ONLINE TPSC · READING MODE

Science

Enable JavaScript for interactive practice, saved questions, and progress tracking.

Questions from the existing database. Please report any answers that need review.

Question 758

Mesons are found in

ALaser beam

BX-ray

CGamma rays

DCosmic rays

Show answer

D. Cosmic raysExplanation: Mesons are subatomic particles found in cosmic rays. They are unstable particles composed of one quark and one antiquark, making them part of the hadron family. Mesons are produced when high-energy cosmic rays from outer space collide with atoms in the Earth's atmosphere. These collisions generate a variety of secondary particles, including pions and kaons (types of mesons). Mesons have very short lifespans and quickly decay into other particles such as muons and neutrinos.

Question 757

Nuclear fission is caused by the impact of

ANeutron

BProton

CDeuteron

DElectron

Show answer

A. NeutronExplanation: Nuclear fission is the process in which the nucleus of a heavy atom, such as Uranium-235 or Plutonium-239, splits into two or more lighter nuclei when bombarded by a slow-moving neutron. This reaction releases a large amount of energy, along with additional neutrons that can trigger further fission reactions—leading to a chain reaction. This principle is used in nuclear reactors for power generation and in atomic bombs for explosive energy release.

Question 752

'Beans' is associated with computer programming language :

AC++

BJava

CCOBOL

DPASCAL

Show answer

B. JavaExplanation: In computer programming, the term "Beans" is specifically associated with the Java programming language. A JavaBean is a reusable software component written in Java that can be manipulated visually in a builder tool. JavaBeans follow certain conventions such as having a no-argument constructor, providing getter and setter methods, and being serializable. They are widely used in Enterprise Java applications for data encapsulation and to promote modular, reusable code.

Question 730

Who was the first Indian to go into space ?

ARavi Malhotra

BSatish Dhawan

CRakesh Sharma

DKalpana Chawla

Show answer

C. Rakesh SharmaExplanation: Rakesh Sharma was the first Indian astronaut to travel into space. He flew aboard the Soviet spacecraft Soyuz T-11 on April 3, 1984, as part of a joint mission between ISRO (Indian Space Research Organisation) and the Soviet Intercosmos program. During his space mission, he spent about 8 days aboard the Salyut-7 space station. When asked by then Prime Minister Indira Gandhi how India looked from space, he famously replied, “Saare Jahan Se Achha.”

Question 702

Ozone layer is situated in the upper regions of

ATroposphere

BStratosphere

CMagnetosphere

DMesosphere

Show answer

B. StratosphereExplanation: The ozone layer is located in the stratosphere, which is the second layer of the Earth’s atmosphere, lying above the troposphere and extending from about 10 km to 50 km above the Earth’s surface. The ozone layer contains a high concentration of ozone gas (O₃), which absorbs most of the Sun’s harmful ultraviolet (UV) radiation. This protective shield prevents genetic damage, skin cancer, and other harmful effects on living organisms.

Question 685

The longest day in the southern Hemisphere is on :

A22nd December

B21st June

C21st March

D23rd September

Show answer

A. 22nd DecemberExplanation: The longest day in the Southern Hemisphere occurs on 22nd December, which marks the Summer Solstice in that hemisphere. On this date, the South Pole is tilted toward the Sun, resulting in longer daylight hours and shorter nights. Conversely, at the same time, the Northern Hemisphere experiences its winter solstice—the shortest day and longest night of the year. After 22nd December, the days in the Southern Hemisphere gradually begin to shorten.

Question 645

Acid rain is caused due to the pollution of environment by:

ACarbondioxide and Nitrogen

BCarbon monoxide and Carbondioxide

COzone and Methane

DSome oxide of Nitrogen and Sulpher

Show answer

D. Some oxide of Nitrogen and SulpherExplanation: Acid rain is caused by the presence of sulphur dioxide (SO₂) and nitrogen oxides (NOₓ) in the atmosphere. These gases are mainly released from the burning of coal, petroleum, and other fossil fuels in industries and vehicles. When they combine with water vapor and oxygen in the air, they form sulphuric acid (H₂SO₄) and nitric acid (HNO₃). These acids mix with rainwater and fall as acid rain, which damages soil, crops, aquatic life, and even monuments like the Taj Mahal.

Question 644

Dialysis is prescribed for patients having:

ALiver disease

BLung trouble

CKidney trouble

DHeart Disease

Show answer

C. Kidney troubleExplanation: Dialysis is a medical procedure prescribed for patients suffering from kidney failure or severe kidney disease. When the kidneys lose their ability to filter waste products, excess salts, and water from the blood, dialysis performs this function artificially. It helps maintain the body’s chemical balance and remove toxins such as urea and creatinine. There are two main types of dialysis: hemodialysis (using a dialysis machine and artificial kidney) and peritoneal dialysis (using the lining of the abdomen as a filter).

Question 643

Seismology is the science of :

AAtmosphere

BEarthquake

CFossil

DSilkworm breeding

Show answer

B. EarthquakeExplanation: Seismology is the branch of geophysics that deals with the study of earthquakes and the propagation of seismic waves through the Earth. Scientists who study earthquakes are called seismologists. Seismology helps in understanding the origin, intensity, and effects of earthquakes, as well as the internal structure of the Earth. The intensity of an earthquake is measured using instruments like the seismograph and scales such as the Richter scale or Moment Magnitude scale.

Question 642

The Bhopal Gas Tragedy was caused by :

APhosgen gas

BCarbon monoxide

CMethyl isocyanate

DChlorine

Show answer

C. Methyl isocyanateExplanation: The Bhopal Gas Tragedy occurred on the night of December 2–3, 1984, at the Union Carbide pesticide plant in Bhopal, Madhya Pradesh (India). The disaster was caused by the accidental leakage of Methyl Isocyanate (MIC), a highly toxic and reactive gas used in pesticide manufacturing. The poisonous gas spread rapidly over the nearby populated areas, killing thousands of people and causing severe respiratory and neurological disorders. It is considered one of the world’s worst industrial disasters.

Preparing your study space

Science

Mesons are found in

Nuclear fission is caused by the impact of

'Beans' is associated with computer programming language :

Who was the first Indian to go into space ?

Ozone layer is situated in the upper regions of

The longest day in the southern Hemisphere is on :

Acid rain is caused due to the pollution of environment by:

Dialysis is prescribed for patients having:

Seismology is the science of :

The Bhopal Gas Tragedy was caused by :

You have a session in progress.

A useful place to practise.

Your progress belongs to you.