20 gram grandmother was upset about the black meaning of a silver jewellery. Anjali told her not to worry and that she knew how to bring back the Shine on the Silver well.
peetuk a steel Pan, a teaspoon of each baking soda and common salt, a silver object which has turned Black, 1 litre water and a gas stove .
1. to water in a steel Pan and boiled it.
2. she added baking soda and common salt in this water.
3. keep the black and silver object in this water.
4. allowed to stand for 30 minutes.
5. about the object from the pan using a pair of tongs and surprisingly the silverware was shining as if it was new. she asked her science teacher what are the causes of such changes for stop that teacher told blackening of silver article is a type of corrosion which is due to presence of hydrogen sulphide gas in air .
ON THE BASIS OF THE PASSAGE ANSWER THE FOLLOWING QUESTIONS :
1. could be the cause of the black meaning of the Silver where?
2. what is corrosion and what are the factors that initiate corrosion ?
3. why is the process of blackening of silver more Rapid in cities as compared to the villagers?
4. write the names of two commonly used metal oblique substances which shows similar behaviour when exposed to atmosphere ?
Answers
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Answer:
1) CORROSION WITH SULFUR TO FORM AgS
2) IT IS THE WEARING DOWN OF METALS. FACTORS ARE : MOISTURE, AIR ETC.
3) IT IS RAPID IN CITIES AS THERE ARE MORE SULFUR MOLECULES IN THE AIR DUE TO INDUSTRIES, VECHICLES ETC.
4)COPPER AND IRON ARE THE METALS
Explanation:
MARK AS BRAINLIEST.....
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