Score: 0 / 25
Incorrect As: 0
Q 51: The pH of milk is:
A) 7
B) 6.7
C) 6
D) 7.5
Q 52: Breaking water up by separating it hydrogen and oxygen is called?
A) Combination
B) Electrolysis
C) Displacement
D) Redox
Q 53: The water escapes from surface of water is:
A) Condensation
B) Evaporation
C) Sublimation
D) None of these
Q 54: When a gas is turned into a liquid the process is known as?
A) Sublimation
B) Condensation
C) Evaporation
D) Deposition
Q 55: What is the method used to purify water?
A) Extraction
B) Sublimation
C) Filtration
D) None of these
Q 56: The process where a solid converts directly into a gas without becoming a liquid is called?
A) Condensation
B) Melting
C) Sublimation
D) Freezing
Q 57: The process by which a substance absorbs moisture upon exposure to the atmosphere is called?
A) Deliquescence
B) Efflorescence
C) Dehydrogenation
D) Desalination
Q 58: The structural and functional unit o f the Environment:
A) Ecosystem
B) Biome
C) Biosphere
D) None of these
Q 59: The first process in a petroleum refinery is known as:
A) Reforming
B) Distillation
C) Improve Octane Number
D) None of these
Q 60: Cooking oil can be converted into vegetable ghee by the process of:
A) Oxidation
B) Distillation
C) Hydrogenation
D) Crystallization
Q 61: By which of the following process margarine is made?
A) Hydrogenation
B) Condensation
C) Fermentation
D) Etherification
Q 62: What is the name of the place where leather is tanned?
A) Distillery
B) Tannery
C) Foundry
D) Mill
Q 63: When table salt NaCl is added to water?
A) A covalent bond is broken
B) An acidic solution is formed
C) Sodium and Chlorine ions are separated
D) Sodium is attracted to the hydrogen atoms of water
Q 64: Boiling of eggs is a:
A) Physical change
B) Chemical change
C) Both A & B
D) None of these
Q 65: Fission reaction is which type of reaction:
A) Chemical
B) Analytical
C) Physical
D) None of these
Q 66: Burning of candle is which change:
A) Physical
B) Chemical
C) Thermal
D) None of these
Q 67: Which of the following is not a chemical reaction?
A) Burning of a paper
B) Conversion of water into steam
C) Digestion of food
D) Burning of coal
Q 68: When NaHCO, is heated, it produces?
A) CO2
B) CaCO3
C) Ca(OH)2
D) CaO
Q 69: Which of the following is responsible far turning Taj Mahal yellow?
A) Chlorine
B) Carbon dioxide
C) Sulphur dioxide
D) Ammonia
Q 70: The blotting paper helps absorb liquids by:
A) Viscosity
B) Capillary action
C) Surface tension
D) None of these
Q 71: Soap and detergents remove dirt from clothes due to:
A) Capillary action
B) Osmosis
C) Diffusion
D) Lowering of interfacial tension
Q 72: Solvay process is used for production of which of the following?
A) Sodium Chloride
B) Sodium Carbonate
C) Calcium Chloride
D) Calcium Carbonate
Q 73: Which process is used for conversion of hydrocarbons in gaseous state?
A) Reforming
B) Distillation
C) Cracking
D) None of these
Q 74: Which catalyst is used for separation of Oxygen and Hydrogen in water (H2O)?
A) Sodium Chloride
B) Heat
C) Electric Charge
D) Nitric Acid
Q 75: Which is more efficient at absorbing infrared radiation than CO2?
A) Fog
B) Water vapors
C) Clouds
D) Moisture
