Science Quiz: Day: 115

September 26, 2022

If someone in the family is suffering from a problem of acidity after overeating, which of the following would you suggest as a remedy?

(A) Lemon juice
(B) Vinegar
(C) Baking soda solution
(D) Both (a) and (b)

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Answer – C

With reference to Dry Ice, consider the following statements:
1. It is the solid form of carbon dioxide.
2. It is used primarily as a cooling agent.
3. It has a lower temperature than that of water ice and does not leave any residue.
Which of the statements given above is/are correct?

(A) 2 and 3 only
(B) 1, 2 and 3
(C) 1 and 3 only
(D) 2 only

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Answer – B

Which of the following is/are correct with reference to Adenosine triphosphate (ATP)?
1. It is produced during the process of cellular respiration.
2. It provides the energy needed to drive the endothermic reactions in the cell.
Select the correct answer using the code given below.

(A) 1 only
(B) 2 only
(C) Both 1 and 2
(D) Neither 1 nor 2

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Answer – C

Which of the following best describes reverse zoonotic event?

(A) A disease being transmitted from animals to humans
(B) It is a situation in which disease transmit from one animal species to other
(C) It is a situation where pathogens transmit from humans to animals.
(D) None of the above

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Answer – C

Nitrogen gas is used in the tyres of an airplane because

(A) Nitrogen gas is inert unlike air
(B) It is heavier than air
(C) It forms liquid only below a very low temperature
(D) Both (a) and (c)

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Answer – D

Aircraft tires are filled with nitrogen because nitrogen gas is mostly inert, meaning that it requires more energy to react with other substances. This is important because, at elevated temperatures, oxygen can react with rubber. Oxidized rubber is weaker than non-oxidized rubber, and weaker tires are not preferred.
Air has certain moisture content and it is generally very hard to remove this moisture.If an airplane tires were filled with air, at the flight altitude ice would form inside the tires since the temperature up there is about -30 degrees F. Landing with a chunk of ice in the tire would make it out of balance and change the tire pressure. Tires would probably burst.
On the other hand, nitrogen doesn’t form a liquid till -173C and pure nitrogen has almost no moisture.
Nitrogen being lighter than air does not play a part in it being used in the airplane tyres. Hence option (d) is the correct answer.

A person stands on loose sand and then lies down on it. He goes deeper into the sand while standing than while lying down . Which one of the following is the reason?

(A) The weight of the body is lesser while standing up.
(B) The density of the human body is lesser than sand
(C) The pressure on the sand is higher while standing up
(D) There is more friction between the body and the sand while lying down

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Answer – C

The color of the sun appears reddish during sunset. Which of the following is the reason behind this phenomenon?

(A) Absorption of light rays by the atmosphere
(B) Human eyes are not sensitive to other colors during that part of the day
(C) Scattering of light rays by atmospheric particles
(D) The sun emits different wavelengths of light during different times of the day

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Answer – C

Hyperspectral imaging is an imaging technique in which electromagnetic radiations of different frequencies can be captured. Which of the following is/are well- known applications of hyperspectral imaging?
1. Identification of tree species within a forest
2. Mineral exploration
3. Detection of bats by converting very high-frequency signals into low- frequency signals
Select the correct answer using the code given below.

(A) 1 and 2 only
(B) 2 only
(C) 1, 2 and 3
(D) 1 only

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Answer – A

Bat detectors use sound frequency converters to convert the ultrasound frequencies into audible frequencies.
They do not use hyperspectral imaging.

Which of the following best describes an Internet Cookie?

(A) It is a warning displayed on a webpage that cautions viewers against the contents of the webpage.
(B) It is any advertisement on a webpage that charges viewers when they click on it.
(C) It is a message given to a web browser intended to better guide the viewers through customization of webpages.
(D) It is a highlighted text on a webpage which can lead viewers to another webpage when they click on it.

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Answer – C

Consider the following statements regarding virtual reality (VR) and augmented reality(AR) :
1. The real and virtual objects cannot be distinguished in VR whereas they can be distinguished in AR.
2. Both VR and AR can be viewed by users wearing special glasses only.
Which of the statements given above is/are correct?

(A) 1 only
(B) 2 only
(C) Both 1 and 2
(D) Neither 1 nor 2

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Answer – A