Match List-I with List-II and select the correct answer using the codes given below the lists.List IList IIA. Sodium1. Good conductor of electricityB. Mercury2. Liquid at room temperatureC. Silver3. Poor conductor of heatD. Lead4. Can be easily cut with knifeMatch List-I with List-II and select the correct answer using the codes given below the lists.Code: A B C D

1. A

   2 3 1 4

   2 3 1 4 would make sodium a room-temperature liquid and mercury a poor heat conductor. Sodium is a soft solid; mercury is the liquid metal.

2. B

   1 4 3 2

   1 4 3 2 swaps the knife-cut property onto mercury and makes lead the liquid, which is false.

3. C

   4 2 1 3

   4 2 1 3 matches: sodium can be cut with a knife, mercury is liquid at room temperature, silver is an excellent electrical conductor, and lead is a relatively poor conductor of heat among metals. That is the official key.

4. D

   4 1 2 3

   4 1 2 3 gives mercury the ‘good conductor’ slot and silver the liquid slot. Silver is a solid; mercury is the liquid.

Summary. Official key is (c) 4 2 1 3. Alkali metals are soft; mercury is the familiar liquid metal; silver leads electrical conductivity tables; lead is a dull heat conductor compared with copper or silver. Honour the stored letter (c).