SSLC SCIENCE IMPORTANT QUESTIONS
SECTION - I
(MARKS: 15)
Note: (i) Answer all the 15 questions.
(ii) Choose the correct answer from the four alternatives given in the brackets.
1. Which of the following is inheritable?
(An altered gene in sperm, an altered gene in testes, an altered gene in
Zygote, an altered gene in udder cell)
2. Somatic gene therapy (affects sperm, affects egg, affects progeny, affects Body cell)
3. Pick out the bacterial disease.
Meningitis, Rabies, Tetanus, Small pox.
4. The most serious form of malaria is caused by Plasmodium ________.
P.ovale, P.malariae, P.falciparum, P.vivax.
5. The first vaccine injected into a just born baby is ___________.
Oral polio, DPT, DPT and Oral polio, BCG.
6. One of the means of indirect transmission of a disease is _____.
Sneezing, Droplet from mouth, Placenta, Utensils of patients.
7. Spinal nerves are ________.
Sensory nerves, Motor nerves, Mixed nerves, Innervating the brain.
8. The “T” lymphocytes are differentiated to resist infection in
_____. (Parathyroid gland, lymph gland, thymus gland,
Adrenal gland).
9. The part of brain which controls emotional reactions in our body is
____. Cerebellum, Cerebrum, Thalamus, Hypothalamus.
10. in sexual reproduction of flowering plants,
The first event involved in this is.
(Fertilization, germination, regeneration, pollination)
11. The mango fruit is called as stone fruit. Because it has.
(Skinny epicarp, stony mesocarp, fleshy endocarp, hard endocarp)
12. The product of triple fusion which acts as nutritive tissue for the
development of embryo is (zygote, placenta, scutellum, endosperm)
13. Normal body temperature of man is __________.
98.4 – 98.6oF, 96.6 – 96.8oF, 94.4 – 98.6oF, 98.4 – 99.6oF.
14. In monotropa the special type of root which absorbs nourishment is
(Haustoria, Mycorrhizal root, Clinging root, Adventious root)
15. The autrotropic nutrition requires (CO2 and water, chlorophyll,
sunlight, all the above)
16. Odd one out.
(Plants, grasshopper, frog, tiger, snake)
17. Example for fossil fuel is
(Copper, iron, magnesium, coal)
18. Which of the following constitute a food chain?
(Grass, wheat and mango; Grass, goat and human; Goat, cow and
Elephant; Grass, fish and goat)
19. The mixture of gases used by deep sea divers is _______
(Helium- oxygen, oxygen-nitrogen)
20. Earth soil cannot store more nitrogen than it can hold.
Hence earth soil is referred to be in a state of _________.
(saturation, unsaturation)
21. From the given examples, form the pair of isotopes and
The pair of isobars
18Ar40, 17Cl35, 20Ca40, 17Cl37
22. Zn + 2HCl → ZnCl2 +H2 ↑
The above reaction is an example of
a) Combination reaction
b) Double displacement reaction
c) Displacement reaction
d) Decomposition reaction.
23. pH = - log10 [H+]. The pH of a solution containing hydrogen
Ion concentration of 0.001M solution is _____( 3 / 11 / 14)
24. When aqueous solution of silver nitrate and sodium chloride
are mixed _______
Precipitate is immediately formed (white / yellow / red).
25. Gold does not occur in the combined form. It does not
React with air (or) water. It is in ______. (native state /
Combined state)
26. An element which is an essential constituent of all
Organic compounds belong to _________ group.
(14th group / 15th group)
27. Buckminster Fullerene is the allotropic form of
(Nitrogen / Carbon / Sulphur)
28. IUPAC name of first member of alkyne is ……………
(ethene / ethyne)
29. One light year is equal to -----------
( 365.25 x 24 x 60 x 60 x 3 x 108 m , 1 x 24 x 60 x 60 x 3 x 08 m ,
360 x 24 x 60 x 60 x 3 x 108 m )
30. Screw gauge is used to measure the
Diameter of --------
(Crow bar, thin wire, cricket ball)
31. The acceleration in a body is due to ___________.
(balanced force, un-balanced force, electro static force)
32. The weight of 50 kg person at the surface of earth is ________.
(50 N, 35 N, 380 N, 490 N)
33. The physical quantity which is equal to rate of change of momentum is
(Displacement, acceleration, force, impulse)
34. Two electric bulbs have resistances in the ratio 1 : 2.
If they are joined in series, the energy consumed in these
Are in the ratio _________.(1 : 2, 2 : 1, 4 : 1, 1 : 1)
35. The atomic number of natural radioactive element is _________.
(Greater than 82, less than 82, not defined, at least 92)
36. An object is placed 25 cm from a convex lens whose focal length is
10 cm. The image distance is ________. (50 cm, 16.66 cm,
6.66 cm, 10 cm)
SECTION – II
Match the following vitamins with deficiency disease :
A
|
B
|
C
|
Vitamins
|
Deficiency diseases
|
Symptoms
|
Vitamin A
|
Nyctalopia
|
Night Blindness
|
Vitamin B1
|
Scurvy
|
Nerbvous disorder
|
Vitamin C
|
Rickets
|
Bleeding Gum
|
Vitamin D
|
Haemorrhage
|
Defective calcification of bones
|
Vitamin K
|
Beriberi
|
Profuse loss of blood
|
2. Sexually reproducing organisms produce offsprings with marked,
significant and visible variation. Asexually reproducing offsprings
show minor variations.
a) Do you agree with the above statements?
b) Among the following organisms list out the asexually reproducing
organisms. (Paramoecium, Euglena, Earthworm and Bird).
3. Bio-technology , the modern science in biology, has helped in producing
different types of products. One of the following group does not
have a product of bio-technology. Pick out and give reasons.
a) Enzymes, Organic acids, Steroids, Vaccines
b) Vaccines, Enzymes, Anti biotics, Organic acids
c) Anti biotics, Hormones, Steroids, Vaccines
d) Steroids, Enzymes, Anti bodies, Vaccines.
4. Marasmus and Kwashiorkar are both protein deficiency
defects. Marasmus differs from Kwashiorkar in enlarged
belly and swelling in the face. Are these
symptoms for the above diseases correct? If not, correct it.
5. Ramya is suffering from bleeding gum and loosening teeth.
On a diagnosis, it was found to have been caused by
Vitamin deficiency.
6. Copy the diagram and label any two parts in the group given.
7. This diagram is human brain, and the functions of different parts are given
Below.
Mark A and B in the parts of the brain, Corresponding with the function
8. Pick out the item which has sequential arrangements
a. zygotene -> Leptotene -> Pachytene -> Diplotene -> Diakinesis
b. Diakinesis -> zygotene -> Leptotene -> Pachytene -> Diplotene
c. Leptotene -> zygotene -> Pachytene -> Diplotene -> Diakinesis
9. Correct the statements if they are wrong.
a .alpha cells produce insulin and beta cells produce glucagon
b. cortisone suppresses the immune response
c. thymus gland is a lymphoid mass.
d. Ovary produces eggs and Androgen..
10. The methods of reproduction and the organisms are given below.
Match the type of reproduction to the suitable organisms.
Fission
|
Spirogyra
|
Yeast
|
Budding
|
Protozoans
|
Flatworms
|
Fragmentation
|
Bryophyllum
|
Bacteria
|
11. Redraw the diagram and label the following parts.
a) Exine b) Tube nucleus
12. In balsam plant the seeds fall off far away from the mother plant.
a) Is this statement correct or incorrect?
b) Give reason.
13. One of the following groups contains a non mammalian animal.
Pick up the group.
a. dolphin, walrus, porcupine, rabbit, bat
b. elephant, pig, horse, donkey, monkey
c. antelope, deer, cow, buffalo, black buck
d. dog, cat, crocodile, lion, tiger
14. Redraw the diagram and label the following parts
15. Redraw the diagram and label the following parts
16. Match the methods of nutrition of special organs with suitable examples
Autotrophs
|
Mycorrhiza
|
Cuscutta
|
Parasites
|
chlorophyll
|
Monotropa
|
Saprophytes
|
Haustoria
|
Hibiscus
|
17. Sugar is converted into alcohol. From the above statement what kind of
Process takes place? Which micro organism is involved?
18. Pick out the odd one: The parts of the alimentary canal are
(Pharynx, mouth, buccal cavity, pancreas)
19. Study the food chain. Paddy -> Mouse -> Snake -> Kite
If the producer has a STORED UP ENERGY OF 500 k CAL. How much
Of it goes to the organism at the third trophic level get from it?
20. Study the illustration and answer the question.
a. which line (A or B) represent the flow of energy?
Why do you say so?
b. Give an example of a decomposer.
21. Match the suitable renewable and non-renewable
Sources
|
A
|
B
|
C
|
Renewable
|
Coal
|
Wind
|
Petroleum
|
Non-renewable
|
Hydrogen
|
Natural gas
|
Solar energy
|
22 A non renewable resource is a natural resource if it is replaced by natural
process at a rate comparable or faster than its rate of consumption
by humans.
Read this statement and confirm whether it is correct or incorrect. If it is
incorrect give correct statement.
23. Distinguish between the saturated and unsaturated solution
using the data given below at a temperature of 25oC
A. 16g NaCl in 100g water
B. 36g NaCl in 100g water
24. Find the concentration of solution in terms of weight percent if
20 gram of common salt is dissolved in 50 gram of water.
25. You are given the values of mass of one volume of oxygen
gas and the mass of one volume of hydrogen.
By applying Avagadro’s law how will you establish the
relation between vapour density and molecular mass of a gas?
26. The pH values of certain familiar substances are given below
substance
|
PH Value
|
Blood
|
7.4
|
Baking soda
|
8.2
|
Vinegar
|
2.5
|
Household
ammonia
|
12
|
analyse the data in the table and answer the following questions
a) Which substance is acidic in nature?
b) Which substances are basic in nature?
27. Why does the colour of copper sulphate change when an iro
nail is kept in it? Justify your answer.
28. Assertion: Greenish layer appears on copper vessels
if left uncleaned. Reason: It is due to the formation
of layer of basic copper carbonate
Give your correct option.
a) assertion and reason are correct and relevant to each other
b) assertion is true but reason is not relevant to the assertion
29. Assertion In thermite welding, aluminium powder and Fe2O3 are
used. Reason Aluminium powder is a strong reducing agent. Does the
reason satisfy the assertion?
30. Diamond is the hardest allotrope of Carbon. Give reason
For its hardness.
31. An organic compound (A) is widely used as a preservatives
In pickles and has a molecular formula C2H4O2. This
Compound reacts with ethanol to form a sweet
Smelling compound (B).
(i) Identify the compound A and B.
(ii) Name the process and write corresponding chemical equation.
32. Least count of a screw gauge is an important concept related
to screw gauge. What do you mean by the term?
Least count of a screw gauge.
33. Match the items in group A with the items in group B
Group-A
|
Group-B
|
Small dimensions
|
Kilo meter
|
Large dimensions
|
Screw gauge
|
Long distances
|
Scale
|
Small distances
|
Light year
|
Altimeter
| |
34. Correct the mistakes, if any, in the following statements.
a. One Newton is the force that produces an acceleration of
1 ms-2 in an object of 1 gram mass.
b. Action and reaction is always acting on the same body.
35. From the following statements write down that which is not?
Applicable to mass of an object
a. It is a fundamental quantity
b. It is measured using physical balance.
c. It is measured using spring balance.
36. Correct the mistakes, if any, in the following statements.
a) A good source of energy would be one which would do
a small amount of work per unit volume of mass.
b) Any source of energy we use to do work is consumed and
Can be used again.
37. You know that myopia is a common refractive defect of vision.
Person with this defect can see only nearby objects clearly. Using
Concave lens of suitable power this defect is corrected.
a) Mention other two types of defects like this.
b) Explain how we can correct it.
38. What is called heredity?
39. What is called monohybrid cross?
40. Define phenotype?
41. Define genotype?
42. Match the following:
BCG
|
Tuberculosis vaccine
|
DPT
|
Diphtheria,Pertussis,Tetanus,vaccine
|
MMR
|
Mumps,Measles,Rubella
|
DT
|
Diphtheria,tetanus
|
TT
|
Tetanus toxoid
|
43. What is antigens?
44. What is called natural active acquired immunity?
45. Match the disease and causative agents.
I) Influenza a) Human rhino virus
ii) Common cold b) H1 N1 Virus
iii) Tuberculosis c) Microsporum
iv) Ring worm d) Mycobacterium
46. Match the column A with column B
A B
1. Current a) Volt
2. Electric Potential b) Ohm
3. Resistance c) Watt
4. Electric Power d) Ampere
47. Calculate the number of moles in 24.092 * 10power 22 molecules of water
48. Match the column A with column B
A B
i) Fossil fuel a) cow dung
ii) Hydro Power Plant b) Heat
iii) Bio-Mass c) coal
iv) Thermal power plant d) water
49. We see rainbow in the sky sometimes after the rain
(a) what is a spectrum?
(b) write the sequence of colours in a spectrum.
50. Match the following.
i) Garden pea plant a) Dolly
ii) Mono hybrid cross b) Vaccine
iii) Edward jenner c) 3:1
iv)Dr. Ian Wilmut d) Pisum sativum
SECTION III
PART - I
- a) What is genetic engineering?
b) What are the uses of Genetic engineering?
2. (a) Vaccine is to prevent the body from diseases. Suggest the
Immunization schedule for the baby in the first six months.
(b) What are all the disease that can be prevented as per the schedule?
3. Human evolution has a record of changes for the past of 15 milion
years.
a) Name the different species of mankind in chronological order
from primitive to modern man.
b)When were the primitive caves developed.?
c) Narrate the life led by early man like hominids.
4. Kala has delivered a baby,
a. Suggest the immunization schedule for the baby, in the
first six months
b. What are all the diseases that can be cured as per the schedule?
5. Compare aggregate fruit with multiple fruit with suitable examples
6. Describe the structure of dicot seed.
7. a) Write the two events involved in the sexual reproduction of
flowering plant.
b) Discuss the first event and write the types
c) Give advantages and disadvantages of that event.
8. Is the pressure created in xylem enough to conduct water in tall trees.
Give reasons.
9. Compare the respiration in higher plants with the respiration in lower
Plants
10. Smoke, smoke everywhere smoke. Do you agree this situation?
Is good for health. List out the harmful effects of coal burning.
11. In your area there is scarcity of water due to this the people are affected.
12. Differences between atom and molecule
13. Factors influencing the rate of the chemical reaction?
14.a) List out the classification of acids
b) list out the uses of acids?
15.a) Differences between minerals and ores
b) List out the uses of aluminium
17. Iron reacts with con. HCl and con.H2SO4. But it does
not react with con. HNO3. Suggest your answer with
proper reason.
18. X is a silvery white metal. X reacts with oxygen to form Y.
The same compound is obtained from the metal on reaction
with steam with the liberation of hydrogen gas. Identify X and Y.
19. Write the common name and IUPAC name of the following.
a) CH3CH2CHO b) CH3COCH C) CH3 – CH - CH3 d) CH3 COOH OH
e) HCHO
20. Newton’s first law of motion gives a qualitative definition
of force. Justify.
b) The figure represents two bodies of masses 10 kg and 20 kg and
moving with an initial velocity of 10 ms-1 and 5 ms-1 respectively.
They are colliding with each other. After collision they are moving
with velocities 12 ms-1 and 4 ms-1 respectively. The time of collision
be .2 s. Then calculate F1 and F2.
21.
1. (b) The retractive index of diamond is 2.42. What is the meaning
of this statement in relation to speed of light?
2. a) Re draw the above diagram.
b) This diagram represents _________
c) Label the parts of the diagram.
d) Write the principle of the name of the
device denoted by this diagram.
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