List of top Chemistry Questions

In the eclipsed conformation of ethane, the dihedral angle between the hydrogen atoms of adjacent methyl groups is

Which one of the following is an essential amino acid?

Which of the following compounds show optical isomerism? (i) $cis-[Co(NH_3)_4Cl_2]^+$ (ii) $trans-[Co(en)_2Cl_2]^+$ (iii) $cis-[Co(en)_2Cl_2]^+$ (iv) $[Co(en)_3]^{3+}$ Choose the correct answer codes given below

Match the following:

List-I		List-n (At STP)
(A)	$10 \, g \, CaCO_3 \xrightarrow [\text{decomposition}]{\Delta}$	(i)	$0.224 \, L \, CO_2$
(B)	$1.06 \, g \, Na_2 CO_3 \xrightarrow{\text{Excess HCl}}$	(ii)	$4.48 \, L \, CO_2$
(C)	$2.4 \, g \, C \xrightarrow [\text{combustion}]{Excess \, O_2}$	(iii)	$0.448 \, L \, CO_2$
(D)	$0.56 \, g \, CO \xrightarrow [\text{combustion}]{\text{Excess} O_2}$	(iv)	$2.24 \, L \, CO_2$
		(v)	$22.4 \, L \, CO_2$

The correct match is