Q.No.1

When SO2 reacts with iron

Q.No.2

Which of the following turns lead acetate paper black?

Q.No.3

What is formed when oxalic acid is dehydrated by conc(c) H2SO4?

Q.No.4

Ozone is easily detected by use of

Q.No.5

A solution of SO2 in water reacts with H2S to precipitate sulphur. Here SO2 acts as

Q.No.6

Caro's Acid is

Q.No.7

Ozone is formed in the upper layer of the atmosphere by

Q.No.8

Which of the following is a mixed oxide?

Q.No.9

Which of the following is an amphoteric oxide?

Q.No.10

Most abundant element on earth crust is


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