On account of the disruption in education due to the corona pandemic, we're opening up our platform for teachers, free of cost. Know More →

SSC > Science and Technology

Explore popular questions from Science and Technology for SSC. This collection covers Science and Technology previous year SSC questions hand picked by experienced teachers.

Q 1.

Correct2

Incorrect-0.5

The colour of the star is an indication of its

A

Distance from the earth

B

Distance from the sun

Temperature

D

Luminosity

Explanation

The colour of the star is an indication of its temperature. The glowing is caused by something called Black-Body radiation, which has to do with the heat energy trying to radiate away in more and more energetic wavelengths. Red stars are relatively cool at only a few thousand degrees Celsius, white stars are hot at about ten thousand degrees, and blue stars are the hottest.

Q 2.

Correct2

Incorrect-0.5

The planet nearest to the sun is

Mercury

B

Earth

C

Venus

D

Pluto

Explanation

The planet nearest to the sun is mercury. Mercury is the smallest and closest to the Sun of the eight planets in the Solar System, with an orbital period of about 88 Earth days.

Q 3.

Correct2

Incorrect-0.5

The group of stars arranged in a definite pattern is called

A

Milky way

Constellation

C

Andromeda

D

Solar system

Explanation

The group of stars arranged in a definite pattern is called constellation. In modem astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, which are patterns formed by prominent stars within apparent proximity to one another on Earth's night sky.

Q 4.

Correct2

Incorrect-0.5

The Asteroid belt is found between which of the following?

A

Earth and Mars

B

Jupiter and Saturn

Mars and Jupiter

D

Saturn and Uranus

Explanation

The Asteroid belt is found between Mars and Jupiter. The large majority of known asteroids orbit in the asteroid belt between the orbits of Mars and Jupiter, or are co-orbital with Jupiter.

Q 5.

Correct2

Incorrect-0.5

Which one of the following is the largest satellite in solar system?

Ganymede

B

Titan

C

Europa

D

Triton

Explanation

Ganymede is the largest satellite in solar system. Ganymede is a satellite of Jupiter and the largest moon in the Solar System. It is the seventh moon and third Galilean satellite outward from Jupiter. Completing an orbit in roughly seven days, Ganymede participates in a 1:2:4 orbital resonance with the moons Europa and Io, respectively. It has a diameter of 5,268 km (3,273 mi), 8% larger than that of the planet Mercury, but has only 45% of the latter's mass.

Q 6.

Correct2

Incorrect-0.5

Methane is present in the atmosphere of

A

Moon

B

Sun

Jupiter

D

Mars

Explanation

Methane is present in the atmosphere of Jupiter. The atmosphere of Jupiter is the largest planetary atmosphere in the Solar System. It is mostly made of molecular hydrogen and helium in roughly solar proportions; other chemical compounds are present only in small amounts and include methane, ammonia, hydrogen sulphide and water.

Q 7.

Correct2

Incorrect-0.5

Which planet takes the longest time to go around the sun?

A

Earth

B

Jupiter

C

Uranus

Neptune

Explanation

Neptune takes the longest time to go around the sun. Neptune orbits the Sun at an average distance of 4.5 billion km. Like all the planets in the Solar System, Neptune follows an elliptical path around the Sun, varying its distance to the Sun at different points along its orbit.

Q 8.

Correct2

Incorrect-0.5

The principle of Black hole was enunciated by

A

C.V. Raman

B

H.J. Bhabha

S. Chandrashekhar

D

H. Khurana

Explanation

The principle of Black hole was enunciated by S. Chandrashekhar. A Black Hole is a region of space-time from which gravity prevents anything, including light, from escaping. The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole, there is a mathematically defined surface called an event horizon that marks the point of no return. The hole is called “black” because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics.

Q 9.

Correct2

Incorrect-0.5

The planet which is called twin sister of the Earth is

A

Mercury

Venus

C

Mars

D

Uranus

Explanation

The planet which is called twin sister of earth is Venus. Venus is known as the Earth's twin because of its similar size, chemical composition and density. However, due to its toxic atmosphere, Venus is not habitable.

Q 10.

Correct2

Incorrect-0.5

Who discovered the solar system?

A

Aryabhatta

B

Newton

Copernicus

D

Kepler

Explanation

Copernicus discovered the solar system. Nicolaus Copernicus was a Renaissance mathematician and astronomer who formulated a heliocentric model of the universe which placed the Sun, rather than the Earth, at the center.

Q 11.

Correct2

Incorrect-0.5

Which of the following planets is smaller in size than the Earth?

Venus

B

Uranus

C

Saturn

D

Neptune

Explanation

Venus is smaller in size than the Earth. Diameter of earth is12,742 km while that of Venus is12,100 km

Q 12.

Correct2

Incorrect-0.5

Time taken by Sun's light to reach Earth is

8 min 18 sec

B

9 min

C

9 min 18 sec

D

6 min 18 sec

Q 13.

Correct2

Incorrect-0.5

Time taken by Moon's light to reach Earth is

A

58 sec

1.34 sec

C

1.58 sec

D

2.32 sec

Q 14.

Correct2

Incorrect-0.5

Space between Earth and Moon is known as

Cislunar

B

Fulalunar

C

Nebula

D

None of these

Explanation

Space between Earth and Moon is known as Cislunar. Pertaining to the space between the earth and the orbit of the moon.

Q 15.

Correct2

Incorrect-0.5

Which of the following does not belong to solar system?

A

Asteroids

B

Comets

C

Planets

Nebulae

Q 16.

Correct2

Incorrect-0.5

Which one of the following planets is nearest to the earth?

A

Mercury

Venus

C

Mars

D

Uranus

Q 17.

Correct2

Incorrect-0.5

Which one of the following conditions is most relevant for the presence of life on mars?

A

Atmospheric composition

B

Thermal conditions

Occurrence of ice cap and frozen water

D

Occurrence of ozone

Q 18.

Correct2

Incorrect-0.5

Among the following which planet takes maximum time for one revolution around the sun?

A

Earth

Jupiter

C

Mars

D

Venus

Explanation

Jupiter takes maximum time for one revolution around the sun. Jupiter revolves or orbits around the Sun once every 11.86 Earth years, or once every 4,330.6 Earth days. Jupiter travels at an average speed of 29,236 miles.

Q 19.

Correct2

Incorrect-0.5

Which planet is called "Evening star"?

A

Mars

B

Jupiter

Venus

D

Saturn

Explanation

Venus is called the Evening star. Because it trails the Sun in the sky and brightens into view immediately after the Sun sets and when the sky is dark enough. When Venus is at its brightest, it appears visible merely minutes after the Sun has set.

Q 20.

Correct2

Incorrect-0.5

The Earth becomes minimum distance from the sun?

3rd January

B

4th July

C

22nd March

D

21st September

Explanation

The Earth shows minimum distance from the Sun on 3rd January.

Q 21.

Correct2

Incorrect-0.5

Which planet is surrounded by ring?

Saturn

B

Mars

C

Venus

D

Earth

Explanation

Saturn is surrounded by ring. Saturn has a ring around it because it is believed to be very big and has lots of moons, meaning it has a strong pull of gravity. Another major reason is that the asteroids fling into its orbit and the rings are not solid.

Q 22.

Correct2

Incorrect-0.5

Lunar eclipse occurs

A

When moon lies between earth and sun

When earth lies between sun and moon

C

When sun lies between earth and moon

D

None of these

Q 23.

Correct2

Incorrect-0.5

By how much degree the earth is inclined on its own Axis

231/2

B

661/2

C

241/2

D

691/2

Q 24.

Correct2

Incorrect-0.5

On the surface of the moon

A

the mass of an object is more but it weighs lesser

B

the mass and weight both remain unchanged

the mass is the same but the weight is lesser

D

the mass is more but the weight is lesser

Q 25.

Correct2

Incorrect-0.5

To a space traveller on moon, the sky in day appears

A

white

black

C

blue

D

red