PHYSICS
ELECTRICITY
1. The SI unit of potential difference
(A) volt (B) Ampere (C) coulomb (D) ohm
2. The SI unit of electric current
(A) volt (B) Ampere (C) coulomb (D) ohm
3. The SI unit of electric charge
(A) volt (B) Ampere (C) coulomb (D) ohm
4. The SI unit of resistance
(A) volt (B) Ampere (C) coulomb (D) ohm
5. The SI unit of electric power
(A) volt (B) Ampere (C) coulomb (D) Watt
6. The rate of energy consumed in an electrical circuit is electric.
(A) current (B) potential difference
(C) resistance (D) power
7. Write the diagrams of the symbols of the following components used in an electric circuit:
i) Rheostat or variable resistance
ii) Wire crossing without joining.
iii) resistance
iv) wire joint
(v) Dry cell
8. State Joule’s law of heating.
9. State Ohm's law
10. List the factors on which the resistance of a conductor depends
11. Write the mathematical form of Joule’s law of heating.
12. Name any two devices that work on the basis of Joule’s law of heating (name four appliances which work on the heating effect of electricity.)
13. Mention the role of fuse in the domestic circuit.
14. The potential difference between two points of a conducting wire is 1 V." Write the meaning of this statement.
15. Give a reason. The tungsten is used almost exclusively for filament of electric lamps.
16. Which is the better conductor among silver and copper? Why?
17. Alloys are used in electric heating devices. Why?
18. Among nichrome and copper wires, which of the wires is used in electric fan and in the coils of electric heater? Why?
Magnetic Effect of Electric current
1. Mention any four properties of magnetic field lines.
2. What precautionary measures have to be taken to avoid overload in domestic electric circuits?* (List any two suggestions to avoid the overload in domestic electric circuits.) (What are the reasons for overloading in an electric circuit?)
3. What does the thumb indicate in the right hand thumb rule ?
4. Write any two methods of increasing the magnetic field produced by a circular coil carrying electric current.
5. What is solenoid?
6. State Fleming’s left hand rule.
9. What is the potential difference between live wire and neutral wire in domestic electric circuit in our country?
10. How can electromagnet be prepared from a solenoid?
11. Draw the diagram indicating the field lines of the magnetic field around a current carrying straight conductor.
Light - Reflection and Refraction
1. What is reflection of light?
2. State two laws of reflection of light
3. What is the focal length of a mirror?
4. Write any two differences between concave mirror and convex mirror.
5. Write any two uses of a concave mirror.
6. Which mirror is used as a rear view mirror?
7. What is refraction of light?
8. State the laws of refraction of light.
9. State Snell’s law of refraction.
10. Mention any two differences between convex mirror and convex lens.
11. What is magnification? If the magnification of an image produced by a lens is + 2, then mention the type of the lens.
12. What is the power lens?
13. What does the negative sign indicate in the magnification value?
14. Define the Aperture
15. What is refractive index?
16. Concave mirror - Ray diagram
17. Convex mirror - Ray diagram
Human eye and colorful world
1. What is myopia (near sightedness ) (short sightedness)? What are the causes for myopia ? Name the type of the lens used to correct myopia.
2. What is Hypermetropia (far sightedness)? What are the causes? Name the type of the lens used to correct.
3. What is presbyopia? Mention the reasons and suggest a remedy for this defect?
4. What is Cataract?
5. Observe the below given diagram of the human eye. Name the eye defect indicated in this diagram and mention the lens used to correct this defect.
6. Explain the phenomenon of formation of the rainbow in the atmosphere.
7. What is the Tyndall effect ?
8. What is the colour of danger signal lights?
9. What is power of accommodation of eye?
10. Define the phenomenon expressed in below given figure. Which colour does H and M represent here?
11. What is dispersion of light?
CHEMISTRY
CHEMICAL REACTIONS AND EQUATIONS
1. Silver chloride turns grey when exposed to sunlight. This is because silver chloride (A) decomposes to form silver.
(B) combines with oxygen.
(C) decomposes to form chlorine.
(D) reacts with atmospheric moisture.
2. The type of chemical reaction in which reactants exchange their ions is
(A) Double displacement
(B) Displacement
(C) Decomposition
(D) Combination
3. List out the observations that help us to determine that a chemical reaction has mm been taken place
4. Chemical equations have to be balanced. Why?
5. Mention the measures that are followed to prevent rusting of iron.
6. What are redox reactions?
7. What is the difference between endothermic and exothermic reactions?
8. What is rancidity ? Write any two methods of preventing rancidity.
9. CuO + H2 → Cu + H2O. Identify the substance oxidised and the substance reduced in this equation.
10. What is oxidation and reduction?
11. What combination and decomposition reaction?
12. What is displacement and double displacement reaction?
ACID, BASES AND SALTS
1. State the properties of acids and bases
2. The chemical formula of bleaching powder is
(A) NaCl (B) Na2CO3
(C) CaCO3 (D) CaOCl2
3. As the pH value of a neutral solution increase,
(A) basic property decreases and number of OH− ions increases.
(B) acidic property increases and number of H+ ions decreases.
(C) basic property increases and number of OH− ions increases.
(D) acidic property decreases and number of H+ ions increases.
3. Draw the diagram of the arrangement of apparatus used to show the reaction of zinc granules with dilute sulphuric acid.
4. How do you detect a base using blue litmus paper?
5. Hydrochloric acid is considered as a strong acid. Why?
6. The pH values of four solutions are given in the following table. In these
a) Which solution has more concentration of H+ ions?
b) Name the neutral solution.
7. A solution of baking soda is commonly applied to the area of a honeybee stung area. Justify this action.
8. A solution of baking soda is commonly applied to the honey bee stung area. Justify this action.
9. Four solutions A, B, C and D when tested with universal indicator showed pH as 5, 2, 7 and 11 respectively. Which solution (i) has more hydronium ions? (ii) is neutral? (iii) is the weak acid?
10. What is acid rain?*
11. Write the chemical name and molecular formula and two uses
i) baking soda. ii) washing soda iii) bleaching powder iv) plaster of Paris
12. Which gas is liberated when an acid reacts with a metal carbonate?*
13. What is neutralization?
14. Name the acid present in the following substances. i) Curd ii) Gastric juice iii) vinegar iv) ant sting
METALS AND NON METALS
1. What are the applications of the thermite reaction?
2. What is roasting in metallurgy?
3. Name any two metals that are available in the pure form in the nature.
4. What is amalgum?
5. Draw the diagram to show the arrangement of the apparatus used in the electrolytic refining of copper.
6. Write the properties of ionic compounds.
7. Give reasons. Sodium metal is stored in kerosene.
8. Draw the diagram to show the action of steam on metals.
9. Explain the formation of sodium chloride molecule by the transfer of electrons. (Explain the formation of ionic bond between sodium and chlorine atoms.)
10. Explain the formation of magnesium chloride molecule by the transfer of electrons.
11. How is pure zinc obtained from zinc oxide?
12. Aluminium oxide is called an amphoteric oxide. Why?
13. How calcination differs from roasting? (Write any two differences between roasting and calcination)
14. Write any two differences between metal and non metals.
CARBON AND IT'S COMPOUNDS
1. A property of carbon that is responsible for giving rise large molecules is
(A) tetravalency
(B) catenation
(C) inflammability
(D) allotropism
2. Write any two differences between saturated and unsaturated carbon compounds.
3. What is the significance of hydrogenation? (What is the importance of hydrogenation of carbon compounds?)
4. Write the name and the molecular formula of the simplest hydrocarbon.
5. Name the salts responsible for the hardness of water?
6. Explain the cleansing action of soap on dirt.
7. Carbon atoms do not form C 4 + cation ions or C 4 - anions. Why?
8. Carbon compounds are found in the larger number in the nature. Why
9. Write the structural formulae of cyclopentane and propanol.
10. Write the molecular formula and structural formula of the following carbon compounds. i) Propanoic acid ii) Cyclohexane
11. Write the structural formula of the following carbon compounds: i) Butyne ii) Cyclohexane
12. Write the structures of the two structural isomers of butane. (Write the structures of n-butane and isobutane.)
13. Name the functional group present in the following carbon compounds: i) Propanal ii) Pentanol.
14. What is esterification?
15. Write the electron dot structure of nitrogen and methane molecules.
16. What is structural isomers?
BIOLOGY
LIFE PROCESSES
1. An enzyme that secretes by the pancreas to digest protein is
(A) amylase (B) pepsin
(C) trypsin (D) lipase
2. The function of stomata among the following is
(A) Exchange of gases
(B) Transportation of water and food
(C) Preparation of food
(D) Establishing osmotic pressure
3. What is the importance of xylem tissue in plants?
4. Double circulation of the blood is essential to maintain constant temperature in mammals. How?
5. The respiration rate of aquatic animals is faster than that is found in terrestrial animals. Why?
6. Draw the diagram to show the structure of open stomata.
7. What is Photosynthesis?
8. What is translocation?
9. What is transpiration?
10. What is the importance of transpiration in plants?
11. Nitrogenous chemicals that are separated from the blood by the kidney.
12. In which form the excess glucose is stored in plants and animals?
13. Name the structures of the humans small intestine that absorb digested food
14. Draw a diagram showing the structure of a nephron.
15. What are the differences between arteries and veins?
16. Write the differences between aerobic respiration and anaerobic respiration.
17. Name the enzyme present in saliva. Write its function.
18. Structures that prevent the collapsing of air passage part of trachea in the human.
19. Draw a diagram showing the schematic sectional view of the human heart.
20. State the events that occur during the photosynthesis in plants.
21. In the first stage of cellular respiration, the glucose molecule is broken down into which molecule in the cytoplasm?
22. Write any two differences between xylem and phloem.
23. Write any two methods used by plants to eliminate waste materials.
24. Explain the digestion process in the small intestine of humans.
25. What is the function of alveoli and villi?
26. Draw the diagram showing the structure of the human heart.
CONTROL AND COORDINATION
1. The plant hormone responsible for phototropism in plants is
(A) Auxin
(B) Cytokinin
(C) Abscisic acid
(D) Gibberellin
2. What is the function of abscisic acid in plants?
3. What is the function of synapse?
4. Name the prominent parts of reflex arc.
5. Which hormones are responsible for sexual maturation in humans?
6. What is reflex arc? In many animal’s reflex arcs have been found an effective way of functioning. Why?
7. What is geotropism? Name the plant part that is positively geotropic.
8. Write the example of chemotropism, hydrotropism, phototropism.
9. Name the hormones that perform the following functions in humans. i) Controlling the level of sugar in the blood. ii) Preparing the body to face the emergency situation.
10. Name the hormones that perform the following functions in humans.
(i) Controlling the sugar level in the blood. (ii) Prepare the body to deal with emergency situations.
(iii) Controlling the fats, proteins and carbohydrates metabolism.
11. Draw the diagram showing the structure of human brain. Label the following parts.
HOW DO ORGANISMS REPRODUCE
1. A common bacterial infection that spreads through sexual contact in human beings is
(A) Gonorrhoea
(B) AIDS
(C) Hepatitis B
(D) Warts
2. The process of producing new individuals in rhizopus is
(A) spore formation
(B) fragmentation
(C) budding
(D) regeneration
3. Part of flower that develops into fruit and part of the seed that develops into root respectively are
(A) Ovary and Plumule
(B) Plumule and radicle
(C) Ovary and radicle
(D) Ovary and ovule
4. the sequential stages that occur in the sexual reproduction of flowering plants are
(A) pollination, fertilization, seed, embryo (B) seed, embryo, fertilization, pollination (C) embryo, seed, pollination, fertilization (D) pollination, fertilization, embryo, seed
5. The embryo gets nutrition from the mother's blood with the help of special structure called
(A) Fallopian tube
B) Ovary
C) Uterus
(D) Placenta
6. How is the binary fission in amoeba differs from budding in hydra?
7. “Is Self-pollination possible in flowers that have only stamens?” Justify your answer.
8. List the three methods of contraception that are usually followed by human beings.
9. What is the function of the vas deferens and prostate gland in the human male reproductive system.
10. How does the menstrual cycle occur? Explain. (What happens if egg does not fertilize in human female reproductive system? Explain briefly.)
11. Write any two differences between self and cross pollination.
12. What are the changes that occur in a flower after fertilization?
13. Mention any four advantages of vegetative propagation.
14. What is the role of the placenta at the development stage of the embryo in the female uterus? (How does this embryo get nourishment in the mother’s womb? Explain)
15. How are the reproductive processes in hydra and planaria differ?
16. How does a fertilized egg in a female develop into an embryo in the uterus? In (women, how does a fertilized egg develop into an embryo in the uterus? ) (Explain the process of development of an egg into a foetus in human female reproductive system.)
17. Explain the important functions of i) Testis and ii) Seminal vesicle in male reproductive system in humans.
18. Write two examples for the organisms that reproduce by binary fission.
19. What are sexually transmitted diseases? Write any two examples.
20. What is asexual reproduction? What are the differences between fragmentation and fission?
21. What is the difference between self and cross pollination?
HEREDITY
1. In a zygote there are 24 pairs of chromosomes. Then the number of chromosomes present in the gametes are (A) 24 pairs (B) 48
(C) 6 pairs (D) 24
2. The generation in which Mendel performed cross pollination is
(A) Parent (B) Ovary
(C) F2 (D) F3
3. What is DNA replication?
4. How is the sex of a male child determined in humans?
5. A red flowering pea plant (RR) is crossed with a white flowering pea plant (rr). Show the result of F2 generation with the help of a checker board. Write the phenotypic ratio and the genotypic ratio of the plants obtained in F2 generation.
6. Red flowering tall pea plant (TTRR) is hybridised with white flowering dwarf pea plant (ttrr). Show the result of F2 generation with the help of a checker board and write the ratio of verities of plants.
7. Yellow seeds producing pea plant (YY) is hybridised with green seeds producing pea plant (yy). Show the result of F2 generation with the help of a checker board. Write the phenotypic and genotypic ratios of F2 generation.
8. Father only determines the sex of a child. Why?
9. A short pea plant (tt) is crossed with a tall pea plant (TT). Express the result obtained in the F2 generation with the help of checkerboard.
10. How is the baby girl sex will be determined? (Explain the role of chromosomes of father and mother in the determination of the sex of a child.)
11. Round and yellow seeds (RrYy) producing pea plants are self-pollinated. Express the result obtained in this crossing with the help of a checkerboard. Mention the types of the plants obtained.
OUR ENVIRONMENT
1. Ozone layer is a boon to the life on the earth. Justify.
2. The organisms of which trophic level in a food chain are most affected by biological magnification? Why?
3. What are biodegradable substances?
4. Which synthetic chemical is responsible for the depletion of the ozone layer?
5. Write two examples of decomposers.
6. Grass → Frog → Snake; If the amount of energy in the first trophic level of this food chain is about 100 J, What is the amount of the energy available for the organism at the third trophic level?
7. if all the wastes we generate are biodegradable, what kind of the effects this would impact on our environment? Discuss.
8. Define the following: i) Food chain ii) Biomagnification.
9. Mention the function of ozone. Name the chemical responsible for ozone depletion.
10. grass → Grasshopper → Frog → Snake : In this food chain. i) Which organism has more deposition of harmful chemicals? ii) Does the energy from the frog return to the grass-hopper? Clarify your answer.
11. Give reasons : a) Production of CFC free refrigerators is compulsory. b) Plastics remain for long period in the environment.
12. Mention the function of ozone layer in the atmosphere. Name the chemical responsible for ozone depletion.
13. What is non biodegradable substance?
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