Chemistry - MOST IMPORTANT RRB Ministerial & Isolated Categories Previous Year Questions
Practice real questions from previous year exams of RRB Ministerial & Isolated Categories.
📘 Phase Changing Processes and Their Factors📚 Melting
Q1
Which of the following statements are correct?
(i) Melting point indicates the strength of forces of attraction between particles.
(ii) During melting, temperature of the solid remains constant until it has completely melted.
(iii) Boiling is a surface phenomenon.
(iv) Steam at 373 K has more energy than water at 373 K.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Units of Concentration of Solution📚 Misc
Q2
Which of the following are the ways of expressing the concentration of a solution?
i. Mass by mass percentage of a solution
ii. Mass by volume percentage of a solution
iii. Volume by volume percentage of a solution
🎯 RRB Ministrial & Isolated Categories 2025
📘 Organic Chemistry📚 Hydrocarbons
Q3
Given below are the two statements. Select the correct answer for these statements.
Statement I: Saturated hydrocarbons are highly reactive with most reagents.
Statement II: Substitution reactions in alkanes occur in the presence of sunlight or UV light.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Metallurgy📚 General Facts
Q4
Given below are two statements. Select the correct answer from the options given for these statements.
Statement I: Metals low in the activity series can be obtained from their oxides without using any reducing agent.
Statement II: Heating alone is enough to reduce the oxides of these metals to pure metal.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Atomic Models📚 Thomson's Atomic Model
Q5
Which of the following statements about Thomson's model are correct?
i. Atoms consist of a positively charged sphere.
ii. Electrons are randomly moving outside the sphere.
iii. The number of positive and negative charges is equal.
iv. The atom is overall neutral.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Acids, Bases and Salts📚 Types of Salts -Acidic, Basic, etc.
Q6
Which pair of salts is most likely to show NO change in either red or blue litmus paper?
🎯 RRB Ministrial & Isolated Categories 2025
📘 Phase Changing Processes and Their Factors📚 Evaporation
Q7
Which of the following are examples from daily life where we feel cooling due to evaporation?
i. Sweating in summer
ii. Blowing air on hot tea or coffee
iii. Earthen pot (matka) cooling water
🎯 RRB Ministrial & Isolated Categories 2025
📘 Laws of Chemical Combinations📚 Laws of Conservation of Mass
Q8
Which of the following statements are correct?
1. The Law of Constant Proportions is also called the Law of Definite Proportions.
2. In water, the mass ratio of hydrogen to oxygen is always 1 : 8.
3. Dalton's Atomic Theory explained both the Law of Conservation of Mass and the Law of Definite Proportions.
4. In ammonia, nitrogen and hydrogen are always present in the ratio 8 : 1 by mass.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Environmental Chemistry📚 Misc
Q9
Which of the following processes in the nitrogen cycle converts atmospheric nitrogen (N 2 ) into usable forms like ammonia (NH 3 )?
🎯 RRB Ministrial & Isolated Categories 2025
📘 Physical States of Matter and Their properties📚 Solid
Q10
Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).
Assertion (A): A rubber band is a solid because it regains its original shape when the stretching force is removed.
Reason (R): Solids are rigid and have negligible compressibility.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Solution📚 Colloid and its types
Q11
Select the option that is true regarding the following two statements labelled Statement (I) and Statement (II).
Statement I: The particles of a colloid are uniformly spread throughout the solution.
Statement II: A colloidal solution is a heterogeneous mixture, for example, milk.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Classification of Matter on the basis of Chemical Properties- I📚 Mixture (Impure substance)- Homogeneous and Heterogeneous
Q12
Which of the following are homogeneous mixtures?
i. Salt in water
ii. Sugar in water
iii. Oil and water
iv. Copper sulphate in water
🎯 RRB Ministrial & Isolated Categories 2025
📘 Classification of Matter on the basis of Chemical Properties- I📚 Pure Substance- Compound
Q13
Two statements are given below. One is Assertion (A) and the other is Reason (R). Choose the correct answer from the options given for these statements.
Assertion (A): Properties of a compound are different from those of its constituent elements.
Reason (R): Compounds are formed by chemical combination of elements in a fixed ratio.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Chemical Reactions📚 Single Displacement Reaction
Q14
Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).
Assertion (A): Copper wire in iron sulphate solution shows no visible reaction.
Reason (R): Copper is less reactive than iron.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Organic Chemistry📚 Hydrocarbons
Q15
Identify the correct match between the compound and type of carbon-carbon bond.
Column I (Compound): (i) Ethane, (ii) Ethene, (iii) Ethyne
Column II (C-C bond type): (a) Double bond, (b) Single bond, (c) Triple bond
🎯 RRB Ministrial & Isolated Categories 2025
📘 Chemical Reactions📚 Double Displacement Reaction
Q16
Which of the following is/are NOT product(s) of the reaction between sodium sulphate and barium chloride?
i. BaSO4
ii. NaCl
iii. Na2SO4
🎯 RRB Ministrial & Isolated Categories 2025
📘 Acids, Bases and Salts📚 Types of Indicators- Natural, Synthetic and Olfactory Indicators
Q17
Match the following.
Column I (Substance): 1. Phenolphthalein in NaOH, 2. CaCO3 + dilute acid, 3. Neutralization reaction
Column II (Observation): a. CO2 gas evolves, b. Pink colour, c. Salt + water
🎯 RRB Ministrial & Isolated Categories 2025
📘 Refining of Metals📚 Electrolytic refining
Q18
Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).
Assertion (A): In electrolytic refining, insoluble impurities settle down at the bottom of the anode.
Reason(R): These impurities do not dissolve in the electrolyte.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Phase Changing Processes and Their Factors📚 Sublimation
Q19
Which of the following statements are correct?
(i) Solid CO2 is called dry ice.
(ii) Solid CO2 changes directly into gas at 1 atm pressure.
(iii) Pressure and temperature can change the state of matter.
(iv) Solid CO2 melts into liquid CO2 before becoming gas.
🎯 RRB Ministrial & Isolated Categories 2025
📘 Chemistry in Everyday Life📚 Common Gases used in daily life (LPG, CNG, etc.)
Q20
Which of the following are compressed gases commonly used in daily life?
(i) LPG for cooking
(ii) Oxygen in hospitals
(iii) CNG in vehicles
(iv) Water in bottles
🎯 RRB Ministrial & Isolated Categories 2025