វិញ្ញាសាទី៤តែស្តត្រៀមគ្រូមធ្យម
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
Soeung RTTC
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
តើធាតុរលាយណាមួយដែលមានកម្រិតរលាយក្នុងទឹក(គិតជា mol/L) ច្រើន
ជាងគេនៅសីតុណ្ហភាព 25oC និង 1 atm?
ក) CH4 ខ) NH3
គ) AgCl ឃ) CaSO4
ក
ខ
គ
ឃ
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
តើឧស្ម័នមានពណ៌មួយកើតឡើងពីល្បាយណាមួយ?
កាល់ស្យូមកាបួ និងទឹក
លោហៈសំណរ និងអាស៊ីតនីទ្រិច
សូដ្យូមកាបូណាត និងអាស៊ីតស៊ុលផួរិច
ស័ង្គសីស៊ុលផួរ និងអាស៊ីតអ៊ីដ្រូក្លរិច
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
តើលក្ខណៈណាមួយដែលថយចុះពីឆ្វេងទៅស្តាំក្នុងតារាងខួប និងកើនឡើង
ពីលើចុះក្រោម?
ក) កាំអាតូម ខ) អេឡិចត្រូអវិជ្ជមាន
គ) ថាមពលអ៊ីយ៉ុងកម្ម ឃ) ចំណុចរលាយ
ក
ខ
គ
ឃ
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
តើpH នៃសូ.អាស៊ីតផរមិច HCOOH កំហាប់ 0.15M ស្មើប៉ុន្មាន?
(K(HCOOH) = 1.9 x 10-4)
ក) 1.49 ខ) 2.27
គ) 3.72 ឃ) 4.55
ក
ខ
គ
ឃ
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
i. បារត(II)អុកស៊ីត HgO ត្រូវបានបំបែកដោយកម្តៅតាមសមីការខាងក្រោម
2HgO(s) ⇄ 2Hg(l) + O2(g)
តើមួយណាជាកន្សោមថេរលំនឹងសម្រាប់ប្រតិកម្មខាងលើនេះ?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
សម្រាប់ប្រតិកម្ម 2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(l)
ល្បឿនបំបាត់C2H6(g)
ស្មើនឹងល្បឿនបំបាត់ O2(g)
ស្មើនឹងមួយភាគបីនៃល្បឿនកំណរ H2O
លឿនជាងល្បឿនបំបាត់O2(g) 7 ដង
លឿនជាងល្បឿនកំណរO2 2ដង
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2N2H4(l) + N2O4(l) → 3N2(g) + 4H2O(g) ∆H = -1078 kJ/mol
តើប្រតិកម្មនេះបញ្ចេញកម្តៅប៉ុន្មានkJ បើសិនកំណរបាន 10 g នៃ N2(g)?
1079 kJ
128.33 kJ
5390 kJ
3234 kJ
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