A. activation
B. enameling
C. corrosion
D. coating
Related Mcqs:
- Which of following metals can be displaced by all other metals from its solution ?
A. Ag
B. A
C. Au
D. Cu - If a physical and chemical change takes place at a constant pressure then the heat change during the process is called__________________?
A. Heat of transition
B. Heat of fusion
C. Enthalpy change
D. All of above - Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
A. Smaller electronegativity of alkali metals
B. Smaller ionic radius of these metals
C. De-excitation of electrons from higher energy levels to low energy level
D. Excitation of electrons from low energy levels to higher energy levels - Second ionization potential of alkali metals are very high due to_______________?
A. being s-block elements
B. inert gas configurations
C. ns1 electronic configuration
D. being metals - Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?
A. Zeolites
B. Sulphonides
C. Lime
D. NitratesSubmitted by: Rashid Mehmood
- The process of aluminium extraction is called__________________?
A. Hall process
B. Thermite process
C. Haber process
D. Contact process - Compounds attracted by applied strong magnetic field are called__________________?
A. diamagnetic
B. paramagnetic
C. good conductor
D. ferromagnetic - The species which donate two electron pairs in a coordination compound is called__________________?
A. ligand
B. mono-dentate ligand
C. poly-dentate ligand
D. bi-dentate ligand - When electrons collide with heavy metals than ___________ are produced?
A. Beta-rays
B. Alpha-rays
C. X-rays
D. Gamma-rays - A elements are named as alkali metals because_______________?
A. Their oxides are basic
B. Their oxide and hydroxides are water soluble
C. Both A & B
D. They are found in earth
