Tag: general knowledge

Quizzes (3615) Questions (119858)

Questions Related to general knowledge

Multiple choice general knowledge

Which river is declared as ” national river” ?

  1. Ganga

  2. Yamuna

  3. Cauveri

  4. Krishna
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Ganga (Ganges) was declared the National River of India in 2008 by the Prime Minister to help achieve the objectives of the Ganga Action Plan. Yamuna, Cauvery, and Krishna are major rivers but do not hold the 'National River' status.

Multiple choice general knowledge science & technology

light can travel with out any medium

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Light is an electromagnetic wave that can travel through vacuum without requiring any medium. Unlike mechanical waves such as sound, which need particles to propagate, light consists of oscillating electric and magnetic fields that are self-sustaining and can cross empty space.

Multiple choice general knowledge science & technology

if the sun were to disappear right now we woudnt know about it for 8 minutes because it takes 8 minutes

  1. to operate receiving equipment in dark

  2. for light to travel from sun to earth

  3. for the sun to disappear

  4. all of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Sun is approximately 150 million kilometers from Earth, and light travels at about 300,000 km/s. This distance takes light roughly 8 minutes to cross, so if the Sun disappeared instantly, we would continue seeing it and feeling its gravity for 8 minutes - the information about its disappearance couldn't reach us faster than light speed.

Multiple choice general knowledge science & technology

the color that an object appears to be depends on

  1. angle at which visible light reflects off the object

  2. use of additive than subtractive colors

  3. wavelengths of light that the object reflects

  4. speed with which visible light reaches it
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Objects appear colored because they absorb some wavelengths of visible light and reflect others. Our eyes detect the reflected wavelengths. A red apple looks red because it absorbs most wavelengths and reflects red light. White objects reflect all wavelengths, while black objects absorb most visible light.

Multiple choice general knowledge math & puzzles

My flight takes of at 2pm from a place at 18N 40E and landed 10 Hrs later at a place with coordinates 36N40W. What is the local time when my plane landed?

  1. 8.00 pm

  2. 6.00 pm

  3. 12.00 am

  4. 6.40 pm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The time difference between 40E and 40W is 80 degrees. Since 15 degrees = 1 hour, 80 degrees = 5 hours 20 minutes. Traveling west, you subtract time. Departure: 2 PM (40E). Local time at 40W then: 8:40 AM. Add 10 hours flight time: 6:40 PM.

Multiple choice general knowledge math & puzzles

The square of a two digit number is divided by half the number. After 36 is added to the quotient, this sum is then divided by 2. The digits of the resulting number are the same as those in the original number, but they are in reverse order. The ten's place of the original number is equal to twice the difference between its digits. What is the number?

  1. 45

  2. 36

  3. 46

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let the number be 10A + B. Following the operations: square it, divide by half (=multiply by 2), add 36, divide by 2. This gives 10A + B + 18, which equals the reverse 10B + A. Solving: A - B = -2, so B = A + 2. Given A = 2(B - A), we get 3A = 2B, substituting: 3A = 2(A + 2), giving A = 4, B = 6. The number is 46, and 46² ÷ 23 + 36 all divided by 2 = 64.