IIT JEE Practice Question and Answer
8Q: Which results from an increase in the greenhouse effect? 1109 05b5cc658e4d2b4197774bdae
5b5cc658e4d2b4197774bdae- 1Ocean acidificationfalse
- 2Smog pollutionfalse
- 3Ozone depletionfalse
- 4All the abovetrue
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Answer : 4. "All the above"
Explanation :
Answer: D) All the above Explanation: A greenhouse gas (GHG) is any gas in the atmosphere that absorbs and emits radiation in the thermal infrared range. The increase in average global temperatures that results from an enhanced greenhouse effect. Effects of increased greenhouse gas emissions: Increases in the different greenhouse gases have other effects apart from global warming including ocean acidification, smog pollution, ozone depletion as well as changes to plant growth and nutrition levels.
Q: When was Judaism founded? 1438 05b5cc658e4d2b4197774bda3
5b5cc658e4d2b4197774bda3- Show AnswerHide Answer
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Answer :
Explanation :
Judaism is one of the oldest monotheistic religions and was founded over 3500 years ago in the Middle East. Jews believe that God appointed the Jews to be his chosen people in order to set an example of holiness and ethical behaviour to the world.
Q: 3/8 as a decimal 1180 05b5cc658e4d2b4197774bda4
5b5cc658e4d2b4197774bda4- 11.375false
- 22.375false
- 30.375true
- 43.75false
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Answer : 3. "0.375"
Explanation :
Answer: C) 0.375 Explanation: Expressing 3/8 as a decimal fraction: We can convert 3/8 into a decimal fraction by just dividing 3 by 8 or making 3 into 8 parts. Then, it is 3/8 = 0.375 as a decimal fraction. Other Method:: 3/8 as a Decimal : In this we should convert the denominator into 10, 100, 1000, 10000, 100000,... to make it simple. Now to make 8 into 1000, we multiply numerator and denominator with 125 => (3 x 125)/(8 x 125) = 375/1000 = 0.375.
Q: How long is a giraffe tongue in feet 1373 05b5cc658e4d2b4197774bd99
5b5cc658e4d2b4197774bd99- 11.6true
- 26false
- 318false
- 410false
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Answer : 1. "1.6"
Explanation :
Answer: A) 1.6 Explanation: A typical giraffe neck can stretch as long as six feet, the giraffe's tongue usually measures 18-20 inches long. Why that much long: Giraffe's eat Acacia tree leaves. The acacia tree's tasty leaves are protected by very sharp thorns. The giraffe's long tongue allows it to reach the highest, tastiest leaves while avoiding the sharp thorns. Its tongue also features a thick, tough layer that protects it from being cut by the thorns. If a giraffe's tongue does get cut by a thorn, its extra-thick saliva has antiseptic properties that help it to heal quickly.
Q: Intermolecular forces in HCl are 1272 05b5cc658e4d2b4197774bd9e
5b5cc658e4d2b4197774bd9e- 1Hydrogen bondingfalse
- 2Dipole-dipolefalse
- 3Dispersion forcefalse
- 4All the abovetrue
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Answer : 4. "All the above"
Explanation :
Answer: D) All the above Explanation: Intermolecular forces : The forces of attraction present in between the molecules or atoms or compounds is termed as intermolecular forces. The molecule HCl is composed of hydrogen and chlorine atom. There is high difference in electronegativities therefore, it is polar in nature. The H end of HCl is permanently slightly positive charge. The Cl end of HCl has a permanent slight negative charge. the "H" in one molecule is attracted to the "Cl" in a neighbor. The intermolecular force is weak compared to a covalent bond. But this dipole-dipole interaction is one of the stronger intermolecular attractions. It also has hydrogen bonding and dispersion forces. Dispersion forces are the weakest forces which are present in between all molecules or atoms.Hydrogen bonds are present in molecules having at least one H-A bond where A is the strong electronegative atom (mainly F, Cl and N).
Q: Which country imports the most metals? 1483 05b5cc655e4d2b4197774bd94
5b5cc655e4d2b4197774bd94- 1Chinafalse
- 2Japantrue
- 3Africafalse
- 4Australiafalse
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Answer : 2. "Japan"
Explanation :
Answer: B) Japan Explanation:
Q: The 'P' in DPT stands for 1732 05b5cc655e4d2b4197774bd8f
5b5cc655e4d2b4197774bd8f- 1Pulmonaryfalse
- 2Pneumoniafalse
- 3Pneumothoraxfalse
- 4Pertussistrue
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Answer : 4. "Pertussis"
Explanation :
Answer: D) Pertussis Explanation: DPT refers to a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis, and tetanus. Pertussis refers to whooping cough.
Q: The study of the weather is known as 1877 05b5cc655e4d2b4197774bd80
5b5cc655e4d2b4197774bd80- 1Weatherologyfalse
- 2Siesmologyfalse
- 3Meteorologytrue
- 4Pulmologyfalse
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Answer : 3. "Meteorology"
Explanation :
Answer: C) Meteorology Explanation: Meteorology is the study of weather and Earth's atmosphere. Climatology is another term used to describe the study of weather. Studying the weather is not only useful for determining if you'll need an umbrella for the day. While forecasting is an important aspect of studying weather, understanding weather patterns provides valuable information about the status of the planet.

