- (A) O
- (B) 1
- (C) 2
- (D) 3
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- (A) H2S2O3
- (B) H2SO8
- (C) H2S4O6
- (D) H2 S2 O6
- (A) Flurocarbon
- (B) Carbon monoxide
- (C) Methane
- (D) C2H2
- (A) Acetone
- (B) Acetic acid
- (C) Acetophenone
- (D) Phenyl acetate
- (A) 1.65 g/L
- (B) 1.67 g/L
- (C) 1.68 g/L
- (D) None of the above
- (A) C
- (B) Zn
- (C) Al
- (D) Cu
- (A) Roasting
- (B) Forth flotation
- (C) Electrolysis
- (D) Distillation
- (A) MnO2
- (B) Mn2O3
- (C) Mn2O7
- (D) MnO
- (A) Reduce it
- (B) Oxidize it
- (C) Obtain an alloy
- (D) Separate volatile impurities
- (A) n=2,l=1,m1=0,ms=+1/2
- (B) n=2,l=1,m1=-1,ms=+1/2
- (C) n=2,l=0,m1=0,ms=-1/2
- (D) n=2,l=2,m1=1,ms=-1/2
