Question

macth the following 2. A B (a) red metal (i) Iron (ii) Magnesium (iii) Copper (iv) Lead (b) used in storage batteries (c) used in fireworks (d) rusts​

Answer 1

Answer:

Red metal-copper.

Used in a storage battery-lead.

Used in fireworks-magnesium

Rusts-iron.

Hope this helps. :))

Answer 2

Answer:

On matching, we get

$(a)$  Red metal                           $--->$     $(iii)$ Copper

$(b)$  Used in storage batteries  $--->$     $(iv)$ Lead

$(c)$  Used in fireworks               $--->$     $(ii)$ Magnesium

$(d)$  Rusts                                   $--->$      $(i)$ Iron

Explanation:

Let's go through the features given in column A to find out which of the options in column A matches the options in column B·

$(a)$   Red metal

We know that metals are colored due to the d-d transition of electrons·

From the given options in column B, the copper appears to be red· It is because the copper metal absorbs light in the wavelength of the blue-green region during the transition of the electrons in the d orbitals· So it reflects its complementary color as red·

Hence,

The option $(a)$  Red metal in column A matches with the option $(iii)$ Copper in column B·

$(b)$  Used in storage batteries

From the given options in column B, the lead metal is used in storage batteries·

Lead has got longer life span and cause less environmental harm· It can easily be recycled and reused· Also, it gives better energy· Due to these features, the lead is used in storage batteries·

Hence,

The option $(b)$  Used in storage batteries, in column A matches with option  $(iv)$ Lead in column B·

$(c)$  Used in fireworks

From the given options in column B, the magnesium element is used in fireworks·

On burning, magnesium produces a bright white light which is used in the fireworks to give white sparkles· Therefore magnesium is used in the fireworks·

Hence,

The option $(c)$  Used in fireworks in column A matches with option  $(ii)$ Magnesium in column B·

$(d)$  Rusts

From the given options in column B, the Iron causes the rust·

We know that rusting is a chemical reaction that occurs when the iron got exposed and contact with atmospheric oxygen in the presence of water· So, the process of rusting is caused by Iron·

Hence,

The option $(d)$  Rusts in column A matches with option $(i)$ Iron in column B·