Chemistry
Grade-10
Easy
Question
When an ammonium salt reacts with NaOH ammonia gas is evolved. How to identify it?
- It gives dense white fumes when a rod dipped in HCl is held in it.
- It turns moist red litmus paper blue.
- It turns phenolphthalein solution pink.
- All of the above.
Hint:
The compounds that dissolve in water to produce hydroxide ions OH- are known as alkalis. They come in all forms. They have very complicated chemical compositions given by their chemical formulae.
The correct answer is: All of the above.
When an ammonium salt reacts with NaOH ammonia gas is evolved. To identify it:
The following changes occur:
It gives dense white fumes when a rod dipped in HCl is held in it.
It turns moist red litmus paper blue.
It turns the phenolphthalein solution pink.
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