Environmental Science (EVS) – Part 4
Q1. Local rural environmental management in India is mainly the role of:
Correct Answer: B. Gram Panchayats
Q2. Matter is anything that has:
Correct Answer: A. Mass and occupies space
Q3. Which state of matter has a definite shape and a definite volume?
Correct Answer: A. Solid
Q4. Which state of matter has a definite volume but takes the shape of its container?
Correct Answer: B. Liquid
Q5. In which state of matter are particles farthest apart and easily compressed?
Correct Answer: C. Gas
Q6. The change of a solid directly into a gas without passing through liquid state is called:
Correct Answer: B. Sublimation
Q7. Which of the following is an example of a sublimating substance?
Correct Answer: C. Camphor
Q8. Which of the following is a physical change?
Correct Answer: C. Melting of ice
Q9. Which of the following is a chemical change?
Correct Answer: C. Rusting of iron
Q10. The temperature at which a solid changes into a liquid is called its:
Correct Answer: C. Melting point
Q11. At standard atmospheric pressure, water boils at:
Correct Answer: C. 100°C
Q12. The change of a liquid to gas at the surface, below boiling point, is called:
Correct Answer: B. Evaporation
Q13. In a chemical reaction, substances that react are called:
Correct Answer: B. Reactants
Q14. The law that states “mass is neither created nor destroyed in a chemical reaction” is the law of:
Correct Answer: B. Conservation of mass
Q15. The reaction 2Mg + O₂ → 2MgO is an example of:
Correct Answer: B. Combination reaction
Q16. The reaction CaCO₃ → CaO + CO₂ on heating is an example of:
Correct Answer: B. Decomposition
Q17. When zinc is added to copper sulphate solution, copper is displaced. This is a:
Correct Answer: C. Displacement reaction
Q18. Mixing solutions of Na₂SO₄ and BaCl₂ produces a white precipitate of:
Correct Answer: B. Barium sulphate
Q19. The burning of methane is represented as CH₄ + 2O₂ → ?
Correct Answer: B. CO₂ + 2H₂O
Q20. Rusting of iron is an example of which type of reaction?
Correct Answer: B. Oxidation
Q21. Which is NOT an indicator of a chemical change?
Correct Answer: C. Change in shape only
Q22. Combustion is a reaction in which a substance reacts with:
Correct Answer: C. Oxygen
Q23. In a redox reaction, the substance that loses electrons is said to be:
Correct Answer: B. Oxidised
Q24. A balanced chemical equation must have:
Correct Answer: B. Equal numbers of atoms of each element on both sides
Q25. The formation of water from 2H₂ + O₂ → 2H₂O is an example of:
Correct Answer: B. Combination
Q26. Reduction can be defined as:
Correct Answer: C. Loss of oxygen or gain of hydrogen