MCQs
Total Questions : 99
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Answer: Option A. -> The ammonia molecule is trigonal pyramidal in shape
AMMONIA IS A COLOURLESS GAS WITH A PUNGENT ODOUR. ITS AQUEOUS SOLUTION IS WEAKLY BASIC DUE TO THE FORMATION OF OH– IONS. THE AMMONIA MOLECULE IS TRIGONAL PYRAMIDAL IN SHAPE.
AMMONIA IS A COLOURLESS GAS WITH A PUNGENT ODOUR. ITS AQUEOUS SOLUTION IS WEAKLY BASIC DUE TO THE FORMATION OF OH– IONS. THE AMMONIA MOLECULE IS TRIGONAL PYRAMIDAL IN SHAPE.
Answer: Option A. -> mixture of CO and H₂
THE MIXTURE OF CO AND H₂ PRODUCED IS KNOWN AS WATER GAS OR SYNTHESIS GAS.
THE MIXTURE OF CO AND H₂ PRODUCED IS KNOWN AS WATER GAS OR SYNTHESIS GAS.
Answer: Option A. -> Evaporation
THE DYE FROM WATER CAN BE SEPARATED BY THE METHOD OF EVAPORATION. EVAPORATION IS USED TO SEPARATE THE VOLATILE COMPONENT (SOLVENT) FROM ITS NON-VOLATILE SOLUTE.
THE DYE FROM WATER CAN BE SEPARATED BY THE METHOD OF EVAPORATION. EVAPORATION IS USED TO SEPARATE THE VOLATILE COMPONENT (SOLVENT) FROM ITS NON-VOLATILE SOLUTE.
Answer: Option B. -> Mixture of oil and water
A SEPARATING FUNNEL CAN BE USED TO SEPARATE THE COMPONENTS OF THE MIXTURE OF IMMISCIBLE LIQUIDS. COMPONENTS IN THE MIXTURE OF OIL AND WATER CAN BE SEPARATED USING THIS METHOD.
A SEPARATING FUNNEL CAN BE USED TO SEPARATE THE COMPONENTS OF THE MIXTURE OF IMMISCIBLE LIQUIDS. COMPONENTS IN THE MIXTURE OF OIL AND WATER CAN BE SEPARATED USING THIS METHOD.
Answer: Option B. -> Table salt
THE COMPOSITION OF A MIXTURE IS VARIABLE WHEREAS IT IS FIXED FOR A COMPOUND. TABLE SALT I.E. SODIUM CHLORIDE IS A COMPOUND AND NOT A MIXTURE.
THE COMPOSITION OF A MIXTURE IS VARIABLE WHEREAS IT IS FIXED FOR A COMPOUND. TABLE SALT I.E. SODIUM CHLORIDE IS A COMPOUND AND NOT A MIXTURE.
Answer: Option A. -> Simple Distillation
SIMPLE DISTILLATION IS USED FOR THE SEPARATION OF COMPONENTS OF A MIXTURE CONTAINING TWO MISCIBLE LIQUIDS THAT BOIL WITHOUT DECOMPOSITION AND HAVE SUFFICIENT DIFFERENCE IN THEIR BOILING POINTS. EXAMPLE: ACETONE AND WATER
SIMPLE DISTILLATION IS USED FOR THE SEPARATION OF COMPONENTS OF A MIXTURE CONTAINING TWO MISCIBLE LIQUIDS THAT BOIL WITHOUT DECOMPOSITION AND HAVE SUFFICIENT DIFFERENCE IN THEIR BOILING POINTS. EXAMPLE: ACETONE AND WATER
Answer: Option D. -> All of the above
SUSPENSION IS A HETEROGENEOUS MIXTURE. THE PARTICLES OF A SUSPENSION CAN BE SEEN BY THE NAKED EYE. THE SOLUTE PARTICLES CAN BE SEPARATED FROM THE MIXTURE BY THE PROCESS OF FILTRATION.
SUSPENSION IS A HETEROGENEOUS MIXTURE. THE PARTICLES OF A SUSPENSION CAN BE SEEN BY THE NAKED EYE. THE SOLUTE PARTICLES CAN BE SEPARATED FROM THE MIXTURE BY THE PROCESS OF FILTRATION.
Answer: Option B. -> Amalgam
AMALGAM IS THE GENERAL NAME GIVEN TO AN ALLOY OF MERCURY WITH SOME OTHER METAL. IT CAN BE A SOLID, LIQUID OR A SOFT PASTE DEPENDING ON THE COMPOSITION OF THE CONSTITUENTS.
AMALGAM IS THE GENERAL NAME GIVEN TO AN ALLOY OF MERCURY WITH SOME OTHER METAL. IT CAN BE A SOLID, LIQUID OR A SOFT PASTE DEPENDING ON THE COMPOSITION OF THE CONSTITUENTS.
Answer: Option C. -> Both a and b
MANGANIN IS AN ALLOY OF COPPER, MANGANESE AND NICKEL. IT IS USED IN THE MANUFACTURE OF RESISTORS DUE TO ITS VIRTUALLY ZERO TEMPERATURE COEFFICIENT OF RESISTANCE.
MANGANIN IS AN ALLOY OF COPPER, MANGANESE AND NICKEL. IT IS USED IN THE MANUFACTURE OF RESISTORS DUE TO ITS VIRTUALLY ZERO TEMPERATURE COEFFICIENT OF RESISTANCE.
Answer: Option C. -> Zone refining
ZONE REFINING WORKS ON THE PRINCIPLE THAT IMPURITIES ARE MORE SOLUBLE IN THE MELT THAN IN THE SOLID STATE OF THE METAL. THIS METHOD IS VERY USEFUL FOR PRODUCING SEMICONDUCTORS.
ZONE REFINING WORKS ON THE PRINCIPLE THAT IMPURITIES ARE MORE SOLUBLE IN THE MELT THAN IN THE SOLID STATE OF THE METAL. THIS METHOD IS VERY USEFUL FOR PRODUCING SEMICONDUCTORS.
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