Question/Answer, related to Foundations

  1.    Give examples of cells which are multi nucleate?
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  3.    Suggest a method to liquefy atmospheric gases.
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  5.    For the metamorphosis of tadpoles which element must be available in water?
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  7.    Under which condition the evaporation of water will increase?
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  9.    What type of chemical reaction takes place when magnesium wire is burnt in air?
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  11.    What is the significance of boiling and melting point of an substance?
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  13.    Name the technique to separate camphor from salt?
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  15.    What is electric potential difference?
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  17.    Why is it advised to use iodized salt in our diet?
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  19.    What causes permanent hardness of water?
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  21.    Hypermetropia can be corrected by which lens?
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  23.    What factors could lead to the rise of a new species?
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  25.    What is ignition temperature of a fuel?
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  27.    What is ignition temperature of a fuel?
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  29.    What does the presence of smog in an area indicate?
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  31.    Which plant hormone is present in greater concentration in the areas of rapid cell division?
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  33.    State the method used for growing rose plants?
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  35.    In which condition gene ratio remains constant in a species?
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  37.    What is the mode of reproduction used by planaria?
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  39.    How propagation of ginger is done?
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  41.    Name the disease caused by protozoan and spread by an insect.
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  43.    Silver nitrate is used to study which organelle?
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  45.    Name the site of exchange of materials between the blood and surrounding cells
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  47.    What is the process of loosening and turning of soil called?
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  49.    Why water kept in an earthen pot becomes cool during summer?
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  51.    Name the substance that does not burn with flame.
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  53.    Why making of anti viral drugs is more difficult than making anti bacterial medicines?
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  55.    Why does a ray of light bend when it travels from one medium to other?
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  57.    Which acid is present in vinegar?
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  59.    Which species of honey bee is an italian species?
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  61.    Why flourine is more reactive than chlorine?
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  63.    Why bells in temples are made up of metal?
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  65.    When electric current is passed through a conducting solution, there is a change of colour in the solution. What does it indicates?
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  67.    Why did mendeleev leave some gap in his periodic table?
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  69.    Which metal produces hydrogen gas on reaction with dilute hydrochloric acid as well s sodium hydroxide solution?
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  71.    Which cell does not have perforated cell wall?
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  73.    Why is the disposal of improper waste a curse to the environment?
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  75.    Water stored in dams possess which energy?
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  77.    In case of negative work done the angle between the force and displacement is?
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  79.    What do black buck, elephant, python and golden cat together represent in a forest?
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  81.    Name the petroleum product used for surfacing of roads.
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  83.    Why the signal flow in a synapse only from the axonal end of one neuron to the dendritic end of another neuron but the reverse is not possible?
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  85.    Movement of food through oesophagusis due to?
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  87.    In what way is binary fission different from multiple fission?
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  89.     Is ‘nutrition’ a necessity for an organism? Discuss
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  91.     While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?
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  93.    Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.
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  95.    What are the two main components of environment?
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  97.    What is the best time for the removal of the weeds from the field?
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  99.    A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
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  101.    What is meant by saturated hydrocarbon?
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  103.    How could we supply nutrients to the soil?
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  105.    Define density and give its unit.
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  107.    What are outside raw materials used for by an organism?
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  109.    Why glucose is considered as organic compound?
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  111.    Parenchyma is a type of which tissue?
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  113.    What is meant by a pure substance?
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  115.    What were the limitations of Newlands’ Law of Octaves?
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  117.    Differentiate between homogeneous and heterogeneous mixtures with examples.
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  119.    How is oxygen and carbon dioxide transported in human beings?
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  121.    What are weeds? How can we control them?
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  123.    Name the unit in which colorific value of a fuel is expressed.
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  125.    Name any two abiotic components of an environment.
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  127.    Why is red colour selected for danger signal lights?
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  129.    What happens when water is added to quick lime?
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  131.    An inverted pyramid of biomass can be found in which ecosytem?
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  133.    Name the element which is used as the reference for atomic mass.
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  135.    An object moving in upward direction opposite to the gravitational force of earth performs which motion?
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  137.    What is the function of digestive enzymes?
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  139.     Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?
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  141.    Name one enzyme of our digestive system and write its function.
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  143.    Explain the process of formation of petroleum.
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  145.    Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth?
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  147.    What is a constellation? Name any two constellations.
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  149.    What happens to the current in the circuit at the time of short circuit?
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  151.    How does weeds affect the crop plants?
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  153.    Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron.
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  155.    What is the charge and mass of alpha particle?
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  157.    what is meant by analysis of financial statements? state any two imitations.
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  159.    Name the chemicals which were essential for origin of life?
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  161.    state the objective of motion study.
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  163.    Name the pigment which can absorb solar light?
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  165.    Why should a magnesium ribbon be cleaned before it is burnt in air?
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  167.    the standard resistance coils are made of maganin. why?
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  169.    If your eye glasses have focal length 60cm what is your near point?
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  171.    Why are we not able to see the things clearly when we come out of a darkroom?
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  173.    For dispersion of light through a prism which colour has maximum deviation?
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  175.     What would have been the colour of the sky if there had not been any atmosphere around the earth?
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  177.    Which property of light is analogous to sound
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  179.    what is the focal length of plane mirror?
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  181.    which feature of light is analogous to loudness of sound ?
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  183.    due to which property of light,sharp shadows of opaque object are obtained?
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  185.    which mirror have wider field of view?
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  187.    why submarines can sink as well as float on surface of water?
  188.    What are the thread like structures present in nucleus called?
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  190.    What is the unit of measurement used for expressing dimension of cells?
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  192.    What is the most important function of cell membrane?
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  194.    Which is the most suitable material for preparation of handles of cooking utensils?
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  196.    Which disease in humans is caused by virus?
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  198.    what is the difference between mass and weight?
  199.    What type of lens is used in correcting hypermetropia?
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  201.    What is the function of optic nerve in human eye?
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  203.     Why are we not able to see the things clearly when we come out of a darkroom?
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  205.     Why do we observe random wavering or flicking of the objects near a fire or on a very hot day?
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  207.    A student has mixed solution of lead nitrate and potassium iodide. What will be the colour of precipitates? Name the compound.
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  209.    A substance X is used for coating iron articles is added to blue solution of reddish brown metal Y, the colour of the solution get discharged. Identify X and Y and type of reaction.
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  211.    how to calculate number of electrons constituting 1 coulomb ?
  212.    an object has constant acceleration. if it moves with velocity v=12m/s at x=6 meter and velocity v=20 m/s at x=10m/s.. what is its acceeleration ?
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  214.    What is the difference between aerobic respiration and anaerobic respiration
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  216.    What ate the difference between artery and vein
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  218.    Differentiate between nuclear fission and nuclear fusion
  219.    What is the difference between breathing and respiration
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  221.    What is the difference between oxidizing agent and reducing agent
  222.    What is the difference between metals and non metals
  223.    Differentiate between displacement and double displacement reactions
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  225.    When does an electric short circuit occurs
  226.    Name the process of loss of water in the form of vapour from the aerial parts of the plants
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  228.    Give 3 reasons that make large scale use of nuclear energy prohibitive
  229.    Name the three kinds of cells present in Blood
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  231.    What type of mirror is used in box type solar cooker
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  233.    Explain different ways to induce current in a coil
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  235.    Give properties of magnetic lines of force
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  237.    Name the acid produced in our stomach
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  239.    Name the pigment which transports oxygen and Co2 in human body
  240.    How does the resistance of a wire vary with its area of cross section
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  242.     Why are sound waves called mechanical waves?
  243.    What is the centre of an atom called?
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  245.    What is the first element on the periodic table?
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  247.    What is the utility of tissues in multi-cellular organisms?
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  249.    Do you provide coaching for class 10th
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