Q121. Which of the following is NOT a necessary condition for electrochemical corrosion?

Q122. The figure shows the struture of following solid.

Q123. Which method is NOT effective in preventing dry corrosion?

Q124. Which one is NOT a property of Ethane?

Q125. Corrosioin of bolts, nut, rivets are ______.

Q126. What is the general formula for alkenes containing two double bonds?

Q127. The compound \(CH_3CH_2CH=CH_2\) belongs to which class of hydrocarbons?

Q128. Which of the following compounds has the highest boiling point?

Q129. Which of the following is an open-chain (acyclic) compound?

Q130. The holes occur on metal in______corrosion.