Description : In organic compound, halogens are estimated by which method? -General Knowledge
Last Answer : answer:
Description : In organic compound, halogens are estimated by which method?
Last Answer : Carius method
Description : Why is an organic compound fused with Sodium for testing nitrogen,halogens and sulphur ?
Last Answer : On fusing with sodium metal the elements presents in an organic compounds are converted in to ionic compounds of sodium which are water soluble which can be filtered and detected by the respective tests.
Description : In organic compounds, nitrogen is estimated by – (1) Carius method (2) Victor-Meyees method (3) Liebigs method (4) Dumas' method
Last Answer : (4) Dumas' method Explanation: In Dumas' method, a known quantity of nitrogen containing organic compound is heated strongly with excess of copper oxide in an atmosphere of carbon dioxide to produce free nitrogen in addition to carbon dioxide and water.
Description : In organic compounds, nitrogen is estimated by (1) Carius method (2) Victor-Meyer’s method (3) Liebig’s method (4) Dumas’ method
Last Answer : Dumas’ method
Description : The depreciation method which reduces the value of a machine by equal amount each year during the useful life is known as a) Estimated method b) constant percentage method c) compound interest method d) straight line method
Last Answer : d) straight line method
Description : The reactivity of compound `Z` with different halogens under appropriate conditions is gives below- The observed pattern of electrophilic substitution
Last Answer : The reactivity of compound `Z` with different halogens under appropriate conditions is gives below- ... the electronic effect of the tert-butyl group
Description : Consider a compound `CsXY_2` where X and Y are halogens. Which of the following statements is /are correct ? (i)X and Y have different oxidation state
Last Answer : Consider a compound `CsXY_2` where X and Y are halogens. Which of the following statements is /are correct ? (i)X ... ) C. Only (ii) D. (i) and (iii)
Description : By which Carbon and hydrogen are estimated in organic compounds? -Do You Know?
Last Answer : The percentages of carbon and hydrogen in the compound are calculated from the masses of carbon dioxide and water. Estimation of carbon and hydrogen in an organic compound is based on their conversion to CO, and H20 respectively
Description : By which Carbon and hydrogen are estimated in organic compounds?
Last Answer : Liebig’s method
Last Answer : Liebig's method
Description : Which scientific method is used for the production/extraction of Halogens?
Last Answer : Messenger method
Description : By which method is the age of most ancient geological formations estimated? -General Knowledge
Last Answer : The answer is 'C4 method'
Description : For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia acid absorbed in 60 mL of `M/10`
Last Answer : For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia ... ` B. `10%` C. `3%` D. `5%`
Description : In Dumas’ method for estimation of nitrogen, 0.3g of an organic compound gave 50mL of nitrogen collected at 300K temperature and 715mm pressure. Calculate the percentage composition of nitrogen in the compound. (Aqueous tension at 300K=15 mm).
Last Answer : Volume of nitrogen collected at 300K and 715mm pressure is 50 mL Actual pressure = 715-15 =700 mm Volume of Nitrogen at STP=273*700*50/300*760 =41.9 ml 22400 ml of Nitrogen at STP weighs = 28 g 41.9 ml of Nitrogen weighs = 28*41.9/22400 g % of Nitrogen = 28*41.9*100/22400*0.3 = 17.45 %
Description : In an estimation of sulphur by carius method 0.468 g of an organic compound gave 0.668 g of barium sulphate. Find the percentage of sulphur in the compound.
Last Answer : Mass of the compound = 0.468 g Mass of the barium sulphate = 0.668 g % of sulphur = 32 X Mass of barium sulphate X 100/ 233 X Mass of the compound = 32 x 0.668x100/ 233 x0.468 = 19.60 %
Description : What is the principle of Dumas method for the estimation of N in the organic compound?
Last Answer : In Dumas method , Nitrogen present in organic compound on heating with CuO release free nitrogen gas ,which collected by the downword displacement of KOH. From the voiume of nitrogen gas collected at STP, Nitrogen could be estimated.
Description : A machine is purchased for Rs. 10,000,00 and has an estimated life of 10 years. The salvage value at the end of 10 years is Rs. 1,50,000. The book value of the machine at the end of 5 years using general straight line method ... Rs. 4,75,000 (B) Rs. 5,75,000 (C) Rs. 6,50,000 (D) Rs. 8,50,000
Last Answer : (B) Rs. 5,75,000
Description : An excavator costs Rs. 20,00,000 and has an estimated life of 8 years. It has no salvage value at the end of 8 years. The book value of the excavator at the end of 3 years using general double declining balance method is (A) Rs. 8,43,750 (B) Rs. 8,75,000 (C) Rs. 10,50,000 (D) Rs. 11,56,250
Last Answer : (A) Rs. 8,43,750
Description : 1. By which method is the age of most ancient geological formations estimated? 2. Which tax is levied by the Union and collected and appropriated by the States? 3. Ban-Ki-Moon the Secretary general of ... of the World's Pressure Belts? 20. Who is considered to be the father of Ayurveda ?
Last Answer : Answer : 1. C4 method 2. Stamp Duties 3. South Korea 4. Stratosphere 5. Malia 6. Nitrates 7. Lord Ripon 8. Decrease 9. Water Vapour 10. Devabhuti 11. Kamla Kant 12. Tax on entertainment ... 14. Coniferous forest 15. Tamils 16. 73rd 17. Polyethylene 18. Swami Vivekananda 19. Monsoon 20. Charaka
Description : why Novelty Chemicals bought a Motor Vehicle for$110,000 on January 5, 2016. The estimated usefullife of the vehicle is ten years. The disposal valueis estimated at $10,000. Annual depreciation is onthe straight line method?
Last Answer : Novelty Chemicals bought a Motor Vehicle for$110,000 on January 5, 2016. The estimated usefullife of the vehicle is ten years. The disposal valueis estimated at $10,000. Annual ... for annualdepreciation.d) The Balance Sheet extracts for motor vehicle and itsrelated depreciation.full question
Description : By which method is the age of most ancient geological formations estimated
Last Answer : C4 method
Description : Increase in population of a rapidly growing city, may be estimated by (A) Arithmetical mean method (B) Geometrical method (C) Incremental increase method (D) Graphical comparison method
Last Answer : (B) Geometrical method
Description : A reactor having a salvage value of Rs. 10000 is estimated to have a service life of 10 years. The annual interest rate is 10%. The original cost of the reactor was Rs. 80000. The book value of the reactor after 5 years ... method will be Rs. (A) 40,096 (B) 43,196 (C) 53,196 (D) 60,196
Last Answer : D) 60,196
Description : In time-series analysis, which source of variation can be estimated by the ratio-to-trend method? a) Cyclical b) Trend c) Seasonal d) Irregular
Last Answer : c) Seasonal
Description : In agricultural sector net value added is estimated by A. Income method B. Expenditure method C. Production method D. All the three
Last Answer : C. Production method
Description : The method which depreciates the tractor or machine to zero at the end of its expected life is known as: A. Estimated value B. Sum-of-the digits C. Declining balance D. Straight line
Last Answer : D. Straight line
Description : In agricultural sector net value added is estimated by (a) Income method ; (b) Expenditure method ; (c) Production method ; (d) All the three
Last Answer : ; (c) Production method ;
Description : Which halogen's zeron number is not variable ?
Last Answer : The number of fluorine germs is not variable.
Description : Which of the following properties among halogens decreases from fluorine to iodine ?
Last Answer : Which of the following properties among halogens decreases from fluorine to iodine ? A. Eelectronegativity B. Electron ... energy D. (1) & (3) both
Description : The order of stability of halides of sulphur with different halogens is
Last Answer : The order of stability of halides of sulphur with different halogens is A. `I^(-) gt Br^(-) gt Cl^(-) gt F^(-)` ... `F^(-) gt Cl^(-) gt I^(-) Br^(-)`
Description : With respect to halogens, four statements are given below: (P) The bond dissociation energies for halogens are in the order: `I_(2) lt F_(2) lt Br_(2)
Last Answer : With respect to halogens, four statements are given below: (P) The bond dissociation energies for halogens are in ... ,III,IV C. II,III,IV D. I,III
Description : Among the following reactoin of hydrogen with halogens, the one that requires a catalyst is
Last Answer : Among the following reactoin of hydrogen with halogens, the one that requires a catalyst is A. `H_2 + F_2 to ... I_2 to 2HI` D. `H_2 + Br_2 to 2HBr`
Description : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... and C black D. `Na(CN)_2^-`
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... NaBr C. (C) NaF D. (D) Nal
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... . H_2O` D. (D) None of these
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides ... . `NaCN, NaOCN` D. `HCOONa, NH_3`
Description : `DeltaH_"vaporisation"` (KJ/mol) are given for the hydrides of halogens in the following graph. The hydride HF will correspond to
Last Answer : `DeltaH_"vaporisation"` (KJ/mol) are given for the hydrides of halogens in the following graph. The hydride HF will ... . (B)Q C. (C)R D. (D)S
Description : `F_2` reacts with `H_2O` as follows: `F_2+H_2O to H^(+) + F^(-) +O_2` Which of the following halogens shows same reaction but In opposite direction?
Last Answer : `F_2` reacts with `H_2O` as follows: `F_2+H_2O to H^(+) + F^(-) +O_2` Which of the following halogens shows ... ? A. `Br_2` B. `Cl_2` C. `I_2` D. All
Description : Correct order of boiling point of halogens is
Last Answer : Correct order of boiling point of halogens is A. `F_2 lt Cl_2 lt Br_2 lt I_2` B. `Cl gt F_2 gt Br_2 ... Br_2 gt I_2` D. `Cl_2 lt F_2 lt Br_2 lt I_2`
Description : Sodium extract is heated with concentrated `HNO_(3)` before testing for halogens because :
Last Answer : Sodium extract is heated with concentrated `HNO_(3)` before testing for halogens because : A. Ag reacts ... )` and hence do not interfere in the test.
Description : Hydrogen shows similarity with alkali metals as well as halogens.
Last Answer : Explain : Hydrogen shows similarity with alkali metals as well as halogens.
Description : What is the symbol of halogens?
Last Answer : Need answer
Description : What is the most active group of nonmetals noble gases alkaline earth halogens alkali metals?
Last Answer : The most active metals are alkali metals.The most active nonmetals are halogens.
Description : Who has the most active group of nonmetals noble gases alkaline earth halogens alkali metals?
Last Answer : Kevin
Description : Do displacement reactions only occur between halogens?
Last Answer : Also other elements can be involved.
Description : What are two symbols for halogens?
Last Answer : l,komkl
Description : Do halogens have a high or low boiling point?
Last Answer : Low