Question No. 1
The polarimetry technique is recently in news is related to which of the following?
Question No. 2
Consider the following statements regarding the Black Hole:
1. A black hole is a place in space where gravity pulls so much that even light cannot get out.
2. The super-massive black hole at the center of the Milky Way galaxy is called Sagittarius A.
3. The Sun is not a big enough star to make a black hole.
Which of the statements given above is/are correct?
Question No. 3
Consider the following statements:
1. SODAR (Sonic Detection and Ranging) is used to measure the wind speed.
2. One of the defects of SODAR is relatively hard to transport and assemble.
Which of the statements given above is/are correct?
Question No. 4
PFAS (Per- and polyfluoroalkyl substances), is often seen in news is associated with which of the following?
Question No. 5
Which of the following event/events produces the “Gravitational Waves”?
1. Colliding black holes.
2. Massive stars exploding at the end of their lifetimes.
3. Super Cyclones.
Select the correct answer using the codes given below:
Question No. 6
Which of the following gases are created at the beginning of universe?
1. Hydrogen
2. Helium
3. Lithium
Select the correct answer using the codes given below:
Question No. 7
Which of the following is/are the examples of sublimation substances?
1. Menthol
2. Iodine
3. Dry ice
Select the correct answer using the codes given below: ?
Question No. 8
Which of the following statements is/are correct about “Arthropod”?
1. They are everywhere and are the largest animal phylum.
2. Arthropods are cold blooded animals.
Select the correct answer using the codes given below:
Question No. 9
Which of the following statements is/are correct about “Oxides of Sulfur”?
1. It is a colorless gas that can be detected by taste and smell.
2. It is hard to dissolve in water.
Select the correct answer using the codes given below:
Question No. 10
Which of the following statements is/are correct about “Styrene”?
1. It is a colorless liquid that evaporates easily and has a sweet smell.
2. It doesn’t dissolve easily in water.
3. Low levels of styrene also occur naturally in a variety of foods such as fruits, vegetables, nuts, beverages, and meats.
Select the correct answer using the codes given below:
Your Score Card
Total Number of Questions : 10
Total Not Attempted Questions : 0
Total Correct : 9
Total Wrong : 1
You have scored
17.34 / 20
Learnings—
“Oxides of Sulfur”—
Sulfur oxides (SOx) are compounds of sulfur and oxygen molecules. Sulfur dioxide (SO2) is the predominant form found in the lower atmosphere.
It is a colorless gas that can be detected by taste and smell in the range of 1,000 to 3,000 micrograms per cubic meter (µg/m3).
At concentrations of 10,000µg/m3, it has a pungent, unpleasant odor. Sulfur dioxide dissolves readily in water present in the atmosphere to form sulfurous acid (H2SO3).
About 30% of the sulfur dioxide in the atmosphere is converted to sulfate aerosol (acid aerosol), which is removed through wet or dry deposition processes.
Sulfur trioxide (SO3), another oxide of sulfur, is either emitted directly into the atmosphere or produced from sulfur dioxide and is rapidly converted to sulfuric acid (H2SO4).
Great !! nice attempt
Your Score Card
Total Number of Questions : 10
Total Not Attempted Questions : 0
Total Correct : 7
Total Wrong : 3
Good attempt, practice more
Answer of 9 is wrong, the answer should be A.
Every massive object that accelerates produces gravitational waves. This includes humans, cars, airplanes etc., but the masses and accelerations of objects on Earth are far too small to make gravitational waves big enough to detect with our instruments. To find big enough gravitational waves, we have to look far outside of our own solar system.
https://www.ligo.caltech.edu/page/gw-sources
Total Number of Questions : 10
Total Not Attempted Questions : 0
Total Correct : 7
Total Wrong : 3
Good attempt
Your Score Card
Total Number of Questions : 10
Total Not Attempted Questions : 4
Total Correct : 5
Total Wrong : 1
You have scored
9.34 / 20
Keep up the Revision and practice,
Total Number of Questions : 10
Total Not Attempted Questions : 0
Total Correct : 8
Total Wrong : 2
Very nice
Your Score Card
Total Number of Questions : 10
Total Not Attempted Questions : 0
Total Correct : 6
Total Wrong : 4
You have scored
9.36 / 20
*Supermassive black hole at the centre of milky way galaxy is called Saggitarius A.
*SODAR measures wind speed as a function of height and it is relatively easy to transport and assemble.
*
Super cyclone donot produce gravitational waves*Methanol, Iodine and Dry ice are all sublimable substance.
* Sulphur dioxide is colourless gas that is detected by taste and smell, sulphur trioxide is either directly emmited into atmosphere or converted from SO2.
*Styrene is colourless liquid evaporates easily that has sweet smell and it is not soluble in 🎣🎣 water (Primarily a synthetic chemical, found naturally too)
*Arthropods are everywhere, they are largest phylum and about 85% of animal belong to this class, they are cold blooded.
*Polarimetry measures optical activity of organic and inorganic compound.
*Per and Polyfluro alkyl are used in cosmetic.