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How many of the given statements regarding green hydrogen is/are correct? [2023]1. It can be used directly as a fuel for internal combustion.2. It can ...Read more
How many of the given statements regarding green hydrogen is/are correct? [2023]
1. It can be used directly as a fuel for internal combustion.
2. It can be blended with natural gas and used as fuel for heat or power generation. 3. It can be used in the hydrogen fuel cell to run vehicles.
Correct Answer: All three Explanation: It can be used directly as a fuel for internal combustion: Correct. Green hydrogen can be used as a fuel in internal combustion engines (ICEs) with modifications. Hydrogen combusts cleanly, emitting only water vapor as a byproduct, making it a potential alternaRead more
Thus, all three statements are correct.
See lessHow many of the given statements regarding mercury pollution is/are correct? [2023]1. Gold mining activity is a source of mercury pollution in the world.2. Coal-based thermal ...Read more
How many of the given statements regarding mercury pollution is/are correct? [2023]
1. Gold mining activity is a source of mercury pollution in the world.
2. Coal-based thermal power plants cause mercury pollution.
3. There is no known safe level of exposure to mercury.
Correct Answer: All three Explanation: Gold mining activity is a source of mercury pollution in the world: Correct. Artisanal and small-scale gold mining (ASGM) is one of the largest global sources of mercury emissions. Mercury is used in the extraction process to amalgamate gold, releasing significRead more
Hence, all three statements are correct.
See lessConsider the following statements: ...Read more
Consider the following statements: [2023]
1. Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket-powered only in the initial phase of flight.
2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.
Let's evaluate the two statements: Statement 1: Ballistic missiles are typically rocket-propelled and follow a parabolic trajectory that reaches the upper atmosphere before re-entering and hitting the target at high speeds, often supersonic or hypersonic. Cruise missiles, on the other hand, are typiRead more
Let’s evaluate the two statements:
The statement that ballistic missiles are jet-propelled at subsonic speeds throughout their flight and cruise missiles are rocket-powered only in the initial phase is incorrect. In fact, it should be the other way around: Ballistic missiles are rocket-propelled throughout their flight, while cruise missiles are jet-powered for most of their flight.
Therefore, Statement 2 is also incorrect.
Both statements are incorrect.
The correct answer is: Neither 1 nor 2.
See lessWhich one of the following countries has its own Satellite Navigation System? [2023]
Which one of the following countries has its own Satellite Navigation System? [2023]
Read lessThe country that has its own satellite navigation system is Japan. Japan's satellite navigation system is called QZSS (Quasi-Zenith Satellite System), which provides satellite-based positioning and timing information, mainly in the Asia-Pacific region. Australia, Canada, and Israel do not have theirRead more
The country that has its own satellite navigation system is Japan. Japan’s satellite navigation system is called QZSS (Quasi-Zenith Satellite System), which provides satellite-based positioning and timing information, mainly in the Asia-Pacific region.
So, the correct answer is: Japan.
See lessLet's evaluate the pairs one by one: Cepheids: These are stars that brighten and dim periodically due to changes in their size and temperature. The description in the pair refers to stars and not to giant clouds of dust and gas. Hence, this pair is incorrect. Nebulae: Nebulae are giant clouds of dusRead more
Let’s evaluate the pairs one by one:
Therefore, only one of the pairs is correctly matched.
The answer is: Only one.
See lessWith reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements: ...Read more
With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements: [2023]
1. Biofilters provide waste treatment by removing uneaten fish feed.
2. Biofilters convert ammonia present in fish waste to nitrate.
3. Biofilters increase phosphorus as nutrient for fish in water.
Biofilters play a crucial role in Recirculating Aquaculture Systems by eliminating nitrogenous waste produced by aquatic organisms. They utilize nitrifying bacteria to transform toxic ammonia into nitrites, which are also harmful. Subsequently, other bacteria further convert these nitrites into harmRead more
Biofilters play a crucial role in Recirculating Aquaculture Systems by eliminating nitrogenous waste produced by aquatic organisms. They utilize nitrifying bacteria to transform toxic ammonia into nitrites, which are also harmful. Subsequently, other bacteria further convert these nitrites into harmless nitrates, ensuring water quality. Importantly, biofilters are engineered to remove pollutants rather than introduce nutrients into the system, making statement 3 inaccurate.
See lessConsider the following actions: ...Read more
Consider the following actions: [2023]
1. Detection of car crash/collision which results in the deployment of airbags almost instantaneously
2. Detection of accidental free fall of a laptop towards the ground which results in the immediate turning off of the hard drive
3. Detection of the tilt of the smart-phone which results in the rotation of display between portrait and landscape mode
The correct answer is All three. Here’s how an accelerometer is involved in each action: 1. Detection of Car Crash/Collision An accelerometer detects rapid deceleration or impact forces, which triggers the deployment of airbags almost instantaneously. Function of accelerometer: Required. 2. DetectioRead more
The correct answer is All three.
Here’s how an accelerometer is involved in each action:
An accelerometer is required in all three actions, as it plays a crucial role in detecting motion, orientation, or force changes in each scenario. Thus, the correct answer is All three.
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Select any one of the following options given above.
Select any one of the following options given above.
Read lessThe village known as "The Most Haunted Village of India" is Kuldhara, located near Jaisalmer in Rajasthan. Kuldhara is often referred to as a ghost village due to its abandoned state and the legends surrounding its desolation. According to local lore, the village was once home to the Paliwal BrahminRead more
The village known as “The Most Haunted Village of India” is Kuldhara, located near Jaisalmer in Rajasthan. Kuldhara is often referred to as a ghost village due to its abandoned state and the legends surrounding its desolation. According to local lore, the village was once home to the Paliwal Brahmins, who fled overnight in 1825 to escape the oppressive demands of a local minister, leaving behind a curse that no one would ever be able to inhabit the village again.
While Kuldhara is recognized for its haunted reputation, it’s worth noting that Bhangarh Fort is frequently cited as the most haunted place in India, although it was not included in your options. The stories and eerie atmosphere surrounding both locations attract many visitors interested in the supernatural.
See lessWhich period is considered as the golden period of Indian history?
Which period is considered as the golden period of Indian history?
Read lessThe Gupta Empire period (circa 320 CE to 550 CE) is widely considered the Golden Period of Indian History. This era was marked by remarkable achievements in various fields, including art, literature, science, mathematics, and philosophy. The Guptas established a stable and prosperous empire that encRead more
The Gupta Empire period (circa 320 CE to 550 CE) is widely considered the Golden Period of Indian History. This era was marked by remarkable achievements in various fields, including art, literature, science, mathematics, and philosophy. The Guptas established a stable and prosperous empire that encouraged intellectual and cultural advancements, making it one of the most celebrated periods in Indian history.
Key Highlights of the Gupta Golden Age:
1. Literature:
The composition of classical Sanskrit texts like Kalidasa’s works (e.g., Abhijnanashakuntalam and Meghaduta).
Development of epics, Puranas, and Dharmashastra texts.
2. Science and Mathematics:
Aryabhata’s contributions, such as the concept of zero, the decimal system, and advancements in astronomy.
Varahamihira’s works in astronomy and astrology.
3. Art and Architecture:
Creation of exquisite sculptures and temples, like those at Ajanta and Ellora caves.
Development of the Gupta style of art, which influenced Buddhist and Hindu artistic traditions.
4. Philosophy and Religion:
Flourishing of Hinduism, Buddhism, and Jainism.
Philosophical works by scholars like Vatsyayana (Kamasutra) and contributions to Nyaya and Mimamsa schools of thought.
5. Political Stability and Prosperity:
Strong administration under rulers like Chandragupta I, Samudragupta, and Chandragupta II (Vikramaditya).
Extensive trade networks and a prosperous economy.
The Gupta period’s advancements significantly influenced not only Indian civilization but also other cultures through trade and the spread of knowledge, making it a true “golden age.”
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Analysis: Bulgaria: Does not share a land border with Ukraine. Bulgaria is located south of Romania and separated from Ukraine by Romania. Czech Republic: Does not share a land border with Ukraine. The Czech Republic is located west of Slovakia, which lies between it and Ukraine. Hungary: Shares a lRead more
Analysis:
Does not share a land border with Ukraine. Bulgaria is located south of Romania and separated from Ukraine by Romania.
Does not share a land border with Ukraine. The Czech Republic is located west of Slovakia, which lies between it and Ukraine.
Shares a land border with Ukraine. Hungary borders western Ukraine directly.
Does not share a land border with Ukraine. Latvia is located north of Belarus and does not touch Ukraine.
Does not share a land border with Ukraine. Lithuania is also north of Belarus and does not border Ukraine.
Shares a land border with Ukraine. Romania borders southern Ukraine, specifically the Odesa and Chernivtsi regions.
Source: Britannica
Conclusion:
The correct countries that share a land border with Ukraine from the list are:
Final Answer: Only two.
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