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Jeevith Publications 2nd PUC Kannada PDF Download. We provided the Jeevith Publications 2nd PUC Kannada PDF Download in this post for free so that you can practice well for the exam.
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Jeevith Publications 2nd PUC Kannada PDF Download for Students
Which of the following situations represents a chemical change?
(A) Splitting of white Light into seven different colours using a prism
(B) Softening of vegetables during cooking
(C) Drying of a moist lump of soil making it brittle
(D) Dissolution of Salt in water
Option b - Softening of vegetables during cooking
During the decomposition of water, which type of energy is released?
(A) Light
(B) Heat
(C) sound
(D) Acid
Option b - Heat
Which one of the following illustrates a physical change?
(A) Formation of a black layer on silver objects
(B) Combustion of a candle
(C) Conversion of milk into curd
(D) Dissolving sugar in water
Option d - Dissolving sugar in water
The transformation of liquid water into water vapour is known as
(A) Natural change
(B) Physical change
(C) Chemical change
(D) Biological change
Option b - Physical change
Pasteurization refers to the process in which
(A) Milk is stored at extremely low temperature for one day
(B) Milk is heated continuously for several hours
(C) Milk is heated for a fixed duration and then rapidly cooled
(D) None of the above
Option c - Milk is heated for a fixed duration and then rapidly cooled
Pasteurization is mainly associated with
(A) Making milk free from harmful microorganisms
(B) Removal of water from milk
(C) Conversion of milk into curd
(D) Separation of milk components by distillation
Option a - Making milk free from harmful microorganisms
Which of the following statements is incorrect?
(A) Solutions generally have a higher boiling point than pure water
(B) Adding a solute increases the water potential of a solution
(C) Vapour pressure of a solution is less than that of pure water
(D) Osmotic flow can be stopped by applying external pressure
Option b - Adding a solute increases the water potential of a solution
The presence of impurities in a liquid causes its boiling point to
(A) Increase
(B) Decrease
(C) Remain unchanged
(D) Have no relation with impurities
Option a - Increase
Water boils at a temperature lower than 100°C at high altitudes because
(A) Atmospheric pressure is reduced at higher elevations
(B) Gravitational force is weaker
(C) Strong winds prevail in mountainous regions
(D) None of these reasons
Option a - Atmospheric pressure is reduced at higher elevations
Fog is an example of which type of colloidal system?
(A) Liquid dispersed in a gas
(B) Gas dispersed in a liquid
(C) Solid dispersed in a gas
(D) Liquid dispersed in a liquid
Option a - Liquid dispersed in a gas
The method of chromatography is mainly used to
(A) Detect coloured substances
(B) Study Molecular structure
(C) Carry out dry distillation
(D) Separate components present in a mixture
Option d - Separate components present in a mixture
The direct change of Solid camphor into vapour is termed as
(A) Vaporisation
(B) Freezing
(C) Melting
(D) Sublimation
Option d - Sublimation
Which of the following is an example of corrosion?
(A) Formation of a black layer on silver
(B) Appearance of green coating on copper
(C) Rusting of iron producing a brown layer
(D) All of the above
Option d - All of the above
Which of the following represent chemical changes?. 1. Crystallization of sodium chloride 2. Melting of ice 3. Souring of milk
(A) Only 1 and 2
(B) Only 3
(C) 1, 2 and 3
(D) None of the above
Option b - Only 3
Assertion (A): Increasing temperature speeds up a chemical reaction. Reason (R): Higher temperature increases the speed of Molecular motion.
(A) Both A and R are correct and R explains A
(B) Both A and R are correct but R does not explain A
(C) A is correct but R is incorrect
(D) A is incorrect but R is correct
Option a - Both A and R are correct and R explains A
Assertion (A): Mixing Salt with ice can produce temperatures below 0°C. Reason (R): Salt raises the freezing point of ice.
(A) Both A and R are correct and R explains A
(B) Both A and R are correct but R does not explain A
(C) A is correct but R is incorrect
(D) A is incorrect but R is correct
Option c - A is correct but R is incorrect
Consider the following statements. 1. In osmosis, the solvent moves from a concentrated solution to a dilute solution. 2. In reverse osmosis, pressure is applied on the dilute solution. Which of the statements given above is/are correct?
(A) Only 1
(B) Only 2
(C) Both 1 and 2
(D) Neither 1 nor 2
Option d - Neither 1 nor 2
Soapstone (talc) is primarily made up of which compound?
(A) Manganese silicate
(B) Sodium silicate
(C) Sodium phosphate
(D) Magnesium silicate
Option d - Magnesium silicate
Limestone is chemically known as
(A) Calcium carbonate
(B) Magnesium chloride
(C) Sodium chloride
(D) Sodium sulphate
Option a - Calcium carbonate
From a chemical point of view, Plaster of Paris is
(A) Calcium sulphate
(B) Calcium carbonate
(C) Calcium oxide
(D) Calcium oxalate
Option a - Calcium sulphate
Which of the following represents the chemical formula of Plaster of Paris?
(A) CaSO₄
(B) CaSO₄·H₂O
(C) CaSO₄·½H₂O
(D) CaSO₄·2H₂O
Option c - CaSO₄·½H₂O
The form of calcium sulphate widely used by doctors, artists, and sculptors is called
(A) Quick lime
(B) Limestone
(C) Bleaching powder
(D) Plaster of Paris
Option d - Plaster of Paris
Monazite serves as an important ore of
(A) Zirconium
(B) Thorium
(C) Titanium
(D) Iron
Option b - Thorium
Mica can best be described as a material that is
(A) A good Heat conductor but a poor electrical conductor
(B) A poor conductor of both Heat and Electricity
(C) A good conductor of both Heat and Electricity
(D) A poor conductor of Heat but a good conductor of Electricity
Option a - A good Heat conductor but a poor electrical conductor
Mica is mainly used as a raw material in which industry?
(A) Iron and steel
(B) Toy manufacturing
(C) Glass and pottery
(D) Electrical
Option d - Electrical
Which of the following liquids conducts Heat most efficiently?
(A) Mercury
(B) Water
(C) Ether
(D) Benzene
Option a - Mercury
At room temperature, which of the following Metals exists in liquid form?
(A) Lead
(B) Mercury
(C) Nickel
(D) Tin
Option b - Mercury
Which metal remains liquid under normal atmospheric conditions?
(A) Lead
(B) Nickel
(C) Mercury
(D) Tin
Option c - Mercury
Mercury is preferred for use in thermometers mainly because of its
(A) High density
(B) Ability to flow uniformly
(C) Strong circulation power
(D) High specific Heat capacity
Option c - Strong circulation power
Which of the following Metals shows no reaction with water?
(A) Iron
(B) Lead
(C) Magnesium
(D) None of the above
Option d - None of the above
When steam is passed over which substance, no reaction takes place?
(A) Aluminium
(B) Copper
(C) Carbon
(D) Iron
Option a - Aluminium
Iron metal is obtained from which of the following ores?
(A) Limestone
(B) Pitchblende
(C) Monazite sand
(D) Hematite
Option d - Hematite
Which of the following substances has the greatest electrical conductivity?
(A) Diamond
(B) Silver
(C) Graphite
(D) Wood
Option b - Silver
Which mineral is chiefly used in the manufacture of aluminium?
(A) Hematite
(B) Lignite
(C) Bauxite
(D) Magnetite
Option c - Bauxite
Bauxite is an ore of which metal?
(A) Iron
(B) Copper
(C) Aluminium
(D) Silver
Option c - Aluminium
The metal obtained from bauxite is
(A) Iron
(B) Aluminium
(C) Copper
(D) Gold
Option b - Aluminium
Aluminium is commercially extracted from
(A) Pitchblende
(B) Graphite
(C) Bauxite
(D) Argentite
Option c - Bauxite
Which one of the following statements is correct?
(A) Molten sodium is used as a coolant in nuclear reactors
(B) Calcium carbonate is used as an ingredient in toothpaste
(C) Bordeaux mixture consists of sodium sulphate and lime
(D) Zinc amalgam is used for filling teeth
Option b - Calcium carbonate is used as an ingredient in toothpaste
Assertion (A): Sodium metal is kept immersed in kerosene oil. Reason (R): Sodium melts immediately when it comes in contact with air.
(A) Both A and R are correct and R correctly explains A
(B) Both A and R are correct, but R does not explain A
(C) A is correct, but R is incorrect
(D) A is incorrect, but R is correct
Option c - A is correct, but R is incorrect
Statement (A): Iron coated with zinc does not undergo rusting. Statement (R): Zinc oxidizes more readily than iron.
(A) Both A and R are correct, and R properly explains A
(B) Both A and R are correct, but R does not explain A
(C) A is correct, but R is incorrect
(D) A is incorrect, but R is correct
Option a - Both A and R are correct, and R properly explains A
Consider the following statements. 1. Brass is formed by combining copper with zinc. 2. Magnetite serves as the principal ore of aluminium. 3. Mercurius solubilis mainly contains mercury as its constituent. 4. Potassium nitrate is used in photographic processes. Which of the statements given above are correct?
(A) Only 1 and 2
(B) Only 1 and 3
(C) Only 2 and 3
(D) Only 1, 3 and 4
Option b - Only 1 and 3
Statement (A): Iron articles acquire a brown layer when exposed to air and moisture. Statement (R): This brown layer is produced due to deposition of tannin.
(A) Both A and R are correct, and R explains A
(B) Both A and R are correct, but R does not explain A
(C) A is correct, but R is incorrect
(D) A is incorrect, but R is correct
Option c - A is correct, but R is incorrect
Which of the following substances is composed entirely of carbon?
(A) Lexan
(B) Graphene
(C) Graphite
(D) Spider silk
Option b - Graphene
Which of the following is not classified as an allotrope of carbon?
(A) Diamond
(B) Graphite
(C) Carborundum
(D) Fullerenes
Option c - Carborundum
Which element is capable of forming the largest number of compounds?
(A) Hydrogen
(B) Carbon
(C) Nitrogen
(D) Oxygen
Option b - Carbon
Which of the following does not contain carbon?
(A) Diamond
(B) Graphite
(C) Coal
(D) None of these
Option d - None of these
The material commonly referred to as pencil lead is actually
(A) Graphite
(B) Charcoal
(C) Lamp black
(D) Coal
Option a - Graphite
The discovery of the third allotrope of carbon earned a Nobel Prize in Chemistry. Which of the following scientists was not part of that group?
(A) H. W. Kroto
(B) R. F. Curl
(C) R. E. Smalley
(D) Feynman
Option d - Feynman
Buckminster fullerene refers to
(A) A carbon structure made of sixty atoms arranged in a closed cage
(B) A polymer derived from fluorine
(C) A heavier isotope of carbon
(D) None of the above
Option a - A carbon structure made of sixty atoms arranged in a closed cage
Which of the following materials does not contain carbon?
(A) Diamond
(B) Graphite
(C) Coal
(D) Sand
Option d - Sand
Which of the following substances contains carbon?
(A) Lignite
(B) Tin
(C) Silver
(D) Iron
Option a - Lignite
Which variety of coal has the highest proportion of carbon?
(A) Bituminous coal
(B) Lignite
(C) Peat
(D) Anthracite
Option d - Anthracite
Maximum carbon content is present in
(A) Pig iron
(B) Wrought iron
(C) Steel
(D) Alloy steel
Option a - Pig iron
Which of the following substances is not crystalline in structure?
(A) Diamond
(B) Quartz
(C) Sulphur
(D) Graphite
Option c - Sulphur
Diamonds are weighed in carats. One carat is equal to
(A) 100 mg
(B) 200 mg
(C) 300 mg
(D) 400 mg
Option b - 200 mg
Which of the following materials is considered the strongest?
(A) German silver
(B) Brass
(C) Steel
(D) Graphene
Option d - Graphene
Which lubricant is widely used for heavy mechanical equipment?
(A) Bauxite
(B) Phosphorus
(C) Graphite
(D) Silicon oil
Option c - Graphite
From a chemical standpoint, dry ice is
(A) Solid sulphur
(B) Frozen distilled water
(C) A mixture of Salt and ice
(D) Solid carbon dioxide
Option d - Solid carbon dioxide
Which of the following non-Metals is a comparatively good conductor of Electricity?
(A) Sulphur
(B) Selenium
(C) Bromine
(D) Phosphorus
Option b - Selenium
Water gas consists of a mixture of
(A) Carbon monoxide and hydrogen
(B) Carbon monoxide and water vapour
(C) Carbon dioxide and hydrogen
(D) Carbon dioxide and water vapour
Option a - Carbon monoxide and hydrogen
Consider the following substances. Glass can be etched or scratched by 1. Diamond 2. Hydrofluoric Acid 3. Aqua regia 4. Concentrated sulphuric Acid. Which of the statements given above are correct?
(A) Only 1 and 4
(B) Only 2 and 3
(C) Only 1 and 2
(D) Only 2 and 4
Option c - Only 1 and 2
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