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Q.No.1

Which one of the following is not a mineral acid?

Q.No.2

Which one of the following gases is the primary cause of acid rain?

Q.No.3

Who discovered the phenomenon of acid rain?

Q.No.4

Which one of the following causes temporary hardness of water?

Q.No.5

Which of the following salt of hard water is removed by treating with soda?

Q.No.6

Which chemicals causes permanent hardness of water?

Q.No.7

Which water forms lather easily with soap?

Q.No.8

Which alloy is made by using 90% copper and 10% tin?

Q.No.9

Which non-metal is used with iron and chromium to make stainless stell?

Q.No.10

Which of the following is an alloy of copper?


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