Number of $$\sigma$$ and $$\pi$$ bonds present in ethylene molecule is respectively :

An organic compound has $$42.1 \%$$ carbon, $$6.4 \%$$ hydrogen and remainder is oxygen. If its molecular weight is 342 , then its molecular formula is :

For the Compounds :

(A) $$\mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2-\mathrm{O}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3$$

(B) $$\mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3$$

(C)

(D)

The increasing order of boiling point is :

Choose the correct answer from the options given below :

The correct order of ligands arranged in increasing field strength.