Balance the chemical equation: a Fe + b H₂O → c Fe₃O₄ + d H₂. The values of a, b, c, and d are:
A. 4, 3, 1, 4
B. 1, 3, 4, 3
C. 3, 4, 1, 4
D. 3, 1, 4, 4
Answer: Option C
Solution (By JKSSB Mock Tests)
To balance the equation: Fe atoms: 3 on right, so a=3. O atoms: 4 on right, so b=4. H atoms: 4*2=8 on left, so d=4. The balanced equation is 3Fe + 4H₂O → Fe₃O₄ + 4H₂. Thus, a=3, b=4, c=1, d=4. This ensures the law of conservation of mass is obeyed.
Explanation:
Smelting is the pyrometallurgical process of extracting a metal from its ore by heating it beyond its melting point and reducing the metal oxide with a carbonaceous reducing agent (like coke or coal). Flux is often added to remove impurities as slag. Calcination and roasting are oxidation processes.
Explanation:
In PH₃, phosphorus forms three covalent bonds with three hydrogen atoms, so its valency is 3. It has one lone pair. Its electronic configuration is 2,8,5; shares three electrons.
Explanation:
CH₄ + 2O₂ → CO₂ + 2H₂O + heat. Complete combustion of any hydrocarbon with sufficient oxygen always produces carbon dioxide and water. Incomplete combustion due to limited oxygen produces carbon monoxide (CO) and/or soot (carbon particles). Methane is the main component of natural gas and biogas. CO is a poisonous gas. The combustion of alkanes is highly exothermic.
No comments yet. Be the first to start the discussion!