Science and Technology SEE 2075 question paper

What is the SI unit of electric current?

Write the chemical formula of washing soda.

What type of mirror is used as a rear view mirror in vehicles?

Which gas is filled in the electric bulb?

What is the chemical name of plaster of paris?

What is the valency of nitrogen?

What is the pH value of a neutral solution?

Which acid is present in lemon?

What is the chemical formula of carbon dioxide?

Which metal is extracted from bauxite?

What is the full form of CNG?

a) Define specific heat capacity. [1] b) A piece of metal of mass 50 g is heated to 100°C and then quickly transferred to 100 g of water at 20°C. The final temperature of the mixture is found to be 24°C. Calculate the specific heat capacity of the metal. (Assume no heat is lost to the surroundings.) [4]

a) What is meant by the term "refraction of light"? [1] b) A ray of light passes from air into water. If the angle of incidence is 30°, calculate the angle of refraction. (Refractive index of water = 4/3) [4]

a) What is meant by the term "electrolysis"? [1] b) Write the chemical equation for the electrolysis of water. [2] c) What is the role of an electrolyte in electrolysis? [2]

a) What is meant by the term "oxidation"? [1] b) Write the chemical equation for the reaction between magnesium and oxygen. [2] c) What is the valency of magnesium in this reaction? [2]

a) What is meant by the term "fertilizer"? [1] b) Write the chemical formula of ammonium sulphate. [1] c) What are the advantages of using chemical fertilizers? [3]

a) What is meant by the term "pollution"? [1] b) Write the causes of water pollution. [2] c) How can we prevent water pollution? [2]

a) What is meant by the term "synthetic fiber"? [1] b) Write the uses of synthetic fibers. [2] c) What are the disadvantages of using synthetic fibers? [2]

a) What is meant by the term "conservation of energy"? [1] b) Write the principle of conservation of energy. [2] c) Give examples of energy conservation in daily life. [2]

a) What is meant by the term "greenhouse effect"? [1] b) Write the causes of the greenhouse effect. [2] c) How can we reduce the greenhouse effect? [2]

a) What is meant by the term "biodegradable"? [1] b) Write the examples of biodegradable and non-biodegradable substances. [2] c) How can we manage biodegradable waste? [2]

a) What is meant by the term "acid rain"? [1] b) Write the causes of acid rain. [2] c) What are the effects of acid rain? [2]

a) What is meant by the term "photosynthesis"? [1] b) Write the chemical equation for photosynthesis. [2] c) What are the factors affecting photosynthesis? [2]

a) What is meant by the term "respiration"? [1] b) Write the chemical equation for respiration. [2] c) What is the difference between aerobic and anaerobic respiration? [2]

a) What is meant by the term "genetics"? [1] b) Write the uses of genetics in agriculture. [2] c) What are the ethical issues related to genetic engineering? [2]

a) What is meant by the term "biotechnology"? [1] b) Write the applications of biotechnology. [2] c) What are the advantages and disadvantages of biotechnology? [2]

a) What is meant by the term "nuclear fission"? [1] b) Write the equation for the nuclear fission of uranium-235. [2] c) What are the uses of nuclear fission? [2]

a) What is meant by the term "nuclear fusion"? [1] b) Write the equation for the nuclear fusion of hydrogen. [2] c) What are the advantages of nuclear fusion? [2]

a) What is meant by the term "renewable energy"? [1] b) Write the examples of renewable energy sources. [2] c) What are the advantages of using renewable energy sources? [2]

a) What is meant by the term "non-renewable energy"? [1] b) Write the examples of non-renewable energy sources. [2] c) What are the disadvantages of using non-renewable energy sources? [2]

a) What is meant by the term "electric circuit"? [1] b) Draw a simple electric circuit diagram with a cell, switch, and bulb. [2] c) What is the role of a switch in an electric circuit? [2]

a) What is meant by the term "magnetic field"? [1] b) Draw the magnetic field lines around a bar magnet. [2] c) What are the uses of magnets? [2]

a) What is meant by the term "electromagnet"? [1] b) Draw a diagram of an electromagnet. [2] c) What are the uses of electromagnets? [2]

a) What is meant by the term "electric motor"? [1] b) Draw a diagram of a simple electric motor. [2] c) How does an electric motor work? [2]

a) What is meant by the term "generator"? [1] b) Draw a diagram of a simple generator. [2] c) How does a generator work? [2]

a) What is meant by the term "transmission of electricity"? [1] b) Write the steps involved in the transmission of electricity. [2] c) What are the advantages of transmitting electricity at high voltage? [2]

a) What is meant by the term "domestic electric circuit"? [1] b) Draw a diagram of a domestic electric circuit. [2] c) What are the safety measures to be taken while using electricity at home? [2]

a) What is meant by the term "short circuit"? [1] b) What are the causes of a short circuit? [2] c) How can we prevent a short circuit? [2]

a) What is meant by the term "overloading"? [1] b) What are the causes of overloading? [2] c) How can we prevent overloading? [2]

a) What is meant by the term "fuse"? [1] b) How does a fuse work? [2] c) What are the advantages of using a fuse? [2]

a) What is meant by the term "earth wire"? [1] b) What is the purpose of an earth wire in a domestic electric circuit? [2] c) How is an earth wire connected in a domestic electric circuit? [2]

a) What is meant by the term "potential difference"? [1] b) How is potential difference measured? [2] c) Write the formula relating potential difference, work done, and charge. [2]

a) What is meant by the term "resistance"? [1] b) Write the factors affecting the resistance of a conductor. [2] c) Write the formula relating resistance, resistivity, length, and area of cross-section. [2]

a) What is meant by the term "Ohm’s law"? [1] b) Write the formula of Ohm’s law. [2] c) How can Ohm’s law be verified experimentally? [2]

a) What is meant by the term "series combination"? [1] b) Write the formula for the equivalent resistance of resistors in series. [2] c) What are the advantages and disadvantages of a series combination? [2]

a) What is meant by the term "parallel combination"? [1] b) Write the formula for the equivalent resistance of resistors in parallel. [2] c) What are the advantages and disadvantages of a parallel combination? [2]

a) What is meant by the term "magnetic effect of electric current"? [1] b) Write the uses of the magnetic effect of electric current. [2] c) How can the direction of the magnetic field around a current-carrying conductor be determined? [2]

a) What is meant by the term "electromagnetic induction"? [1] b) Write Faraday’s law of electromagnetic induction. [2] c) Write the uses of electromagnetic induction. [2]

a) What is meant by the term "alternating current"? [1] b) Draw a graph showing how the alternating voltage varies with time. [2] c) What are the advantages of using alternating current for the transmission of electrical energy? [2]

a) What is meant by the term "direct current"? [1] b) Draw a graph showing how the direct voltage varies with time. [2] c) What are the advantages of using direct current in certain applications? [2]

a) What is meant by the term "transformer"? [1] b) Draw a diagram of a step-up transformer. [2] c) Write the principle of a transformer. [2]

a) What is meant by the term "step-up transformer"? [1] b) Write the uses of a step-up transformer. [2] c) How does a step-up transformer work? [2]

a) What is meant by the term "step-down transformer"? [1] b) Write the uses of a step-down transformer. [2] c) How does a step-down transformer work? [2]

a) What is meant by the term "chemical reaction"? [1] b) Write the characteristics of a chemical reaction. [2] c) Write the examples of chemical reactions in daily life. [2]

a) What is meant by the term "endothermic reaction"? [1] b) Write the examples of endothermic reactions. [2] c) What are the characteristics of endothermic reactions? [2]

a) What is meant by the term "exothermic reaction"? [1] b) Write the examples of exothermic reactions. [2] c) What are the characteristics of exothermic reactions? [2]

a) What is meant by the term "redox reaction"? [1] b) Write the examples of redox reactions. [2] c) What is the role of oxidation and reduction in redox reactions? [2]

a) What is meant by the term "displacement reaction"? [1] b) Write the examples of displacement reactions. [2] c) What are the characteristics of displacement reactions? [2]

a) What is meant by the term "double displacement reaction"? [1] b) Write the examples of double displacement reactions. [2] c) What are the characteristics of double displacement reactions? [2]

a) What is meant by the term "combustion reaction"? [1] b) Write the examples of combustion reactions. [2] c) What are the characteristics of combustion reactions? [2]

a) What is meant by the term "corrosion"? [1] b) Write the causes of corrosion. [2] c) How can corrosion be prevented? [2]

a) What is meant by the term "rusting"? [1] b) Write the chemical equation for the rusting of iron. [2] c) How can rusting be prevented? [2]

a) What is meant by the term "alloy"? [1] b) Write the examples of alloys and their uses. [2] c) What are the advantages of using alloys? [2]

a) What is meant by the term "metallurgy"? [1] b) Write the steps involved in the extraction of metals. [2] c) What are the uses of metallurgy? [2]

a) What is meant by the term "periodic table"? [1] b) Write the uses of the periodic table. [2] c) How is the periodic table organized? [2]

a) What is meant by the term "atomic number"? [1] b) Write the significance of the atomic number. [2] c) How is the atomic number determined? [2]

a) What is meant by the term "mass number"? [1] b) Write the significance of the mass number. [2] c) How is the mass number determined? [2]

a) What is meant by the term "isotopes"? [1] b) Write the examples of isotopes. [2] c) What are the uses of isotopes? [2]

a) What is meant by the term "isobars"? [1] b) Write the examples of isobars. [2] c) What are the characteristics of isobars? [2]

a) What is meant by the term "valence electrons"? [1] b) Write the significance of valence electrons. [2] c) How are valence electrons determined? [2]

a) What is meant by the term "chemical bonding"? [1] b) Write the types of chemical bonding. [2] c) What are the characteristics of ionic and covalent bonds? [2]

a) What is meant by the term "ionic bond"? [1] b) Write the characteristics of ionic bonds. [2] c) Write the examples of ionic compounds. [2]

a) What is meant by the term "covalent bond"? [1] b) Write the characteristics of covalent bonds. [2] c) Write the examples of covalent compounds. [2]

a) What is meant by the term "metallic bond"? [1] b) Write the characteristics of metallic bonds. [2] c) Write the examples of metallic bonding. [2]

a) What is meant by the term "coordinate bond"? [1] b) Write the characteristics of coordinate bonds. [2] c) Write the examples of coordinate bonds. [2]