
南一國中自然2下_ch3-1
Authored by 南一 自然
Science
8th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列有關鈉離子與鈉原子的敘述何者正確?
NaOH與NaCl溶於水所產生的鈉離子性質各不相同
鈉離子與鈉原子性質大致相同
可以導電的是鈉原子
鈉原子比鈉離子多一個電子
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氯化鈣水溶液中,所含的氯離子(Cl-)與鈣離子(Ca2+)的總電量比為多少?
1:2
2:1
1:1
無法得知
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列解離反應式何者正確?
Ca(OH)2→Ca2++OH2-
Na2SO4→2Na++SO42-
CaCl2→Ca2++Cl2-
NaHCO3→Na++H++ CO32-
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於強電解質之說法,下列哪一項是錯誤的?
相同條件下,強電解質可使燈泡較亮
強電解質在水中可產生較多的帶電的粒子
在水中溶解度很大的物質,是強電解質
強酸、強鹼一般也都為強電解質
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
(a)液態氯化氫;(b)冰醋酸;(c)二氧化碳氣體;(d)熔融狀態的食鹽;(e)石墨碳棒;(f)鹽酸;(g)純水;(h)銅金屬。哪些物質是電解質?
abefh
abcdf
adeh
defh
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
某一燒杯所裝的溶液中僅有A+、B2+、C2-三種離子,若溶液中的離子個數比為B2+:C2-=2:3,則溶液中的A+:C2-離子個數比應為下列何者?
2:3
3:1
1:2
3:2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
若氯化鈣(CaCl2)水溶液中含有0.5莫耳的氯離子,則水溶液中應含有多少莫耳的鈣離子?
0.25莫耳
0.5莫耳
0.75莫耳
1.0莫耳
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