IIT JEE Practice Question and Answer
8Q: Who has won the men's shot put world title with a stunning series of throws climaxing with a best of 22.03 meters ? 1495 05b5cc6cce4d2b4197774e14e
5b5cc6cce4d2b4197774e14e- 1Randy Matsonfalse
- 2Tomas Walshtrue
- 3Ryan Crouserfalse
- 4Randy Barnesfalse
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Answer : 2. "Tomas Walsh"
Explanation :
Answer: B) Tomas Walsh Explanation:
Q: Which of the following is a secondary air pollutant? 1494 05b5cc670e4d2b4197774c06a
5b5cc670e4d2b4197774c06a- 1Acid raintrue
- 2SO2false
- 3CO2false
- 4Dust particlesfalse
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Answer : 1. "Acid rain"
Explanation :
Answer: A) Acid rain Explanation: Secondary pollutants include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight. Whereas Primary pollutant are those pollutants that are directly emitted from their sources, like CO2, CO, SO2 as these gases are directly emitted form burning of fossil fuels. Acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water, sulfuric acid etc. Hence, Acidrain is a secondary air pollutant.
Q: What happens when two atoms form a chemical bond? 1494 05b5cc6ace4d2b4197774d0c5
5b5cc6ace4d2b4197774d0c5- 1Two atoms fuse together to form a chemical bondfalse
- 2The atoms share or transfer electronstrue
- 3A chemical bond forms when two atoms transfer or share protons to achieve a stable nucleusfalse
- 4Like charges in the atoms cause them to stick togetherfalse
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Answer : 2. "The atoms share or transfer electrons"
Explanation :
Answer: B) The atoms share or transfer electrons Explanation: All chemistry is based on sharing electrons. A chemical bond forms when two atoms transfer or share outer electrons to complete their outer shells.
Q: Grey Revolution is associated with 1494 05b5cc6b4e4d2b4197774d4c0
5b5cc6b4e4d2b4197774d4c0- 1Cottonfalse
- 2Fruitsfalse
- 3Fertilizerstrue
- 4Oil seedsfalse
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Answer : 3. "Fertilizers"
Explanation :
Answer: C) Fertilizers Explanation: Grey Revolution is associated with Fertilizers. Cotton - Silver fiber Revolution Fruits - Golden Revolution Oil seeds - Yellow Revolution
Q: The Sivasamudram Falls is on which river ? 1494 05b5cc6c1e4d2b4197774db55
5b5cc6c1e4d2b4197774db55- 1Gangafalse
- 2Saryufalse
- 3Cauverytrue
- 4Krishnafalse
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Answer : 3. "Cauvery"
Explanation :
Answer: C) Cauvery Explanation:
Q: Which best describes transformation in bacteria? 1494 05b5cc65ee4d2b4197774be5f
5b5cc65ee4d2b4197774be5f- 1Bacteria take DNA from their environment.true
- 2Bacteria inject DNA into another cell.false
- 3Bacteria lie dormant for many weeks.false
- 4Bacteria transfer DNA with a bacteriophage.false
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Answer : 1. "Bacteria take DNA from their environment."
Explanation :
Answer: A) Bacteria take DNA from their environment. Explanation: "Bacteria take DNA from their environment" is what best describes transformation in bacteria.
Q: Which of the following is not a function of proteins? 1493 05b5cc6b3e4d2b4197774d3e8
5b5cc6b3e4d2b4197774d3e8- 1Build tissues such as bone and musclefalse
- 2Help to fight diseasefalse
- 3Nail formationfalse
- 4Store and transmit Hereditytrue
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Answer : 4. "Store and transmit Heredity"
Explanation :
Answer: D) Store and transmit Heredity Explanation: Protiens can help fight specific diseases, always there to regulate cell processes and build muscle/tissues. Structural proteins also known as Fibrous proteins, are necessary components of your body. They include collagen, keratin and elastin. Collagen forms the connective framework of your muscles, bones, tendons, skin and cartilage. Keratin is the main structural component in hair, nails, teeth and skin. Nucleic acids store and transmit heredity.
Q: Ratio between heights of two cylinder in the ratio 3:5. Their volumes are in the ratio 27:80. Find ratio between their radius ? 1492 05b5cc6c5e4d2b4197774dde1
5b5cc6c5e4d2b4197774dde1- 11:3false
- 22:1false
- 33:4true
- 44:7false
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Answer : 3. "3:4"
Explanation :
Answer: C) 3:4 Explanation: