Discussion
Match the following :
| Reactivity of Substance | Example |
|---|---|
| (a) Spontaneously and/or vigorously react with water | (i) Dynamite |
| (b) Spontaneously and/or vigorously react with air | (ii) Aluminium nitrate |
| (c) Generate toxic fumes | (iii) Phosphorous pentaoxide |
| (d) Explosive substance | (iv) Trimethyl aluminium |
Answer: D
The correct matching is a-iii, b-iv, c-ii, d-i.
- (a) Reacts vigorously with water: phosphorus pentoxide, which reacts violently and exothermically with water to give phosphoric acid; it is a powerful dehydrating agent.
- (b) Reacts spontaneously with air: trimethylaluminium, which is pyrophoric and ignites on contact with air.
- (c) Generates toxic fumes: aluminium nitrate, which gives off toxic nitrogen oxides when heated or in a fire.
- (d) Explosive substance: dynamite.
Option B puts trimethylaluminium against water and phosphorus pentoxide against air; trimethylaluminium does react with water too, but its defining hazard is ignition in air, and phosphorus pentoxide is not air-reactive. Options A and C pair dynamite with air or water reactivity, which misplaces the one explosive.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development