CTET Science content Paper 2 previous year questions part-1

CTET December – 2019:

Food:

1. ‘X’ is a chemical present in our stomach and is necessary for the digestion of food. When ‘x’ is secreted in excess, it causes health problems like indigestion. ‘Y’ is a chemical used to treat this condition. What could be ‘X’ and ‘Y’  – X is HCL and Y is the milk of magnesia.
2. Bacteria is not used in the process of baking of bread but used in
   1. formation of curd, fermentation of sugar cane, and nitrogen fixation.

Materials of daily use:

1. The statements which are correct regarding image formation in the plane mirror – Image is erect, Image is laterally inverted, The image size is the same as that of the object.
2. Matching order:
   1. Acetic acid – vinegar, Lactic acid – Curd, Oxalic Acid – Spinach, Ascorbic acid – Citrus fruits.
3. The correct statement is the range of a laboratory thermometer is greater than that of a clinical thermometer.

The world of the living:

1. The conservation process is different from that of deforestation, desertification, erosion.
2. Not correct statements crystallization is a chemical change. True statements include the following:
   1. respiration is a chemical change
   2. photosynthesis is a chemical change 
   3. Digestion is a chemical change
3. The function of gills in the fish is to absorb dissolved oxygen from water.
4. The animal which has the following features:-
   1. Long back ones, Many muscles, Body curves into many loops for moving forward – Snake
5. A not true statement – All arteries carry oxygen-rich blood. Other true statements are
   1. all arteries carry oxygen from the heart to other parts
   2. arteries have thick walls,
   3. arteries have elastic walls.
6. Correct statements – Pashmina shawl is made from the hair of goats and camel wool is used to make carpets.

Moving things people and ideas:

1. The following represents an ascending order as per the size of particles:
   1. clay, silt, sand, gravel, rock.
2. Observing one’s image in a plane mirror the distance between herself and the mirror is 5m. She moves 1 m towards the mirror. The distance between herself and her image now is 8mts.
3. A pendulum oscillates 30 times in 3 seconds. Choose correct statements from the following
   1. Frequency = oscillation/time = It’s time period is 10 Sec and frequency is 0.1Hz.
4. Incorrect statements – the calorific value of biogas is more than that of LPG. However, the truth is the following:
   1. Kerosene>coal, coal > wood, CNG> diesel

Fuel	Calorfic value (KJ/Kg)
1. LPG	55,000
2. CNG	50 000
3. Kerosene, diesel –	45,000
4. Biogas –	35 to 40,000
5. Coal 6.Wood	25-33,000 17-22,000

1. A bus travels at a speed of 50 km/hr for 12 minutes and then at a speed of 40 km/hr for the next 18 minutes. Total distance covered by the bus during this time is
   1. S=D/T = 50*12/60+40*18/60 = 12+10 = 22 km
2. Incorrect statements:
   1. Ball bearings are used to increase friction between parts of a machine
   2. Friction between 2 surfaces in contact can never be eliminated on earth
   3. Rolling friction is less than sliding friction
   4. The friction force on an object moving through a fluid depends upon its shape.
3. Correct statements from the following: – Zinc can replace copper from copper sulfate solution.
   1. Incorrect:
      1. Iron can replace zinc from a zinc sulfate solution.
      2. Copper can replace Iron from Iron sulfate solution.

How things work (Electric current and circuits, Magnets):

1. A blade can be used to complete an electric circuit if one runs out of connecting wire.

CTET July-2019:

Food:

1. The following nutrients are present in milk – protein calcium and vitamin D.
2. Column -A(Parts of Digestive system) Column -B (Functions)
   1. Liver – Largest gland
   2. Stomach – where protein digestion starts
   3. Gall bladder – where bile juice is stored
   4. Pancreas – releases digestive juices into the small intestine

Materials of daily use:

1. The nonmetal used in the purple-colored solution applied to wounds as antiseptics – Iodine.
2. Not a byproduct of petroleum –coke
   1. other byproduct includes oil, paraffin wax, bitumen.

The world of the living:

1. The Incorrect statement regarding ‘Air’ is air is not present in the soil. However, the true statements include
   1. air occupied space
   2. air has space
   3. air plays an important role in the water cycle
2. Col – A and Col – B
   1. Yeast – budding 
   2. Potato – vegetative propagation 
   3. Algae –   fragmentation
   4. Fungi – Spore formation
3. About cells, the true statement is cells of tissue have a similar structure.
4. The following acids found in ant’s sting – Formic acid
5. The following organisms can prepare their  own food by photosynthesis – algae
6. The following features help polar bears adapt in extremely cold conditions
   1. white fur, long curved sharp claws fat under the skin

Moving things people and ideas:

1. The set which represents communicable diseases typhoid, malaria, swine flu, and polio.
2. The correct statements are  – concave mirror always forms an erect as well as an inverted image.
3. 3.7 kg of fuel is completely burnt to give off 1.665*10^8 joules of energy. The calorific value of the fuel (heat upon mass)in std unit is 1.665*10^8/ 3.7*10^8 = 45000 KJ/kg.
4. The sets which contain only the units of measuring distance
   1. cubit, meter, light year.
5. Sameer rolls his marble on three different surfaces spread out on floor – taut cellophane sheet, carpet, and newspaper. The force of friction acting on the marble in the increasing order is
   1. cellophane sheet, newspaper, carpet
6. An object is moving linearly with a uniform velocity. If time is represented along x-axis – Correct statement
   1. the velocity-time graph of the motion will be a straight line parallel to the x-axis.
7. Aman keeps a plastic bottle a wooden spoon and a metallic spoon in a closed room overnight. The room temperature is 30 deg cel. In the morning he records the temperature of 3 objects T1, T2, and T3. The relations between them indicates –
   1. T1=T2=T3

How things work (Electric current and circuits, Magnets):

1. Amrita is trying to set up an electric circuit. She runs short of connecting wires. The materials that can be used to complete the circuit – steel wire
   1. Since steel is a metal and it conducts electricity.

CTET December-2018:

Materials of daily use:

1. Vaccine for smallpox was discovered by Edward Jenner.
2. Sodium benzoate is used as a preservative.
3. Yeast is used for the production of alcohol.
4. Magnesium hydroxide is used as ant-acids.
5. Not a product of petroleum – CNG
   1. Byproduct includes – kerosene, paraffin wax, and Bitumen
6. Sarika took distilled water in a bottle and tried to find whether it conducts electricity or not. She is likely to find that it is an insulator.

The world of the living:

1. The longest snake found in the world is reticulated pythons.
2. Mitochondria-ATP:: Ribosome: protein
3. Yoga is done by people in the world because it keeps people healthy.
4. Magnesium hydroxide is used as ant-acids.
5. Diabetes is controlled by the insulin hormone.
6. The red data book contains a record of endangered species.
7. Column – A and Column- B
   1. Canopy – Branches of all trees.
   2. Decomposer – Microorganism.
   3. Humus – Dead plants and animal tissues.
   4. Porcupine  – A wild animal.

Moving things people and ideas:

1. If the frequency of a simple pendulum is 2Hz how many oscillations it completes in 16 sec
   1. Frequency = oscillation/time
   2. No. of oscillations = 32 Hz.
2. The metals which burn when kept in the air – sodium
3. The gases that burn with pop sound -hydrogen
4. Non-contact force examples of magnetic forces, Gravitational force, and electrostatic force.
5. Why are the soles of the shoes treaded – To increase friction.

How things work (Electric current and circuits, Magnets):

1. Not correct statement – There is a minimum limit of current which can safely flow in the electric circuit. Correct statements include
   1. there is a minimum amount of current that can safely flow through an electric circuit
   2. Fuses are inserted in the electric circuits of all the buildings.
   3. If the proper fuse inserted into the circuit it will blow off if the current is more than the safe limit.

Natural Phenomenon:

1. The following places are most likely to be affected by a cyclone – Puri.
2. The change in the season of the earth occurs because – the axis of rotation of the earth is tilted with respect to the plane of its orbit.

CTET February – 2016:

Food:

1. cellulose-rich food substance are considered an essential component of a balanced diet of human beings. The correct statement about cellulose? – human beings do not have cellulose digesting enzymes.

Materials of daily use:

1. Statement – A: the range of clinical thermometer is from 35-degree Celsius to 42-degree celsius
   1. Statement – B = the range of lab thermometer os from 10 deg cel to 110-degree cel – Only statement A is correct
2. Statement- A – Husk is separated from heavier seeds of grain by winnowing
   1. Statement-B – Difference in the size of particles in a mixture is utilized to separate them by the process of sieving and filtration
   2. Ans: Both statements are true
3. The pressure in the fluid that is at rest acts in all directions.
4. Mg reacts with oxide to form a base it reacts with red litmus to blue
5. copper cannot displace zinc from its solution give the reason – copper is less reactive than zinc.
   1. zinc appears above copper in the reactivity series.

The world of the living:

1. A group of diseases that are caused by bacteria TB, pneumonia and typhoid.
2. Column a and b
   1. Aspergillus – Fungi
   2. Lactobacillus – Bacteria
   3. paramoecium – Protozoa
   4. spirogyra – algae
3. The joint between the head and the upper jaw is an example of a fixed joint.
4. Identify the correct statement rain is the ultimate source of water.
5. All the cells which are single-celled are paramoecium, hen’s egg, and zygote but the embryo is multicellular.

Moving things people and ideas:

1. The statements that are true about veins in the human circulatory system?
   1. veins have thin walls.
   2. veins carry blood from different organs to the heart.
2. Statement- A – Husk is separated from heavier seeds of grain by winnowing
   1. Statement-B – Difference in the size of particles in a mixture is utilized to separate them by the process of sieving and filtration
   2. ans: Both statements are true.
3. The pressure in the fluid that is at rest acts in all directions

How things work (Electric current and circuits, Magnets):

1. An electric circuit is set up in such a way that the positive terminal of a battery V is connected to a bulb B1 which is connected to a resistor R which is connected to bulb B2. B2 is finally connected to the negative terminal of the battery. Both thee bulbs are glowing. If the value of R is increased then,
   1. Both B1 and B2 will become dimmer.

Natural Phenomena:

1. There are two planets in our solar system whose periods of revolution around the sun are less than those of our earth, but their periods of rotation are more as compared to those of earth. These planets are mercury and venus.
2. The air near a heat source gets hot and rises. The air from the sides comes in to take its place. This is the way in which the air gets heated by oil heaters. This process is called convection
3. A book is lying rest on the surface of a table. The statement which is true about the forces acting on the book is there is a pair of balanced force acting on it.
4. The place which is most likely to be affected by a cyclone Puri.

Natural resources:

1. The melting points (in degree celsius) of sulfur (S), Aluminium (Al), and iron(Fe) are 113, 666, and 1535 respectively. The correct answer – Al and Fe are solids at 200-degree celsius.

CTET May-2016:

Materials of daily Use:

1. The melting point of sulfur is 113* cel and its boiling point is 445* cel. Incorrect statement – Sulphur is liquid at 450* cel
   1. sulfur is solid at 90*cel and 20* cel.
   2. sulfur is liquid at 400* cel.
2. A rubber sucker when pressed on a surface sticks to it because of atmospheric pressure.
3. A book is placed in front of a plane mirror. The observer is standing behind the book. The image of this book will be formed behind the mirror and it will be inverted and at the same distance as the observer is from the mirror
4. When candle burns
   1. Physical changes – its size decreases, there is melting of wax, melted wax also solidifies, 
   2. chemical change-  flame and soot can be seen
5. Identify the incorrect statement – an acid and base neutralize each other to form a salt and salt is always neutral
   1. Correct statements – acid are sour in taste whereas base is bitter in taste and soapy to touch.
   2. acid turns blue litmus red and bases turn red litmus blue
      1. acq.HCL with blue litmus turns red and NaOH with Red litmus turns blue
   3. the solution of a substance that show different colors in acidic, basic and neutral solution are called indicators
6. Sodium and potassium are stored in kerosene. Appropriate Reasons
   1. Both are highly reactive and react with oxygen in the atmosphere.
   2. Kerosene helps cuts off the reaction of the metals with oxygen in the air.

The world of the living:

1. Each cell in our body contains DNA. We also have proteins and fats in our body. What is common among DNA, proteins, and fats  – all contain acids.

Moving things peoples and ideas:

1. Column- A (Scientist) and Column- B (Discoveries)
   1. Alexander Flemming – Penicillin
   2. Edward Jenner – smallpox vaccine
   3. Louis Pasteur – Fermentation
   4. Robert Koch – Bacillus anthracis
2. Radhika’s gums were often bleeding and her wounds were taking a long time to heal. Her diet could be deficient in vitamin C
3. Two endocrine glands secrete their hormones when they receive orders from pituitary through its hormones- adrenal and pancreas.
4. Column-A – (cell parts) and Column-B (Functions of cell parts):
   1. Cell wall – Supports the cell
   2. cell membrane – controls what passes in and out of the cell
   3. cytoplasm – cell reaction happens in it
   4. Nucleus – controls what happens in it
5. A combination of components of an animal cell-cell membrane, cytoplasm, Nucleus and vacuole
   1. An animal cell does not have a cell wall.
6. A group of fungi – aspergillus, penicillium, and bread mold.
7. About breathing –
   1. it is a process that provides oxygen to the body.
   2. This process helps the body to get rid of carbon dioxide.
8. All of the following are non-contact forces except —–> frictional forces
   1. Gravitational, Magnetic and electrostatic forces.

Natural Phenomena:

1. The planet revolves around the sun on a definite path. Planets in the increasing order of their period of revolution
   1. venus > earth> Saturn > Uranus
2. The occurrence of seasons on earth is due to the fact that – earth’s axis is tilted
3. Heat is transferred by the process of conduction in the sea breeze and land breeze
4. In the event of a thunderstorm – one should use an umbrella with a metallic end.

CTET September – 2016:

Food:

1. The function of saliva is to convert starch into sugars.

Materials of daily Use:

1. Non-metals and their uses:
   1. Iodine – Healing wounds
   2. Mercury – Thermometer
   3. Aluminum – Food packaging
   4. Chlorine – Water purification
2. A true statement – melamine is a thermoplastic while bakelite is a thermosetting plastic.

The world of the living:

1. Odd one out embryo, egg, ovum, and gametes.
2. The correct statement both inhaled and exhaled air contains oxygen
3. The reproducing part of the ginger stem, not leaf, root, and seeds. Liquids which are conductors of electricity – Vinegar and salt solution
   1. however it does not conduct in a sugar solution and distilled water.
4. The correct statements,
   1. plants can survive for some time even without photosynthesis but not possible to stay without respiration
   2. photosynthesis and respiration both are essential for the survival of plants
   3. Photosynthesis and respiration both are a simultaneous process in plants during the daytime.
5. Which type of leaf pattern that is leaf venation and root types are present in bamboo– parallel venation and fibrous root.
6. Not a single flower but a group of flowers is a sunflower

Moving things peoples and ideas:

1. the arrangements of teeth from front to back – incisors, canine, and pre-molars  molars
2. A block of wood is lying at rest on a table. About the forces acting on it,
   1. There is a pair of balance force acting on it.
3. Ritu is standing in front of a plane mirror. The distance between Ritu and her image is 10m. If she moves 2m towards the mirror then the dis between Ritu and her image is 6 m
4. 3 test tube -with NaCl, NaOH, dil.HCL is added to a drop of phenolphthalein. On observation indicates
   1. x is pink, Y is pink and z is colorless.
      1. Phenolphthalein, when added to a basic soln, remains purple color. But when added to the acidic solution becomes colorless.
5.  In plants and trees, water goes up high due to suction pull. The phenomenon which causes this suction pull is transpiration.
6. The teacher takes a small amount of sulfur in a spoon and burns it. She then puts the spoon into a tumbler with a lid to ensure that the gas produced does not escape. After a few minutes, she adds water to the tumbler. 
   1. When sulfur is burned in the air it forms sulfur di-oxide and S+O2 – So2
   1. when sulfur-di-oxide is dissolved in water it forms sulfurous acid. So2+H20 —-> SH2O3
   2. If blue and red litmus is put into the tumbler which turns a blue color of the litmus into the red.
7. A bicycle is moving on a straight road at a constant speed. the wheels of the cycles exhibit circular, translational and periodic motion.
8. A block of wood is lying at rest on a table. The forces acting on it are- there is a pair of balanced forces acting on it.
9. Class 6 students were asked to figure out that the property of solubility of salt in water can be used to separate a mixture of sand and salt. As a supporter of inquiry-oriented pedagogy you would provide a mixture of sand and salt to students ask them to think up different ways of separation and help them in trying out their ideas.

How things work (Electric current and circuits, Magnets):

1. Not correct about magnets – Attraction is a sure test of magnetism.
   1. Correct statements are:
      1. Magnetic field lines originate from the north pole and merge at the south pole of a magnet
      2. Like pole of a magnet repel each other
      3. A magnetic field is stronger at the poles of a bar magnet.

Natural Resources:

1. Suppose A farmer living at a place of black soil. If the climate of the region is warm to grow fiber yielding plants in your fields, he would prefer cotton.