If beaker tongs are not available, which could you
use to handle the hot beaker?
mittens
1 tweezers
crucible tongs
heat resistant gloves
done

Answer:

If beaker tongs are not available, we could use crucible tongs to handle the hot beaker

Explanation:

Crucible tongs is tool shaped like a scissor where instead of two blades, two pincers or pieces of metals that concave together  is used. They help us to hold or  grasp a hot beakers, flasks or even small beakers. It is difficult for the people to catch or hold the hot beakers directly. So crucible tongs plays a vital role when burning, or using hot objects in the chemical laboratory.Crucible tongs are generally made with strong metal such as nickel, stainless or oxidized steel so as  to withstand very high and extreme temperatures.

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.