JEE Main · ChemistryHard
Which property of the alkali metals explains why they are kept in kerosene oil?
- A.They have low melting points.
- B.They are highly reactive towards moisture and oxygen in the air.
- C.They form explosive mixtures with nitrogen.
- D.They have high density compared to kerosene.
Show correct answer & step-by-step solution
Correct answer: B — They are highly reactive towards moisture and oxygen in the air.
Solution
- Alkali metals have very low ionization enthalpies, making them highly electropositive.
- They react vigorously with atmospheric oxygen to form oxides and with moisture to form hydroxides and hydrogen gas.
- Kerosene acts as an inert medium to prevent contact with air and moisture.
- Hence the answer is (B).
Attempt this question & track your score
Sign up free to answer, get instant scoring, and let SolveGini track which Chemistry topics you need to revise.
Attempt & Track Free →More s-Block Elements practice questions
- What is the product formed when sodium metal reacts with excess oxygen?
- Which alkaline earth metal hydroxide is the most soluble in water?
- Which element among the alkaline earth metals is the most reactive?
- Which of the following alkali metal carbonates is thermally unstable and decomposes upon heating?
- Which of the following compounds is known as soda ash?
- Which of the following alkali metal salts is the most soluble in water?
- Which of the following compounds is used in the Solvay process for the manufacture of sodium carbonate?
- What is the product formed when sodium metal reacts with excess oxygen at high temperature?
- Which alkaline earth metal carbonate is the most thermally stable?
- Which alkaline earth metal does not impart a characteristic color to the Bunsen flame?
- Which of the following statements regarding the solubility and thermal stability of alkaline earth metal carbonates is c
- What is the correct order of the ionic radii of the following ions?