MCQ
Basics of Everyday Science MCQ - Practice Questions with Answers
Solve 201 Basics of Everyday Science questions for RAS/RPSC preparation.
Practice questions
Q1India's first thorium-based reactor KAMINI is located at:
KAMINI (Kalpakkam Mini) at IGCAR, Kalpakkam is the world's only operating reactor fueled by Uranium-233 (bred from thorium). It is a 30 kW research reactor used for neutron radiography. It demonstrates Stage III technology of India's three-stage nuclear programme.
Q2Consider the following statements: 1. Ampere is the SI base unit of electric current. 2. Kelvin is the SI base unit of luminous intensity. 3. Mole is the SI base unit of amount of substance. 4. Joule is one of the seven SI base units. Which of the statements given above are correct?
Statement 1 is correct: ampere is the SI base unit for electric current. Statement 2 is incorrect: kelvin is the SI base unit for thermodynamic temperature, while candela is for luminous intensity. Statement 3 is correct: mole is the SI base unit for amount of substance. Statement 4 is incorrect: joule is a derived SI unit, not one of the seven base units.
Q3The SI unit of luminous intensity is:
Candela (cd) is the SI base unit of luminous intensity. It measures the power emitted by a light source in a particular direction, weighted by the luminosity function. It is one of the seven SI base units along with metre, kilogram, second, ampere, kelvin, and mole.
Q4Consider the following statements: 1. A neutral solution has pH 7. 2. Values less than 7 on the pH scale represent a basic solution. 3. A neutralisation reaction between an acid and a base gives salt and water. 4. Bases generate hydrogen ions in aqueous solution, which are responsible for acidic properties. Which of the statements given above are correct?
Statement 1 is correct because neutral solutions have pH 7. Statement 2 is incorrect because pH below 7 indicates an acidic solution, not a basic one. Statement 3 is correct: acid-base neutralisation gives salt and water. Statement 4 is incorrect: acids produce hydrogen ions responsible for acidic properties; bases generate hydroxide ions.
Q5Consider the following statements: 1. The ozone layer is mainly found in the stratosphere at about 15-35 km altitude. 2. Optical fibres transmit light signals through total internal reflection. 3. A Geiger-Muller counter detects ionizing radiation such as alpha, beta and gamma rays. 4. Heavy water contains regular hydrogen instead of deuterium and is therefore lighter than normal water. Which of the statements given above are correct?
Statement 1 is correct because the ozone layer is primarily in the stratosphere at roughly 15-35 km. Statement 2 is correct because optical fibre communication uses total internal reflection to transmit light with low loss. Statement 3 is correct because a Geiger-Muller counter detects ionizing radiation including alpha, beta and gamma rays. Statement 4 is incorrect because heavy water contains deuterium instead of regular hydrogen and is about 11 percent heavier than normal water.
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6Consider the following statements: 1. 3D printing is also known as additive manufacturing. 2. 3D printing builds objects layer by layer from digital designs. 3. Noise pollution is measured in decibels. Which of the statements given above are correct?
7Consider the following statements: 1. The International System of Units has seven base units. 2. The ampere is the SI base unit of electric current. 3. The kelvin is the SI base unit of luminous intensity. 4. Derived SI units include units for area, volume and velocity. Which of the statements given above are correct?
8Consider the following statements: 1. A barometer is used to measure atmospheric pressure. 2. A seismograph detects and records ground motion caused by seismic waves. 3. Control rods in a nuclear reactor absorb protons to regulate the fission chain reaction. Which of the statements given above are correct?
9The Nobel Prize in Physics 2025 was awarded for the discovery of macroscopic quantum mechanical tunnelling and energy quantisation in which system?
10Consider the following statements: 1. The pH scale used for acids and bases is commonly described from 0 to 14. 2. A solution with pH more than 7 is acidic. 3. Calcium and magnesium compounds are important causes of water hardness. 4. A neutral solution has pH exactly 10. Which of the statements given above are correct?
11The February 17 annular solar eclipse was visible from which region?
12A seismograph is used to:
13The total lunar eclipse of March 3, 2026, had a magnitude of:
14Consider the following statements: 1. The SI base unit of electric current is ampere. 2. The SI base unit of temperature is kelvin. 3. A barometer is used to measure relative humidity. Which of the statements given above are correct?
15Consider the following statements: 1. Tungsten is used in incandescent bulb filaments because it has a very high melting point. 2. Diamond is the hardest naturally occurring substance and is rated 10 on the Mohs scale. 3. Ozone is an allotrope of carbon, like diamond and graphite. Which of the statements given above are correct?