Q.No.1

Ozone is easily detected by use of

Q.No.2

When SO2 reacts with iron

Q.No.3

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

Q.No.4

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

Q.No.5

Which of the following turns lead acetate paper black?

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 an amphoteric oxide?

Q.No.9

Which of the following is a mixed oxide?

Q.No.10

Most abundant element on earth crust is


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