Name a volatile substance

Fill in the blanks:- _______ is a volatile substance.

Name a chemical substance and an active enzyme which are secreted from sperm during penetration process?

Match the lists and find the correct options {:(" I"," II"),("(a) Early seed production","(i) Indole"),(" in conifers"," substance"),("(b) Seed development ","(ii) Terpene substance"),(," maturation"),("(c) Lateral shoot growth","(iii) Volatile substance"),("(d) Root hair formation","(iv) Adenine derivative"),(,"(v) Carotenoid derivative"):}

Write an example of opaque substance.

Name one substance which expand on heating.

Name the substance obtained at the cathode and at the anode when fused ICI is subjected to electrolysis.

Name one substance which has negligible expansion on heating.

Name some substances other than fruit which tastes sour?

Name the substance liberated at cathode and anode, when aqueous solution of NaBr is electrolysed?

Does the Gibbs free energy of a substance decrease or increase if the amount of the substance is increased?