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- Question
Bright light is found to emit from photographer?s flashgun. This brightness is due to the presence of which one of the following noble gases?
Options- A. Argon
- B. Xenon
- C. Neon
- D. Helium
- Correct Answer
- Xenon
ExplanationElectronic Flash differs from the consumable bulb flash in important aspects. Instead of creating light by burning up in an atmosphere containing oxygen, a consumable material (each bulb being used therefore only once), it produces a brilliant incandescent by discharging a current for a brief instant through a rarified gas, usually xenon. The gas glows every time the discharge is made through it but it is not consumed, so that many thousands of flashes are obtainable from a single tube, which helps to offset the much higher cost of the initial apparatus.
- 1. Statement I : Tides are the rise and fall of sea levels caused by the combined effects of the gravitationed forces exerted by the Moon and the Sun and the rotation of the Earth. Statement II : The Earth rotates from west to east.
Options- A. Both the statements are individually true and Statement II is the correct explanation of Statement I
- B. Both the statements are individually true but Statement II is not the correct explanation of Statement I
- C. Statement I is true but Statement II is false
- D. Statement I is false but Statement II is true Discuss
- 2. Statement I : Portions of glacial troughs may exhibit remarkably flat floors. Statement II : The flat floor in a glacial trough is produced by uniform glacial erosion.
Options- A. Both the statements are individually true and Statement II is the correct explanation of Statement I
- B. Both the statements are individually true but Statement II is not the correct explanation of Statement I
- C. Statement I is true but Statement II is false
- D. Statement I is false but Statement II is true Discuss
- 3. Statement I : Incised meanders are formed in the mature stage of a river. Statement II : Incised meanders are characterized by rejuvenation and upliftment of land.
Options- A. Both the statements are individually true and Statement II is the correct explanation of Statement I
- B. Both the statements are individually true but Statement II is not the correct explanation of Statement I
- C. Statement I is true but Statement II is false
- D. Statement I is false but Statement II is true Discuss
- 4. Statement I : By far the most common topographic form in a Karst terrain is the sinkhole. Statement II : Topographically, a sinkhole is a depression that varies in depth from less than a meter to few hundred meters.
Options- A. Both the statements are individually true and Statement II is the correct explanation of Statement I
- B. Both the statements are individually true but Statement II is not the correct explanation of Statement I
- C. Statement I is true but Statement II is false
- D. Statement I is false but Statement II is true Discuss
- 5. Green House Effect' means
Options- A. Pollution in houses in tropical region
- B. Prevention of ultraviolet radiation by the ozone layer
- C. Trapping of solar energy due to atmospheric gases
- D. Damage to green painted buildings Discuss
- 6. Which one of the following is India?s first indigenously designed and developed long-range subsonic cruise missile which can be deployed from multiple platforms?
Options- A. Astra
- B. Akash
- C. Nirbhay
- D. Shankhnaad Discuss
- 7. Which of the following is the most abundant metal on Earth's crust?
Options- A. Magnesium
- B. Iron
- C. Copper
- D. Aluminium Discuss
- 8. Red rot is a disease caused to which of the following plant?
Options- A. Paddy
- B. Sugarcane
- C. Mustard
- D. Wheat Discuss
- 9. Red data book contains data of which of the following?
Options- A. All plant species
- B. All animal species
- C. All endangered species
- D. All extinct species Discuss
- 10. Which among the following is the major cause of acid rain?
Options- A. Carbon dioxide
- B. Carbon monoxide
- C. Nitrogen dioxide
- D. Oxygen Discuss
General Science problems
Search Results
Correct Answer: Both the statements are individually true but Statement II is not the correct explanation of Statement I
Explanation:
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of Earth.
Statement 2 is also correct. But it is not the correct explanation for the 1st statement.
Correct Answer: Both the statements are individually true and Statement II is the correct explanation of Statement I
Explanation:
Glaciers cut distinctive U-shaped valleys with a flat floor and steep sides. These are an example of a glacial erosion landform.
Example: As the main glacier erodes deeper into the valley, the tributary is left higher up the steep sides of the glacier.
Correct Answer: Statement I is false but Statement II is true
Explanation:
Rejuvenation occurs when the river?s base level falls (i.e. when sea level falls). This can be a consequence of either a fall in the amount of sea water or the land rising. Incised meanders are meanders which are particularly well developed and occur when a river?s base level has fallen giving the river a large amount of vertical erosion power, allowing it to down cut. Hence, 2nd statement is correct.
There are two types of incised meanders, entrenched meanders and ingrown meanders.As they are products of rejuvenation, they are not formed in mature stage of a river
Correct Answer: Both the statements are individually true but Statement II is not the correct explanation of Statement I
Explanation:
A sinkhole (in Karst topography) is a hole in the ground that forms when water dissolves surface rock. Often, this surface rock is limestone, which is easily eroded, or worn away, by the movement of water.
Formation of a Sinkhole: In a landscape where limestone sits underneath the soil, water from rainfall collects in cracks in the stone. These cracks are called joints. Slowly, as the limestone dissolves and is carried away, the joints widen until the ground above them becomes unstable and collapses. The collapse often happens very suddenly and without very much warning. Water collects in these collapsed sections, forming sinkholes.
Sinkholes also form when the roofs of caves collapse. Sinkholes are often funnel-shaped, with the wide end open at the surface and the narrow end at the bottom of the pool.Sinkholes vary from shallow holes about 1 meter (3 feet) deep, to pits more than 50 meters (165 feet) deep.
Correct Answer: Trapping of solar energy due to atmospheric gases
Correct Answer: Nirbhay
Explanation:
Nirbhay missile is India's first indigenously designed and developed long range sub-sonic cruise missile.It is designed and made by DRDO (Defence Research & Development Organisation).The Nirbhay missile can be deployed from multiple platforms.
Correct Answer: Aluminium
Correct Answer: Sugarcane
Correct Answer: All endangered species
Correct Answer: Nitrogen dioxide
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