MCQ
Which is the correct order of decreasing reactivity of metals?
- ✓$\ce{K > Na > Cu > Au}$
- B$\ce{Na > Au > Cu > K}$
- C$\ce{Cu > Na > K > Au}$
- D$\ce{Au > Cu > Na > K}$
✓
Answer
Correct option: A.
$\ce{K > Na > Cu > Au}$
Asbesto : was used for fireproof suits due to its high resistance to fire and heat.
Now a days, use of asbestos is banned in many countries because inhalation of asbestos fibres can cause a number of serious illness, including cancer.
Nomex : is a fire resistant nylon. Fire proof suits are made of nomex.
Kermel : is another fibre used as heat and flame protecting clothing.
Now a days, use of asbestos is banned in many countries because inhalation of asbestos fibres can cause a number of serious illness, including cancer.
Nomex : is a fire resistant nylon. Fire proof suits are made of nomex.
Kermel : is another fibre used as heat and flame protecting clothing.
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