Balanced Chemical Equation

Q.

Sodium chloride reacts with silver nitrate to produce silver chloride and sodium nitrate

(a) Write the equation.

(b) Check whether it is balanced, if not balance it.

(c) Find the weights of reactants and products.

(d) State the law that this equation satisfies.

Q.

Write the balanced chemical equations of the following reactions.

(a) Sodium hydroxide + sulphuric acid $\to$ sodium sulphate + water

(b) Potassium bicarbonate + sulphuric acid $\to$ potassium sulphate + carbon dioxide + water

(c) Iron + sulphuric acid $\to$ ferrous sulphate + hydrogen.

(d) Chlorine + sulphur dioxide + water $\to$ sulphuric acid + hydrogen chloride

(e) Silver nitrate $\to$ silver + nitrogen dioxide + oxygen

(f) Copper + nitric acid $\to$ copper nitrate + nitric oxide + water

(g) Ammonia + oxygen $\to$ nitric oxide + water

(h) Barium chloride + sulphuric acid $\to$ barium sulphate + hydrochloric acid

(i) Zinc sulphide + oxygen $\to$ zinc oxide + sulphur dioxide

(j) Aluminium carbide + water $\to$ aluminium hydroxide + methane

(k) Iron pyrites ($Fe{S}_2$) + oxygen $\to$ ferric oxide + sulphur dioxide

(l) Potassium permanganate + hydrochloric acid $\to$ potassium chloride + manganese chloride + chlorine + water

(m) Aluminium sulphate + sodium hydroxide $\to$ sodium sulphate + sodium meta aluminate + water.

(n) Aluminium + sodium hydroxide + water $\to$ sodium meta aluminate + hydrogen

(o) Potassium dichromate + sulphuric acid $\to$ potassium chloride + chromium chloride + water + chlorine.

(p) Sulphur + nitric acid $\to$ sulphuric acid + nitrogen dioxide + water.

(q) Sodium chloride + manganese dioxide + sulphuric acid $\to$ sodium hydrogen sulphate + manganese sulphate + water + chlorine.

Q.

Give a balanced equation for conversion of - a] an ammonium salt to a basic b] a soluble lead salt to an insoluble lead salt – formed as a white precipitate.

Q.

Why should an equation be balanced? Explain with the help of a simple equation.

Q.

A sample of 12g of coke was heated till it underwent complete combustion. Carbon dioxide gas thus formed was collected and was found to weigh 44 g. Calculate the mass of oxygen consumed during this reaction.

Q. The addition of sulphuric acid to ethanol results ethene and water. This shows that sulphuric acid is a _______.

1. Catalyst
2. Oxidizing agent
3. Dehydrating agent
4. Reducing agent

Q. why should an equation be balanced?

Q. Why are alloys considered as mixtures not compounds?

Q. Sodium reacts with silver nitrate to produce silver chloride and sodium nitrate.
d) State the law that this equation satisfies?

Q. Write chemical equations for the following equation and balance them.
Calcium + Nitrogen $\to$ Calcium nitride

Q. All of the following will show Tyndall effect, except

1. Soap solution
2. Sugar solution
3. Cod liver oil
4. Ink

Q. Bosch process is used for large-scale production of hydrogen. Write balanced reaction.

Q.

A sample of 12g of coke was heated till it underwent complete combustion. Carbon dioxide gas thus formed was collected and was found to weigh 44 g. Calculate the mass of oxygen consumed during this reaction.

Q. Tyndall effect is observed in

Q.

Complete the balanced equation

$Cu+2H_{2}S{O}_4\to$ ________ $+S{O}_2+2H_{2}O$

1. CuSO₄

2. CuSO₂

3. SO₃

4. SOH₃

Q.

For the given reaction to be balanced, the number of atoms of an element on both side of the reaction should be equal.

1. True

2. False

Q.

(a) What is a balanced chemical equation ? Why should chemical equations be balanced ?

(b) Aluminium burns is chlorine to form aluminium chloride $\left(AlC{l}_3\right)$. Write a balanced chemical equation for this reation.

(c) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. Write a balanced chemical equation for this reaction.

Q. Write the chemical equations for the following activities. (EX.Q.8.a)
NaOH solution was added to HCl solution.

Q. 0.5 g of a substance is dissolved in 25 g of a solvent. Calculate the concentration of solution in terms of mass by mass percentage.

1. 1.96%
2. 4.85%
3. 3.1%
4. 2.8%

Q. Write the chemical equations for the following activities. (EX.Q.8.a)
NaOH solution was added to HCl solution.

Q. The Tyndall effect, also known as Tyndall scattering, is the phenomena of scattering of light by particles in a .

1. pure substance
2. colloid
3. solution

Q. Which is not an indicator of chemical reaction?

1. Change in mass
2. Change in colour
3. Change in state
4. Change in temperature

Q. Which is not an indicator of chemical reaction?

1. Change in state
2. Change in colour
3. Change in mass
4. Change in temperature