- Metals
- Nonmetals
- Alkali earth metals
- Noble gas
- Only acetylene
- Only CO2
- Acetylene + CO2
- CO2 + H2
- Butane and isobutane
- Butane and 2,5–dimethylhexane
- Butane, 2,5-dimethylhexane and isohexane
- Butane and isohexane
- pri. alcohol
- monohydric alcohol in which -OH group is attached to two carbon atoms
- monohydric alcohol containing -OH group on tert. carbon atoms
- monohydric alcohol in which -OH group is linked to sec, carbn
- a super conductor of electricity
- a conductor of electricity
- a semi-conductor
- an insulator
- hexanoic acid
- 1-pentanoic acid
- iso-pentanoic acid
- neo pentanoic acid
- Similar physical property ,different atomic masses
- Similar chemical property ,different atomic masses
- Similar physical property ,different atomic Number
- Similar chemical property ,different atomic Number.
- starch
- b synthetuc rubber
- natural nubber
- PVC
- same atomic ratio
- similar molecular formulae
- similar chemical properties
- ALL
- Al²O³
- Fe²O³
- AlCl³ and HCl
- Concentrated H²SO⁴
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