The atom or group which has more power to attract (withdraw) electrons in comparison to hydrogen is said to have -I effect

The atom or group which has less power to attract the electrons than hydrogen is said to have + I effect

Mesomerism is extended resonance. Atoms or groups with lone pairs of electrons release electrons when connected to doubly bonded carbons. It is +M effect. Unsaturated groups when connected to doubly bonded carbons withdraw pi electrons from the doubly bonded carbons. It is -M effect. Here the double bond is the unsaturated group should be between less electronegative atom and more electronegative atom. Which of the following is most stable?

Mesomerism is extended resonance. Atoms or groups with lone pairs of electrons release electrons when connected to doubly bonded carbons. It is +M effect. Unsaturated groups when connected to doubly bonded carbons withdraw pi electrons from the doubly bonded carbons. It is -M effect. Here the double bond is the unsaturated group should be between less electronegative atom and more electronegative atom. Which of the following statements is right?

Mesomerism is extended resonance. Atoms or groups with lone pairs of electrons release electrons when connected to doubly bonded carbons. It is +M effect. Unsaturated groups when connected to doubly bonded carbons withdraw pi electrons from the doubly bonded carbons. It is -M effect. Here the double bond is the unsaturated group should be between less electronegative atom and more electronegative atom. Mesomeric effect stabilizes or destabilizes the conjugate base of an acid. As a result the acid may be strong or weak has 4(OH) groups. Which -OH is a strong acid?

Mesomerism is extended resonance. Atoms or groups with lone pairs of electrons release electrons when connected to doubly bonded carbons. It is +M effect. Unsaturated groups when connected to doubly bonded carbons withdraw pi electrons from the doubly bonded carbons. It is -M effect. Here the double bond is the unsaturated group should be between less electronegative atom and more electronegative atom. Mesomeric effect stabilizes or destabilizes the conjugate base of an acid. As a result the acid may be strong or weak has 4(OH) groups. Which -OH is a strong acid?

The oxyacid of phosphorous which has more non- ionisable hydrogens

The oxyacid of phosphorous which has more non-ionisable hydrogens

Which one of the following has more number of unpaired d-electrons ?

Two carbon atoms in which of the following have more number of shared electrons

Two carbon atoms in which of the following have more number of shared electrons