air
mercury
milk
cement
Which one of the following is not coal variety?
Which one of the following is not radioactive
Which one of the following is not the value of R ?
Which one of the following is the right sequence in increasing order of molecular weights of the hydrocarbons?
Which one of the following metals is used to galvanise iron ?
Which one of the following mixture is homogeneous
Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?
Which one of the following substances does not have a melting point
Which one radiation has the highest energy ?
Which scientist discovered the Atomic Theory?
