Question : Which of the following statements is correct regarding fuse wire?

Option 1: It has a low melting point and low conductivity.

Option 2: It has a high melting point and low conductivity.

Option 3: It has a low melting point and high conductivity.

Option 4: It has a high melting point and high conductivity.

Question : Which of the following metals has the lowest density?

Option 1: Lithium

Option 2: Iron

Option 3: Gold

Option 4: Vanadium

Question : Which of the following liquids can dissolve noble metals such as Gold and Platinum?

Option 1: Formic acid

Option 2: Aqua regia

Option 3: Acetic acid

Option 4: Chloroform

Question : Which of the following is radioactive?

Option 1: Helium

Option 2: Sodium

Option 3: Thorium

Option 4: Platinum

Question : Which of the following statements is not correct regarding the alkali metals?

Option 1: All the alkali metals are silvery white, soft and light metals.

Option 2: The ionisation enthalpies of the alkali metals are considerably low and decrease down the group.

Option 3: Group 1 metals are known as alkali metals.

Option 4: All the alkali metals have two valence electrons.