【Learn Ethylene Together】Five questions per day to easily learn about ethylene 19
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【Learn Ethylene Together】Five questions per day to easily learn about ethylene. 19 91. The chemical bond formed between atoms through the sharing of electron pairs is called ( ). 92. The working principle of a foam fire extinguisher is expressed by the equation ( ). 93. The direct cause affecting the surface temperature of the coil and the pressure difference inside the tube is ( ). 94. There are two main categories of methods for quenching high-temperature pyrolysis gas: one is ( ), and the other is ( ); the cooling of pyrolysis gas by waste heat boilers belongs to ( ). 95. The two main factors affecting the selectivity of ethylene in the cracking reaction are ( ) and ( ). 91. The chemical bond formed between atoms through the sharing of electron pairs is called ( ). Covalent bonds 92. The principle of action of a foam fire extinguisher is expressed as an equation as ( ). 6NaHCO3+Al2(SO4)3 ==3Na2SO4 +2Al(OH)3↓＋6CO2↑ 93. The direct cause affecting the surface temperature of the coil and the pressure difference inside the tube is ( ). Is the combustion in the burner normal? 94. There are two main types of methods for rapidly cooling high-temperature pyrolysis gas; one type is ( ), and the other is ( ). The cooling of pyrolysis gas by a waste heat boiler belongs to ( ). Direct quenching, indirect quenching, indirect quenching. 95. The two main factors that affect the selectivity of ethylene in the cracking reaction are ( ) and ( ). Average residence time Average hydrocarbon partial pressure
91. The chemical bond formed between atoms through the sharing of electron pairs is called a (covalent bond). 92. The principle of action of foam fire extinguishers can be expressed using equations: (Step 1: 3Na2CO3 + Al2(SO4)3 = 3Na2SO4 + Al2(CO3)3; Step 2: Al2(CO3)3 + 6H2O = 2Al(OH)3 + 3H2O + 3CO2). 93. The direct factor affecting the surface temperature of the coil and the pressure difference inside the tube is (whether the burner is burning properly). 94. There are two main types of methods for quenching high-temperature pyrolysis gas: one is (direct quenching), and the other is (indirect quenching); the cooling of pyrolysis gas by waste heat boilers falls under (indirect quenching). 95. The two main factors affecting the selectivity of ethylene in the cracking reaction are (evaluation of residence time) and (evaluation of hydrocarbon partial pressure).
91. The chemical bond formed between atoms through the sharing of electron pairs is called a (covalent bond). 92. The principle of action of foam fire extinguishers can be expressed using equations: (Step 1: 3Na2CO3 + Al2(SO4)3 = 3Na2SO4 + Al2(CO3)3; Step 2: Al2(CO3)3 + 6H2O = 2Al(OH)3 + 3H2O + 3CO2). 93. The direct factor affecting the surface temperature of the coil and the pressure difference inside the tube is (whether the burner is burning properly). 94. There are two main types of methods for quenching high-temperature pyrolysis gas: one is (direct quenching), and the other is (indirect quenching); the cooling of pyrolysis gas by waste heat boilers falls under (indirect quenching). 95. The two main factors affecting the selectivity of ethylene in the cracking reaction are (evaluation of residence time) and (evaluation of hydrocarbon partial pressure).
91. The chemical bond formed between atoms through the sharing of electron pairs is called a (covalent bond). 92. The principle of action of foam fire extinguishers can be expressed using equations: (Step 1: 3Na2CO3 + Al2(SO4)3 = 3Na2SO4 + Al2(CO3)3; Step 2: Al2(CO3)3 + 6H2O = 2Al(OH)3 + 3H2O + 3CO2). 93. The direct factor affecting the surface temperature of the coil and the pressure difference inside the tube is (whether the burner is burning properly). 94. There are two main types of methods for quenching high-temperature pyrolysis gas: one is (direct quenching), and the other is (indirect quenching); the cooling of pyrolysis gas by waste heat boilers falls under (indirect quenching). 95. The two main factors affecting the selectivity of ethylene in the cracking reaction are (evaluation of residence time) and (evaluation of hydrocarbon partial pressure).
91. The chemical bond formed between atoms through the sharing of electron pairs is called a (covalent bond). 92. The principle of action of foam fire extinguishers can be expressed using equations: (Step 1: 3Na2CO3 + Al2(SO4)3 = 3Na2SO4 + Al2(CO3)3; Step 2: Al2(CO3)3 + 6H2O = 2Al(OH)3 + 3H2O + 3CO2). 93. The direct factor affecting the surface temperature of the coil and the pressure difference inside the tube is (whether the burner is burning properly). 94. There are two main types of methods for quenching high-temperature pyrolysis gas: one is (direct quenching), and the other is (indirect quenching); the cooling of pyrolysis gas by waste heat boilers falls under (indirect quenching). 95. The two main factors affecting the selectivity of ethylene in the cracking reaction are (evaluation of residence time) and (evaluation of hydrocarbon partial pressure).
91. The chemical bond formed between atoms through the sharing of electron pairs is called a (covalent bond). 92. The principle of action of foam fire extinguishers can be expressed using equations: (Step 1: 3Na2CO3 + Al2(SO4)3 = 3Na2SO4 + Al2(CO3)3; Step 2: Al2(CO3)3 + 6H2O = 2Al(OH)3 + 3H2O + 3CO2). 93. The direct factor affecting the surface temperature of the coil and the pressure difference inside the tube is (whether the burner is burning properly). 94. There are two main types of methods for quenching high-temperature pyrolysis gas: one is (direct quenching), and the other is (indirect quenching); the cooling of pyrolysis gas by waste heat boilers falls under (indirect quenching). 95. The two main factors affecting the selectivity of ethylene in the cracking reaction are (evaluation of residence time) and (evaluation of hydrocarbon partial pressure).
91. The chemical bond formed between atoms through the sharing of electron pairs is called a (covalent bond). 92. The principle of action of foam fire extinguishers can be expressed using equations: (Step 1: 3Na2CO3 + Al2(SO4)3 = 3Na2SO4 + Al2(CO3)3; Step 2: Al2(CO3)3 + 6H2O = 2Al(OH)3 + 3H2O + 3CO2). 93. The direct factor affecting the surface temperature of the coil and the pressure difference inside the tube is (whether the burner is burning properly). 94. There are two main types of methods for quenching high-temperature pyrolysis gas: one is (direct quenching), and the other is (indirect quenching); the cooling of pyrolysis gas by waste heat boilers falls under (indirect quenching). 95. The two main factors affecting the selectivity of ethylene in the cracking reaction are (evaluation of residence time) and (evaluation of hydrocarbon partial pressure)
91. The chemical bond formed between atoms through the sharing of electron pairs is called a (covalent bond). 92. The principle of action of foam fire extinguishers can be expressed using equations: (Step 1: 3Na2CO3 + Al2(SO4)3 = 3Na2SO4 + Al2(CO3)3; Step 2: Al2(CO3)3 + 6H2O = 2Al(OH)3 + 3H2O + 3CO2). 93. The direct factor affecting the surface temperature of the coil and the pressure difference inside the tube is (whether the burner is burning properly). 94. There are two main types of methods for quenching high-temperature pyrolysis gas: one is (direct quenching), and the other is (indirect quenching); the cooling of pyrolysis gas by waste heat boilers falls under (indirect quenching). 95. The two main factors affecting the selectivity of ethylene in the cracking reaction are (evaluation of residence time) and (evaluation of hydrocarbon partial pressure).