2022 d block
Authored by Nipuna Perera
Chemistry
12th Grade
Used 1+ times
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14 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
පහත සදහන් අයන අතරින් නිල් පැහැති අයනයක් වන්නේ,
Zn2+
Fe3+
Cu2+
Fe2+
Sc3+
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cu ලෝහය තනුක නයිට්රික් අම්ලය සමග ප්රතික්රියා කළ විට මුක්ත වන වායුව වන්නේ,
SO2
NO2
H2
NO
CO
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ඉහළම පළමු අයනීකරණ ශක්තියක් ඇත්තේ,
Sc
Mn
Cu
Ni
Zn
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
d - ගොනුවේ මූලද්රව්ය හා සංයෝග අතරින් උත්ප්රේරකයක් ලෙස භාවිත නොවන්නේ,
Pt
Ni
V2O5
Fe
Zn
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
MnO2 යනු,
දුබල ආම්ලික ඔක්සයිඩයකි
ප්රබල ආම්ලික ඔක්සයිඩයකි
දුබල භාෂ්මික ඔක්සයිඩයකි
උභයගුණි ඔක්සයිඩයකි
උදාසීන ඔක්සයිඩයකි
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ක්ෂාරීය තත්ත්ව යටතේ දී MnO4-, I- සමග ප්රතික්රියා කළ විට ලැබෙන ඵලයක් වන්නේ,
I2
I3-
Mn2+
IO3-
MnO42-
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
[Ni(H2O)3Cl3]- අයනයේ දී Ni හි ඔක්සිකරණ අංකය වන්නේ,
+1
+2
+3
+4
+5
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