Chemical Reactions and Equations

Which of the following represents the balanced equation for $Ag + Cl_2 \rightarrow AgCl$?

In the reaction $CaO(s) + H_2O(l) \rightarrow Ca(OH)_2(aq)$, what is $CaO$ called?

What is the formula for Nitric acid used in equations?

Which symbol represents a reversible reaction?

What is the coefficient of $HCl$ when balancing $Al(OH)_3 + HCl \rightarrow AlCl_3 + H_2O$?

In the reaction $Zn + CuSO_4 \rightarrow ZnSO_4 + Cu$, which substance is the oxidizing agent?

What is the balanced equation for the decomposition of Ferrous Sulfate?

In the chemical equation $3Fe(s) + 4H_2O(g) \rightarrow Fe_3O_4(s) + 4H_2(g)$, the notation $(g)$ with $H_2O$ indicates that:

In the reaction $CuO + H_2 \rightarrow Cu + H_2O$, which substance acts as the oxidizing agent?

Which of the following is NOT an endothermic reaction?

In the reaction $3Fe + 4H_2O \rightarrow Fe_3O_4 + 4H_2$, the number of Iron atoms is:

Which of the following is balanced?

What is the coefficient of $HCl$ in the balanced equation $PbO_2 + 4HCl \rightarrow PbCl_2 + 2H_2O + Cl_2$?

How many oxygen atoms are in the products of the equation: $2Pb(NO_3)_2 \rightarrow 2PbO + 4NO_2 + O_2$?

What are the coefficients $a, b, c$ for the reaction $aK + bH_{2}O \rightarrow cKOH + H_{2}$?

In the equation $Mg_{3}N_{2} + 6H_{2}O \rightarrow 3Mg(OH)_{2} + xNH_{3}$, what is the value of $x$?

To balance the reaction $SiCl_{4} + H_{2}O \rightarrow SiO_{2} + HCl$, what coefficient should be placed before $HCl$?

In the balanced equation $xZn + yHNO_3 (very \, dilute) \rightarrow xZn(NO_3)_2 + NH_4NO_3 + 3H_2O$, what is the value of $y$?

Balance the following equation: $FeCl_3 + MgO \rightarrow Fe_2O_3 + MgCl_2$. The sum of all coefficients is:

What is the coefficient of $O_2$ in the balanced equation: $NH_3 + O_2 \rightarrow N_2 + H_2O$?

The process of rusting of iron involves:

The gas that turns lime water milky is:

Which chemical equation represents a double displacement reaction?

When lead nitrate reacts with potassium iodide, the yellow precipitate formed is:

What is the color of the precipitate formed when Barium Chloride reacts with Aluminium Sulphate?

A balanced chemical equation is based on which law?

In the displacement reaction between zinc and copper sulphate, zinc is:

Which of the following decomposition reactions is used in the manufacturing of cement?

A salt 'X' on heating gives a brown colored gas 'Y' and a yellow residue 'Z'. The gas 'Y' when dissolved in water forms an acidic solution. Identify 'X'.

A student added Zinc granules to Copper Sulfate solution. After sometime, the blue color of the solution becomes colorless. The colorless solution is of:

Which of the following best describes the physical state of $NaCl$ in the equation $NaOH(aq) + HCl(aq) \rightarrow NaCl(aq) + H_{2}O(l)$?

Which of the following is the correct representation of magnesium burning in oxygen?

In the reaction $A + B \rightarrow C + D$, which side contains the reactants?

How many hydrogen atoms are present in $2H_{2}O$?

What are the stoichiometric coefficients $a, b, c,$ and $d$ for the reaction: $aMg_{3}N_{2} + bH_{2}O \rightarrow cMg(OH)_{2} + dNH_{3}$?

What is the physical state of $Zn$ and $H_{2}SO_{4}$ usually represented as in the reaction $Zn + H_{2}SO_{4} \rightarrow ZnSO_{4} + H_{2}$?

Identify the balanced equation for the photolytic decomposition of Silver Bromide.

When Ammonium Dichromate $(NH_4)_2Cr_2O_7$ is heated, it decomposes into Nitrogen, water vapor, and Chromium(III) oxide. What is the sum of the coefficients of the products in the balanced equation?

The decomposition of limestone is an endothermic reaction. Which equation correctly shows the state symbols and the heat requirement?

What are the correct coefficients for the reaction: $aXeF_6 + bH_2O \rightarrow cXeO_3 + dHF$?

Which gas is passed through lime water to turn it milky?

In the reaction $PbO + C \rightarrow Pb + CO$, which substance is the reducing agent?

The reaction between potassium chloride and silver nitrate is an example of:

Which of the following is a balanced combination reaction?

A student conducts an experiment by mixing solid Barium hydroxide ($Ba(OH)_{2}$) and Ammonium chloride ($NH_{4}Cl$) in a test tube. Based on the observations shown in the flowchart, identify the nature of the reaction and the gas evolved.

When magnesium ribbon is burnt in air, it is cleaned first by rubbing with sandpaper to:

Which of the following gases can be used for the storage of fresh samples of oil for a long time?

Which of the following chemical reactions represents the burning of magnesium in an atmosphere of nitrogen?

When an aqueous solution of sodium sulphate is mixed with an aqueous solution of barium chloride, a white precipitate is formed immediately. This reaction is:

Identify the substance oxidized in the reaction: $H_{2}S + Cl_{2} \rightarrow 2HCl + S$.

Which of the following is a redox reaction?

Reduction is also defined as the:

Cooking of food is considered endothermic because:

The conversion of $Cu^{2+}$ to $Cu$ involves:

Chromium metal can be extracted using the following reaction: $Cr_{2}O_{3} + 2Al \rightarrow Al_{2}O_{3} + 2Cr$. Study the oxygen transfer process in the diagram and identify which substance acts as the oxidizing agent.

When a student mixes Barium hydroxide crystals with Ammonium chloride in a test tube, the temperature of the beaker drops significantly and it feels cold to the touch. Based on the energy flow shown in the diagram, identify the type of process taking place.

In the reaction $Zn + H_{2}SO_{4} \rightarrow ZnSO_{4} + H_{2}$, zinc is being:

In a laboratory experiment, dry ammonia gas is passed over heated copper(II) oxide. The black powder gradually turns into a reddish-brown solid, and a colorless gas is evolved that does not support combustion. The reaction is represented as: $3CuO(s) + 2NH_{3}(g) \rightarrow 3Cu(s) + N_{2}(g) + 3H_{2}O(g)$. Based on this process, which statement correctly identifies the redox roles?

When $CO_{2}$ is reduced by hot Coke ($C$), the product is:

Which of the following correctly pairs the process with its energy change?

The decomposition of vegetable matter into compost is an example of an:

The white precipitate of $BaSO_4$ is formed by the reaction of:

Identify the type of reaction: $Pb(s) + CuCl_2(aq) \rightarrow PbCl_2(aq) + Cu(s)$

In a displacement reaction, a _____ reactive element displaces a _____ reactive element from its compound.

A student performs an experiment by placing a copper wire in a colorless solution of silver nitrate ($AgNO_{3}$). After some time, it is observed that the solution turns blue and a shiny grey deposit forms on the wire. Which of the following statements correctly identifies the type of reaction and the cause of the color change?

What happens when copper powder is heated in a china dish?

Calcium oxide reacts vigorously with water to produce slaked lime. This reaction can be classified as: (i) Combination reaction (ii) Exothermic reaction (iii) Endothermic reaction (iv) Oxidation reaction

A student performs a series of experiments starting with a solid 'P' as shown in the flowchart below. A colorless gas 'Q' is evolved, leaving behind a residue 'R'. Gas 'Q' is then passed through an aqueous solution 'S', forming a white precipitate 'T'. When more gas 'Q' is bubbled through the mixture in the presence of water, the precipitate 'T' dissolves to form a clear solution 'U'. Identify the correct statement regarding these substances and reactions.

A shiny brown element 'X' on heating in air becomes black in color. Name the element 'X' and the black colored compound formed.

Which of the following is a redox reaction but NOT a combination reaction?

A substance 'X' is used for whitewashing walls. What is 'X'?

Why is nitrogen gas used in food packaging?

The gain of electrons by a substance is known as:

What is the coefficient of $O_2$ in the balanced equation for the combustion of propane: $C_3H_8 + ?O_2 \rightarrow 3CO_2 + 4H_2O$?

In the balanced chemical equation $3Fe(?) + 4H_2O(?) \rightarrow Fe_3O_4(?) + 4H_2(?)$, iron reacts with steam. Which set of symbols correctly represents the physical states of the reactants and products in this specific condition?

A student adds dilute sulphuric acid to a test tube containing iron sulphide ($FeS$). A gas is evolved which has a characteristic smell of rotten eggs. Which of the following is the correct identity of the gas?

The reaction $2H_2(g) + O_2(g) \rightarrow 2H_2O(l) + \text{Heat}$ can be classified as which of the following types of reactions? (i) Combination reaction (ii) Exothermic reaction (iii) Oxidation-Reduction (Redox) reaction (iv) Decomposition reaction

In the industrial preparation of nitric acid, the first step involves the catalytic oxidation of ammonia. The unbalanced equation for this reaction is: $NH_3(g) + O_2(g) \rightarrow NO(g) + H_2O(g)$. After balancing this equation with the simplest whole number coefficients, determine the sum of the coefficients of the products and the type of chemical reaction occurring.

The reaction $C + O_2 \rightarrow CO_2 + \text{Heat}$ is a:

When lead nitrate solution is mixed with potassium iodide solution, a yellow precipitate is formed. Name the compound responsible for the yellow color.

Identify the type of reaction: $2AgCl(s) \xrightarrow{Sunlight} 2Ag(s) + Cl_{2}(g)$

In the balanced equation $aFe + bH_{2}O \rightarrow cFe_{3}O_{4} + dH_{2}$, what is the value of 'a'?

Which of the following metals does not corrode easily?

Substances that prevent oxidation are called _________.

When aqueous solutions of silver nitrate ($AgNO_{3}$) and sodium chloride ($NaCl$) are mixed, a white insoluble substance is formed immediately. This process is summarized in the flowchart below. Which option correctly identifies the reaction type and the chemical formula of the white precipitate?

A student bubbles chlorine gas ($Cl_{2}$) into a test tube containing a colorless solution of potassium iodide ($KI$). After a few minutes, the solution turns a distinct brown color. Based on this observation, identify the type of reaction that occurred and the substance responsible for the brown color.

In the reaction $CuO + H_{2} \xrightarrow{Heat} Cu + H_{2}O$, which of the following is the reducing agent?

In the Thermite process, iron oxide reacts with aluminum to produce molten iron. The type of reaction and the role of aluminum are:

Which of the following reactions can be classified as a thermal decomposition?

The reaction of burning a magnesium ribbon in air is a combination reaction because:

What is the color of the precipitate formed by the reaction of Sodium Sulphate and Barium Chloride?

Fatty foods change their smell and taste when left for a long time due to:

The process of tarnishing of silver is due to the formation of:

The substance that undergoes change in a chemical reaction is called a:

When an antacid tablet containing Magnesium hydroxide ($Mg(OH)_2$) reacts with the Hydrochloric acid ($HCl$) in the stomach, it forms Magnesium chloride and water. This reaction can be classified as which type of chemical reaction?

The diagram below illustrates a combination reaction used to synthesize ammonia industrially. Which of the following is the correctly balanced chemical equation for this specific process?

In the experimental setups shown in the diagram, a student places a metal in a solution of Copper Sulfate. In which of the setups will a chemical reaction be observed through a change in the color of the solution?

Which of the following is a thermal decomposition reaction?

The term 'Rancidity' is related to the oxidation of:

In the reaction $Fe_{2}O_{3} + 2Al \rightarrow Al_{2}O_{3} + 2Fe$, the process where $Al$ becomes $Al_{2}O_{3}$ is called:

Which of these gases is highly flammable?

The decomposition of water is an:

During electrolysis, $H^+$ ions move towards the:

Which gas is produced in the ratio of 2 parts by volume in the electrolysis of water?

During the electrolysis of water, the volume of one gas collected is double the volume of the other. If a student uses a Hoffman voltameter and observes $30\text{ cm}^{3}$ of gas at the negative electrode and $15\text{ cm}^{3}$ at the positive electrode, which gas is produced in the $30\text{ cm}^{3}$ quantity?

During the electrolysis of water, if 32g of Oxygen is produced, what is the mass of Hydrogen produced?

Which scientist first demonstrated the electrolysis of water?

The gas collected at the anode is used in:

If the current passed through the water is doubled for the same duration, the volume of gases produced will:

How many water molecules must decompose to produce 5 molecules of Oxygen gas?