Assertion (A): Metals are good reducing agents. Reason (R): Metals have a tendency to lose electrons.
A. A is false but R is true.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. Both A and R are true and R is the correct explanation of A.
Answer: Option D
Solution (By JKExamLibrary)
Metals have low ionization energies and a strong tendency to lose electrons (undergo oxidation). By losing electrons, they cause the reduction of other substances, making them excellent reducing agents. Both statements are true, and the tendency to lose electrons perfectly explains their role as reducing agents.
Explanation:
Ammonium ion (NH₄⁺) is formed when NH₃ donates its lone pair to H⁺, forming a coordinate (dative) bond. CH₄ and H₂O have ordinary covalent bonds; NaCl is ionic. In NH₄⁺, all four N–H bonds become equivalent.
Explanation:
Hydrogen has a very high calorific value of about 141.9 kJ/g (higher heating value) or ~150 kJ/g approximate. This makes it an excellent fuel, though storage is challenging. Methane ~55 kJ/g, petrol ~47 kJ/g. Hydrogen fuel cells use it efficiently.
Explanation:
Nitric acid (HNO₃) was called aqua fortis (strong water) due to its ability to dissolve metals like silver (except gold). Oil of vitriol is H₂SO₄; muriatic acid is HCl.
No comments yet. Be the first to start the discussion!