Science

CCE Work Sheet 3 W.S-I.3 II Term Lession : 2. Nalame Nalama

I standard

1. What are the activities that we are not following in our daily routine activities? A)

Brushing the teeth

B)

Eating the food

C)

Playing

D)

Taking Medicines

2. What we do to keep our body clean? A)

Shouldn’t take bath daily

B)

Taking bath regularly

C)

Take bath once in a month

D)

Never take bath

3. How do you brush your teeth? A) Brick powder powder

B) Tooth powder

C) Ash powder

4. What can we do to keep ourself clean? A) Don’t comb the hair B) Cutting the nails C) Don’t wear clean clothes D) Don’t wear chapals

5. What are the foods can be taken to make our body healthy? A) Contaminated food (food affected by flies) B) Nutrition food C) Junk food D) Spoiled food

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D) Carbon

Science CCE Worksheet 3 II Standard - II Term Lesson -3- Hygiene 1. Which of the following activity is correct? a) Throwing garbage on the street b) Throwing garbage in the dustbin c) Throwing garbage in the classroom d) Not removing the garbage surrounding us 2. Which one is not correct in the following match? Instrument

New Instrument

a) Palm leaf fan

- Fan

b) Pot

-Silver vessels

c) Lamp

-Sun

d) Mortar & Pestle

-Grinder

3. Which is incorrect action? a) Eating after bath b) Using open toilet c) Before going to sleep brush your teeth d) Wash your hand before eating. 4. Which one of the following articles is not used to clean your home? a) Broomstick & Dust stick

b) Dustbin, Soap

c) Old cloths, Bucket

d) Oil, Shikakai

5. The Disease caused by mosquitoes from the surrounding stagnated clean water a) Typhoid b) Jaundice c) Dengu d) Cholera

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SCIENCE III Std -2nd term 1)

CCE

Work Sheet-3 Lesson-food and health

Mala showed more physical growth than Kavitha.What type of food would mala have taken?

2)

A)

Rice, wheat, barley

B)

C)

Chocolate, sweet, ice cream

milk, egg, meat D)

murukku, pappad, fries

Choose the ingredients used to prepare fruit juice? A)

Carrot, tomato, beans

B) palak, blacknight shade

C)

Confectionary, sweet, chocolate

D) papaya, banana, milk,

honey 3)

Ramesh is healthy without sickness.What type of food among the following would he have taken in morning?

4)

A)

Vegetables, fruits, sprouted grams

B)

Noodles, ketchup

C)

Chocolate, Sweet, Ice Cream

D)

Fries, Murukku, Pappad

Kala’s vision is not clear after 6 P.M.What type of vitamins should she take to prevent deficiency?

5)

A)

Vitamin - A

B)

Vitamin - B

C)

Vitamin - C

D)

Vitamin - D

Choose the healthiest group of foods. A)

Sprouted Grams, Fruits, Protiens

B)

Pizza, Burger

C)

Chocolate, Ice Cream, Fruit Juice

D)

Poori, Chips, Fried Rice $$]] 3

Science Standard : IV

– CCE Second Term

Work Sheet 3 Topic : 3 - Personal Safety

1.Which of the followings is to be followed while handling electric appliances? a) Touch the electric appliances with wet hands b) Touch the electric appliances with insulated hands c) Using cell phone while it is being charged d) Handle with care 2. One of the road rules for persons who walk and cross the road (Pedestrians) a) Play on the road

b) Run between the vehicles

c) Walk only on the zebra crossing d) Crossing the road while talking in the cell phone 3.The method to be followed while firing the crackers a) Firing the crackers standing nearby b) Firing the crackers and toss them up c) Firing the crackers with big incense stick d) Fire again the burnt crackers 4. Which first aid has to be given to a student, if he faints and falls down in the Morning Assembly in school? a)Laying down is an un –ventilated room b) Sprinkle water on his face and place him in a ventilated place c) Laying down him in a corner place d) Making him stand up immediately and make him stand 5. If a student gets injured while they are playing, the first aid to be given is _______ a) The bleeding has to be stopped with the use of ice bar b) Should not give water for drinking c) In the injured place, tie a bandage with chilly powder d) Tie up the injured place with wet cloth &&** 4

Science Std V

CCE

WORK SHEET 3

II Term - Lesson 3 Hygiene and Prevention of diseases

The breeding place of mosquitoes, which spreads fever like Dengue and Chikungunya is 1) a) Open Water Tank

b) Stagnated water

c) Drainage (or) Sewage water

d) Water in closed vessel

2)

The first thing you should do, as you enter the house, after playing is to a) Drink milk b) Wash the face, hand and legs with soap c) Eat food d) Drink water

3)

In what environment do the mosquitoes breed in your house? a) Keeping the grinder in tilting b) Preventing water stagnation in position tyres c) Keeping the coconut shells upside d) Stagnating water around down house The reason for sprinkling kerosene on the surface of stagnated water is a) to kill fishes b) to kill larva’s of mosquitoes

4)

c) to purify water 5)

d) to remove bad smell

To live a healthy life without disease we need a) Drinking cool drinks packed b) Following self hygiene, eating in healthy bottles food and keeping the surrounding clean c) Eating whatever is available and sleeping for a longtime $$&&

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d) Eating in fast food centres and sleeplessness

Science Standard VI

CCE -

II Term

1. Which one of the following is a mixture a) Milk, Cool drinks, Sugar b) Mixture of metal, Salt, Lemon

Work Sheet 3 Separation of substances

b) Sugar, Salt, Sea water d) Sea water, air, Crude oil.

2. Your mother soaks rice in water before cooking, lighter particles float in the water, Which of the following method that she can use to separate the lighter particles. a) Filtration b) Sedimentation b) By soaking d) Decantation & Sedimentation 3. In houses, the water used for drinking purpose undergoes some cleaning stages. Order the stages in sequence. a) Precipitation, Chlorination, Filtration b) Filtration, Precipitation, Chlorination, c) Precipitation, Filtration, Chlorination, d) Chlorination, Precipitation, Filtration 4. Which environment is suitable for fast Evaporation? a) Wider area, Air, Cloudy b) Sunlight, Smaller area, Air c) Sunlight, Moisture, High temperature d) High temperature, Dry Period, Air 5. What is the reason for the appearance of water droplets in lid of hot soup container? a) Melting b) Evaporation c) Condensation d) Boiling 6. Ravi is bringing water from a pond near his house; he adds alum/potash in the water. What will happen after adding alum (or) Potash. a) Decantation b) Filtration c) Sedimentation d) Decantation &Sedimentation 7. Which one of the following mixture is separated by means of filtration? a) Mixture of Soil and Lime water b) Mixture of water and chilly powder c) Mixture of Salt and Pepper d) Mixture of Glucose and water. 8. The method used to separate the mixture of water, salt, camphor and lime water was given. Write in correct sequences. a) Condensation, distillation, sublimation, Decantation b) Sublimation, Sedimentation, Filtration, Drying c) Filtration, Drying, Sublimation, Condensation. d) Condensation, Filtration, drying, sublimation. 9. Match: a) Freezing b) Melting c) Cooling d) Evaporation a) b) c) d)

A IV IV III I

B I III IV II

I. Solid into liquid II. Liquid into vapour III. Vapour condense into liquid IV. Water into Solid C D III II II I II I IV III

10. Your mother mixed the flour and dry fruits before making cake by mistaken. What will she do to separate the mixture? a) Filtration b) Winnowing c) Sieving d) Sedimentation 6

Science

CCE

STANDARD VIII

TERM – 2

Work Sheet

3

W.S - VIII.3

LESSON 3: ATOMIC STRUCTURE

1. Positively charged, Negatively charged and Neutral Fundamental particles of an atom are, respectively a) Proton, Electron, Neutron b) Electron, Proton, Neutron c) Neutron, Electron, Proton d) Electron, Neutron, Proton 2. Find out the right answer by observing the following equation CaCO3 CaO + CO2 a) Mass of the products will decrease as Carbon-di-oxide releases as gas b) Mass of Calcium carbonate is equal to the sum of the masses of Calcium oxide and Carbon-di-oxide c) Mass of the products will be greater than the mass of the reactants as two products were produced. d) Mass of one product will increase 3. Fe + S FeS (Atomic mass of Fe = 56 g, Atomic mass of S = 32) In the above reaction, how much of Iron does not react?

Fe 59 g

+

S

FeS

32

88

g

g

a) 5 g b) 3 g c) 2 g d) 1 g 4. Water is obtained from the resources like well, rain, sea and river. The weight of Hydrogen and Oxygen in water is in a particular ratio. a) Law of Conservation of Mass b) Law of Definite Proportion c) Law of Reciprocal Proportion d) Gay Lussac’s Law of Combining Volume 5. 25 g of AB dissociates to give 10 g of A and X g of B in a reaction, Find the mass of B using law of conservation of mass. a) 25 g b) 10 g c) 15 g d) can’t find out the mass using this law

7

2H+ + 2e- , H+ represents

6. In this equation H2 a) Hydrogen atom

b) Hydrogen ion c) Hydride

d) Hydrogen molecule

7. When Aluminium changes into Aluminium ion, Number of Electrons and protons are, Al Al3+ + 3 ea) 10 and 13

b) 13 and 10

c) 13 and 13

d) 10 and 10

8. An atom becomes a cation by losing an electron and becomes an anion by gaining an electron. ? + 2eAl3+ + ? ?

1. Mg 2. Al 3. Cl + ea) Mg2+, 2e-, Cl+ c) Mg2-, e-, Cl+

b) Mg2+, 3e-, Cld) Mg, 3e, Cl

9. Hydrogen (H=1) and Oxygen (O=16) combines to give H2O. The ratio of the masses of Hydrogen and Oxygen are 1:8. Then, find the ratio of the mass of Carbon(C=12) and Oxygen(O=16) in CO2. a) 1 : 8 b) 2 : 8 c) 3 : 8 d) 4 : 8 10. When a balloon is brought near to a glass stick which is rubbed with silk cloth, the balloon will be ----------------a) Attracted b) repelled c) repelled after attraction d) attracted after repulsion $$&&

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1.

Science CCE Work Sheet 3 CLASS : IX STD TERM: II LESSON 4 : Chemical Equation ClO3 is ______________ (a).Chlorate ion (b) Chlorite ion (c) Hypochlorite ion (d) Chloride ion

2.

In the following balanced equation a,b,c,d denotes cAl2 (SO4)3 + d H2O a Al(OH)3 + bH2SO4 a) 2,3,1,6 b) 2,3,6,1 c) 1,2,3,6 d) 1,2,6,3

3.

Which of the following equation is an Unbalanced one? a) Ca (OH)2 + H2SO4 CaSO4 +2H2O b) 2Al (OH)3 + 3H2SO4 Al2 (SO4)3 + H2O Al2 (SO4)3 + H2O c) 2Al(OH)3 + H2SO4 d) 4NH3 +5 O2 4NO + 6H2O

4.

In Ammonia formation reaction, while Nitrogen combines with Hydrogen_____________ a) Heat is absorbed from the environment b) Heat is released to the environment c) No change occurs in the environment d) Catalyst is retained back

5.

Which is correct among the following 1. Statement : Negative ion is bigger in size than its parent atom 2. Explanation: The size of negative ion increases because the valence electrons are deflected from the nucleus. a) b) c) d)

Statement is correct, Explanation is wrong Statement is wrong, Explanation is correct Both statement and Explanation are wrong Both statement and Explanation are correct

6.

During the Chemical reaction atoms and molecules are involved. Reason for this reaction is___________ a) Atomic exchange b) Aortic exchange c) Protons exchange d) Electron exchange

7.

After electronic exchange in an atom the cataion possess positive charge and the anion possess Negative charge. Than what charge does the parent atom possess. a) Total Positive charge b) Total Negative Charge c) Neutral d) Either Positive or Negative Change

9

8.

9.

Which of the following reasons regarding the statement is incorrect? Statement: After getting an electron the fluorine atom is changed in to fluid Ion . a) The size of the fluride ion is increased b) Number of protein it less than the number of elections c) The attractive force of the nucleus over the elections in the outer most shall is less. d) The elections in the outer most shall moves towards the nucleus. Choosing the correct answer balance the given chemical equation Na2CO3 + HCl a) 1 + 2 c) 1 + 1

10.

NaCl + H2O + CO2

1+1+1 1+1+1

b) 2 + 1 d) 1 + 2

2+1+1 2+1+1

Many ionic groups can act as a single functional unit. It posses either positive or negative charge. Which following ionic group can function as such? a) Na+

b) Ca2+

(c) OH -

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(d) S2-

Science

CCE work sheet 3

X Standard 1.

w.s.x.3

Lesson – 12. Periodic Classification of Elements

Tin (Sn) is used in the manufacture of food cans. But zinc (Zn) is not used .why? (i) Zinc is costlier than tin. (ii) Melting point of zinc is higher than that of tin. (iii) Reactivity of zinc is higher than that of tin. (iv) Reactivity of zinc is lower than that of tin. 2. Identify the wrong statements according to the Elements, lithium, sodium and potassium. (i) All the three are metals (ii) Displaces hydrogen when reacting with water. (iii) Displaces oxygen when reacting with water. (iv) Form alkalies when reacting with water. 3. Identify the wrong pair based on their uses. (i) Cu, Ag

(ii) Cu, Au

(iii) Au, Ag

(iv) Cu, Cr

4. Match the following and find the right answer. ABCDA)

Metal which is liquid at room temperature Metal which can easily be cut using knife Metal which is a good conductor of heat Metal which is a bad conductor of heat A-4 B-1 C-2 D-3

B) A - 2 B-3 C-4 D-1

C) A - 3 B-4 C-1 D-2

5. Assertion: Gold occur naturally in its solid state Reason: Reactivity of gold is high a) b) c) d)

Assertion true, reason wrong assertion wrong, reason wrong assertion wrong, reason right assertion and reason is right

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1) Sodium 2) Copper 3) Lead 4) Mercury D) A - 3 B-4 C-2 D–1

6. In the modern periodic table, the reason for the decrease in the size of the atom while proceeding from left to right a) No. of outermost electrons increases. b) Attractive forces of Nucleus decreases. c) No. of protons decreases. d) No. of Neutrons increases. 7. The reason for the decrease in the reactivity of iron when reacting with con.HNo3 is a) Formation of Iron Nitride layer. b) Formation of Iron oxide layer. c) Formation of Iron Nitrate layer. d) Formation of Iron Hydride layer. 8. The velocity of element ‘X” is 3. It gives Compounds like X (OH)3, X2O3, XCl3. Which group does X belong to ? a) 12 b) 3 c) 13 d)14 9. Li, Na, K, Rb, Cs, Fr belongs to the First group metals, F, Cl, Br, I, At are belongs to 17th group non-metal, From the elements given below identify the non- metal which is not positioned properly. a) Nitrogen b) oxygen c) Helium d) Hydrogen. 10. The electronic configuration of an element is 2,8,6. From the elements given below which has similar chemical properties like the given element. a) F(9)

b) O(8)

c) N(7)

12

d) Ar (18)

Science

CCE work sheet X Standard

3

w.s.x. 3a

Lesson – 13. Carbon and its compounds

1. X is a colourless liquid and has a sour taste. On cooling it is frozen to form ice like flakes. It is used as a preservative in food and for coagulating rubber from latex. a) Butyric acid

b) propionic acid

c) Ethanoic acid

d) succinic acid

2. Assertion: Unlike ethanol intake of methanol in very small quantities can cause death. Reason: Methanol is oxidised to methanol (formaldehyde) in the liver and methanol reacts rapidly with the components of cells. a) b) c) d)

Assertion and reason is true. Assertion true reason is wrong.’ Assertion and reason is wrong. Assertion wrong and reason is right.

3. Match : A. B. C. D.

Alcohol Ketone aldehyde carboxylic acid

A) A - 4 B-1 C-2 D-3

→ → → →

1. C=0 2. – OH 3. - COOH 4. – CHO

B) A- 2 B-1 C-4 D-3

4. C6H12O6 zymase a) 2C2H4 b) c) 2C2H5OH

C) A - 3 B-4 C-1 D-2

D) A - 3 B-4 C-2 D-1

------------- + 2Co2 b) 2 CH3 COOH d) 2CH3OH

5. Among the non-metals only graphite conducts electricity and the reason for this is a) Hexogen layers b) c) covalent bond

b) Vanderwaals force d) Unpaired electron.

6. A tetrahedral valency of carbon is a) b) c) d)

it could be difficult to gain four electrons forming c4- anions. it could be difficult to loss four electrons forming c4+ cations. it could be able to gain or lose four electrons sharing of four valence electrons to form four covalent bonds.

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7. Carbon atom, forms a covalent bond with monovalent elements and get the electronic configuration of a) Helium

b) Neon

c) Argon

d) Krypton

8. Identify the unsaturated hydrocarbon type a) H3C- CH2 - CH2- CH3 b) H3C- C ≡ C- CH3 c) H3C- CH -CH3 CH3 d) H3C – C –CH2 = CH2 CH3 a) (i) & (iii)

b) (ii) & (iii) c) (ii) & (iv) d) (iii) & (iv)

9. An element X reacts with ethanol in the presence of con H2SO4 to form ethyl ethanate which is a fruity smelling compound. The element X is? a) Ethyl Chloride b) Ethane c) Ethanol d) Di - ethyl ether 10. Identify the strong acid. a) Acetic acid b) c) Nitric acid

b) Oxalic acid d) Formic acid.

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