Question
Which of the following metals does not liberate hydrogen gas when reacted with cold water but does so with steam?
Solution
Magnesium reacts very slowly with cold water, and the reaction may not be observable at room temperature. However, when heated with steam, magnesium reacts more vigorously, forming magnesium oxide (MgO) and hydrogen gas (H ₂ ). Reaction with steam: Mg (s) + H ₂ O (g) → MgO (s) + H ₂  (g)
More Chemistry GS Questions
- Which dating method is commonly used to determine the age of materials from prehistoric times?
- Which of the following substances will turn red litmus paper blue?
- Which atmospheric layer contains ozone layer?
- Which radioactive element is used in heart pacemakers?
- A radioactive substance emits?
- Which of the following substances is classified as a carbohydrate?
- Deficiency of which of the following elements is responsible for weakening of bones? 1. Calcium 2. Phosphorus 3. Nitrogen 4. Carbon Select the correct ans...
- Marble is a metamorphic rock of:
- _____ are a group of chemicals that influence cell division and shoot formation.
- Which of the following is an example of a heterogeneous mixture?
