𝑬𝑻- 𝑴𝒂𝒕𝒉𝒔 𝑵𝒆𝒕𝒘𝒐𝒓𝒌

1) Which of the following is the definition of electrochemistry? a) The study of chemical reactions involving electricity b) The study of the movement of electrons c) The study of electrical charges d) The study of electrical conductors 2) What is an electrochemical cell? a) A device that converts electrical energy into chemical energy b) A device that converts chemical energy into electrical energy c) A device that stores electrical energy d) A device that generates heat through chemical reactions 3) What is an oxidation-reduction (redox) reaction? a) A reaction involving the transfer of protons b) A reaction involving the transfer of electrons c) A reaction involving the transfer of neutrons d) A reaction involving the transfer of positrons 4) Which species is reduced in a redox reaction? a) The species that gains electrons b) The species that loses electrons c) The species that gains protons d) The species that loses protons 5) What is the standard electrode potential? a) The potential difference between two half-cells under standard conditions b) The potential difference between two full cells under standard conditions c) The potential difference between a half-cell and a full cell under standard conditions d) The potential difference between two electrodes in any conditions 6) Which of the following is a standard hydrogen electrode? a) A platinum electrode in contact with a solution of hydrogen ions at 1 M concentration b) A platinum electrode in contact with a solution of hydrogen gas at 1 atm pressure c) A platinum electrode in contact with a solution of hydrogen gas at 1 M concentration d) A platinum electrode in contact with a solution of hydrogen ions at 1 atm pressure 7) What is the oxidation state of an atom in its elemental form? a) 0 b) 1 c) +1 d) -1 8) In a galvanic cell, where does oxidation occur? a) At the anode b) At the cathode c) In the salt bridge d) At both the anode and the cathode 9) Which of the following is an example of a primary battery? a) Alkaline battery b) Lithium-ion battery c) Lead-acid battery d) Carbon-zinc battery 10) What is the purpose of a salt bridge in an electrochemical cell? a) To allow the flow of electrons b) To prevent the mixing of reactants c) To maintain charge balance d) To regulate the temperature 11) Which of the following is the unit of electric charge? a) Ampere b) Volt c) Coulomb d) Ohm 12) What is Faraday's constant? a) The charge of one electron b) The number of electrons in one mole of substance c) The charge of one mole of electrons d) The number of moles in one gram of substance 13) What is the unit of electric potential? a) Ohm b) Joule c) Volt d) Ampere 14) Which of the following is the equation for calculating cell potential? a) Ecell = Ered - Eox b) Ecell = Ered + Eox c) Ecell = Eox - Ered d) Ecell = Eox + Ered 15) Which of the following is an example of a non-spontaneous electrochemical reaction? a) Electroplating b) Corrosion of iron c) Electrolysis of water d) Generation of electricity in a battery 16) What happens to the cell potential if the concentration of a reactant in a half-cell increases? a) The cell potential increases b) The cell potential decreases c) The cell potential remains unchanged d) The cell potential cannot be determined 17) Which of the following is an example of an electrolyte? a) Water b) Oxygen gas c) Sodium chloride solution d) Copper wire 18) What is the purpose of an inert electrode in an electrochemical cell? a) To facilitate the reaction at the electrode b) To prevent unwanted side reactions c) To supply excess electrons d) To maintain the pH of the solution 19) What is the product of the oxidation of water during electrolysis? a) Oxygen gas b) Hydrogen gas c) Sodium chloride d) Potassium hydroxide 20) What is the purpose of a voltmeter in an electrochemical cell? To measure the: a) electric current b) electric potential difference c) charge transfer d) resistance Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

1) Which of the following is the definition of electrochemistry? a) The study of chemical reactions involving electricity b) The study of the movement of electrons c) The study of electrical charges d) The study of electrical conductors 2) What is an electrochemical cell? a) A device that converts electrical energy into chemical energy b) A device that converts chemical energy into electrical energy c) A device that stores electrical energy d) A device that generates heat through chemical reactions 3) What is an oxidation-reduction (redox) reaction? a) A reaction involving the transfer of protons b) A reaction involving the transfer of electrons c) A reaction involving the transfer of neutrons d) A reaction involving the transfer of positrons 4) Which species is reduced in a redox reaction? a) The species that gains electrons b) The species that loses electrons c) The species that gains protons d) The species that loses protons 5) What is the standard electrode potential? a) The potential difference between two half-cells under standard conditions b) The potential difference between two full cells under standard conditions c) The potential difference between a half-cell and a full cell under standard conditions d) The potential difference between two electrodes in any conditions 6) Which of the following is a standard hydrogen electrode? a) A platinum electrode in contact with a solution of hydrogen ions at 1 M concentration b) A platinum electrode in contact with a solution of hydrogen gas at 1 atm pressure c) A platinum electrode in contact with a solution of hydrogen gas at 1 M concentration d) A platinum electrode in contact with a solution of hydrogen ions at 1 atm pressure 7) What is the oxidation state of an atom in its elemental form? a) 0 b) 1 c) +1 d) -1 8) In a galvanic cell, where does oxidation occur? a) At the anode b) At the cathode c) In the salt bridge d) At both the anode and the cathode 9) Which of the following is an example of a primary battery? a) Alkaline battery b) Lithium-ion battery c) Lead-acid battery d) Carbon-zinc battery 10) What is the purpose of a salt bridge in an electrochemical cell? a) To allow the flow of electrons b) To prevent the mixing of reactants c) To maintain charge balance d) To regulate the temperature 11) Which of the following is the unit of electric charge? a) Ampere b) Volt c) Coulomb d) Ohm 12) What is Faraday's constant? a) The charge of one electron b) The number of electrons in one mole of substance c) The charge of one mole of electrons d) The number of moles in one gram of substance 13) What is the unit of electric potential? a) Ohm b) Joule c) Volt d) Ampere 14) Which of the following is the equation for calculating cell potential? a) Ecell = Ered - Eox b) Ecell = Ered + Eox c) Ecell = Eox - Ered d) Ecell = Eox + Ered 15) Which of the following is an example of a non-spontaneous electrochemical reaction? a) Electroplating b) Corrosion of iron c) Electrolysis of water d) Generation of electricity in a battery 16) What happens to the cell potential if the concentration of a reactant in a half-cell increases? a) The cell potential increases b) The cell potential decreases c) The cell potential remains unchanged d) The cell potential cannot be determined 17) Which of the following is an example of an electrolyte? a) Water b) Oxygen gas c) Sodium chloride solution d) Copper wire 18) What is the purpose of an inert electrode in an electrochemical cell? a) To facilitate the reaction at the electrode b) To prevent unwanted side reactions c) To supply excess electrons d) To maintain the pH of the solution 19) What is the product of the oxidation of water during electrolysis? a) Oxygen gas b) Hydrogen gas c) Sodium chloride d) Potassium hydroxide 20) What is the purpose of a voltmeter in an electrochemical cell? To measure the: a) electric current b) electric potential difference c) charge transfer d) resistance Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

Chemistry Questions Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

✅Common physical quantities along with their corresponding SI units: 1. Length - Meter (m) 2. Mass - Kilogram (kg) 3. Time - Second (s) 4. Electric Current - Ampere (A) 5. Temperature - Kelvin (K) 6. Amount of Substance - Mole 7. Luminous Intensity - Candela ════════════════ 8. Area - Square meter (m2) 9. Volume - Cubic meter (m^3) 10. Speed - Meter/second (m/s) 11. Acceleration - Meter per second squared (m/s^2) 12. Force - Newton (N) 13. Energy - Joule (J) 14. Power - Watt (W) 15. Electric Charge - Coulomb 16. Electric Potential - Volt (V) 17. Electric Resistance - Ohm (Ω) 18. Frequency - Hertz (Hz) 19. Pressure - Pascal (Pa) 20. Density - Kilogram/ cubic meter (kg/m^3) Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

እስቲ ወደ ልጅነትህ ተመለስ! Rewind the clock to the wonder years! ልጅ እያለህ መዳህ ማን አስተማረህ ? መንቀሳቀስ እንዳለብህ ከቦታ ቦታ መሄድ እንደምትችል ማነው ያሳወቀህ? እናትህ ፣ አባትህ ፣ ወንድምህ ወይስ አህት ወይስ ሌላ ሰው? በፍፁም ይሄንን የነገረህ የለም ግን ደግሞ አሳይተውኋል አይደል? ሲንቀሳቀሱ አይተህ አንተም መሄድ መቻል እንዳለብህ ተሰማህ ግን እግርህ ለመራመድ ስላልጠነከረ ጉልበትህን እና እጅህን አጣምረህ የምትፈልገውን አሳካህ ምናልባት መሬቱ ይዋጋ ነበር ጉልበትህ ቅዝቃዜው ኮሮኮንቹ ብቻ ብዙ ምቾት ሲነሳው የነበረን ነገር ተቋቁሞ ያለማንም እርዳታ ህልምህን ስታሳካ ነበር። አይደል? ለመቆም ስትጠነክርስ ማን አሳወቀህ? አሁንም ማንም አደል? ግን ብዙ አልወደቅህም? ብዙ አላባበሉህም? ታድያ እንደዛ ስትወድቅ ስትነሳ ስትታመም ተስፋ ቆርጠህ መራመድ ይቅርብኝ ብለህ ትተኸዋል? በፍፁም! አይደል? አቤት መራመድ የጀመርክ ቀን እማ ማን ይቻልህ እዚም እዛም ስጥሮጥ ስትፈነጭ እንደ አንተ የሚታይ ማን ነበረ! አየህ የህይወትህን የመጀመሪያ ትግል ድል ያደረግኸውና ራስህን ችለህ መቆም የቻልከው እኮ ገና ያኔ ነው እንደዛ ቀን ከዛ በፊት ተደስተህ አታውቅም ያ ቀን ግን ደስታን አስተማረህ የሰው ልጅ የመቀየር የማደግ ለውጥ የመፍጠር የማሸነፍ ፍላጎት አብሮት ተፀንሶ አብሮት የተወለደ ነገር ነው መቼም ቢሆን መቆም አይፈልግም። ታድያ ያኔ የነበረህ የልጅነት ጥንካሬ በህመም ውስጥ ማሸነፍ ብቻ ቆሞ ድል የማድረግ ማንነት በላይ ትምህርት ቤት እና እንደምትችል ማሳያ ምን አለ!? የድል ምሽት ተመኘን 🙏 Join🔻 ══════════════ • https://t.me/ETMathsNetwork •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

#Update የ2016 ዓ.ም የ12ኛ ክፍል ብሔራዊ ፈተና በሰኔ ወር እንደሚሰጥ የትምህርት ምዘናና ፈተናዎች አገልግሎት አሳውቋል። በዚህ ዓመት የሚሰጠውን የ12ኛ ክፍል ሀገር አቀፍ ፈተና ለመውሰድ ከ670 ሺህ በላይ ተማሪዎች ምዝገባ ማድረጋቸውን የአገልግሎቱ ዋና ዳይሬክተር እሸቱ ከበደ (ዶ/ር) በቅርቡ መግለፃቸው ይታወሳል፡፡ የፀጥታ ችግር ካለባቸው አካባቢዎች በስተቀር በአብዛኛው የአገሪቱ አካባቢዎች የተማሪዎች ምዝገባ መጠናቀቁም ተገልጿል። የፈተናው ሕትመት በቀጣይ ቀናት እንደሚጀመር ለኢሳት የገለፁት ዋና ዳይሬክተሩ፤ የ2016 ዓ.ም የ12ኛ ክፍል መልቀቂያ ፈተና በሰኔ ወር እንደሚሰጥም አረጋግጠዋል፡፡ ለ3ኛ ጊዜ በዩኒቨርሲቲዎች ውስጥ የሚሰጠው ብሔራዊ ፈተናው፤ ዘንድሮ ለተፈጥሮ ሳይንስ እና ማኅበራዊ ሳይንስ የትምህርት መስኮች ለእያንዳንዳቸው በስድስት የትምህርት አይነቶች እንዲሰጥ ትምህርት ሚኒስቴር መወሰኑ አይዘነጋም፡፡ Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

የሚኒስትሪ መልስ መስጫ ወረቀት አጠቃቀም መመሪያ ለተማሪዎች 1.የተማሪዎች መለያ ቁጥር እና የትምህርት ዓይነት መለያ ቁጥር ለእያንዳንዳቸው በተቀመጠው ሳጥን ውስጥ ከላይ ወደ ታች መፃፍ አለበት፡፡ 2.በተፃፈው መለያ ቁጥር ፊት ለፊት የተፃፈውን ቁጥር የያዘውን ክብ ብቻ መጠቆር አለበት፡፡ 3.ተማሪዎች የመረጡትን መልስ ትይዩ በተሰጠው ክብ ላይ በትክክል ማጥቆር አለባቸው፡፡ 4.ተማሪዎች ያጠቆሩትን መልስ መቀየር ቢፈልጉ መጀመሪያ ያጠቆሩትን ክብ በደንብ ማጥፋት አለባቸው፡፡ 5. በአንድ ረድፍ ከአንድ በላይ ክብ ማጥቆር የተከለከለ ነው፡፡ 6) ለመፃፍ እና ለማጥቆር ከተፈቀደው ቦታ ውጭ ምንም አይነት ፅሁፍም ሆነ ጭረት ማድረግ የተከለከለ ነው፡፡ 7.ለመፃፍ ከተፈቀደው ቦታ ውጭ ተፅፎ ወይም ትንሽ ጭረት እና ነጥብ ከተገኘ የመልስ መስጫ ወረቀቱ ሙሉ  በሙሉ ተቀባይነት አይኖረውም፡፡ 8.መልስ መስጫ ኮርነር ላይ ያሉትን አራት ጠርዞች መንካትም ፈጽሞ የተከለከለ ነው፡፡ 9. ተፈታኞች የመልስ መስጫ ወረቀታቸውን በንፅህና መያዝ አለባቸው ማለትም እንዳይቆሽሽ፣ እርጥበት  እንዳይነካው፤ እንዳይቀደድ እና እንዳይታጠፍ መጠንቀቅና ሙሉ ኃላፊነት መውሰድ አለባቸው፡፡ Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

20 English grammar questions: 1. Which sentence is grammatically correct? a) He don't like to eat vegetables. b) He doesn't like to eat vegetables. c) He not like to eat vegetables. d) He isn't like to eat vegetables. 2. Choose the correct form of the verb: "She _ to the store every day." a) go b) goes c) going d) went 3. Which sentence is punctuated correctly? a) The cat, sat on the mat. b) The cat sat, on the mat. c) The cat sat on the mat. d) The, cat sat on the mat. 4. Identify the error in this sentence: "He goed to the store yesterday." a) The subject-verb agreement is incorrect. b) The tense of the verb is incorrect. c) There is a spelling mistake. d) The sentence is punctuated incorrectly. 5. Choose the correct possessive form: "That is _ book." a) hers b) her's c) hers' d) her 6. Which sentence is grammatically correct? a) They're going too the beach. b) Their going to the beach. c) They are going to the beach. d) They're going to the beach. 7. Identify the adverb in this sentence: "She spoke softly." a) She b) Spoke c) Softly d) Spoke softly 8. Choose the correct form of the verb: "He ____ very fast." a) run b) runs c) running d) ran 9. Which sentence uses correct subject-verb agreement? a) The dog barked loudly. b) The dog bark loudly. c) The dogs barks loudly. d) The dogs barked loudly. 10. Choose the correct form of the comparative adjective: "This car is _ than that one." a) good b) better c) best d) gooder 11. Identify the coordinating conjunction in this sentence: "She wanted to swim, but it was too cold." a) wanted b) swim c) but d) cold 12. What is the plural form of "mouse"? a) mouses b) mice c) mices d) mouse 13. Which sentence is grammatically correct? a) Whose going to the party tonight? b) Who's going to the party tonight? c) Whos going to the party tonight? d) Whose going too the party tonight? 14. Choose the correct form of the verb: "They _ lunch at noon." a) eat b) eats c) ate d) eating 15. Identify the preposition in this sentence: "The cat jumped over the fence." a) cat b) jumped c) over d) fence 16. Which sentence uses correct punctuation? a) Do you want to go to the movies, or stay home? b) Do you want to go to the movies or stay home? c) Do you want to go to the movies; or stay home? d) Do you want to go to the movies or, stay home? 17. Choose the correct form of the possessive noun: "The _ car is mine." a) girls' b) girl's c) girls d) girl 18. Which sentence is grammatically correct? a) They're going too fast. b) Their going too fast. c) They are going too fast. d) There going too fast. 19. Identify the conjunction in this sentence: "I like both apples and oranges." a) like b) both c) and d) oranges 20. Choose the correct form of the verb: "She _ her homework every evening." a) do b) does c) doing d) did Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

Trivia Moment 🎓 Welcome to Trivia Moment! Explore, think, and discover with us! 🚀🌍 🧠 Trivia Moment sparks curiosity, knowledge, and collaboration. Let's learn and grow together! 📚💡 Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

Questions about heart: 1. Which part of the heart receives blood returning from the body and lungs?    a) Atria    b) Ventricles    c) Valves    d) Septum 2. What is the main function of the ventricles?    a) Receive blood returning to the heart    b) Pump blood out of the heart to the body and lungs    c) Regulate blood flow    d) Prevent blood from flowing backward 3. Which structure prevents oxygen-rich and oxygen-poor blood from mixing in the heart?    a) Atria    b) Ventricles    c) Valves    d) Septum 4. Which blood vessels supply oxygen-rich blood to the heart muscle itself?    a) Coronary arteries    b) Pulmonary arteries    c) Aorta    d) Pulmonary veins 5. Which is the largest artery in the body, carrying oxygen-rich blood from the heart to the rest of the body?    a) Coronary artery    b) Pulmonary artery    c) Aorta    d) Carotid artery Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

👆👆👆👆👆👆👆👆👆 ✅ Questions about plant cells: Do it! 1. Which organelle is responsible for photosynthesis in plant cells?    a) Chloroplast    b) Mitochondrion    c) Golgi apparatus    d) Endoplasmic reticulum 2. What is the function of the cell wall in plant cells?    a) To provide support and protection    b) To regulate the movement of substances in and out of the cell    c) To synthesize proteins    d) To store nutrients 3. Which structure is responsible for storing water, nutrients, and waste in plant cells?    a) Vacuole    b) Nucleus    c) Ribosome    d) Lysosome 4. Which organelle is responsible for cellular respiration in plant cells?    a) Mitochondrion    b) Chloroplast    c) Endoplasmic reticulum    d) Golgi apparatus 5. What is the primary function of the chloroplast?    a) Cellular respiration    b) Protein synthesis    c) Photosynthesis    d) Lipid synthesis Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

Chemistry Questions 1. What is the chemical symbol for sodium?    a) Na    b) So    c) Sn    d) Sd 2. Which of the following elements is a metalloid?    a) Oxygen    b) Silicon    c) Sodium    d) Chlorine 3. What is the atomic number of carbon?    a) 6    b) 12    c) 14    d) 16 4. Which of the following is a chemical property?    a) Density    b) Melting point    c) Reactivity    d) Color 5. What is the charge of a proton?    a) +1    b) -1    c) 0    d) +2 6. How many valence electrons does oxygen have?    a) 2    b) 6    c) 8    d) 4 7. Which of the following is a homogenous mixture?    a) Saltwater    b) Sand and water    c) Oil and vinegar    d) Iron filings and sulfur powder 8. What is the formula for calculating density?    a) D = m/v    b) D = v/m    c) D = m + v    d) D = m - v 9. What is Avogadro's number?    a) 6.02 x 10^23    b) 6.02 x 10^22    c) 6.02 x 10^24    d) 6.02 x 10^21 10. Which of the following is a noble gas?     a) Nitrogen     b) Neon     c) Fluorine     d) Sulfur 11. What is the pH of a neutral solution?     a) 7     b) 0     c) 14     d) -7 12. What is the chemical formula for sulfuric acid?     a) H2SO4     b) HCl     c) HNO3     d) NaOH 13. What is the process of a solid turning directly into a gas called?     a) Sublimation     b) Evaporation     c) Condensation     d) Deposition 14. Which subatomic particle is responsible for chemical bonding?     a) Proton     b) Electron     c) Neutron     d) Nucleus 15. What is the lightest element in the periodic table?     a) Hydrogen     b) Helium     c) Lithium     d) Carbon 16. Which of the following is an example of a chemical change?     a) Melting ice     b) Cutting paper     c) Burning wood     d) Dissolving salt in water 17. What is the formula for potassium chloride?     a) KCl     b) KOH     c) K2CO3     d) KNO3 18. What is the chemical formula for ammonia?     a) NH3     b) H2O     c) CH4     d) CO2 19. Which of the following is a non-metal?     a) Sodium     b) Calcium     c) Oxygen     d) Iron 20. What is the SI unit for energy?     a) Joule     b) Watt     c) Kilogram     d) Newton Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

Chemistry Questions 1. What is the chemical symbol for sodium?    a) Na    b) So    c) Sn    d) Sd 2. Which of the following elements is a metalloid?    a) Oxygen    b) Silicon    c) Sodium    d) Chlorine 3. What is the atomic number of carbon?    a) 6    b) 12    c) 14    d) 16 4. Which of the following is a chemical property?    a) Density    b) Melting point    c) Reactivity    d) Color 5. What is the charge of a proton?    a) +1    b) -1    c) 0    d) +2 6. How many valence electrons does oxygen have?    a) 2    b) 6    c) 8    d) 4 7. Which of the following is a homogenous mixture?    a) Saltwater    b) Sand and water    c) Oil and vinegar    d) Iron filings and sulfur powder 8. What is the formula for calculating density?    a) D = m/v    b) D = v/m    c) D = m + v    d) D = m - v 9. What is Avogadro's number?    a) 6.02 x 10^23    b) 6.02 x 10^22    c) 6.02 x 10^24    d) 6.02 x 10^21 10. Which of the following is a noble gas?     a) Nitrogen     b) Neon     c) Fluorine     d) Sulfur 11. What is the pH of a neutral solution?     a) 7     b) 0     c) 14     d) -7 12. What is the chemical formula for sulfuric acid?     a) H2SO4     b) HCl     c) HNO3     d) NaOH 13. What is the process of a solid turning directly into a gas called?     a) Sublimation     b) Evaporation     c) Condensation     d) Deposition 14. Which subatomic particle is responsible for chemical bonding?     a) Proton     b) Electron     c) Neutron     d) Nucleus 15. What is the lightest element in the periodic table?     a) Hydrogen     b) Helium     c) Lithium     d) Carbon 16. Which of the following is an example of a chemical change?     a) Melting ice     b) Cutting paper     c) Burning wood     d) Dissolving salt in water 17. What is the formula for potassium chloride?     a) KCl     b) KOH     c) K2CO3     d) KNO3 18. What is the chemical formula for ammonia?     a) NH3     b) H2O     c) CH4     d) CO2 19. Which of the following is a non-metal?     a) Sodium     b) Calcium     c) Oxygen     d) Iron 20. What is the SI unit for energy?     a) Joule     b) Watt     c) Kilogram     d) Newton Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋

Chemistry Questions Join🔻 ══════════════ • https://t.me/ETMathsNetwork • Don't forget to react and share. •♥•♥ Many Thanks ♥•♥• 𝐃𝐈𝐆𝐈𝐓𝐀𝐋 𝐄𝐃𝐔𝐂𝐀𝐓𝐈𝐎𝐍 𝐅𝐎𝐑 𝐀𝐋𝐋