AP POLYCET 2025
Section — B
CHEMISTRY
92) Why are cooking vessels made up of metals like copper and aluminium?
A) Because they are malleable
B) Because they are shiny
C) Because they are sonorous
D) Because they are good conductors of heat
93) Why are metals like potassium and sodium stored in kerosene oil?
A) To prevent oxidation
B) To avoid rusting
C) To prevent accidental fires due to their vigorous reaction with oxygen
D) To preserve their shiny surface
94) What is the process of forming a thick oxide layer on aluminium called?
A) Galvanisation
B) Anodising
C) Electrolysis
D) Oxidation
95) What happens when zinc is added to a solution of iron (II) sulfate?
A) No reaction takes place
B) Both metals react with each other to form an alloy
C) Iron displaces zinc and forms iron sulfate
D) Zinc displaces iron and forms zinc sulfate
96) What type of bond is formed when a metal transfers electrons to a non-metal?
A) Covalent bond
B) Metallic bond
C) Ionic bond
D) Hydrogen bond