皮皮学，免费搜题
登录
搜题
【单选题】
下列离子组在给定条件下能否大量共存的判断正确，所发生反应的离子方程式也正确的是 选项 条件 离子组 离子共存判断及反应的离子方程式A.
滴加氨水 Na ＋ 、Al 3 ＋ 、Cl － 、NO 3 － 不能共存，Al 3 ＋ ＋3OH － ＝Al(OH) 3 ↓
B.
pH＝1的溶液 Fe 2 ＋ 、Al 3 ＋ 、SO 4 2 － 、MnO 4 － 不能共存， 5Fe 2 ＋ ＋MnO 4 － ＋8H ＋ ＝Mn 2 ＋ ＋5Fe 3 ＋ ＋4H 2 O
C.
由水电离出的H ＋ 浓度为1×10 －12 mol/L NH 4 ＋ 、Na ＋ 、NO 3 － 、Cl － 一定共存，NH 4 ＋ ＋H 2 O NH 3 ·H 2 O＋H ＋
D.
通入少量SO 2 气体 K ＋ 、Na ＋ 、ClO － 、SO 4 2 － 不能共存， 2ClO － ＋SO 2 ＋H 2 O＝2HClO＋SO 3 2 －
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Flame screens are used to ______.
A.
contain flammable fumes
B.
protect firefightiers from flames
C.
prevent flames from entering tanks
D.
keep flame and sparks from getting out of an engine’s exhaust system
【单选题】A steady flame in a gas range is the result of ______.
A.
a burning velocity equal to the combustion wave
B.
fuel being supplied at the same rate as the combustion wave
C.
fuel being supplied at a higher rate than that of burning velocity
D.
a free flowing supply of air from the openings in the head of the burner
【单选题】If the flame from combustion in the cylinder of a four-stroke engine past the piston into the space below, the accumulation of flammable mixture would be ignited, thus resulting in _____.
A.
the crankcase explosion
B.
lifting of the cylinder safety valve
C.
a scavenge fire
D.
opening of the manhole
【单选题】As can be seen from the passage, Carry the Flame ______.
A.
was founded by Mr. Cavelier, a Vietnam veteran
B.
members come from all over the country
C.
riders are also members of Rolling Thunder
D.
hold the flame-lighting ceremony once a year
【单选题】When subjected to high heat from a open flame, or an electric heating element, which of the listed refrigerants will break down and produce phosgene gas?
A.
CO2
B.
Methyl chloride
C.
R-22
D.
Sulphur dioxide
【单选题】Flame failure in an automatically fired auxiliary boiler can from a/an _________.
A.
incorrect electrode setting
B.
incorrect nozzle position
C.
clogged fuel nozzle
D.
broken high tension lead
相关题目：
参考解析：
知识点：
题目纠错 0
发布
