Which of the following is not explained by hyperconjugation?

Explain the terms Inductive and Electromeric effects. Which electron displacement effect explains the following correct orders of acidity of the carboxylic acids?
$(a)$ $Cl_3CCOOH > Cl_2CHCOOH > ClCH_2COOH$
$(b)$ $CH_3CH_2COOH > (CH_3)_2CHCOOH > (CH_3)_3C \cdot COOH$

Fill in the blanks:
$(1)$ In $+E$ effect,$\pi$ electrons from a multiple bond migrate to the ........... .
$(2)$ In $-E$ effect,$\pi$ electrons from a multiple bond migrate to the ........... .
$(3)$ ........... and ........... increase stability.
$(4)$ ........... inductive effect increases the acidic strength and ........... inductive effect decreases the strength of $-COOH$.

Match List $I$ with List $II$:

$(A)$. Inductive effect	$(I)$. Delocalization of $\pi$ electrons
$(B)$. Hyper-conjugation	$(II)$. Displacement of $\pi$ electrons
$(C)$. Resonance effect	$(III)$. Delocalization of $\sigma$ electrons
	$(IV)$. Displacement of $\sigma$ electrons

Choose the correct answer from the options given below:

Which of the following is the most stable carbanion?

What is the difference between inductive effect and resonance effect?