MCQs
Total Questions : 99
| Page 8 of 10 pages
Answer: Option D. -> Chromium
CHROMIUM(III) SALTS ARE USED IN THE TANNING OF LEATHER. CHROMIUM IS A STEELY-GREY, LUSTROUS, HARD AND BRITTLE TRANSITION METAL WHICH IS ALSO USED AS AN ADDITIVE IN STAINLESS STEEL.
CHROMIUM(III) SALTS ARE USED IN THE TANNING OF LEATHER. CHROMIUM IS A STEELY-GREY, LUSTROUS, HARD AND BRITTLE TRANSITION METAL WHICH IS ALSO USED AS AN ADDITIVE IN STAINLESS STEEL.
Answer: Option A. -> iodine
IODINE IS THE ONLY NON-METAL WHICH IS LUSTROUS IN NATURE. ALL THE OTHER NON-METALS ARE NON-LUSTROUS IN NATURE. THIS PROPERTY OF IODINE MAKES IT UNIQUE AMONG THE NON-METALS.
IODINE IS THE ONLY NON-METAL WHICH IS LUSTROUS IN NATURE. ALL THE OTHER NON-METALS ARE NON-LUSTROUS IN NATURE. THIS PROPERTY OF IODINE MAKES IT UNIQUE AMONG THE NON-METALS.
Answer: Option C. -> Sulphur
SULPHUR IS COMMONLY USED IN FIRE-CRACKERS. NITROGEN AND PHOSPHOROUS ARE TWO OTHER NON-METALS WHICH ARE COMMONLY USED IN FIREWORKS.
SULPHUR IS COMMONLY USED IN FIRE-CRACKERS. NITROGEN AND PHOSPHOROUS ARE TWO OTHER NON-METALS WHICH ARE COMMONLY USED IN FIREWORKS.
Answer: Option C. -> Both a and b
TEMPORARY HARDNESS IS A TYPE OF WATER HARDNESS CAUSED BY THE PRESENCE OF DISSOLVED BICARBONATE MINERALS (CALCIUM BICARBONATE AND MAGNESIUM BICARBONATE).
TEMPORARY HARDNESS IS A TYPE OF WATER HARDNESS CAUSED BY THE PRESENCE OF DISSOLVED BICARBONATE MINERALS (CALCIUM BICARBONATE AND MAGNESIUM BICARBONATE).
Answer: Option A. -> ionic end
THE IONIC-END OF SOAP DISSOLVES IN WATER WHILE THE CARBON CHAIN DISSOLVES IN OIL. THE ACTION OF SOAPS AND DETERGENTS IS BASED ON THE PRESENCE OF BOTH HYDROPHOBIC AND HYDROPHILIC GROUPS IN THE MOLECULE.
THE IONIC-END OF SOAP DISSOLVES IN WATER WHILE THE CARBON CHAIN DISSOLVES IN OIL. THE ACTION OF SOAPS AND DETERGENTS IS BASED ON THE PRESENCE OF BOTH HYDROPHOBIC AND HYDROPHILIC GROUPS IN THE MOLECULE.
Answer: Option C. -> calcium bicarbonate
THE PERMANENT HARDNESS IN WATER IS DUE TO THE PRESENCE OF CALCIUM SULPHATE/CALCIUM CHLORIDE AND/OR MAGNESIUM SULPHATE/MAGNESIUM CHLORIDE IN WATER.
THE PERMANENT HARDNESS IN WATER IS DUE TO THE PRESENCE OF CALCIUM SULPHATE/CALCIUM CHLORIDE AND/OR MAGNESIUM SULPHATE/MAGNESIUM CHLORIDE IN WATER.
Answer: Option A. -> Analgesics
ANALGESICS REDUCE OR ABOLISH PAIN WITHOUT CAUSING IMPAIRMENT OF CONSCIOUSNESS, MENTAL CONFUSION, IN COORDINATION OR PARALYSIS OR SOME OTHER DISTURBANCES OF NERVOUS SYSTEM.
ANALGESICS REDUCE OR ABOLISH PAIN WITHOUT CAUSING IMPAIRMENT OF CONSCIOUSNESS, MENTAL CONFUSION, IN COORDINATION OR PARALYSIS OR SOME OTHER DISTURBANCES OF NERVOUS SYSTEM.
Answer: Option B. -> Washing soda
WASHING SODA’S CHEMICAL FORMULA IS NA₂CO₃. IT BINDS CALCIUM AND MAGNESIUM PRESENT IN THE WATER AND CREATES AN INSOLUBLE SUBSTANCE.
WASHING SODA’S CHEMICAL FORMULA IS NA₂CO₃. IT BINDS CALCIUM AND MAGNESIUM PRESENT IN THE WATER AND CREATES AN INSOLUBLE SUBSTANCE.
Answer: Option B. -> Copper
A COPPER AWL IS THE OLDEST METAL OBJECT UNEARTHED TO DATE IN THE MIDDLE EAST. THE DISCOVERY REVEALS THAT METALS WERE EXCHANGED ACROSS HUNDREDS OF MILES IN THIS REGION MORE THAN 6,000 YEARS AGO, CENTURIES EARLIER THAN PREVIOUSLY THOUGHT, RESEARCHERS SAY.
A COPPER AWL IS THE OLDEST METAL OBJECT UNEARTHED TO DATE IN THE MIDDLE EAST. THE DISCOVERY REVEALS THAT METALS WERE EXCHANGED ACROSS HUNDREDS OF MILES IN THIS REGION MORE THAN 6,000 YEARS AGO, CENTURIES EARLIER THAN PREVIOUSLY THOUGHT, RESEARCHERS SAY.
Answer: Option D. -> Water softening
WATER SOFTENING IS THE REMOVAL OF CALCIUM, MAGNESIUM, AND CERTAIN OTHER METAL CATIONS IN HARD WATER. THE RESULTING SOFT WATER REQUIRES LESS SOAP FOR THE SAME CLEANING EFFORT, AS SOAP IS NOT WASTED MOPPING UP CALCIUM IONS.
WATER SOFTENING IS THE REMOVAL OF CALCIUM, MAGNESIUM, AND CERTAIN OTHER METAL CATIONS IN HARD WATER. THE RESULTING SOFT WATER REQUIRES LESS SOAP FOR THE SAME CLEANING EFFORT, AS SOAP IS NOT WASTED MOPPING UP CALCIUM IONS.
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