The five elements present in most naturally occurring proteins are :
(A) `C,H,O,P,S`
(B) `N,C,H,O,I`
(C) `N,S,C,H,O`
(D) `C,H,O,S,I`

What types of bonds will be formed between the following pairs of elements and why? (a) K, CI (b) Ca, S (C)N, H (d) C, O

How many elements are more electropositive than CI . B, N, O, C, S, P, At, H, Li

Find DU of following compound:- (a) C_(6)H_(6)O , (b) C_(6)H_(5)I , ( c) C_(6)H_(6)ClBrO , (d) C_(5)H_(9)N

The law of triad is applicable to a group of a) Cl, Br, I b)C,N,O c) Na,K,Rb d) H,O,N

The degree of unsaturation of following compound C_(8)H_(12)O, C_(3)H_(5)N, C_(4)H_(8)O are respectively :

Which one of the following pairs has higher Delta_(eg)H^(ɵ) ? (a) S^(ɵ), O , (b) N^(ɵ), P (c ) S, O^(ɵ) , (d) O^(ɵ), S^(ɵ)

Assign oxidation number to the underlined elements in each of the following species: a. NaH_(2)PO_(4) b. NaHul(S)O_(4) c. H_(4)ul(P_(2))O_(7) d. K_(2)ul(Mn)O_(4) e. ul(Ca)O_(2) f. Naul(B)H_(4) g. H_(2)ul(S_(2))O_(7) h. KAl(ul(S)O_(4))_(2).12H_(2)O

Which of the following can be the isomer(s) of C_(8)H_(8)O :

Equimoler solulition of HF, HCOOH and HCN at 298 K have the values of Ka as 6.8xx10^(-4), 1.8xx10^(-4) and 4.8xx10^(-9) respectively, what will be the order of their acidic strength ? (A)H F > H C N > H C O O H (B)H F > H C O O H > H C N (C)H C N > H F > H C O O H (D)H C O O H > H C N > H F

C, H, O and N are called structural elements