对下列实验过程的评价，正确的是
侯英超 |
发布日期：2010-05-19 05:28:08
<!--
/* Font Definitions */
@font-face
{font-family:宋体;
panose-1:2 1 6 0 3 1 1 1 1 1;
mso-font-alt:SimSun;
mso-font-charset:134;
mso-generic-font-family:auto;
mso-font-pitch:variable;
mso-font-signature:3 135135232 16 0 262145 0;}
@font-face
{font-family:"\@宋体";
panose-1:2 1 6 0 3 1 1 1 1 1;
mso-font-charset:134;
mso-generic-font-family:auto;
mso-font-pitch:variable;
mso-font-signature:3 135135232 16 0 262145 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{mso-style-parent:"";
margin:0cm;
margin-bottom:.0001pt;
text-align:justify;
text-justify:inter-ideograph;
line-height:15.6pt;
mso-pagination:none;
mso-layout-grid-align:none;
font-size:10.5pt;
mso-bidi-font-size:10.0pt;
font-family:"Times New Roman";
mso-fareast-font-family:宋体;}
/* Page Definitions */
@page
{mso-page-border-surround-header:no;
mso-page-border-surround-footer:no;}
@page Section1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;
mso-header-margin:36.0pt;
mso-footer-margin:36.0pt;
mso-paper-source:0;}
div.Section1
{page:Section1;}
-->
.对下列实验过程的评价，正确的是（ ） A．某溶液中滴加BaCl2溶液，生成不溶于稀硝酸的白色沉淀，该溶液中一定含有SO42― B．某无色溶液中滴入酚酞试液变红色，该溶液不一定是碱溶液 C．检验氢气纯度时，将试管口移近火焰，没有爆鸣声，表明氢气纯净 D．烧碱溶液中是否含有Cl―，可先加稀盐酸，再加AgNO3溶液即可 |
