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Question : Read the passage and answer the following questions.
IIT Delhi researchers have designed and fabricated a device that can generate electricity from water drops, raindrops, water streams, and even from ocean waves using "Triboelectric Effect" and "Electrostatic Induction". The device is called "Liquid-solid Interface Triboelectric Nanogenerator". The generated electricity can be stored in batteries for further use. Triboelectric effect is a known phenomenon for a long time, and in this effect, charges are generated when two surfaces are in friction. The best example we see are sparkling lights when we move the blankets/jackets.

The device has a very simple structure consisting of specially designed nanocomposite polymers and contact electrodes and can generate a few Milliwatt mW power, which is sufficient to power small electronic devices like watches, digital thermometers, radio frequency transmitters, healthcare sensors, pedometers. When compared to conventional methods, such as the use of the piezoelectric effect, the present device can generate significantly more electricity.

The researchers successfully incorporated nanostructures into a polymer matrix, which enhanced the film's surface roughness, polarizability, and hydrophobicity, among other characteristics, as a result. Due to the enhancement in the above property, the flexible film is used to fabricate the device where raindrops have just to slide down and can generate electricity. The artificially created rough surface allows to generate more charge and superhydrophobic properties of the solid surface help to roll the water drop without getting stick to the surface.

The IIT Delhi research team also explored the underlying mechanism of the electricity generated when the water drop comes in contact with the solid surface and it is shown that saline water drops generate more electricity. The researchers also showed that the device can even work with ocean waves, where the water is saline, and through the ocean waves contacting the surface of nanocomposite polymer film, electricity is generated.

Question:Name the electronic devices which can be powered with the device mentioned in the passage:
1. Watches
2. Pedometers
3. Refrigerators
4. Radio Frequency Transmitters

 

Option 1: Only 1 and 2
 

Option 2: All 1,2,3, and 4
 

Option 3: Only 3 and 4
 

Option 4: Only 1,2 , and 4

Team Careers360 25th Jan, 2024

Correct Answer: Only 1,2 , and 4


Solution : The correcrt option is 4 i.e  "Only 1, 2, and 4."
Explanation:

 Let's refer to the following lines of the passage:

The device has a very simple structure consisting of specially designed nanocomposite polymers and contact electrodes and can generate a

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Question : XYZ Ltd took over business of ABC Ltd. and paid for it by issue of 60,000, Equity Shares of Rs. 100 each at a par along with 6% Preference Shares of Rs. 1,00,00,000 at a premium of 5% and a cheque of Rs. 8,00,000.

Option 1: Rs. 1,68,00,000

Option 2: Rs. 1,73,00,000

Option 3: Rs. 1,40,00,000

Option 4: Rs. 1,60,00,000

Team Careers360 24th Jan, 2024

Correct Answer: Rs. 1,73,00,000


Solution : Answer = Rs. 1,73,00,000

Amount of Purchase Consideration will be

Equity share capital = 60,00,000

(60,000 shares @ 100 each)

6% preference 

Share Capital = 1,00,00,000 + 5,00,000 

= 105,00,000

Bank = 8,00,000

Total Purchase = 1,73,00,000
Hence, the correct option is 2.

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Question : Comprehension:
Read the given passage carefully and answer the questions that follow.
If you pay close attention to soap advertisements, you may hear of its pH value being claimed to be perfect for human skin. But is there really such a thing? Let's start at the beginning. pH (potential hydrogen) is defined as the concentration of hydrogen ions in a solution. pH values range between 0 and 14.7 is the neutral point, 0 being the most acidic and 14 being the most alkaline. More importantly, your skin isn't exactly pH 5.5; it falls in a range between 4.0 and 7.0, depending on diverse factors like the body part, age, genetics, ethnicity, and environmental conditions.

So, are products formulated at pH 5.5 perfect for skin? The short answer: not really! First, parameters like texture and other ingredients indicate a cleanser's quality, much better than pH alone. Second, though the skin pH rises slightly immediately after cleaning even with plain water, it reverts to its mild acidic pH in an hour. Healthy skin quickly rebalances the 'acid mantle' - a protective layer over the skin—and is unaffected in the long term by the cleanser's pH. Skin modulates pH, making skin products function optimally. So, why market pH 5.5 products as "perfect"? Well, for certain skin types (e.g., oily skin) and certain skin conditions (like acne), an increase in pH can aggravate these skin situations. This might lead to an interpretation that a skin care product needs to be at a pH for optimum cleansing. Hence, skincare experts have expressed reservations about pH being the sole criterion of product safety and 'acid mantle' preservation when factors including plain water may contribute to the same. Thus, an ideal product is almost impossible to define. So, look well beyond pH alone.

Question:
According to the passage, the pH value of human skin is generally:

Option 1: between 7 and 14

Option 2: 5.5

Option 3: between 0 and 7

Option 4: between 4 and 7

Team Careers360 24th Jan, 2024

Correct Answer: between 4 and 7


Solution : The correct choice is the fourth option.

Explanation: According to the passage, the pH value of human skin is generally in a range between 4.0 and 7.0, depending on various factors like body parts, age, genetics, ethnicity, and environmental conditions.

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Question : In the following passage, some blanks are given, and against each blank four alternative words are suggested. Choose the correct alternative to complete the passage in a meaningful way.

We know that ________________ (1) untreated waste from the industries and sewage which goes into the rivers will pollute them. But still the  industries and the local bodies do it anyway. We know our refutable thirst for coal or minerals like gold is ________________ (2) entire hills, contributing to the loss of biodiversity and affecting the people living working in this area and living there. Governments and corporations mine them anyway. There’s a word for such sustained, ________________ (3) actions that we perform despite knowing fully well their massive and widespread ecological and environmental fallouts: ecocide. It is, literally, ‘the ________________ (4) of the environment’.
Ecocide is the temr used for the actions that result in the intentional, conscious destruction of the natural environment with consequences for human, animal and plant life. That’s the ________________ (5) in which biologist Arthur Galston used the term for the first time in 1970, at the Conference on War and Responsibility in Washington, D.C. He pointed out the US’s use of Agent Orange – a herbicide used to ________________ (6) forest during the Vietnam War – an action of ecocide. Galston was the first to associate the willful destruction of nature with genocide, which is ________________ (7) as an international crime.

Q.Choose the correct word to be used in blank 2

Option 1: Ravaging
 

Option 2: Gainsaying
 

Option 3: Darting
 

Option 4: Ramifying

Team Careers360 24th Jan, 2024

Correct Answer: Ravaging
 


Solution : The correct answer is option 1.

Explanation:

Ravaging is the only word that will fit the blank and make the sentence coherent.

Ravaging: causing great harm and destruction.

Gainsaying: denying or contradicting (a fact or statement).

Darting: moving or running somewhere unexpectedly or quickly.

Ramifying:spread

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