Description : Which one of the following is used for dating very old objects of archaeological importance? (1) Phosphorus-31 (2) Tritium (3) Radium (4) Carbon-14
Last Answer : (4) Carbon-14 Explanation: Radiocarbon dating (usually referred to as simply carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 (140 to estimate the age ... (fraction) of 14C declines at a fixed exponential rate due to the radioactive decay of14C.
Description : What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ? (1) Radium dating (2) Uranium dating (3) Carbon dating (4) Deuterium dating
Last Answer : Carbon dating
Description : (A) The archaeological studies are based on the radioactive decay of carbon-14 isotope. (R ) The ratio of C-14 to C-12 in the animals of plants is the
Last Answer : (A) The archaeological studies are based on the radioactive decay of carbon-14 isotope. (R ) The ratio of C ... D. If both (A) and (R ) are incorrect.
Description : Can a silicon nucleus `(._(14)^(31)Si)` transfrom into a phosphorus nucleus `(._(15)^(31)P)` ? What particle would be emitted in the process ? What is
Last Answer : Can a silicon nucleus `(._(14)^(31)Si)` transfrom into a phosphorus nucleus `(._(15)^(31)P)` ? What ... = 30.97535 am u, m_(p) = 30.97376 am u`
Description : When is carbon-14 dating impractical?
Last Answer : Carbon 14 dating is only useful up to about 60,000 years because of the half-life of C-14. For example it’s useful for archeological sites. It’s not useful for dating dinosaurs.
Description : How old is a bottle of wine if the tritium activity is 25 counts/hr and new wine has an activity 200 counts/hr The half life if tritium is 12.3 years.?
Last Answer : I don’t understand the question
Description : In radiocarbon dating the carbon -14 levels in the object being dated are compared with?
Last Answer : In radiocarbon dating, the carbon-14 levels in the object beingdated are compared with _____.
Description : In radiocarbon dating the carbon-14 levels in the object being dated are compared with .?
Description : Carbon-14 dating is based on the decay of 14C to 14N. What type of radioactive decay is associated with this nuclear reaction?
Last Answer : ANSWER: b-RAY or b DECAY or ELECTRON EMISSION
Description : Air quality depicting PM- 2.5 is more hazardous to – (1) Archaeological. Monuments (2) National Parks (3) Botanical Gardens (4) Old Men and Women
Last Answer : (4) Old Men and Women Explanation: Fine particles known as PM-10 and PM-2.5 can penetrate deep into the lungs, creating health problems. People with heart or lung diseases, ... pollution. Short-term exposure to PM among pregnant women has been associated with prematurity and growth retardation.
Description : Air quality depicting PM- 2.5 is more hazardous to (1) Archaeological Monuments (2) National Parks (3) Botanical Gardens (4) Old Men and Women
Last Answer : Old Men and Women
Description : Heavy water is – (1) Deuterium (2) Rain water (3) Tritium oxide (4) Deuterium oxide
Last Answer : (4) Deuterium oxide Explanation: Heavy water is deuterium oxide (2H2O). It is a form of water that contains a larger than normal amount of the hydrogen isotope deuterium (2H or D, also known as heavy ... 1 isotope (1H or H, also called protium) that makes up most of the hydrogen in normal water.
Description : Heavy water is (1) Deuterium (2) Rain water (3) Tritium oxide (4) Deuterium oxide
Last Answer : Deuterium oxide
Description : The lightest radioactive element is (1) deuterium (2) polonium (3) tritium (4) uranium
Last Answer : tritium
Description : Which of the following elements is not present abundantly in earth’s crust ? A. Silicon B. Radium (Answer) C. Aluminum D. Carbon
Last Answer : B. Radium (Answer)
Description : Why is radium very costly?
Last Answer : It is found in very small quantity
Description : What are benefits of using uranium in dating the age of objects?
Last Answer : It is applicable to dating geological samples old from 104 to2.106 years.
Description : (3) They are not easily combustible Explanation: Typical organic compounds are combustible by nature as they contain carbon. Organic compounds mostly consist of carbon, hydrogen, halogen, and phosphorus.
Last Answer : Which of the process is known as nitrification? (1) Reaction of Nitrogen Monoxide with oxygen to form nitric acid (2) Reaction of nitrogen dioxide with water to form nitric acid (3) Conversion of ammonia to nitrites (4) Conversion of nitrite to nitric oxide
Description : Acid rain is caused due to pollution of atmosphere by – (1) oxides of carbon and nitrogen (2) oxides of nitrogen and sulphur (3) oxides of nitrogen and phosphorus (4) None of these
Last Answer : (2) oxides of nitrogen and sulphur Explanation: Acid rain is caused by emissions of Sulpfur Dioxide (SO2) and Nitrogen Oxide (NOx), which react with the water molecules in the atmosphere to produce acids.
Description : In vulcanization, natural rubber is heated with- (1) Carbon (2) Sulphur (3) Silicon (4) Phosphorus
Last Answer : (2) Sulphur Explanation: Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur, which results in three-dimensional crosslinking of the chain rubber molecules (polyisoprene) bonded to each other by sulfur atoms.
Description : Which of the following is used in making smoke bombs? (1) Sulphur (2) Phosphorus (3) Hydrogen (4) Carbon
Last Answer : (4) Carbon Explanation: A smoke bomb is a firework designed to produce smoke upon ignition. Smoke bombs are useful to military units, airsoft games, paintball games, self-defense and pranks. The ... -style fireworks and later modified the formula to produce more smoke for a longer period of time.
Description : Which of the following groups of elements have an OUTER ELECTRONIC configuration of S-2-P-2? w) halogens x) Nitrogen-Phosphorus Group y) Carbon-Silicon Group z) Boron-Aluminum Group
Last Answer : ANSWER: Y -- CARBON-SILICON GROUP
Description : Which one of the following molecules exhibits resonance? w) Carbon Tetrachloride x) Carbonate ion y) Sulfur Dichloride z) Phosphorus Tribromide
Last Answer : ANSWER: X -- CARBONATE ION
Description : Vulcanization of rubber is carried out by adding (1) Sulphur (2) Carbon (3) Ozone (4) Phosphorus
Last Answer : Sulphur
Last Answer : Carbon
Description : On large scale, tritium is produced by which of the following nuclear reaction?
Last Answer : On large scale, tritium is produced by which of the following nuclear reaction? A. `._(3)^(6)Li + ._(0)^(1 ... )^(1)H to ._(1)^(3)T` + other fragments
Description : The radioisotope , tritium `(""_(1)^(3)H)` has a half-life of 12.3 years. If the initial amount of tritium is 32 mg , how many milligrams of it would
Last Answer : The radioisotope , tritium `(""_(1)^(3)H)` has a half-life of 12.3 years. If the initial amount of tritium is 32 ... A. 1 mg B. 2 mg C. 4 mg D. 8 mg
Description : The source of enormous energy of sun is a)Fusion of hydrogen to form helium b)Fission of uranium c)Fusion of deuterium and tritium d)Fusion to tritium
Last Answer : The source of enormous energy of sun is a)Fusion of hydrogen to form helium b)Fission of uranium ... and tritium D. fission of tritium to form helium
Description : How would you expect the tritium to get to the ocean?
Last Answer : By entering an open watershed
Description : Tritium is an isotope of
Last Answer : Hydrogen
Description : Nucleus of tritium has __________ neutrons. (A) 1 (B) 2 (C) 3 (D) 5
Last Answer : (B) 2
Description : Commercial power generation from fusion reactor is not yet possible, because (A) It is difficult to control nuclear fusion reaction (B) The fuel required (i.e., deuterium & tritium) is ... to initiate fusion reaction (D) Quantity of fuel required for initiating fusion reaction is prohibitively high
Last Answer : (A) It is difficult to control nuclear fusion reaction
Description : Which one is radioactive in nature? (A) Helium (B) Deuterium (C) Heavy hydrogen (D) Tritium
Last Answer : (D) Tritium
Description : Commercial power generation from fusion reactor is not yet possible, because (A) It is difficult to control fusion reaction (B) The fuel required (e.g. deuterium and tritium) is scarce ... to initiate fusion reaction (D) Quantity of fuel required for initiating fusion reaction is prohibitively high
Last Answer : (A) It is difficult to control fusion reaction
Description : Both tritium and deuterium have the same number of (A) Neutrons (B) Electrons (C) Protons (D) Nucleons
Last Answer : (A) Neutrons
Description : Which one is the radioactive isotope of hydrogen? (A) Deuterium (B) Ortho-hydrogen (C) Tritium (D) None of these
Last Answer : (C) Tritium
Description : The decay product of tritium (a beta emitter) is (A) Lithium (B) Helium (C) Deuterium (D) Hydrogen
Last Answer : (B) Helium
Description : Which of the following is a fuel for a fusion reactor (thermonuclear reactor)? (A) Deuterium and tritium (B) U-233 (C) Thorium (D) Heavy water
Last Answer : (A) Deuterium and tritium
Description : Hydrogen bomb employs the nuclear fusion of (A) Hydrogen (B) Deuterium (C) Tritium (D) Helium
Last Answer : (B) Deuterium
Description : What precautions should be taken while working in high tritium areas?
Last Answer : Use respirators, plastic suits, VP suits if concentration of tritium is very high. Avoid getting hurt while working because tritium may go through the skin by sweat to the blood. If by chance there is tritium intake in the body drink lots of fluids.
Description : The half life of tritium is about: w) 3,500 years x) 40 years y) 12.3 years z) 3.7 years
Last Answer : ANSWER: Y -- 12.3 YEARS
Description : What will be our archaeological legacy?
Last Answer : In the United States? Stadiums.
Description : Which of the following do you think is best documented in the archaeological record: (a) gathering, (b) tool making and (c) use of fire? -History
Last Answer : Tool making is documented in the archaeological record.
Description : Discuss the arguments advanced in favor of the regional continuity model of human origins. Do you think it provides a convincing explanation of the archaeological evidence? Give reasons for your answer. -History
Last Answer : According to the Regional Continuity Model, the Homo sapiens evolved in different regions at different rates into modern humans. So there was a variation in the first appearance of ... regions. The Regional Continuity Model does not give a convincing explanation of the archaeological evidence.
Last Answer : those Objects Or Material From We Special Time , space Or Person About Different Kind of Historical Information Pie , she Objects Or The material Archaeological Patterns.
Last Answer : Inscription Called Archaeological Material From King Ashoka, His Feats About The idea Found Goes
Description : The archaeological evidence shows that ___________ was a centre of mass production of pottery.
Last Answer : The archaeological evidence shows that ___________ was a centre of mass production of pottery. (a) Gilund (b) Khethri (c) Balathal (d) Baras
Description : First Director-General of the Archaeological Survey of India.
Last Answer : 1. First Director-General of the Archaeological Survey of India. 2. Discovery of Harappa.
Description : Archaeological sites:
Last Answer : Find the odd one out: Archaeological sites: (a) Gilgal (b) Inamgaon (c) Aurangabad (d) Lahuradeva
Description : What is information sharing in archaeological?
Last Answer : Feel Free to Answer