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CLASS 10CHEMISTRY( )PART - 2

Strictly as per the Latest Syllabus and DesignPrescribed by SCERT Kerala Education Board

KERALA SSLC

FOR2017

EXAM

Based on Latest SCERT Textbook issued by Department of Education, Government of Kerala in 2016

Includes Onam Question Paper issued by SSLC Board along with Scheme of Evaluation

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( 3 )

*First Terminal Evaluation - 2016 with Scheme of Evaluation

(Issued by SSLC Board in November 2016) 5 - 8th *NOTE: This is the November Examination Paper issued by SSLC Board for Class 10 . It contains questions from both

Part- I & Part-II of the SCERT Textbook. This Oswaal Question Bank is exclusively based on SCERT Textbook Part II. In

order to purchase Oswaal Part-I Question Bank contact your closest bookseller (refer to the distributor list)

or log on to www.oswaalbooks.com; flipkart.com; amazon.in.

5. PRODUCTION OF METALS 9 - 21

Topic-1 : Minerals, Concentration of Ores, Extraction of Metals from Concentrated Ore,

Refining of Metals

Topic-2 : Chemistry of Metallurgy, Industrial production of Iron, Extraction of Aluminium,

Refining of Copper

6. 22 - 41NOMENCLATURE OF ORGANIC COMPOUNDS

Topic-1 : Hydrocarbons, Nomenclature of Branched hydrocarbons, Nomenclature of

Unsaturated hydrocarbons

Topic-2 : Functional groups—Hydroxyl group, Aldehyde group, Keto group,

Carboxylic group, Halo group, Alkoxy group, Amino group

Topic-3 : Isomerism, Isomerism in Alicyclic Compounds

7. 42 - 55CHEMICAL REACTIONS OF ORGANIC COMPOUNDS

Topic-1 : Hydrocarbons undergoing chemical changes : Substitution reaction,

Addition reactions, Polymerisation, Combustion, Thermal CrackingTopic-2 : Alcohols, Carboxylic acids, Esters, and Aromatic compounds

8. CHEMISTRY FOR HUMAN PROGRESS 56 - 71

Topic-1 : Fossil Fuels – Petroleum and CoalTopic-2 : Medicines

Topic-3 : Cement

Topic-4 : The World of Colours–Dyes and Pigments

Topic-5 : Glass

Topic-6 : Green Chemistry

qq

CONTENTS

( 4 )

Malcolm Forbes said “Education's purpose is to replace an empty mind with an open one”

and this is something which is always followed by Government of Kerala, Department of Education,

whether through their education system framework or recent enhancement in their curriculum. The

aim of their Curriculum is not just to let learners obtain basic knowledge but to make them life-

long learners.

The purpose of this book is to nurture individuality and thus enhance one's innate potentials

which help in increasing the self-study mode for students. This book strengthens knowledge and

attitude related to subject. This book is designed in such a way that students can set their own goals

and can improve their problem solving and thinking skills.

This book is strictly as per the latest SCERT Kerala Textbook, introduced by SSLC Board in

2016. It follows the latest syllabus prescribed by the board. It contains all types of questions like

Textbook Questions, VSA Questions (Very Short Answer), SA Questions (Short Answer), MCQs

(Multiple Choice Questions) and LA Questions (Long Answer). A synopsis is given for every chapter

which contains important points from that chapter. Each chapter has high quality figures wherever

required for better, fast and clear understanding.

OSWAAL SSLC Question Bank is different and better in terms of High Quality Questions

which are developed by 'OSWAAL Expert Panel' which ensures success in examination. The Question

Bank is arranged ‘Topic-Wise’ where each topic from every chapter is explained in detail. High quality

figures and Flow charts are given to improve retention of concepts.

Through OSWAAL Books students are taught how to think, not what to think. We at

OSWAAL Books try to use quality content, standard language, creativity and high quality figures,

which makes readers to enjoy it because we believe if our readers don't enjoy reading our book then

there is no use in reading it at all. This is one of the reasons that the scope of this book extends from

students to teachers. Teachers can use this book as a perfect teaching guide and students can use

this book for good learning and practice.

At last we would like to thank our authors, editors, reviewers and specially students whom

we request to send suggestions regularly which will help in continuous improvement of this book

and will make this book “One of the Best”. Wish you all Happy Learning.

Why Topic Wise Question Banks Are A Better Choice than Previous Year’s Papers ?

Question Banks Previous Years’ Papers

1. Chapter-wise and Topic –wise presentation

in Question Banks facilitates systematic

study.

2. Question Banks can be referred to by the

students throughout the year as well as at

the completion of each chapter in school.

3. Question Banks, take into account any

changes in syllabus or layout and hence are

fully updated and aligned as per the latest

specifications by the Board.

1. Year Wise presenta t ion res t r i c t s

methodical flow of learning.

2. These can be referred to only after the

completion of the full syllabus in school.

3. Previous Years' questions cannot be

changed and hence fail to be adept with

the latest Board specifications

–Publisher

PREFACE

FIRST TERMINAL EVALUATION 2016

CHEMISTRYStandard : X (Issued by SSLC Board in November 2016) Score : 40

Time : 1½ hour

General Instructions : (i) First 15 minutes is given as cool off time. This time is to be used for reading and understanding the questions. (ii) Write down answers for all questions. (iii) The score for each question is given along with the question.

1. When the element Fe with atomic number 26 undergo chemical reactions, ions with different oxidation states are formed.

(a) Write the sub-shell electronic configuration of Fe3+. 1

(b) Write the formula of the compound formed between Fe3+ and chlorine. 1

(c) Why does Fe show different oxidation states ? 2

2. Assume that 10 mol hydrogen and 10 mol oxygen react to produce water. Which reactant remains after the completion of the reaction ? What is the quantity of the remaining reactant ? 2

3. To prepare hydrogen gas at a faster rate, magnesium powder was added to dilute hydrochloric acid instead of magnesium ribbon.

(a) Why does the rate of reaction increase, when magnesium powder is used instead of magnesium ribbon ? 2

(b) Write any instance from daily life in which the rate of chemical reaction can be increased in this manner. 1

4. Select the correct statement.

(a) All shells have 'd' sub-shells.

(b) 'p' sub-shell can accommodate a maximum of 6 electrons.

(c) The energy of shells decreases as the distance from the nucleus increases.

(d) Some of the f-block elements show radioactivity. 2

5. Complete the table (Atomic mass : Na–23, O–16) 2

Substance Number of molecules Number of atoms Mass

Sodium 6.022 × 1023 (a) 23 g

Oxygen (b) 2 × 6.022 × 1023 (c)

Ozone 6.022 × 1023 (d) 48 g

6. Dilute sodium thiosulphate solution is taken in two test-tubes. One test-tube is heated. A few drops of dilute HCl are added in both the test-tubes. A precipitate of sulphur is formed faster in the heated test-tube.

(a) What will be the observation in the test-tube that was not heated ? 1

(b) How does the temperature influence the rate of reaction ? Explain. 2

7. The sub-shell electronic configuration of a few elements are given. (These are not actual symbols).

A - 1s22s22p5

B - 1s22s22p63s2

C - 1s22s22p63s23p63d34s2

D - 1s22s22p63s23p64s2

(a) Which of the elements belong to the same group ? 1

(b) Which of the elements belong to the same period ? 1

(c) Which of them are not representative elements ? 1

(d) Which is the non-metal ? 1

6 ] Oswaal Kerala SSLC Question Bank, CHEMISTRY PART–2, CLASS-X

8.

A

B

1 atm

2 atm

A

B

When a closed system containing gases A and B react together, how does the collision rate change on increasing the pressure ? How does this influence the rate of reaction ? Analyse the picture and find the answer. 3

9. (A) SO2, NaOH

If 100 g each of the above substances are taken, which one will have greater number of atoms ?

(Atomic mass : S = 32, O = 16, Na = 23, H = 1) 4

OR

(B) Consider 112 litre of SO2 gas at STP.

(Atomic mass : S = 32, O = 16, N = 14, H = 1)

(a) Calculate the GMM of SO2. 2

(b) Calculate the GMM for the same volume of NH3 at STP. 2

10. The atomic number of copper is 29. Its electronic configuration is given below. Identify the correct one. Give reason.

(a) 1s22s22p63s23p63d94s2

(b) 1s22s22p63s23p63d104s1 2

11. N2(g) + 3N2(g) 2NH3(g) This is a reversible reaction. 2

(a) Find out and write down the forward reaction and the backward reaction. 2

(b) When does this chemical reaction attain equilibrium ? 1

12. H2 + Cl2 → 2HCl

Examine the above equation. Assume that in this reaction, 6.022 × 1023 Hydrogen molecules are taken.

(a) How many molecules of chlorine will take part in the chemical reaction ? 1

(b) How many moles of hydrogen chloride will be formed ? 1

13. An incomplete form of the periodic table is given. (These are not actual symbols.)

P

1

2

Q 3 4 5 6 7 8 9 10 11

R

S

13 14 15 16

17

T

12

18

(a) Which is the largest atom ? 1

(b) Which has the highest ionization energy ? 1

(c) Which is the element whose electronic configuration ends as 2s22p2 ? 1

14. One litre of one molar sodium chloride (NaCl) solution is prepared in water, (Atomic mass : Na = 23, Cl = 35.5)

(a) How many grams of sodium chloride will be required ? How is this solution prepared ? 2

(b) How can you change the concentration of this solution to 0.5M ? 1

SOLVED PAPER - 2016 [ 7

SOLUTIONS(Scheme of Valuation, 2016)

Q. No. Answer Marks

1. (a) 1s2 2s22p63s23p63d54s0

(b) FeCl3 (c) Since Fe is a d block element, the last electron goes to the d sub-shell of the penultimate

shell. There is only a small difference between the energies of 4s and 3d sub-shells. Hence the penultimate d electron can also take part in chemical reactions in addition to the outermost electrons.

1

1

2

2. Oxygen

5 moles.

1

1

3. (a) On powdering the surface area increases. The number of effective collision will also increase. According to collision theory, chemical reaction are the results of effective collisions between the molecules of the reactants having threshold energy.

(b) Small pieces of paper burns rapidly (or any one)

2

1

4. b, d

(b) p sub-shell can accommodate a maximum of 6 electrons.

(d) some of the f block elements show radio-activity. 1 + 1

5. Substance Number of molecules Number of atoms Mass

Sodium 6.022 × 1023 (a) 6.022 × 1023 23 g

Oxygen (b) 6.022 × 1023 2 × 6.022 × 1023 (c) 32 g

Ozone 6.022 × 1023 (d) 3 ×6.022 × 1023 48 g 2

6. (a) The reaction occurs at a slower rate. (The precipitate is forming slowly.) (b) When temperature increases, the kinetic energy of the molecules increases. More molecules

get enough theresold energy, Hence the rate of the reaction increases.

1 2

7. (a) B, D (b) C, D (c) C(d) A

111

18. When pressure increases, the gas molecules come closer. Since they are continuously travelling in

all directions, the number of collisions increases. According to collision theory, the rate of a chemical reaction increases with the increase in the number of effective collisions between the molecules of the reactants.

1½

1½

9. (A) 100 g of NaOH

Number of moles = Mass in grams/Gram molecular mass

= 100 g/40 g

Number of molecules = number of moles × 6.022 × 1023

= (100/40) × 6.022 × 1023

Number of atoms = 3 × (100/40) × 6.022 × 1023

(B) 100 g of SO2

Number of moles = Mass in grams/Gram molecular mass

= 100 g/64 g

Number of molecules = number of moles × 6.022 × 1023

= (100/64) × 6.022 × 1023

Number of atoms = 3 × (100/64) × 6.022 × 1023

Hence 100 grams of NaOH contains greater number of atoms (lesser number of moles) 4

8 ] Oswaal Kerala SSLC Question Bank, CHEMISTRY PART–2, CLASS-X

Or Number of moles at STP = Volume of the gas in litres/22.4 litres = 112 L/22.4 L = 5 moles = 5 GMM(a) GMM of SO2 5 moles = 5 GMM = 5 × 64g = 320 grams(b) GMM of NH3 5 moles = 5 GMM = 5 × 17g = 85 grams

2

2

10. (a) 1s22s22p63s23p63d104s1

(b) Reason : Completely filled configurations have extra stability.11

11. (a) Forward reaction N2 + 3H2 → 2 NH3 Backward reaction 2NH3 → N2 + 3H2 or N2 + 3H2 ← 2 NH3 (b) When the rates of forward and backward reactions become equal, the reaction attains

equilibrium.

111

12. (a) 1 moles. (b) 2 moles.

11

13. (a) Q (b) T (c) S

111

14. (a) 58.5 grams Take 58.5 grams of NaCl in a beaker. Add a little water to dissolve it. Add enough water till the

total volume of the solution bcomes 1 litre. (b) Add 1 litre of water to then 1 molar solution as prepared above. Now the concentration will

be 0.5 M.

1 1 1

CHAPTER

5 PRODUCTION OF METALS

SYLLABUS ¾ Concentration of ores : Hydraulic washing, Froth Floatation, Magnetic separation, Leaching ¾ Extraction of metals from concentrated ore ¾ Refining of metals : Liquation, Distillation, Electrolytic Refining, ¾ Chemistry of Metallurgy ¾ Industrial production of Iron ¾ Extraction of Aluminium ¾ Refining of copper

TOPIC-1Minerals, Concentration of Ores, Extraction of Metals from Concentrated Ore, Refining of Metals

QUICK REVIEW ¾ Physical properties of metals are malleability, ductility, thermal and

electrical conductivity. ¾ A naturally occurring compound in which the metal exists either in

native state or combined state is called mineral. ¾ Characteristics of minerals, which are used for extraction of metals,

are : Abundance, Easily separable, high metal quantity. ¾ Ores are the mineral from which a metal is economically, easily and

quickly extracted. For example, Haematite is an ore of iron; Bauxite is an ore of Aluminium.

¾ Metallurgy involves all the processes leading to the separation of a pure metal from its ore.

¾ Important stages of metallurgy are : Concentration of ores, Extraction of metal from concentrated ore, and Refining of metals.

¾ Concentration of ore is the process of removing impurities (gangue) from the ore obtained from the earth’s crust. ¾ There are different methods to concentrate the powdered ore, like Hydraulic washing, Froth floatation, Magnetic

separation and Leaching. ¾ Levigation or Hydraulic Washing : Impurities lighter than ore particles are removed by washing in a current of

water. eg., concentration of oxide ores. ¾ Forth Floatation : Mixture of the powdered ore, water and pine oil is strongly agitated by compressed air, heavier

impurities sink to bottom. While the ore is separated from bottom. e.g. concentration of copper pyrites. ¾ Magnetic separation : Powdered ore is fed to the conveyer belt moving over a magnetic wheel to separate

magnetic substance. ¾ There are two stages for extraction of metals from concentrated ore : l Conversion of concentrated ore into its oxide : It involves Calcination and Roasting process. l Reduction of the oxide : It is the process of extraction of metal from the oxide. Carbon monoxide and carbon

are two reducing agents. ¾ Electricity is used as reducing agent to extract highly reactive metals like sodium, potassium and calcium from

their ores. ¾ Refining of metals is the process of removal of impurities to get the pure metal. ¾ Methods of refining of metals are : Liquation, Distillation, and Electrolytic refining. ¾ Electrolytic refining is the process of refining a metal by the electrolysis of a solution of the salt of the metal using

a small pure metal as the negative electrode and impure metal as the positive electrode.

TOPIC - 1Minerals, Concentration of Ores, Extraction of Metals from Concentrated Ore, Refining of Metals .... P. 09

TOPIC - 2Chemistry of Metallurgy, Industrial production of Iron, Extraction of Aluminium, Refining of Copper .... P. 14

Oswaal Kerala SSLC Question Bank ForClass 10 Chemistry (Part-2) With

Complete Solutions For 2017Examination

Publisher : Oswaal Books ISBN : 9789386177940 Author : Panel Of Experts

Type the URL : http://www.kopykitab.com/product/9670

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