Which of the following is true about small and stable

lion 1 5 Then rium 9 Major product of the given reaction is 1 8 Br K Br HBr Product 2 F Br Br

Partial reduction b Partial oxidation c Complete reduction d Complete oxidation 2 A Define electron gain enthalpy Explain why group 17 elements have large egative electron gain enthalpies and group 18 elements have high positive electron gain enthalpies 3 marks

70 Carbonyl compounds when treated with sodium bisulphite cc solution generally a crystalline sodium bisulphite addition product is formed but which of the following carbonyl compound not forms crystalline addition product a HCHO b CH3CHO Na HS c CH3COCH 3 71 Main product of the reaction is bu oby d C H5COC H5 all aldeh methyl ke

1 Among the given pairs in which pair first compound reacts faster than second compound in S SN1 reaction a CH3 CH2 CH CH2 Br or CH3 CH 2 CH CH3 THE Br CH 3 CH 3 b CH3 C CH CH or CH3 CH CH CH3 Br Br C Br 6 6 or CH 3 1 d CH3 C CH3 11 ve Br Br CH 3 or CH3 C CH 3

Please solve the following 18 electron problem using two types of ionic and covalent models Ph P Ph OC OC OC RO Os BH RO Au Au co OR OR OR RIC W R CH O Co Co 8 Br CH t Bu Au t Au 1 CH3 Rh O Rh R

hich of the following pair s is are resonating structures e CH CH CH CH CH3 and CH CHCH CHCH e CH CH CH CH CH and CH CH CHCH CH CH CH CH and CH CHCH 15 CH CH CH CH CH and CH CH CH CH CH

49 How many terminal alkynes isomers are possible for the formula CeH10 O No 49

H of D H3C OH Which statement is correct SOCI SOCI Pyridine X y x and y are superimposable mirror images x and y are non superimposable mirror images O x and y are neither mirror images nor super imposable x and y are structural isomers

How many of the following elimination takes place via E1CB mechanism Br OH H C CH CH C CH3OH H3C CH CH C CH3 MeO Ph O C H5O A NO 2 H MeO A H3C S CH CH OPh Ph NaOD D 0 A NO 2 01S H C S CH CH

C 1 In which of the following bond angles on sp hybridized are not contracted due to lone pair of electron 6 110 a OF b H O c CH3OCH3 3 R N d CH OH M 10 with ammonia and passed over