Which of the following statement is not ...

Which of the following statement is not true abount acid rain ?

Causes no damage to monuments like Taj Mahal.

It is harmful for plants.

Its pH is less than 5.6

It is due to reaction of `SO_2 NO_2 and CO_2` with rain water

Text Solution

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The correct Answer is:

Acid rain is any form of precipitation that contains acid components, such as sulfuric or nitric acid. Acid rain affect nearly everything: plants, soil, trees, buildings and even statues. Acid rain can have a pH of about 5.0-5.5 and even 4 - 4.5 in more polluted areas
Acid rain reacts with marble, `CaCO_3` , of Taj Mahal causion damage to it. As a result, the monument is being slow disfigured and the marble is getting discoloured and lustrele

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Which of the following statement is true : -

Silicon exhibits 4 coordination number in its compound

Bond energy of `F_2` is less than `Cl_2`

Mn(III) oxidation state is more stable than Mn (II) in aqueous state

Elements of `15^"th"` gp shows only + 3 and + 5 oxidation states

Which of the following statements is true :

Ammonia is the weakest reducing agent and the strongest base among Group 15 hydrides.

Ammonia is the strongest reducing agent as well as the strongest base among Group 15 hydrides.

Ammonia is the weakest reducing agent as well as the weakest base among Group 15 hydrides.

Ammonia is the strongest reducing agent and the weakest base among Group 15 hydrides.

Which of the following statements is true ?

A convex lens with power + 4D has a focal length -0.25 m

A convex lens with power - 4D has a focla length + 0.25 m

A concave lens with power + 4D has a focal length - 0.25 m

A concave lens with power - 4D has a focal length - 0.25 m