MCQs
Total Questions : 99
| Page 10 of 10 pages
Answer: Option A. -> Electron – 0. 00055 amu; Proton – 1.0078 amu; Neutron – 1.0083 amu
THE CORRECT MASS OF ELECTRON IS 0. 00055 AMU; PROTON IS 1.0078 AMU AND NEUTRON IS 1.0083 AMU. KINDLY NOTE MASS OF NEUTRON IS SLIGHTLY MORE THAN THAT OF PROTON.
THE CORRECT MASS OF ELECTRON IS 0. 00055 AMU; PROTON IS 1.0078 AMU AND NEUTRON IS 1.0083 AMU. KINDLY NOTE MASS OF NEUTRON IS SLIGHTLY MORE THAN THAT OF PROTON.
Answer: Option B. -> 2,8,18,8
KRYPTON IS A CHEMICAL ELEMENT WITH SYMBOL KR AND ATOMIC NUMBER 36. IT IS A MEMBER OF GROUP 18 (NOBLE GASES) ELEMENTS. THE ELECTRONIC CONFIGURATION OF KRYPTON IS [2, 8, 18, 8]
KRYPTON IS A CHEMICAL ELEMENT WITH SYMBOL KR AND ATOMIC NUMBER 36. IT IS A MEMBER OF GROUP 18 (NOBLE GASES) ELEMENTS. THE ELECTRONIC CONFIGURATION OF KRYPTON IS [2, 8, 18, 8]
Answer: Option C. -> Carbon Dioxide
WHEN EXCESS AMOUNT OF CARBON DIOXIDE GAS IS PASSED THROUGH LIME WATER, IT TURNS LIME WATER MILKY DUE TO THE FORMATION OF CALCIUM CARBONATE (CACO3).
WHEN EXCESS AMOUNT OF CARBON DIOXIDE GAS IS PASSED THROUGH LIME WATER, IT TURNS LIME WATER MILKY DUE TO THE FORMATION OF CALCIUM CARBONATE (CACO3).
Answer: Option C. -> Copper
THE COMPOUND IS PENTAHYDRATE COPPER SULPHATE. ITS CHEMICAL FORMULA IS CUSO4. 5H2O AND IS KNOWN AS BLUE VITRIOL. IT IS BLUE CRYSTALLINE SOLID AND BECOMES DIRTY WHITE ON HEATING DUE TO THE LOSS OF WATER MOLECULES AND FINALLY BECOMES AMORPHOUS. IT REGAINS ITS COLOUR BY ABSORBING WATER FROM ATMOSPHERE AND BECOMES BLUE AGAIN.
THE COMPOUND IS PENTAHYDRATE COPPER SULPHATE. ITS CHEMICAL FORMULA IS CUSO4. 5H2O AND IS KNOWN AS BLUE VITRIOL. IT IS BLUE CRYSTALLINE SOLID AND BECOMES DIRTY WHITE ON HEATING DUE TO THE LOSS OF WATER MOLECULES AND FINALLY BECOMES AMORPHOUS. IT REGAINS ITS COLOUR BY ABSORBING WATER FROM ATMOSPHERE AND BECOMES BLUE AGAIN.
Answer: Option D. -> Iodine
EDIBLE SEAWEED PRODUCTS HAVE BEEN CONSUMED IN MANY ASIAN COUNTRIES. EDIBLE SEAWEEDS ACCUMULATE IODINE FROM SEAWATER AND ARE THEREFORE A GOOD DIETARY SOURCE OF IODINE. ADEQUATE CONSUMPTION OF SEAWEED CAN ELIMINATE IODINE DEFICIENCY DISORDERS, BUT EXCESSIVE IODINE INTAKE IS NOT GOOD FOR HEALTH. THE RECOMMENDED DIETARY REFERENCE INTAKE OF 0.15 MG/D AND 0.14 MG/D FOR IODINE HAS BEEN ESTABLISHED IN THE UNITED STATES AND TAIWAN, RESPECTIVELY. SEAWEED IS AN EXCELLENT SOURCE OF IODINE. HOWEVER, THE AMOUNT IT CONTAINS DEPENDS ON THE SPECIES. KOMBU KELP OFFERS THE HIGHEST AMOUNT OF IODINE, WITH SOME VARIETIES CONTAINING NEARLY 2,000% OF THE DAILY VALUE IN ONE GRAM. SEAWEED IS A SOURCE OF IODINE, NECESSARY FOR THYROID FUNCTION AND TO PREVENT GOITRE. HOWEVER, AN EXCESS OF IODINE IS SUSPECTED IN THE HEIGHTENED CANCER RISK IN JAPANESE WHO CONSUME A LOT OF THE PLANT, AND EVEN BIGGER RISKS IN POST-MENOPAUSAL WOMEN.
EDIBLE SEAWEED PRODUCTS HAVE BEEN CONSUMED IN MANY ASIAN COUNTRIES. EDIBLE SEAWEEDS ACCUMULATE IODINE FROM SEAWATER AND ARE THEREFORE A GOOD DIETARY SOURCE OF IODINE. ADEQUATE CONSUMPTION OF SEAWEED CAN ELIMINATE IODINE DEFICIENCY DISORDERS, BUT EXCESSIVE IODINE INTAKE IS NOT GOOD FOR HEALTH. THE RECOMMENDED DIETARY REFERENCE INTAKE OF 0.15 MG/D AND 0.14 MG/D FOR IODINE HAS BEEN ESTABLISHED IN THE UNITED STATES AND TAIWAN, RESPECTIVELY. SEAWEED IS AN EXCELLENT SOURCE OF IODINE. HOWEVER, THE AMOUNT IT CONTAINS DEPENDS ON THE SPECIES. KOMBU KELP OFFERS THE HIGHEST AMOUNT OF IODINE, WITH SOME VARIETIES CONTAINING NEARLY 2,000% OF THE DAILY VALUE IN ONE GRAM. SEAWEED IS A SOURCE OF IODINE, NECESSARY FOR THYROID FUNCTION AND TO PREVENT GOITRE. HOWEVER, AN EXCESS OF IODINE IS SUSPECTED IN THE HEIGHTENED CANCER RISK IN JAPANESE WHO CONSUME A LOT OF THE PLANT, AND EVEN BIGGER RISKS IN POST-MENOPAUSAL WOMEN.
Answer: Option D. -> 1, 2 & 3
RED VITRIOL IS COBALT SULPHATE. COPPER SULPHATE IS CALLED BLUE VITRIOL.
RED VITRIOL IS COBALT SULPHATE. COPPER SULPHATE IS CALLED BLUE VITRIOL.
Answer: Option B. -> Deuterium
99.985% OF HYDROGEN ATOMS CONTAIN ONLY ONE PROTON. THIS ISOTOPE IS CALLED PROTIUM( 1H1). REST OF THE PERCENTAGE OF HYDROGEN ATOM CONTAINS TWO OTHER ISOTOPES, THE ONE CONTAINING 1 PROTON AND 1 NEUTRON IS CALLED DEUTERIUM (1D2, 0.015%) AND THE OTHER ONE POSSESSING 1 PROTON AND 2 NEUTRONS IS CALLED TRITIUM (1T3 ). THE LATTER ISOTOPE IS FOUND IN TRACE AMOUNTS ON THE EARTH.
99.985% OF HYDROGEN ATOMS CONTAIN ONLY ONE PROTON. THIS ISOTOPE IS CALLED PROTIUM( 1H1). REST OF THE PERCENTAGE OF HYDROGEN ATOM CONTAINS TWO OTHER ISOTOPES, THE ONE CONTAINING 1 PROTON AND 1 NEUTRON IS CALLED DEUTERIUM (1D2, 0.015%) AND THE OTHER ONE POSSESSING 1 PROTON AND 2 NEUTRONS IS CALLED TRITIUM (1T3 ). THE LATTER ISOTOPE IS FOUND IN TRACE AMOUNTS ON THE EARTH.
Answer: Option D. -> Hydrogen
VANASPATI IS GENERALLY USED AS THE ALTERNATIVE TO GHEE DUE TO ITS CHEAP PRICE, VANASPATI IS VEGETABLE COOKING OIL, FULLY OR PARTIALLY HYDROGENATED. THE VANASPATI IS EITHER USED FOR COOKING FOOD OR AS THE RAW COMPOUND IN SOAP MAKING. HYDROGENATION TENDS TO INCREASE THE MELTING POINT OF THE VEGETABLE OILS (THAT HAVE VERY LOW MELTING POINTS) TO ABOUT 36 DEGREE CELSIUS THAT IS NEAR ABOUT HUMAN BODY TEMPERATURE. HENCE, THE HYDROGENATED OILS THAT NORMALLY REMAIN IN SOLID-STATE GET LIQUEFIED AT HUMAN BODY TEMPERATURE. ALL THESE PROPERTIES MAXIMIZE THE SHELF LIFE OF THE HYDROGENATED OILS AND THUS, THESE ARE WIDELY USED IN VARIED FOOD ITEMS LIKE SNACKS, BAKERY PRODUCTS, SWEETS, ETC. BASICALLY, ALL OILS HAVE BOTH UNSATURATED AS WELL AS SATURATED FATTY ACIDS. BY ADDING HYDROGEN, UNSATURATED FATS GET CONVERTED TO SATURATED FATS, DECREASING THE OVERALL IODINE VALUE. FINALLY, THE HYDROGENATED OIL GETS SOLIDIFIED AT A LOWER TEMPERATURE. THE ENTIRE PROCESS OF HYDROGENATION IS CARRIED OUT IN BATCH VESSELS UNDER PRESSURE, IN WHICH, OIL TO BE HYDROGENATED IS HEATED. THE ENTIRE HYDROGENATION PROCESS IS DONE IN THE PRESENCE OF A NICKEL CATALYST. POST HYDROGENATION, THE CATALYST IS RECOVERED FOR RE-USE THROUGH THE FILTRATION OF HYDROGENATED OIL IN PLATE AND FRAME FILTER PRESSES. THE HYDROGENATION PROCESS ENSURES NO LOSS OF OIL, AS THE HYDROGEN ADDED MAKES UP THE OIL LOSS THAT GOES WITH THE CATALYST.
VANASPATI IS GENERALLY USED AS THE ALTERNATIVE TO GHEE DUE TO ITS CHEAP PRICE, VANASPATI IS VEGETABLE COOKING OIL, FULLY OR PARTIALLY HYDROGENATED. THE VANASPATI IS EITHER USED FOR COOKING FOOD OR AS THE RAW COMPOUND IN SOAP MAKING. HYDROGENATION TENDS TO INCREASE THE MELTING POINT OF THE VEGETABLE OILS (THAT HAVE VERY LOW MELTING POINTS) TO ABOUT 36 DEGREE CELSIUS THAT IS NEAR ABOUT HUMAN BODY TEMPERATURE. HENCE, THE HYDROGENATED OILS THAT NORMALLY REMAIN IN SOLID-STATE GET LIQUEFIED AT HUMAN BODY TEMPERATURE. ALL THESE PROPERTIES MAXIMIZE THE SHELF LIFE OF THE HYDROGENATED OILS AND THUS, THESE ARE WIDELY USED IN VARIED FOOD ITEMS LIKE SNACKS, BAKERY PRODUCTS, SWEETS, ETC. BASICALLY, ALL OILS HAVE BOTH UNSATURATED AS WELL AS SATURATED FATTY ACIDS. BY ADDING HYDROGEN, UNSATURATED FATS GET CONVERTED TO SATURATED FATS, DECREASING THE OVERALL IODINE VALUE. FINALLY, THE HYDROGENATED OIL GETS SOLIDIFIED AT A LOWER TEMPERATURE. THE ENTIRE PROCESS OF HYDROGENATION IS CARRIED OUT IN BATCH VESSELS UNDER PRESSURE, IN WHICH, OIL TO BE HYDROGENATED IS HEATED. THE ENTIRE HYDROGENATION PROCESS IS DONE IN THE PRESENCE OF A NICKEL CATALYST. POST HYDROGENATION, THE CATALYST IS RECOVERED FOR RE-USE THROUGH THE FILTRATION OF HYDROGENATED OIL IN PLATE AND FRAME FILTER PRESSES. THE HYDROGENATION PROCESS ENSURES NO LOSS OF OIL, AS THE HYDROGEN ADDED MAKES UP THE OIL LOSS THAT GOES WITH THE CATALYST.
Answer: Option C. -> Protons and Neutrons
THE ATOM IS THE SMALLEST UNIT OF MATTER THAT IS COMPOSED OF THREE SUB-ATOMIC PARTICLES: THE PROTON, THE NEUTRON, AND THE ELECTRON. PROTONS AND NEUTRONS MAKE UP THE NUCLEUS OF THE ATOM, A DENSE AND POSITIVELY CHARGED CORE, WHEREAS THE NEGATIVELY CHARGED ELECTRONS CAN BE FOUND AROUND THE NUCLEUS IN AN ELECTRON CLOUD. AN ATOM CONSISTS OF A POSITIVELY CHARGED NUCLEUS SURROUNDED BY ONE OR MORE NEGATIVELY CHARGED PARTICLES CALLED ELECTRONS. THE NUMBER OF PROTONS FOUND IN THE NUCLEUS EQUALS THE NUMBER OF ELECTRONS THAT SURROUND IT, GIVING THE ATOM A NEUTRAL CHARGE (NEUTRONS HAVE ZERO CHARGES). MOST OF AN ATOM’S MASS IS IN ITS NUCLEUS; THE MASS OF AN ELECTRON IS ONLY 1/1836 THE MASS OF THE LIGHTEST NUCLEUS, THAT OF HYDROGEN. ALTHOUGH THE NUCLEUS IS HEAVY, IT IS SMALL COMPARED WITH THE OVERALL SIZE OF AN ATOM.
THE ATOM IS THE SMALLEST UNIT OF MATTER THAT IS COMPOSED OF THREE SUB-ATOMIC PARTICLES: THE PROTON, THE NEUTRON, AND THE ELECTRON. PROTONS AND NEUTRONS MAKE UP THE NUCLEUS OF THE ATOM, A DENSE AND POSITIVELY CHARGED CORE, WHEREAS THE NEGATIVELY CHARGED ELECTRONS CAN BE FOUND AROUND THE NUCLEUS IN AN ELECTRON CLOUD. AN ATOM CONSISTS OF A POSITIVELY CHARGED NUCLEUS SURROUNDED BY ONE OR MORE NEGATIVELY CHARGED PARTICLES CALLED ELECTRONS. THE NUMBER OF PROTONS FOUND IN THE NUCLEUS EQUALS THE NUMBER OF ELECTRONS THAT SURROUND IT, GIVING THE ATOM A NEUTRAL CHARGE (NEUTRONS HAVE ZERO CHARGES). MOST OF AN ATOM’S MASS IS IN ITS NUCLEUS; THE MASS OF AN ELECTRON IS ONLY 1/1836 THE MASS OF THE LIGHTEST NUCLEUS, THAT OF HYDROGEN. ALTHOUGH THE NUCLEUS IS HEAVY, IT IS SMALL COMPARED WITH THE OVERALL SIZE OF AN ATOM.
Latest Videos
Latest Test Papers
Login With Google
Old way of Login
Login With Email