Grade 12 - Chemistry Exercise #1

Grade 12 - Chemistry Exercise #1

Assessment

Assessment

Created by

Rodwel Kov

Chemistry

12th Grade

102 plays

Hard

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10 questions

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1.

Multiple Select

5 mins

1 pt

1.រកគូរេដុកដែលត្រូវនឹងសមីការខាងក្រោមនេះ
 SO2+2H2S+2H2OSO_2+2H_2\rightarrow S+2H_2O  

 SO2 /SSO_2\ \text{/}S  

 S2O /S2S_2O\ \text{/}S_2  

 H2O /H2H_2O\ \text{/}H_2  

 HO2 /HHO_2\ \text{/}H  

2.

Multiple Select

5 mins

1 pt

1. ធ្វើចំណាត់ថ្នាក់គូរេដុកដែលត្រូវនឹងសមីការខាងក្រោមនេះ 
 SO2+2H2S+2H2OSO_2+2H_2\rightarrow S+2H_2O  

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3.

Multiple Select

30 sec

1 pt

1. រកគូរេដុកដែលត្រូវនឹងសមីការខាងក្រោមនេះ
 Cr2O72+6Cl+14H+Cr_2O_7^{2-}+6Cl^-+14H^+  
 2Cr3++3Cl2+7H2O\rightarrow2Cr^{3+}+3Cl_2+7H_2O  

 Cl /Cl2Cl^-\ \text{/}Cl_2  

 Cr2O72 /Cr3+Cr_2O_7^{2-}\ \text{/}Cr^{3+}  

 Cl2 /ClCl_2\ \text{/}Cl^-  

 HO2 /HHO_2\ \text{/}H  

4.

Multiple Choice

5 mins

1 pt

1. ធ្វើចំណាត់ថ្នាក់គូរេដុកដែលត្រូវនឹងសមីការខាងក្រោមនេះ
 Cr_2O_7^{2-}+6Cl^-+14H^+   \rightarrow2Cr^{3+}+3Cl_2+7H_2O  

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5.

Multiple Select

5 mins

1 pt

  2. ប្រតិកម្មមួយតាងដោយសមីការៈ A +2BC+3DA\ +2B\rightarrow C+3D  នៅពេល t=10mint=10\min   មាន [D]= 3.50×103M3.50\times10^{-3}M  និង   t=25 mint=25\ \min  មាន​  [D]=9.50×103M\left[D\right]=9.50\times10^{-3}M 

I).គណនាល្បឿនមធ្យមកំណ D នៅចន្លោះពេល t= 10 minនិង t= 25min ។
II).គណនាល្បឿនមធ្យមបំបាត់ B នៅចន្លោះពេល t= 10 minនិង t= 25min ។

I). 2×104M/min2\times10_{ }^{-4}M/\min  

I). 4×104M/min4\times10^{-4}M/\min  

I). 4×103M/min4\times10^{-3}M/\min  

II). 2.66×104M/min2.66\times10^{-4}M/\min  

II). 1.33×104M/min1.33\times10^{-4}M/\min  

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