These are orders I think there r no tricks for these orders. U can simply learn them by making a chart nd paste it in ur room.

Trick to Remember I effect and -I effect
Understanding the concepts of I effect and -I effect is crucial in organic chemistry. Here is a trick to help you remember and differentiate between them:

What is I effect?
- The I effect (inductive effect) occurs when a polar covalent bond causes the displacement of electrons along a chain of atoms.
- It can be either electron-donating (+I effect) or electron-withdrawing (-I effect) depending on the nature of the substituent.

How to remember I effect?
- Think of the I effect as the "Influence" effect.
- Electron-donating groups (e.g. alkyl groups) have a positive influence on electron density, hence they exhibit a +I effect.
- Electron-withdrawing groups (e.g. halogens) have a negative influence on electron density, hence they exhibit a -I effect.

What is -I effect?
- The -I effect (negative inductive effect) occurs when an electronegative atom or group withdraws electron density away from a molecule.
- It results in the polarization of the sigma bond and a decrease in electron density.

How to remember -I effect?
- Think of the -I effect as the "Withdrawal" effect.
- Electronegative groups such as halogens, nitro groups, and carbonyl groups exhibit a strong -I effect due to their high electronegativity.
By using these simple mnemonic devices, you can easily remember the difference between I effect and -I effect, making it easier to apply these concepts in organic chemistry problems.