Fill in the blanks with the correct words from the brackets:

Generally ionic compounds exist in (i) …………… [solid/liquid/gas] state. Melting and boiling points of covalent compounds are generally (ii) …………… [low/high]. The general formula for alkane is (iii) …………… (C_nH_2n/C_nH_2n-2/C_nH_2n+2). For alkynes the general formula is (iv) …………… (C_nH_2n/ C_nH_2n-2/C_nH_2n+2)

Write balanced equation for : Acetic acid is warmed with ethanol in the presence of conc. H₂SO₄.

Identity 'S' : Reddish brown liquid 'S' is dissolved in water. When ethyne is passed through it, turns colourless.

Which of the following statements is wrong about alkanes ?

(A) They are all saturated hydrocarbons.
(B) They can undergo addition as well as substitution reactions.
(C) They are almost non polar in nature.
(D) On complete combustion give out carbon dioxide and water.