Home RRB JE General Science Physics: Heat RRB JE · General Science
Physics: Heat Previous Year Questions 18 Physics: Heat (General Science) questions asked in RRB JE previous year papers, each with the correct answer and explanation. Read them free on UTpaper, or attempt the full papers as timed online tests.
18 questionsOfficial answer key Free Other General Science topics
Q1 RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM) When washing soda is exposed to hot atmosphere for a long time, it:
A gains water molecules and dissolves in them B gains heat from the Sun and becomes dry C loses water molecules and becomes powdery D loses water molecules but remains in crystal form Show answer Hide answer Correct answer: (C) loses water molecules and becomes powdery
Q2 RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM) Which of the following factors is primarily responsible for survival of species?
A Temperature B Niche C Variations D Mutation Show answer Hide answer Correct answer: (C) Variations
Q3 RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM) Which of the following statements is true about the physical properties of compounds in a homologous series?
A They have identical melting and boiling points. B Their boiling points decrease as the number of carbon atoms increase. C They have a regular change in melting and boiling points. D Their physical properties do not change. Show answer Hide answer Correct answer: (C) They have a regular change in melting and boiling points.
Q4 RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM) Covalent molecules have low melting and boiling point because:
A they are generally gaseous in nature B they have weak intermolecular forces C they have strong bonds within the molecule D they have strong electrostatic intermolecular forces Show answer Hide answer Correct answer: (B) they have weak intermolecular forces
Q5 RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM) Why is the depletion of the ozone layer a concern for humans?
A It leads to increased water pollution. B It protects us from harmful radiation. C It increases soil fertility. D It promotes plant growth. Show answer Hide answer Correct answer: (B) It protects us from harmful radiation.
Q6 RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM) What determines the sex of a child in humans?
A Environmental cues B The temperature at which fertilised eggs are placed C The fate of the embryo D Genetic constitution Show answer Hide answer Correct answer: (D) Genetic constitution
Q7 RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM) Why are sulphide ores usually converted into oxides before the extraction of metals?
A Metal sulphides react faster with carbon B Sulphide ores are unstable at room temperature C Sulphide ores contain more gangue materials D Metal oxides are easier to reduce than sulphides Show answer Hide answer Correct answer: (D) Metal oxides are easier to reduce than sulphides
Q8 RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM) Why does our palm feel cold when acetone or petrol is poured on it?
A The liquid blocks heat flow from surroundings B The liquid increases moisture on skin surface C The liquid absorbs heat from the skin to evaporate D The liquid reacts chemically with our skin surface Show answer Hide answer Correct answer: (C) The liquid absorbs heat from the skin to evaporate
Q9 RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM) Why are metals such as sodium and calcium extracted by electrolytic reduction instead
of heating with carbon?
A They decompose when heated with carbon B They have greater affinity for oxygen than carbon C They exist only as molten chlorides in nature D They form unstable oxides at high temperature Show answer Hide answer Correct answer: (B) They have greater affinity for oxygen than carbon
Q10 RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM) Why is alcohol considered a cleaner fuel than petrol?
A It produces less smoke B It burns at low temperature C It burns without oxygen D It gives higher energy Show answer Hide answer Correct answer: (A) It produces less smoke
Q11 RRB JE CBT-1, 20 Feb 2026, Shift 3 (4:30 PM) Which statement accurately describes how energy transforms during the free fall of an
object under gravity?
A Both potential and kinetic energies remain constant. B Potential energy and kinetic energy both decrease. C Potential energy is converted into heat energy during the fall. D Potential energy decreases while kinetic energy increases, maintaining constant total mechanical energy. Show answer Hide answer Correct answer: (D) Potential energy decreases while kinetic energy increases, maintaining constant total mechanical energy.
Q12 RRB JE CBT-1, 20 Feb 2026, Shift 2 (12:45 PM) Which international agreement aims to limit global temperature rise below 2°C?
A Paris Agreement B Montreal Protocol C Kyoto Protocol D Rio Declaration Show answer Hide answer Correct answer: (A) Paris Agreement
Q13 RRB JE CBT-1, 20 Feb 2026, Shift 2 (12:45 PM) Which of the following statements is correct regarding the storage of grains?
A Abiotic factors responsible for losses in stored grains are temperature, rodents and fungi. B Biotic factors responsible for losses in stored grains are insects, rodents and moisture. C Biotic factors responsible for losses in stored grains are insects, rodents and fungi. D Storage losses in agriculture produce can be very low. Show answer Hide answer Correct answer: (C) Biotic factors responsible for losses in stored grains are insects, rodents and fungi.
Q14 RRB JE CBT-1, 20 Feb 2026, Shift 1 (9:00 AM) Which change will promote micelle formation in a detergent solution?
A Increasing detergent concentration above Critical Micelle Concentration(CMC) B Lowering the temperature below Kraft point C Adding more water to dilute the solution D Decreasing detergent concentration below Critical Micelle Concentration(CMC) Show answer Hide answer Correct answer: (A) Increasing detergent concentration above Critical Micelle Concentration(CMC)
Q15 RRB JE CBT-1, 20 Feb 2026, Shift 1 (9:00 AM) Why are non-biodegradable substances harmful for the environment?
A Can be broken down by bacteria B Needs heat and temperature for breakdown, releases harmful chemicals C Causes no pollution in water D Easily mixes with soil Show answer Hide answer Correct answer: (B) Needs heat and temperature for breakdown, releases harmful chemicals
Q16 RRB JE CBT-1, 19 Feb 2026, Shift 3 (4:30 PM) A bright metal turns dull over time due to oxidation. What is this process called?
A Corrosion B Sublimation C Filtration D Evaporation Show answer Hide answer Correct answer: (A) Corrosion
Q17 RRB JE CBT-1, 19 Feb 2026, Shift 3 (4:30 PM) Why does the temperature remain constant during melting of ice even on heating?
A Heat energy converts directly into work B Heat energy escapes from ice into the surroundings C Heat energy increases kinetic energy instantly D Heat energy is used to overcome particle attraction Show answer Hide answer Correct answer: (D) Heat energy is used to overcome particle attraction
Q18 RRB JE CBT-1, 19 Feb 2026, Shift 3 (4:30 PM) Which metal releases the most heat when reacting with excess hydrochloric acid?
A Iron B Nickel C Zinc D Magnesium Show answer Hide answer Correct answer: (D) Magnesium
How to use these RRB JE General Science questions Every question here was asked in a real RRB JE paper; the paper and shift are shown on the card, and the number opens the question on its own page. Try each one before tapping Show answer, then attempt the full RRB JE papers as timed tests to check your speed under exam conditions.
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