Description : What are the limitations of Dobereiner’s law of triads?
Last Answer : Dobereiner’s classification was not satisfactory, as he failed to arrange all of the then known elements in the form of triads. He could identify only three triads from the elements known at that time
Description : Explain Dobereiner’s law of triads with an example.
Last Answer : According to Dobereiner's law of triads: When elements are arranged in the order of increasing atomic masses in groups of three elements, the atomic mass of the middle element of the triad is equal to the ... Average atomic mass = 177 2 88.5 The atomic mass of middle element Strontium = 88
Description : State Dobereiner’s law of triads.
Last Answer : According to Dobereiner’s law of triads: When elements are arranged in the order of increasing atomic masses in groups of three elements, the atomic mass of the middle element of the triad is equal to the average atomic mass of the other two elements.
Description : Iron which resembles Cobalt and Nickel in properties has been placed far away from these elements. This was one of the limitations of : (1) Modern periodic table (2) Newland's law of octaves (3) Dobereiner's triads (4) Mendeleev's periodic table
Last Answer : (2) Newland's law of octaves Explanation: Among the major limitations of Newlands Law of Octaves, some similar elements have been separated from one another while some dissimilar elements have been placed in the same column.
Description : What are Dobereiner’s triads? Give example of 2 triads.
Last Answer : Ans: he arranged the elements in several sets of 3 elements .these sets were called triads which resembled with each other in chemical properties and atomic mass of the middle element was approx the mean of the atomic masses ... 35.5 +127)/2 =81.25 (ii) Calcium (40) ,strontium(88.5) and barium (137)
Description : Lithium, sodium and potassium form a Dobereiner’s triad. The atomic masses of lithium and potassium are 7 and 39 respectively. Predict the atomic mass of sodium. -Science
Last Answer : Lithium, sodium and potassium form a Dobereiner's triad. The atomic masses of lithium and potassium are 7 and 39 respectively. Predict the atomic mass of sodium. Therefore, the atomic mass of sodium = average of the atomic mass of lithium and potassium = 23.
Description : Why was the system of classification of elements into triads not found suitable? -Science
Last Answer : it is because all the elements discovered at that time could not be classified into triads.
Description : Who Classified Elements as Triads?
Last Answer : Dobereiner
Description : What are triads?
Last Answer : Elements arranged in group of three are called triads.
Description : Why are transistors better than triads ?
Last Answer : Both triodes and transistors act as amplifiers. But due to the large size of the triode valve, there is a problem in installing it in the electronic device. This requires more energy ... and cooling system. But transistors do not have these problems. So transistors are better than triodes.
Description : What are 10 Pythagorean triads using whole numbers?
Last Answer : 3,4,5;9,40,41;6,8,10;5,12,13;30,40,50;90,120,150;10,24,26 Ithink that is 10 if not 300,400,500 and 20,48,52
Description : Describe the J. J. Thomson’s model of atom. Also state the drawback of his model. -Science
Last Answer : Thomson's atomic model failed to explain how the positive charge holds on the electrons inside the atom. It also failed to explain an atom's stability. The theory did not mention anything about the nucleus of an atom. It was unable to explain the scattering experiment of Rutherford.
Description : Michael was having dinner with his family on the occasion of Christmas. When it was the time for 0 studied concepts. dessert, Michael became curious. When he saw that the dessert was plum pudding, he ... of the model discussed here. 1 13.4 Give one drawback of the atomic model . -Science
Last Answer : 13.1 Correlation of the plum pudding with what Michael studied in his chemistry class is as follows:- In chemistry class, Michael studied the model of atom proposed by J.J. Thomson- "plum pudding ... of the atom as how a positive charge sphere can hold negatively charged electrons in an atom.
Description : What is a major drawback of the multi-party system? -SST 10th
Last Answer : The multi-party system often appears very messy and leads to political instability.
Description : Write any one major drawback of Lucknow Pact. -SST 10th
Last Answer : Since the Congress agreed to the scheme of communal electorates for Muslims, it lost its secular character.
Description : Which are the two kingdoms of organisms given by Carl Linnaeus? What was the drawback of this system?
Last Answer : Which are the two kingdoms of organisms given by Carl Linnaeus? What was the drawback of this system?
Description : What was the drawback of two kingdom system of classification?
Last Answer : What was the drawback of two kingdom system of classification?
Description : What is the drawback of a light microscope?
Last Answer : Need answer
Description : Are there any drawback to the industry such as pollution etc in Ohio?
Description : Which is a major drawback to the use of nuclear power?
Last Answer : Nuclear power creates toxic waste that must be stored forever
Description : One drawback of GPS technology is that it?
Last Answer : may infringe on peoples privacy
Description : The main drawback of the railway network in India is (a) lack of rolling stock (b) existence of single track in many areas (c) lack of coal (d) the presence of three types of gauges
Last Answer : Ans: (d)
Description : (3) Detergents give lather even with hard water Explanation: Soaps are made of materials found in nature. Detergents are synthetic a big drawback of washing with soap is that the minerals in water ... ions in hard water to create an insoluble residue that can clog drains and stick to clothing.
Last Answer : What is the objective of the 'Kyoto Protocol'? (1) To abolish child labour (2) To eliminate nuclear weapons (3) To increase ground water levels (4) To reduce greenhouse gases
Description : (3) Detergents give lather even with hard water Explanation: Soaps are made of materials found in nature. Detergents are synthetic. a big drawback of washing with soap is that the minerals in water ... ions in hard water to create an insoluble residue that can clog drains and stick to clothing.
Last Answer : Cement is usually a mixture of – (1) Calcium silicate and calcium alurninate (2) Calcium silicate and calcium ferrate (3) Calcium aluminate and calcium ferrate (4) Lime stone and silicon dioxide
Description : What is the main drawback of a single phase half bridge inverter?
Last Answer : It require a 3-wire dc supply.
Description : Which of the following technique overcomes drawback related to LOC? A. Project Planning Sheet B. Function Point Metric C. COCOMO D. COCOMO2
Last Answer : B. Function Point Metric
Description : What is the main drawback of a dual-slop ADC?
Last Answer : The dual slope ADC has long conversion time. This is the main drawback of dual slope ADC
Description : Write down the drawback of weighted D/A converter.
Last Answer : The main disadvantage of binary weighted D/A converter is the requirement of wide range of resister values.As the length of the binary word is increased .the range of resister values needed also increases.
Description : One the main drawback of this type of planning system is that it requires a lot of computational powers at each node. a) True b) False
Last Answer : a) True
Description : The main drawback of supplying more excess air in the combustion of fuel is the (A) Excessive power requirement of air blower (B) Enhanced sensible heat loss in the flue gas (C) Intermittent and uncontrolled combustion of the fuel (D) High exit flue gas temperature from the furnace
Last Answer : (B) Enhanced sensible heat loss in the flue gas
Description : . Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like (A) High cost (B) Fragile nature (C) Easy poisoning tendency (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Plastics as a material of construction suffer from the drawback of low (A) Machinability (B) Density (C) Strength (D) Plastic deformatio
Last Answer : Option C
Description : What is the drawback of an array?
Last Answer : A: Its size cannot be changed.
Description : What is a drawback to the special-purpose computer?
Last Answer : Lack of versatility.
Description : What is the drawback of static coefficients?
Last Answer : The main draw back of static coefficient is that it does not show the variation of error with time and input should be standard input.
Description : What is one drawback of increasing automation? a. The product requires increased time/expense for subsequent short-move repositioning. b. Operating second shift becomes more expensive. c. ... d. Automation slows production capability. e. It requires more employees for the production line.
Last Answer : a. The product requires increased time/expense for subsequent short-move repositioning.
Description : Export incentives taxable under this head includes a) Cash Compensatory Support b) Duty Drawback c) Profit on transfer of DPEB d) All of the above
Last Answer : d) All of the above
Description : Rated speed of an engine is the speed at which an engine devlopes (A) Maximum crankshaft torque (B) Maximum brake horse power output (C) Maximum thermal efficiency (D) Maximum drawback pull
Last Answer : (B) Maximum brake horse power output
Description : The main drawback of centrifugal pump is a)necessity of priming b) discharge from pump varies with the load of water c) For high heads efficiency is low up to 50% d) the suction lift is limited to 6 metre e) all of the above*
Last Answer : e) all of the above*
Description : The most important drawback of sucralfate in the treatment of duodenal ulcer is: A. Low ulcer healing efficacy B. Poor relief of ulcer pain C. High incidence of side effects D. Need for taking a big tablet four times a day
Last Answer : D. Need for taking a big tablet four times a day
Description : The most important drawback of radioactive iodine treatment of Grave’s disease is: A. Subsequent hypothyroidism in many patients B. Marked side effect for 1-2 weeks after treatment C. High cost D. Permanent cure cannot be achieved
Last Answer : A. Subsequent hypothyroidism in many patients
Description : Give the drawback of DFS.
Last Answer : The drawback of DFS is that it can get stuck going down the wrong path. Many problems have very deep or even infinite search tree. So dfs will never be able to recover from an unlucky choice at ... the top of the tree. So DFS should be avoided for search trees with large or infinite maximum depths
Description : List four drawback of carbureted SI Engine.
Last Answer : Drawback of Carbureted SI Engine: 1) Air-Fuel Ratio: As in SI engine Air-fuel ratio varies from 8:1 to 18.5:1 i.e. from 8 kg of air/kg of fuel to 18.5 kg of air/kg of fuel. Richer or leaner air-fuel ... from 8 kg of air/kg of fuel to 18.5 kg of air/kg of fuel. So emission is more in SI engine.
Description : Write drawback of natural rubber.
Last Answer : Drawbacks of natural rubber: 1. It has low tensile strength. 2. It is too weak to be used in heavy duty operation. 3. During summer, the raw rubber becomes soft and sticky, while ... It gets tarnished in air due to oxidation. As a result, its durability is considerably by vulcanization.
Description : Write the drawback of natural rubber. Name the method used to overcome these drawback.
Last Answer : Drawback of natural rubber: 1. It has low tensile strength. 2. It is too weak to be used in heavy duty operation. 3. During summer, the raw rubber becomes soft and sticky, ... result, its durability is considerably by vulcanization. The method used to overcome these drawbacks is Vulcanisation.
Description : Which of the following disk scheduling techniques has a drawback of starvation? (A) SCAN (B) SSTF (C) FCFS (D) LIFO
Last Answer : Which of the following disk scheduling techniques has a drawback of starvation? (A) SCAN (B) SSTF (C) FCFS (D) LIFO