121. Which one of the following looks odd__________________?
A. H2SO4
B. KMnO4
C. H2S
D. K2CrO4
122. In 1 – pentene -4- yne the carbon exhibit hybridization_________________?
A. sp3 – sp2
B. sp2 – sp
C. sp2 – sp
D. sp3 – sp2 – sp
123. When benzene is heated in air with V2O5 at 450°C yields_________________?
A. Phenol
B. Maleic anhydride
C. Glyoxal
D. Benzoic acid
124. Which one of the following will be sulphonated readily ?
A. Chlorobenzene
B. Toluene
C. Nitrobenzene
D. Benzene
125. When CO2 is made to react with ethy1 magnesium iodide in dry ether followed by acid hydrolysis yields______________?
A. Carboxylic acid
B. Ethanoic acid
C. Propanoic acid
D. Butanoic acid
126. Which is carnalite________________?
A. KCI
B. NaCI
C. KCI MgCl2 6H2O
D. Na2CO3. 10H2O
127. Which one does not give borax bead test_________________?
A. Copper sulphate
B. Barium sulphate
C. Cobalt sulphate
D. Nickel sulphate
128. The most reactive allotropic form of phosphorus is________________?
A. White
B. Redox potential
C. Black
D. Violet
129. Which molecule has the highest bond energy among the halogens_________________?
A. Fluorine
B. Chlorine
C. Iodine
D. Bromine
130. The most paramagnetic element is____________________?
A. Iron
B. Cobalt
C. Chromium
D. Manganese