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General Science MCQ practice free online · page 30

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291UPSC2000General ScienceEnglish
Assertion (A): In a motion picture, usually 24 frames are projected every second over the whole length of the film. Reason (R): An image formed on the retina of eye persists for about 0.1s after the removal of the stimulus.
Show answerAnswer & explanation
Correct option: C — (A) is true, but (R) is false
292UPSC2007General ScienceEnglish
Consider the following statements. 1. If magenta and yellow coloured circles intersect, the intersected area will have a red colour. 2. If cyan and magenta coloured circles intersect, the intersected area will have a blue colour. Which of the statements given above is/are correct?
Show answerAnswer & explanation
Correct option: C — Both 1 and 2
293TNPSC2016General ScienceEnglish
Assertion (A): In the visible spectrum of light, red light is more energetic than green light. Reason (R): The wavelength of red light is more than that of green light.
Show answerAnswer & explanation
Correct option: D — (A) is false, but (R) is true
294Kerala PSC2015General ScienceEnglish
Assertion (A): The danger signal is made up of red colour. Reason (R): Red colour is scattered the least. Select the correct answer using the codes given below.
Show answerAnswer & explanation
Correct option: A — Both (A) and (R) are true and (R) is the correct explanation of (A)
295TSPSC2014General ScienceEnglish
Consider the following statements. 1. The sky appears blue because of less scattering. 2. The main cause of seven colours of the rainbow is scattering of light. 3. At the time of Sunrise, the Sun appears red, due to scattering of light. From the following statements.
Show answerAnswer & explanation
Correct option: B — 1 and 3 are true
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296UPSC2000General ScienceEnglish
Assertion (A): Small glass beads fixed on traffic signals glow brightly when light falls upon them. Reason (R): Light is totally reflected when the angle of incidence exceeds a certain critical value and light travelling in a denser medium is reflected from a rarer medium.
Show answerAnswer & explanation
Correct option: A — Both (A) and (R) are true and (R) is the correct explanation of (A)
297UPSC2013General ScienceEnglish
Rainbow is produced when Sunlight falls on drops of rain, which of the following physical phenomena are responsible for this? 1. Dispersion 2. Refraction 3. Internal reflection Select the correct answer using the code given below.
Show answerAnswer & explanation
Correct option: D — All of the above
298UPSC2001General ScienceEnglish
Assertion (A): A stick is dipped in water in a slanting position. If observed sideways, the stick appears short and bent at the surface of the water. Reason (R): A light coming from the stick undergoes scattering from water molecules giving the stick a short and bent appearance.
Show answerAnswer & explanation
Correct option: C — (A) is true, but (R) is false
299UPSC1999General ScienceEnglish
Consider the following statements. 1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is. 2. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is. Which of the above statements is/ are correct?
Show answerAnswer & explanation
Correct option: A — 1 and 2
300UKPSC2010General ScienceEnglish
The heat required in calories to convert one gram of ice at 0ºC to steam at 100ºC is approximately
Show answerAnswer & explanation
Correct option: C — 720

General Science practice — common questions

Page 30 of this set has 10 questions on it.

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Where do these General Science MCQs come from?

They are taken from official past papers of Indian government recruitment exams such as RRB NTPC, RRB Group D and RRB JE, and each question keeps a reference to the exam it appeared in.

Are the questions available in Hindi?

Yes. Many papers are set in both languages, so a large share of these questions are available in Hindi. Use the language filter at the top of the page.

Do the questions show answers and explanations?

Every question shows the correct option. Where the source paper included a worked solution, the explanation is shown under "Show answer".

General Science MCQ practice free online · page 30

Assertion (A): In a motion picture, usually 24 frames are projected every second over the whole length of the film. Reason (R): An image formed on the retina of eye persists for about 0.1s after the removal of the stimulus.

Consider the following statements. 1. If magenta and yellow coloured circles intersect, the intersected area will have a red colour. 2. If cyan and magenta coloured circles intersect, the intersected area will have a blue colour. Which of the statements given above is/are correct?

Assertion (A): In the visible spectrum of light, red light is more energetic than green light. Reason (R): The wavelength of red light is more than that of green light.

Assertion (A): The danger signal is made up of red colour. Reason (R): Red colour is scattered the least. Select the correct answer using the codes given below.

Consider the following statements. 1. The sky appears blue because of less scattering. 2. The main cause of seven colours of the rainbow is scattering of light. 3. At the time of Sunrise, the Sun appears red, due to scattering of light. From the following statements.

Assertion (A): Small glass beads fixed on traffic signals glow brightly when light falls upon them. Reason (R): Light is totally reflected when the angle of incidence exceeds a certain critical value and light travelling in a denser medium is reflected from a rarer medium.

Rainbow is produced when Sunlight falls on drops of rain, which of the following physical phenomena are responsible for this? 1. Dispersion 2. Refraction 3. Internal reflection Select the correct answer using the code given below.

Assertion (A): A stick is dipped in water in a slanting position. If observed sideways, the stick appears short and bent at the surface of the water. Reason (R): A light coming from the stick undergoes scattering from water molecules giving the stick a short and bent appearance.

The heat required in calories to convert one gram of ice at 0ºC to steam at 100ºC is approximately

General Science practice — common questions