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- Question
Which of the following statements concerning atmosphere of the Earth are correct? 1. In stratosphere, temperature increases with altitude. 2. In mesosphere, temperature decreases with altitude. 3. The lowest temperature of the atmosphere is recorded in the upper part of mesosphere. 4. Tropopause is an isothermal zone. Select the correct answer using the code given below.
Options- A. 1 and 2 only
- B. 1, 2 and 3 only
- C. 3 and 4 only
- D. 1, 2, 3 and 4
- Correct Answer
- 1, 2, 3 and 4
ExplanationIn troposphere and mesosphere, temperature declines with increasing altitude. In stratosphere and thermosphere, temperature increases with increasing altitude.The coldest temperatures in Earth?s atmosphere occur at the top of mesosphere, the Mesopause, especially in the summer near the pole.Transitional layers of atmosphere include tropopause, stratopause, and mesopause. These layers are relatively thin and are located between major layers of atmosphere. These have contrasting thermal properties. Hence, in these layers there is no change in temperature with change in altitude.
- 1. The elemental composition of an adult human body by mass is
Options- A. C > O > H > N
- B. O >C >H > O
- C. N > C > O > H
- D. None Discuss
- 2. ?Altitude sickness? is caused at high altitude due to
Options- A. high partial pressure of oxygen
- B. low partial pressure of oxygen
- C. low level of haemoglobin
- D. high partial pressure of carbon dioxide Discuss
- 3. With reference to earthquakes, which of the following statements are correct? A. Earthquakes largely occur along the converging plate boundaries. B. Point of origin of earthquake in lithosphere is known as focus/hypocenter. C. Intensity of earthquake decreases with distance from the epicenter. D. Epicentre of earthquake always remains over continents only. Select the correct answer using the code given below.
Options- A. 1 and 2 only
- B. 1, 2 and 3
- C. 2 and 3 only
- D. 1 and 4 Discuss
- 4. Excessive use of which ofthe following fertilizers may be responsible for the presence of a toxic substance in groundwater?
Options- A. Nitrogen
- B. Phosphate only
- C. Potassium only
- D. Phosphate and potassium Discuss
- 5. Dolomite power is applied in some agricultural lands. The purpose of applying it is to
Options- A. increase the pH of the soil
- B. lower the pH of the soil
- C. increase the phosphorus content of the soil
- D. increase the nitrogen content of the soil Discuss
- 6. Which one of the following statements is not correct?
Options- A. Position of the sun, Earth and Moon in a straight line of 180oangle is known as syzygy.
- B. Syzygy conjunction causes solar eclipse.
- C. Syzygy opposition causes lunar eclipse.
- D. Syzygy conjunction occurs at the time of perihelion only. Discuss
- 7. Which one of the following is not related to wind erosion ?
Options- A. Wind gap
- B. Zeugen
- C. Dreikanter
- D. Demoiselle Discuss
- 8. Very small insoluble particles in a liquid may be separated from it by using
Options- A. crystallization
- B. fractional distillation
- C. centrifugation
- D. decantation Discuss
- 9. Marble comes under which category of rocks?
Options- A. Sedimentary
- B. Igneous
- C. Metamorphic
- D. None of these Discuss
- 10. The phenomena of raising the outer edge of the curved roads above the inner edge to provide necessary centripetal force to the vehicles to take a safe turn is called _____.
Options- A. banking of roads
- B. cornering of roads
- C. elevation of roads
- D. tempering of roads Discuss
General Science problems
Search Results
Correct Answer: O >C >H > O
Explanation:
Correct Answer: low partial pressure of oxygen
Explanation:
Altitude sickness, the mildest form being acute mountain sickness (AMS), is the negative health effect of high altitude, caused by rapid exposure to low amounts of oxygen at high elevation.
Correct Answer: 1, 2 and 3
Explanation:
Epicentre of Earthquakes can be over both oceanic and continental surface. Epicentres above oceanic surface are cause of tsunamisof large intensity. Anearthquake's hypocentreis the position where the strain energy stored in the rockis first released, marking thepointwhere the fault begins to rupture.
Correct Answer: Nitrogen
Explanation:
Excessive use of nitrate including manure may be responsible forthe presence of toxic substance in groundwater. Phosphate can also enter the groundwater via excessive use of fertilizers. High application rates of nitrogen containing fertilizers combined with the high-water solubility of nitrate, leads to increased runoff into surface water as well as leaching into groundwater, thereby causing groundwater pollution.
Only a fraction of the nitrogen-based fertilizers, is converted to produce and other plant matter. Nitrate pollution in groundwater comes from pit latrines, it can cause blue baby syndrome.
Correct Answer: increase the pH of the soil
Explanation:
Dolomite is a limestone compound that contains calcium and magnesium. It provides valuable nutrients to plants and helpschange the pH of the soil by raising it to match the plants' needs. It evenprovides more nutrients than straight lime. It is often used in addition to balanced fertilizers, particularly with seeding fruit.
Correct Answer: Syzygy conjunction occurs at the time of perihelion only.
Explanation:
In astronomy, a syzygy is a straight-line configuration of three or more celestial bodies in a gravitational system.Solar and lunar eclipses occur at times of syzygy, as do transits and occultations.
Correct Answer: Wind gap
Explanation:
Demoiselles
These are rock pillars which stand as resistant rocks above soft rocks as a result of differential erosion of hard and soft rocks.
Zeugen
A table-shaped area of rock found in arid and semi-arid areas formed when more resistant rock is reduced at a slower rate than softer rocks around it.
A Dreikanter
It is a type of ventifact that typically forms in desert or periglacial environments due to the abrasive action of blowing sand.
A wind gap is a gap through which a waterway once flowed that is now dry as a result of stream capture.
Correct Answer: centrifugation
Explanation:
Sometimes the solid particles in a liquid are very small and can pass through a filter paper. For such particles, the filtration technique cannot be used for separation. Such mixtures are separated by centrifugation.
Correct Answer: Metamorphic
Correct Answer: banking of roads
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