TyroCity: Chemistry 11 Notes

Sulphur- Old is Gold

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

How is the moisture present in SO2 gas removed?
Acid rain forms when oxides of sulphur and nitrogen react with water. What are these oxides chemically?
Identify a viscous liquid that react with table sugar (C12H22O11) giving a charred (black) mass. Give the reaction involved.
Give two examples of reactions in which H2SO4 behaves as: (a) Strong acid (b) a dehydrating agent (c) an oxidizing agent
Explain with reason, why: (a) Conc. H2SO4 should always be added to H2O but never H2O to the acid? (b) Sugar is charred in contact with conc. H2SO4?
Write any two differences between the bleaching action of Cl2 and SO2.
What happens when H2S is passed through acidified potassium permanganate solution?
What happens when gas obtained by heating oxalic acid in presence of conc. H2SO4 is passed through heated caustic soda?
Write balanced chemical reactions for the laboratory preparation of: (a) Hydrogen Sulphide (b) Sulphurdioxide
What happens when a moist red flower is introduced into a gas jar containing SO2 gas?
Give a reaction of each to show: (a) SO2 as an oxidizing agent (b) H2S as an analytical agent

Define coefficient of viscosity.

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

Ans: Coefficient of viscosity is defined as the tangential force per unit area required to maintain unit velocity gradient between the layers of liquid.

Structure Isomerism in Organic Compounds

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

1. Write the isomers of C2H6O and give their IUPAC names.

Write the isomers of C2H4O2 and give their IUPAC names.
Write the possible isomers of C6H14 and give their IUPAC names.
Write short notes on structure isomerism in Organic Compound.
Write the isomers of C4H10 and give their IUPAC names.

Ozone

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

Write resonance structures of ozone.
How does CFC deplet Ozone layer?

Verification of (Boyle's + Charles) Law

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

VERIFY BOYLE’S LAW WITH THE HELP OF K.M.T

According to Boyle’s law at constant temperature, pressure & volume of a gas are related as:

PV = constant

According to Kinetic theory, pressure of a gas is

VERIFY CHARLES LAW WITH THE HELP OF K.M.T
According to Charles law at constant pressure, absolute temperature & volume of a gas are related as:
V/T = constant
According to Kinetic theory, pressure of a gas is

Mention physical properties of liquid due surface tension.

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

Spherical shape of liquid drop.

Rise and fall of liquid in a capillary tube.

Why is a mercury droplet spherical?

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

Ans: Due to surface tension. Surface tension is the property of liquid due to which it tries to acquire minimum surface area. Since, for a given volume sphere has a minimum surface area, a mercury droplet is spherical.

NEB Model Question for Chemistry – Class 11

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

NEB QUESTION MODEL OF CHEMISTRY
GRADE : 11
FOR : 2070

Exam Oriented Model Question
Time : 3 hrs

Full Marks : 75

Pass Marks : 27
Group ‘A’

Attempt any Fifteen question : 15 × 2 = 30

Q.1. State Law of reciprocal proportion.

Q.2. The oxide of an element contains 67.67 % of oxygen and V.D. of its volatile chloride is 79

Q.3. Define surface tension of Liquid.

Q.4. Write down important differences between crystalline and amorphous solid.

Q.5. What is Pauli’s exclusion principle ?

Q.6. Give the values of all four quantum numbers of 11th electron of magnesium.(At. No. 12)

Q.7. What is radioactivity ?

Q.8. Write the Lewis structure of (a) H2O2 and (b) HNO3.

Q.9. Explain why HCL has polar character though it has covalent bond.

Q.10. State Modern Periodic law.

Q.11. How would you show the following reaction is a redox reaction?
Mg + Cl2 —————> MgCl2

Q.12. State Le-Chateliers principles.

Q.13. What are the difference between nascent and molecular hydrogen ?

Q.14. name any two oxides of each of the following :
(i) amphoteric
(ii) neutral.

Q.15 What is allotropy ? Name the latest discover allotropic form of carbon.

Q.16. What is meant by acid rain ? Give one major effect of acid rain.

Q.17. Distinguish between flux and slag with one example of each.

Q.18. Can sodium be extracted by the electrolysis of aqueous solutions of sodium chloride ? If not why ?

Q.19. Define electrophile and nucleophile with an example of each.

Q.20. Give IUPAC name of the following compound.
a) CH3-CH(Br)-CH(NH2)-COOH
b) CH3-C(CH3)2-C9OH)H-CH3

Q.21. What is meant by thermal cracking and catalytic cracking ?

Q.22. Identify A and B in the following reaction and give their IUPAC name.

Group ‘B’

Attempt any five Question. 5 * 5 = 25

Q.23. Urea [(NH2)2CO] is prepared by reacting ammonia with carbon dioxide :
2NH3(g) + CO2(g) —–> (NH2)2CO(aq.) + H2O(l)
In one process, 637.2 g NH3 is treated with 1142g of CO2.
(a) Which of the following reactant is the limiting reactant ?
(b) Calculate the mass of urea formed
(c) How much excess reagent (in gram) is left at the end of the reaction ?
Q.24 State Avogadro’s law. Using the law to deduce relationship between Molecular mass and vapour density.
Q.25. State and explain Hund’s rule of maximum multiplicity.
Q.26. Specify Oxidation half, reduction half, oxidizing agent and reducing agent. Balance the following equation by ion-electron or oxidation number method :
Fe2+ + H+ + NO3– ——–> Fe⁺³ + NO + H2O
Q.27. Describe the manufacture of nitric acid by Ostwald’s process.
Q.28. Explain the laboratory preparation of carbon monoxide in laboratory What happens when CO is passed through finely divided nickel ?
Q.29. Describe the detection of foreign element (N,S,X) in organic compounds.

Group ‘C’

Attempt any two questions. : 2 × 10 = 20

Q.30. State Boyle’s law and Charles law. Derive PV=nRT. What is the density (in gram per liter) of ammonia at STP if the gas in a 1.0L bulb weights 0.672g at 25oC and 733.4 mm Hg pressure.

Q.31 Describe the manufacture of sodium carbonate by ammonia soda process. Also, mention the function of limestone in the manufacture process.

Q.32. Write down the process involved in the manufacture of caustic soda by Solvay-Kellner’s process.

Oxygen

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

Write the names of any two neutral oxides with their formulae.
What are neutral and amhoteric oxides? Give one example of each.
What are oxides? Classify the following oxides justifying the classification: a) NO b) CO2 c) ZnO d) CaO
Mention one example of each of the following: i. Allotrope of oxygen ii. Amphoteric oxide iii. Most abundant isotope of hydrogen iv. Neutral oxide

Environmental Pollution- Old is Gold

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

What is meant by acid rain? Give one major effect of acid rain.

Nitrogen and Its Compounds

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

Write the names of any two metals which can liberate Hydrogen gas from Nitric Acid.
What happens when:
a) Gas obtained by heating slaked lime and ammonium chloride is passed through copper sulphate
solution.

b) Dilute nitric acid reacts with magnesium.

c) A mixture of ammonia and oxygen is passed over platinum gauze heated to 800°C.

d) A solution of sodium nitrite and ammonium chloride is heated to boiling.

e) Zinc is added in a hot alkaline solution of potassium nitrate.

f) Mercurous nitrate paper is exposed in ammonia gas.

How does an ammonia molecule differ from ammonium ion?
Write the action of aquaregia on gold.
Name any one pollutant of photochemical smog and state one of its effects.
Explain why ammonia gas cannot be dried by passing through conc. H2SO4 acid.
In ring test of nitrate, what chemical compound is formed.
What happens when the precipitate obtained by the addition of AgNO3 solution on sodium chloride is treated with ammonia solution?

Give reason.

Chemistry 11 Notes — Sat, 12 Jul 2014 05:41:42 +0000

a) Falling liquid drops are spherical.
Due to surface tension. Surface tension is the property of liquid due to which it tries to aquire minimum surface area. Since, for a given volume sphere has a minimum surface area, a mercury droplet is spherical.

b) Evaporation takes place from the surface of liquid.
Since, the kinetic energy of the surface molecule is greater than the bulk molecule, evaporation takes place from the surface of liquid.

c) It is more efficient to wash clothes in hot water than cold water.
Surface tension decreases on increase in temperature. Due to this hot water can wet the clothes more effectively then cold water. So, it is more e to wash clothes in hot water than cold water