Description : Which compound does not give a positive test in Lassaigne’s test for nitrogen? -Do You Know?
Last Answer : Azo benzene :- It has formula C12H10N2. It contains both carbon and nitrogen so it reacts with sodium. It leads to formation of sodium cyanide. It does not give positive lassaigne's test.
Description : Which compound does not give a positive test in Lassaigne's test for nitrogen?
Last Answer : Hydrazinc
Description : Lassaigne’s test is not shown by diazonium Salt. Why?
Last Answer : On heating diazonium Salts loses Nitrogen and could not fuse with the sodium metal therefore diazonium salt do not show Positive Lassaigne’s test for nitrogen.
Description : It is advisable to prepare Lassaignes extract in distilled water why?
Last Answer : Tap water usually contain dissolved chlorine which gives test for halogen.
Description : The compound methylamine, H3C–NH2, contains a C–N bond. In this bond, which of the following best describes the charge on the nitrogen atom? (a) slightly positive (b) uncharged (c) slightly negative (d) –1
Last Answer : slightly negative
Description : A carbonyl compound (P) which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin (Q). Ozonolysis o
Last Answer : A carbonyl compound (P) which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give ... (S) is: A. B. C. D.
Last Answer : A carbonyl compound (P) which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration ... respectively, are: A. B. C. D.
Last Answer : A carbonyl compound (P) which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give ... (P) is: A. B. C. D.
Description : A compound gives a positive Tollens' test but negative Ninhydrin test. It is (a) a protein (b) an amino acid (c) a monosaccharide (d) pyridine
Last Answer : a monosaccharide
Description : An unknown compound gave a positive Tollens' test. Treatment of the unknown with I2/NaOH gave a solid which was identified as iodoform. The unknown was? (a) Ethanal (b) Acetone (c) Propanal (d) Acetophenone
Last Answer : Ethanal
Description : The enthalpy changes of formation of the gaseous oxides of nitrogen `(N_(2)O` and `NO)` are positive because of `:`
Last Answer : The enthalpy changes of formation of the gaseous oxides of nitrogen `(N_(2)O` and `NO)` are positive ... The tendency of oxygen to form `O^(2-)`
Description : Positive nitrogen balance is seen in (A) Starvation (B) Wasting diseases (C) Growing age (D) Intestinal malabsorption
Last Answer : Answer : C
Description : A positive nitrogen balance occurs (A) In growing infant (B) Following surgery (C) In advanced cancer (D) In kwashiorkar
Last Answer : Answer : A
Description : Which Bacteria convert atmospheric nitrogen into nitrogenous compound? -General Knowledge
Last Answer : The answer is 'Nitrogen fixing bacteria'
Last Answer : answer:
Description : `CH_(3)NH_(2)+CHCl_(3)+KOH to` Nitrogen containing compound `+KCl + H_(2)O`.
Last Answer : `CH_(3)NH_(2)+CHCl_(3)+KOH to` Nitrogen containing compound `+KCl + H_(2)O`. A. `CH_(3)-C-=N` B. `CH_(3)-NH- ... -= C^(+)` D. `CH_(3)-N^(+)-=C^(-)`
Description : The nitrogen compound formed when `CaCN_(2)` reacts with steam or hot water is
Last Answer : The nitrogen compound formed when `CaCN_(2)` reacts with steam or hot water is A. `N_(2)O` B. NO C. `NO_(2)` D. `NH_(3)`
Description : The compound that does not produce nitrogen gas by the thermal decomposition is
Last Answer : The compound that does not produce nitrogen gas by the thermal decomposition is A. `NH_(4)NO_(2)` B. `(NH_(4))_(2 ... 2)` D. `(NH_(4))_(2)Cr_(2)O_(7)`
Description : The nitrogen containing compound produced in the reaction of `HNO_(3)` with `P_(4)O_(10)`
Last Answer : The nitrogen containing compound produced in the reaction of `HNO_(3)` with `P_(4)O_(10)` A. ... bond D. react with Na metal producing a brown gas
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 : What is the Process that changes nitrogen from gas into compound plants can use?
Last Answer : Need answer
Description : Is nitrogen trifluoride a covalent compound?
Last Answer : Nitrogen trifluoride is a covalent compound.
Description : What is the name of the compound formed when potassium and nitrogen are combined?
Last Answer : The chemical formula of potassium nitrate is KNO3.
Description : What is the name of the compound formed when potassium nitrogen and oxygen are combined?
Description : The compound that IS NOT responsible for acid rain is (a) nitrogen dioxide (b) nitrogen pentoxide (c) Sulphur dioxide (d) carbon monoxide
Last Answer : Ans:(d)
Description : Urea is widely used as a fertilizer because it (a) is an organic compound (b) contains very high amounts of nitrogen (c) is soluble in water (d) mixes easily with soil
Last Answer : Ans:(b)
Description : Which Bacteria convert atmospheric nitrogen into nitrogenous compound?
Last Answer : Nitrogen fixing bacteria
Description : Naphthenic acid is a/an __________ compound. (A) Sulphur (B) Nitrogen (C) Oxygen (D) None of these
Last Answer : (C) Oxygen
Description : Ethyl mercaptan is a/an __________ compound. (A) Sulphur (B) Nitrogen
Last Answer : (A) Sulphur
Description : Quinoline is a/an __________ compound. (A) Sulphur (B) Nitrogen (C) Oxygen (D) None of these
Description : Compound of Nitrogen and Hydrogen is?
Last Answer : Ammonia
Description : The nitrogen compound used as indelible ink (Voters' ink)?
Last Answer : Silver Nitrate
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 : 0.257g of organic substance was heated with conc. sulphuric acid and then distilled with excess of strong alkali .the ammonia gas evolved was absorbed in 50ml of .1M HCl which required 23.2ml of c for neutralization at the end of the process. Determine the % of nitrogen in the compound ?
Last Answer : A. Vol of 0 .1M HCl taken = 50ml Vol of .1MNaOH used for neutralization of unused acid=23.2ml Now, 23.2 ml of .1MNaOH =23.2ml of .1MHCl Vol of .1MHCl unused=23.2ml Vol of .1MHCl required ... NH3 solution contain nitrogen = 14*26.8/10*1000 Percentage of Nitrogen=14*26.8*100/10*1000*.257 =14.6%
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 : Pick out the wrong statement. (A) Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water (B) Apatite is the principal material present in ... fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound fo
Last Answer : (C) Urea is more hygroscopic than ammonium nitrate
Description : The element least likely to be found in an organic compound is (a) oxygen (b) sulfur (c) nitrogen (d) silicon
Last Answer : silicon
Description : Nitrogen is the important compound of
Last Answer : Protein
Description : Each of these are added to a mixture of aqueous solutions of iodide and `CHCl_(3)` separately. Which will give a positive test for iodine when the sol
Last Answer : Each of these are added to a mixture of aqueous solutions of iodide and `CHCl_(3)` separately. ... . NaBr solution C. Chlorine water D. Bromine water
Description : Which of the following compounds decolourise `Br_(2) - H_(2)O` and also give positive test with neutral `FeCl_(3)` :
Last Answer : Which of the following compounds decolourise `Br_(2) - H_(2)O` and also give positive test with neutral `FeCl_(3)` : A. B. C. D.
Description : Assertion : Cyclohexa -2, 4-dieneone does not give positive test for ketones Reason : Enel form of Cyclohexa-2, 4-dieneone is more stable and it under
Last Answer : Assertion : Cyclohexa -2, 4-dieneone does not give positive test for ketones Reason : Enel form of ... is false D. Assertion is false, Reason is true
Description : What is the structure of `(C_(4)H_(10)O)` which can give positive haloform test and evolves hydrogen gas with `LiAlH_(4)`
Last Answer : What is the structure of `(C_(4)H_(10)O)` which can give positive haloform test and evolves hydrogen gas ... (|)overset(CH_(3))overset(|)(C) - OH`
Description : What drug would give a positive urine test for amphetamines?
Description : Will adrenaline give a positive xanthoproteic test?
Last Answer : yes
Description : All α-amino acids give positive (A) Million’s test (B) Biurete test (C) Xanthproteic test (D) Ninhydrine test
Last Answer : Answer : D