XI Chemistry

SECTION “A” – (Multiple Choice Question)

Q.1. Prepare Multiple Choice Questions from your Text Book.

SECTION “B” – (Short Questions Answers)

NOTE: Answer any FOURTEEN questions from this Section. All questions carry equal marks.

Q.2. Describe the following.

i. Dobereiner’s Law of Triads
ii. Newland’s Law of Octaves
iii. Decomposition Reactions
iv. Addition Reaction
v. Single Displacement Reaction
vi. Double Displacement Reactions
vii. Combustion Reaction

OR

What are the Lanthanides and Actinides? To which of the s, p, d, or of block of the elements do they belong?

OR

What are the functions of the “Salt Bridge” or porous partition in an Electrochemical Cell?

Q.3. Define the following terms.

i. Vander Waal’s Forces
ii. Dipole-Dipole Forces
iii. Evaporation
iv. Radioactivity
v. Heart of Neutralization
vi. Faraday
vii. Coulomb
viii. Ampere
ix. Solid
x. Matter
xi. Melting Point
xii. Solution

Q.4. Define the following terms.

i. Atomic Number
ii. Isotopes
iii. Periodicity
iv. Modern Periodic Law
v. Periods
vi. Groups
vii. Ionic Bond
viii. Single Covalent Bond
ix. Polar Bond
x. Double Covalent Bond
xi. Triple Covalent Bond
xii. Non-Polar Bond

Q.5. Write two contribution of Jabir-Bin-Hayan, Al-Razi, Al-Beruni, Ibne-Sina in the field of chemistry.

OR

Write down five postulates of Dalton’s Atomic Theory. Write five characteristics of Cathode Rays.

OR

Write three properties of the Positive Rays that are produced in the Gas Discharge Tube when a high voltage current is passed through it under reduced pressure.

Q.6. Define the following terms.

i. Atomic Mass
ii. Mole
iii. Diffusion
iv. Brownian Movement
v. Boiling Point
vi. Sublimation
vii. Unsaturated Solution
viii. Super Saturated Solution
ix. Molecular Formula
x. Electron Affinity
xi. Electro Negativity
xii. Ionization Potential

Q.7. Balance the following Chemical Equations.

CH₄ + O₂ → CO₂ + H₂O
KNO₃ → KNO₂ + O₂
Zn + HNO₃ → Zn(NO₃)₂ + H₂O + NH₄NO₃
PbO + O₂ → Pb₃O₄
H₂S + O₂ → H₂O + SO₂
CaCO₃ + Al₂SiO₇ → CaSiO₃ + Ca₂Al₂O₅ + CO₂
Ba(NO₃)₂ → BaO + NO₂ + O₂
Ca + H₂O → C₂H₅OH + CO₂

Q.8. Define the following terms.

i. Molarity
ii. Molality
iii. Mole-Fractions
iv. Electrolytes
v. Non-Electrolytes
vi. Titration
vii. Neutralization
viii. Atomic Radius
ix. Exothermic
x. Endothermic
xi. Fusion
xii. Enthalpy

Q.9. State Mendeleev’s Periodic Law and write its four salient features.

OR

What are Halogens? Why are they placed in VII-A group of the Periodic Table?

OR

Write four characteristics of Covalent Ionic Compounds.

Q.10. Write three differences between a solution and a suspension.

OR

Write three differences between metals and non-metals.

OR

Define the term “Endothermic Reactions” and give one example of an Endothermic Reaction.

Q.11. What is a double salt? Write the chemical formula of the following salts.

i. Chrome Alum
ii. Canalite
iii. Mohr salt

OR

Define Molar Mass. Calculate the molar masses of the following compounds.

Al₂(SO₄)₃
K₄Fe(CN)₆

OR

Define an Exothermic Reaction and give two examples of exothermic reactions.

OR

Define salt. Describe three types of salts with examples.

Q.12. Write down two physical and two chemical properties of Acids.

OR

Define pH and explain why a Neutral solution is said to have pH of 7.

OR

Define Mole and Avogadro’s Number and calculate the number of moles in 90g of water.

Q.13. Explain the process of the electrolysis of pure alumina with balanced equations (no diagram is required).

OR

What are Plastics? What is the difference between Thermoplastics and Thermosetting Plastics? Write the structure of bakelite with its two uses.

Q.14. Describe with the help of a labelled diagram how sulphur is extracted by Frasch Process.

OR

Describe the industrial preparation of Hydrochloric Acid.

OR

Describe the Laboratory preparation of methane. (CH₄).

Q.15. Write down the Industrial, Laboratory preparation of Bleaching Powder.

OR

Write down difference between Iron and Steel.

OR

Define Alloys and write down some common Alloys.

OR

Define the following terms.

i. Hydrocarbons
ii. Halogenations

Q.16. A Hydrocarbon contains six carbons atoms. Write its molecular formula, if it is

An Alkane
An Alkene
An Alkyne

OR

Calculate the number of the reactions of Hydrogen with

i. CuO
ii. CO
iii. Na

OR

What is heavy water? Write is two properties.

OR

Write down three uses of Hydrogen.

OR

Write down two physical and two chemical properties of carbon.

Q.17. Describe the preparation of Sodium Silicate (Na₂SiO₃) and what is silica gel. Write two uses.

OR

Write down the industrial preparation of Hydrogen per oxide (H₂O₂).

OR

What is meant by Hardwater? Write down the causes of Hardwater.

Q.18. Write down the preparation of Hydrocarbon in Laboratory.

OR

Write down two uses of the following.

i. Sulphuric Acid
ii. Nitric Acid
iii. Sulphur
iv. Hydrochloric Acid

OR

Describe the laboratory preparation of chlorine gas with labeled diagram and balanced chemical equation.

Q.19. Define the following terms.

i. Homologous Hydrocarbons
ii. Functional Group
iii. Aliphatic Hydrocarbon
iv. Alicyclic Hydrocarbon
v. Aromatic Hydrocarbon

Q.20. Describe the preparation of Ethene.

OR

Write down industrial preparation of Sodium Hydro Oxide.

OR

Write down industrial preparation of Sodium Carbonate.

Q.21. Write short note on Paints.

OR

Write short note Polishes.

OR

Describe Chrocks Method and Ion Exchange Method for the removal of hardness of water.

Q.22. Describe the preparation of Nitrogen with Air.

OR

Describe the preparation of Nitric Acid with Ostwald process and the preparation of Sulphuric Acid with Contact Process.

OR

What is “Aqua Regia”? How does it dissolve gold?

SECTION “C” – (Descriptive Answer Questions)

Q.23. (a) Define the term specification. Write the names of three kinds of soap with their composition.
Q.23. (b) Write down the industrial preparation of Sodium Bi-Carbonate.
Q.23. (c) Describe the preparation of Amonia by Haber Bosch Process.
Q.23. (d) Describe the extraction of iron.

Q.24. (a) Describe the Industrial Preparation of Chlorine.
Q.24. (b) How many Allotropic forms of sulphur are describe any two of them.
Q.24. (c) Write two causes of food spoilage and two methods of its prevention.
Q.24. (d) What are Inks? Write the names of three kinds of Inks with their composition.

Q.25. (a) Write five differences between Covalent Bond and Co-Ordinate Covalent Bond.
Q.25. (b) Write down Advantages and disadvantages of Mandeleev’s Periodic Table.
Q.25. (c) State the following Laws.

i. Law of Conservation of Matter
ii. Law of Constant Composition
iii. Law of Multiple
iv. law of Reciprocal

Q.25. (d) What is Chemistry? Write the names of its any six branches and define them.

Q.26. (a) What is Electroplating? With the help of a labelled diagram. Explain how you would electroplate an iron spoon with nickel?
Q.26. (b) Define Electrolysis and state Faraday’s First and Second Law of Electrolysis.
Q.26. (c) A current of 5 amperes was passed through a solution of CuSO₄ for an hour. Find the mass of copper metal deposited on the cathode. (The electrochemical equivalent of copper is 0.000329g/c).
Q.26. (d) Define Solubility. Write the names of the factors that affect solubility and describe the effect of temperature.

Q.27. (a) What is Allotropy? Write the names of any two crystalline forms of carbon and differentiate between Diamond and Graphite.
Q.27. (b) Write down Industrial preparation of Hydrogen.
Q.27. (c) State Arrhenius, Lewis, Bronsted Lowry Theory of acids and bases.
Q.27. (d) With the help of a neat and labelled diagram explain the construction and working of a Dry Cell.