chemical reaction and formula

Chemical Reactions MCQs with Answers

For students preparing for initial academic exams in different branches of the Army, Navy, and Pakistan Air Force (PAF), multiple-choice questions (MCQs) on chemical reactions and chemical formulas are a useful resource. These chemical reactions multiple-choice questions (MCQs) are a vital tool for evaluating the knowledge of PN Cadets, particularly those in the Navy Operation, Navy Supply, and Navy Ordnance branches.

They cover important themes in chemistry. They offer a thorough comprehension of chemical reactions and formulas, which are essential components of chemistry examinations carried out in defense forces academic assessments. Due to their effectiveness and relevancy, these multiple-choice questions have a significant search volume on search engines.

Chemical Reactions and Chemical Formulas MCQ(Part-1)

  • The balanced chemical equation for the reaction between water (H2O) and hydrogen gas (H2) and oxygen gas (O2) is ___H2 + ___O2 → ___H2O. (2, 1, 2)
  • The chemical formula of sodium chloride, commonly known as table salt, is ___. (NaCl)
  • The process by which a substance combines with oxygen and releases energy is called ___. (burning)
  • The law that states that matter cannot be created or destroyed in a chemical reaction is the ___ law of mass. (conservation)
  • The chemical formula of carbon dioxide is ___. (CO2)In the reaction 2H2O → 2H2 + O2, water is ___. (decomposes)
  • The reactants in a chemical equation are usually written on the ___ side of the arrow. (left)
  • The chemical formula of sulfuric acid is ___. (H2SO4)
  • A substance that speeds up a chemical reaction without consuming it is called ___. (catalyst)
  • The process by which a substance gains electrons and its oxidation state decreases is called ___. (reduction)
  • The chemical formula of glucose, or simple sugar, is ___. (C6H12O6)
  • The reaction between an acid and a base to produce salt and water is called a ___ reaction. (neutralization)
  • The balanced chemical equation for the reaction between magnesium (Mg) and hydrochloric acid (HCl) to produce magnesium chloride (MgCl2) and hydrogen gas (H2) is ___Mg + ___HCl → ___MgCl2 + ___H2. (1, 2, 1, 1)
  • The process by which a substance loses oxygen and increases in oxidation state is called ___. (oxidation)
  • The chemical formula of ammonia is ___. (NH3)
  • The decomposition of hydrogen peroxide (H2O2) produces water (H2O) and ___. (oxygen (O2))
  • The decomposition reaction of calcium carbonate (CaCO3) produces calcium oxide (CaO) and ___. (carbon dioxide (CO2))
  • The decomposition of potassium chlorate (KClO3) produces potassium chloride (KCl) and ___. (oxygen (O2))
  • Decomposition of silver nitrate (AgNO3) produces silver (Ag) and ___. (nitrogen dioxide (NO2))
  • Decomposition of sodium bicarbonate (NaHCO3) produces sodium carbonate (Na2CO3), water (H2O) and ___. (carbon dioxide (CO2))
  • The decomposition of ammonium nitrate (NH4NO3) produces water (H2O) and ___. (nitrogen oxide (N2O))

Chemical Reactions and Chemical Formulas MCQs with Answers

A strong understanding of chemical reactions and formulas is essential for job hopefuls wishing to work in branches like the Navy Weapon Engineering Branch and the Navy Education Branch. These chemical reactions and chemical formulas multiple-choice questions (MCQs) provide a focused approach to exam preparation, guaranteeing comprehensive coverage of key chemical ideas.

These chemical reactions and chemical formulas multiple-choice questions are specifically tailored to meet the needs of Pakistan Air Force (PAF) , those seeking positions as officers, and those hoping to advance to PAF civilians jobs. These multiple-choice questions give those competing for jobs in the armed forces a competitive advantage due to their prominence on search engines.

Chemical Reactions and Chemical Formulas MCQ(Part-2)

  • The decomposition of hydrogen sulfide (H2S) produces hydrogen gas (H2) and ___. (sulfur (S))
  • Decomposition of potassium permanganate (KMnO4) produces potassium manganate (K2MnO4) and ___. (oxygen (O2))
  • Decomposition of calcium hydroxide (Ca(OH)2) produces calcium oxide (CaO) and ___. ( water (H2O))
  • The decomposition of sodium chlorate (NaClO3) produces sodium chloride (NaCl) and ___. ( oxygen (O2))
  • The decomposition of hydrogen carbonate (HCO3-) produces water (H2O) and ___. ( carbon dioxide (CO2))
  • The decomposition of lead wire (Pb(NO3)2) produces lead oxide (PbO), nitrogen dioxide (NO2) and ___. (oxygen (O2))
  • The decomposition of potassium chlorite (KClO2) produces potassium chloride (KCl) and ___. (oxygen (O2))
  • The decomposition of silver carbonate (Ag2CO3) produces silver (Ag) and ___. (carbon dioxide (CO2))
  • The decomposition of manganese dioxide (MnO2) produces oxygen (O2) and ___. (manganese (Mn))
  • In a redox reaction, oxidation refers to the ___ of electrons. (loss)
  • In a redox reaction, reduction refers to the ___ of electrons. (strengthening)
  • In a reaction, the reducing agent is a species that ___ electrons. (donated)
  • The oxidizing agent in the redox reaction is a species that ___ electrons. (accept)
  • In the reaction Zn + CuSO4 → ZnSO4 + Cu, zinc (Zn) is ___, while copper (Cu) is ___. (oxidized, reduced)
  • The half-reaction for the oxidation of chloride ions (Cl-) to chlorine gas (Cl2) is ___ → Cl2 + 2e-. (2Cl-)
  • The half reaction for the reduction of hydrogen ions (H+) to hydrogen gas (H2) is ___ + 2H+ + 2e- → H2. (2H+)
  • The half-reaction of iron (Fe) oxidation to iron (III) ions (Fe3+) is ___ → Fe3+ + 3e-. (Fe)
  • The half-reaction for the reduction of gaseous oxygen (O2) to hydroxide ions (OH-) is ___ + 2H2O + 4e- → 4OH-. (O2)
  • The half-reaction of the oxidation of water molecules (H2O) to gaseous oxygen (O2) and hydrogen ions (H+) is ___ → O2 + 4H+ + 4e-. (4H2O)
  • The oxygen number of the element in its elemental form is ___. (0)
  • In a redox reaction, the sum of the oxidation numbers of all the atoms must be ___. (with the same total charge)
  • The chemical equation for the reaction between potassium permanganate (KMnO4) and hydrogen peroxide (H2O2) in an acidic solution is ___ + ___ → ___ + ___ + ___. (KMnO4, H2O2, Mn2+, O2, H2O)

Chemical Reaction MCQ Objective Question

A solid background in chemistry is required for the selection procedure for branches such as the PAF officers and civilians jobs. Chemical formulas and reactions multiple-choice questions (MCQs) offer a comprehensive and easily comprehensible approach to learning the essential subject. These chemical reaction mcq objective questions have a large search volume, are easily accessible, and provide candidates for the Technical Cadet Course with thorough preparation.

These multiple-choice questions are useful not only for the PAF but also for Army Education Officers and Army EME Officers who are getting ready for exams.

Chemical Reactions and Chemical Formulas MCQ(Part-3)

  • The chemical equation for the reaction between sodium sulfide (Na2S) and chlorine gas (Cl2) is ___ + ___ → ___ + ___. (Na2S, Cl2, NaCl, S)
  • The chemical equation for the reaction between aluminum (Al) and copper (II) sulfate (CuSO4) is ___ + ___ → ___ + ___. (Al, CuSO4, Al2(SO4)3, Cu)
  • A reaction in which two or more substances combine to form a single product is called a ___ reaction. (synthesis)
  • The reaction 2H2O2 → 2H2O + O2 is an example of a ___ reaction. (decomposition)
  • A reaction in which one element replaces another element in a compound is called a ___ reaction. (transition)
  • The reaction A + BC → AC + B is an example of a ___ reaction. (one change)
  • A reaction in which a compound breaks down into simpler substances when heat is added is called a ___ reaction. ( thermal decomposition)
  • The reaction CH4 + 2O2 → CO2 + 2H2O is an example of a ___ reaction. (burning)
  • A reaction in which a substance reacts with oxygen and produces energy in the form of light and heat is called a ___ reaction. (burning)
  • The reaction 2NaCl → 2Na + Cl2 is an example of a ___ reaction. (decomposition)
  • A reaction in which a compound breaks down into its elements when an electric current is passed through it is called a ___ reaction. (electrolysis)
  • The reaction N2 + 3H2 → 2NH3 is an example of a ___ reaction. (synthesis)
  • A reaction in which a gas is released when a solid reacts with a liquid is called a ___ reaction. (gas evolution).
  • The reaction Fe + CuSO4 → FeSO4 + Cu is an example of a ___ reaction. ( shift)
  • A reaction in which one reactant is oxidized and another reactant is reduced at the same time is called a ___ reaction. (redox)
  • The reaction Mg + 2HCl → MgCl2 + H2 is an example of a ___ reaction. (one exchange)
  • A reaction in which an acid reacts with a base to form a salt and water is called a ___ reaction. (neutralization)
  • The chemical formula of water is ___. (H2O)The chemical formula of carbon dioxide is ___. (CO2)
  • The chemical formula of methane is ___. (CH4)The chemical formula of sodium chloride is ___. ( NaCl)
  • The chemical formula of ammonia is ___. (NH3)
  • The chemical formula of sulfuric acid is ___. (H2SO4)
  • The chemical formula of glucose is ___. (C6H12O6)

Chemical Reactions and Equations MCQ Questions and Answers

For applicants taking academic exams in all branches of the armed forces, multiple-choice questions pertaining to chemical reactions  and equations mcq questions and answers offer numerous advantages. These multiple-choice questions serve as a resource for citizens looking to join the armed forces, as well as providing the information needed to pass Army Navy exams. These chemical reactions and chemical formulas multiple-choice questions are highly discoverable.

They are also a great resource for anyone getting ready for different kinds of exams. Their use of synonyms for defense forces, academic assessments, and selection procedures guarantees thorough coverage of pertinent subjects.

Chemical Reactions and Chemical Formulas MCQ(Part-4)

  • The chemical formula of hydrochloric acid is ___. (HCl)
  • The chemical formula for sodium bicarbonate (baking soda) is ___. (NaHCO3)
  • The chemical formula of calcium carbonate (limestone) is ___. (CaCO3)
  • The chemical formula of potassium permanganate is ___. (KMnO4)
  • The chemical formula of hydrogen peroxide is ___. (H2O2)
  • The chemical formula for nitric acid is ___. (HNO3)
  • The chemical formula for acetic acid (vinegar) is ___. (CH3COOH)
  • The chemical formula for sulfur dioxide is ___. (SO2)
  • The chemical formula of iron(III) oxide is ___. (Fe2O3)
  • The chemical formula of sodium hydroxide is ___. (NaOH)
  • The chemical formula of potassium chloride is ___. (KCl)
  • The chemical formula of carbon monoxide is ___. (CO)
  • The chemical formula of magnesium sulfate (Epsom salt) is ___. (MgSO4)
  • In a shift reaction, more ___ elements displace less ___ elements from their compound. (reactive, reactive)
  • The reaction Zn + CuSO4 → ZnSO4 + Cu is an example of a ___-change reaction. (one)
  • In the reaction Fe + CuSO4 → FeSO4 + Cu, iron (Fe) is a ___ substance. (reductive)
  • In the reaction Zn + 2HCl → ZnCl2 + H2, zinc (Zn) is ___, while hydrogen (H2) is ___. ( oxidized, reduced)
  • The reaction between magnesium (Mg) and hydrochloric acid (HCl) produces ___ gas. (hydrogen (H2))
  • The reaction between copper (Cu) and silver nitrate (AgNO3) produces ___ metal. (silver (Ag))
  • The exchange reaction between zinc (Zn) and sulfuric acid (H2SO4) produces ___ gas. (hydrogen (H2))

Chemical Reaction and Chemical Formula MCQ Questions

It is impossible to overestimate the importance of chemical reactions and chemical formula mcq questions in defense force academic assessments. These chemical reactions and chemical formula multiple-choice questions are essential for the preliminary evaluation of applicants in all branches, such as the PAF Air Defense Branch, Navy Weapon Engineering Branch, and Navy Education Branch.

Their ability to prepare candidates for the PN Cadet, and Technical Cadet Course is widely acknowledged, which makes them in great demand when it comes to exam preparation. These chemical reactions and chemical formula multiple-choice questions are a priceless tool for anyone looking to join the Pakistan Air Force, Army, or Navy because of their emphasis on high search volume keywords and SEO optimization.

Chemical Reactions and Chemical Formulas MCQ(Part-5)

  • The reaction between aluminum (Al) and iron chloride (FeCl3) produces aluminum chloride (AlCl3) and ___ metal. (iron (Fe))
  • During the exchange reaction of copper (Cu) and iron(II) sulfate (FeSO4), copper(II) sulfate (CuSO4) and ___ metal are formed. (iron (Fe))
  • The reaction between zinc (Zn) and silver nitrate (AgNO3) produces zinc nitrate (Zn(NO3)2) and ___ metal. (silver (Ag))
  • During the reaction of magnesium (Mg) and copper (II) sulfate (CuSO4), magnesium sulfate (MgSO4) and ___ metal are formed. (copper (Cu))
  • The reaction between aluminum (Al) and hydrochloric acid (HCl) produces ___ gas. (hydrogen (H2))
  • During the exchange reaction of iron (Fe) and copper (II) sulfate (CuSO4), iron sulfate (FeSO4) and ___ metal are formed. (copper (Cu))
  • The reaction between zinc (Zn) and hydrochloric acid (HCl) produces ___ gas. (hydrogen (H2))
  • During the reaction of magnesium (Mg) and iron (II) sulfate (FeSO4), magnesium sulfate (MgSO4) and ___ metal are formed. (iron (Fe)).

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