论文部分内容阅读
一、选择题(下列每小题有1—2个正确答案,将正确答案的序号填入题后的括号内) 1.实验室制取下列气体时,需要加热,又可用向下排空气法收集的气体是( )。 (1)HCl (2)NH_3 (3)C_2H_2 (4)O_2 (5)CH_4 2.实验室量取稀盐酸可使用的仪器是( )。 (1)烧杯 (2)容量瓶 (3)酸式滴定管 (4)量筒 (5)分液漏斗 3.能鉴别盐酸、澄清石灰水、氯化钙溶液的试剂是( )。 (1)石蕊试液 (2)NaHCO_2溶液 (3)Na_2CO_3溶液(4)AgNO_3溶液
First, multiple-choice questions (the following each question has 1-2 correct answers, the number of the correct answer is filled in the brackets after the question) 1. When the following gases are produced in the laboratory, heating is needed, and the air can be discharged downwards. The gas collected is (). (1) HCl (2) NH_3 (3) C_2H_2 (4) O_2 (5) CH_4 2. The instrument for the measurement of diluted hydrochloric acid in the laboratory is (). (1) Beaker (2) Volumetric flask (3) Acid burette (4) Graduated cylinder (5) Separation funnel 3. The reagent for identifying hydrochloric acid, clarified lime water, and calcium chloride solution is (). (1) Lilyse test solution (2) NaHCO 2 solution (3) Na 2 CO 3 solution (4) AgNO 3 solution