the Earth
2. Latitude
3. Line joining the geographic north and geographic south of Earth
4. Plane passing through the magnetic north and magnetic south of Earth
Option “4” is correct. The magnetic meridian is an equivalent imaginary line connecting the magnetic south and north poles. A compass needle will be parallel to the magnetic meridian.
127. In a rainforest, the vegetation that grows under the shade of a canopy is known as-
1. Crown
2. Canopy
3. Under storey
4. Forest floor
Option “3” is correct. The understory is the underlying layer of vegetation in a forest or wooded area, especially the trees and shrubs growing between the forest canopy and the forest floor.
128. “Great Barrier Reef”, the world’s largest Coral reef is located in-
1. Caribbean Islands
2. Australia
3. Philippines
4. Indonesia
Option “2” is correct. The Great Barrier Reef runs along the coast of Queensland from the Tropical North to Bundaberg of Australia.
129. The polar regions are sparsely populated because of –
1. lack of minerals
2. unsuitable climatic conditions
3. infertile land
4. mountainous topography
Option “2” is correct. The polar regions are sparsely populated because of unsuitable climatic conditions.
130. Algal bloom results from –
1. Global warming
2. Salination
3. Eutrophication
4. Biomagnification
Option “3” is correct. Eutrophication is one of the most widespread environmental problems of inland waters, and is their unnatural enrichment with two plant nutrients, phosphorus and nitrogen.One important result of lake and reservoir enrichment is increased growth of microscopic floating plants, algae, and the formation of dense mats of larger floating plants such as water hyacinths and Nile cabbage.
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