38.實驗室裡常用鹽酸與二氧化錳混合加熱製備氯,氯酸鉀與二氧化錳混合加熱製備氧。兩反應中所使用的二氧化錳,其作用分別為何?(A)均作為催化劑 (B)均作為氧化劑(C)前者為還原劑,後者為氧化劑 (D)
39.取濃度均為0.1 M的三種溶液:(甲) H2SO4(aq)、(乙) HCl(aq)、(丙) CH3COOH(aq)各50 mL,分別以0.1 M NaOH(aq) 滴定。下列敘述何者正確?(A)
40.阿司匹靈的製備過程如下:(1)用乙酐將柳酸乙醯化;(2)將所得反應混合物倒入水中,充分攪拌後過濾;(3)在沉澱物中加入飽和碳酸氫鈉溶液,再過濾;(4)最後將鹽酸加入濾液中,所得沉澱析出物即是阿司
4.Which of the following formulas would be expected for a compound between arsenic and fluorine?(A)A
5.The systematic name for Cu2O is(A)copper oxide (B)copper(I) oxide (C)copper(II) oxide (D)copper(II
8.What is the internal energy change when 2.0 moles of argon in a container of volume 500 cm3 is all
9.Given that the standard potential of the Cu+2/Cu and Cu+/Cu couples are 0.340 V and 0.522 V, respe
10.Which of the following is the strongest reducing agent at pH 14?(A)HNO3 (B)NO3- (C)SO3-2 (D)HPO3-
11.Which of the following is not an aromatic hydrocarbon?(A)benzene (B)ethylene (C)toluene (D)xylene
12.Which of the following is the general formula of the alkynes?(A)CnH2n+2 (B)CnH2n (C)CnH2n-2 (D)Cn
15.Aldehydes and ketones have which of the following structure in common?(A)OH (B)C = O (C)COOH (D)N
16.Amino acid link to form proteins by means of(A)Condensation polymerization (B)hydrogen bonding (C
17.Which of the following is not a step in radical-induced addition polymerization?(A)propagation (B