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Subjects
Science CBSE
Class 7
Acids, bases and salts
Properties and pH scale
10.
Analyse the question and answer it
Exercise condition:
4
m.
I)
Though acids react with metals and liberate hydrogen gas, some metals don't. From the following metals, which metal does not liberate hydrogen gas?
Zinc
Cesium
Copper
Magnesium
II)
Salt gives a brisk effervescence effect during a test. Which test do so?
Flame test
Physical examinations
HCl test
Dry test
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