(1) According to the characteristics of the device, A is a distillation bottle and C is a volumetric bottle, so the answer is: distillation bottle; Volumetric flask;

(2) separating the mixture of carbon tetrachloride and alcohol by distillation. Instruments include: alcohol lamp, distillation bottle, thermometer, condenser tube, trumpet tube, beaker (conical bottle). The mercury ball of the thermometer should be placed at the branch nozzle of the distillation flask, and the water inlet direction of the condenser tube is: the lower nozzle enters the upper nozzle and exits, so the answer is: refined lamp; Branch nozzle of distillation bottle; g； ?

(3)① In the pipetting operation, in order to prevent the liquid from spilling, a glass rod should be used for drainage, and the instruments used are: a 500mL volumetric flask; Beaker, glass rod, rubber dropper, balance, etc. What is missing from the experiment? Glass rod, rubber head dropper, so the answer is: glass rod is not used for drainage; Glass rod, rubber head dropper;

② The mass of NaOH needed is m = 0.1mol/l× 0.5l× 40g/mol = 2.0g, so the answer is: 2.0g; ?

③ According to the experimental operation steps, there are calculation, weighing, dissolution, pipetting, washing and pipetting, constant volume and shaking. The sequence is BCAFED, so the answer is BCA Fed;

(4) A. If the NaOH used has deliquesced, N will decrease, so the result is low, so it is wrong;

B. If the volumetric flask is not filled with water to the graduation line, then V is too small and C is too high, which is correct;

C. If there is still a small amount of NaOH solution in the beaker that has not been transferred, then N is too small, so C is too low, so it is wrong;

D. When weighing, "left code is right", then M is too small, that is, N is too small, so C is too low, so it is wrong;

E. A small amount of distilled water in the volumetric flask will not affect the experimental results, so it is wrong;

F. The volumetric bottle contains NaOH solution, which is not cleaned before use, so N is on the high side, so C is on the high side, so it is correct;

G. Look down at the scale line at constant volume. V is small and C is high, which is correct;

H. Shake the volumetric flask after constant volume. When standing, it is found that the liquid level is lower than the scale line, so a small amount of water is added to the scale line, which is equivalent to diluting the solution, so C is too small, so it is wrong.

So the answer is: BFG. ..