The correct option is (A). Regions like Jammu and Kashmir, Andhra Pradesh, and Kerala mainly have forests classified as reserved or protected. These forests are maintained by government authorities to ensure biodiversity conservation, prevent deforestation, and promote sustainable management of ...
Category: Class 10 Science
NCERT Solutions for Class 10 Science and important questions for CBSE class 10 for session 2020-2021
Discussion Forum Latest Questions
The correct option is (C). Resource development benefits overall progress only when supported by technological advancements and proper institutional systems. Technology ensures efficient use of resources, while institutions promote fair distribution, sustainability, and innovation, leading to long-term economic and social ...
Correct option – B (I and III). Aluminium oxide and zinc oxide are amphoteric and react with both dilute HCl and aqueous NaOH. Calcium oxide is basic (reacts with acid) and SO₂ is acidic (reacts with base). cbse sample paper 2025 ...
Correct option – B. Iron nail in P (CuSO₄) undergoes displacement: copper ions reduced to copper metal, giving a brownish coating; in Q (AgNO₃) iron displaces silver, producing a silver coating on the nail during the reaction. cbse sample paper 2025 ...
Correct option – D. Sodium hydroxide. Among the options, NaOH is a strong, highly soluble base producing a high concentration of OH⁻ in solution; magnesium hydroxide is sparingly soluble and both acids give low pH values generally. cbse sample paper 2025 ...