DAY 96
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Question 1 of 5
1. Question
2 points1. Consider the following statements about metals:
- 1. All metals are hard solids.
- All metals have high specific gravity.
- All metals have a high melting point.
Which of the statements given above is/are incorrect?
Correct
Answer: D
Explanation:
- All the statements are incorrect.
- Statement 1: Metals like Lithium, Sodium etc. are soft and can be cut with a knife. Mercury is a liquid metal.
- Statement 2: Most metals have high specific gravity, but metals like lithium have low specific gravity.
- Statement 3: Metals such as sodium, lithium etc. have low melting points.
Incorrect
Answer: D
Explanation:
- All the statements are incorrect.
- Statement 1: Metals like Lithium, Sodium etc. are soft and can be cut with a knife. Mercury is a liquid metal.
- Statement 2: Most metals have high specific gravity, but metals like lithium have low specific gravity.
- Statement 3: Metals such as sodium, lithium etc. have low melting points.
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Question 2 of 5
2. Question
2 points2. Consider the following statements about Gravitational Waves
- They are invisible ripples in space.
- They are first discovered by Albert Einstein.
- They travel at the speed of light.
Which of the statements given above is/are incorrect?
Correct
Answer. B
Explanation:
- Only statement 2 is incorrect: Although Einstein predicted their existence, it was only in 2015. Scientists detected gravitational waves for the very first time. They used a very sensitive instrument called LIGO (Laser Interferometer Gravitational-Wave Observatory). These first gravitational waves happened when two black holes crashed into one another. The collision happened 1.3 billion years ago.
Incorrect
Answer. B
Explanation:
- Only statement 2 is incorrect: Although Einstein predicted their existence, it was only in 2015. Scientists detected gravitational waves for the very first time. They used a very sensitive instrument called LIGO (Laser Interferometer Gravitational-Wave Observatory). These first gravitational waves happened when two black holes crashed into one another. The collision happened 1.3 billion years ago.
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Question 3 of 5
3. Question
2 points3. Consider the following statements about Plasmolysis
- It is the process of losing water by a Plant Cell.
- It is not observed in plants found in the desert region.
Which of the statements given above is/are correct?
Correct
Answer: A.
Explanation:
- Statement 1 is correct: Plasmolysis is the process of losing water by a plant cell.
- Statement 2 is incorrect: Plasmolysis is also observed in plants found in the desert region.
Incorrect
Answer: A.
Explanation:
- Statement 1 is correct: Plasmolysis is the process of losing water by a plant cell.
- Statement 2 is incorrect: Plasmolysis is also observed in plants found in the desert region.
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Question 4 of 5
4. Question
2 points4. Consider the following statements
- Atomic time measure the actual length of a second based on the Oscillation of the Gold Atom.
- Bureau of Indian standards is dubbed as the timekeeper of the country, as it manages Atomic Time.
- With the inauguration of National Atomic Time, India reaches an accuracy of 8 Nanoseconds.
Which of the statements given above is/are correct?
Correct
Answer: D
Explanation:
- National Physical Laboratory India (NPLI)is the Time Keeper of the Country and is responsible for the highest level of time and frequency measurements in India at par with the international standards. The timescale UTC (NPLI) is maintained with the help of five Cesium (Cs) atomic clocks and a Hydrogen Maser. All 5 Cs clocks and the H-Maser are contributing to International Atomic Time (TAI) through precise, regulated, automated intercomparison of clocks, precise satellite links and automatic daily upload of data to BIPM
- With the newly inaugurated National Atomic Time, India has become self-reliant in measuring time within the range of nanoseconds. It has now achieved the accuracy level of 2.8 Nanosecond matching the International Standard Time.
Incorrect
Answer: D
Explanation:
- National Physical Laboratory India (NPLI)is the Time Keeper of the Country and is responsible for the highest level of time and frequency measurements in India at par with the international standards. The timescale UTC (NPLI) is maintained with the help of five Cesium (Cs) atomic clocks and a Hydrogen Maser. All 5 Cs clocks and the H-Maser are contributing to International Atomic Time (TAI) through precise, regulated, automated intercomparison of clocks, precise satellite links and automatic daily upload of data to BIPM
- With the newly inaugurated National Atomic Time, India has become self-reliant in measuring time within the range of nanoseconds. It has now achieved the accuracy level of 2.8 Nanosecond matching the International Standard Time.
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Question 5 of 5
5. Question
2 points5. Consider the following statements about Hydrogen
- Blue Hydrogen is produced from fossil fuels
- Green Hydrogen is produced from fossil fuel with carbon capture and storage options.
Which of the statements given above is/are correct?
Correct
Answer: D
Explanation:
- Being a zero-carbon fuel, Hydrogen is considered to be one of the key sources of clean energy for the future. This fuel can be produced from various sources like natural gas, nuclear power, biomass, and renewable power like solar and wind. There are three types of Hydrogen – grey, blue and green. The fuel produced from fossil fuels is called grey hydrogen, those produced from fossil fuels with carbon capture and storage options are called blue Hydrogen, while those produced from renewable power sources are called green Hydrogen.
Incorrect
Answer: D
Explanation:
- Being a zero-carbon fuel, Hydrogen is considered to be one of the key sources of clean energy for the future. This fuel can be produced from various sources like natural gas, nuclear power, biomass, and renewable power like solar and wind. There are three types of Hydrogen – grey, blue and green. The fuel produced from fossil fuels is called grey hydrogen, those produced from fossil fuels with carbon capture and storage options are called blue Hydrogen, while those produced from renewable power sources are called green Hydrogen.
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