Description : (3) prevents freezing of petrol Explanation: Ethylene glycol (IUPAC name: ethane-1,2-diol) is an organic compound widely used as an automotive antifreeze and a precursor to polymers. In its pure form, it is ... A mixture of 60% ethylene glycol and 40% water freezes at -45 degree C (- 49 degree F).
Last Answer : Rust is - (1) A mixture of Fe₂O₃ and Fe(OH) ₂ (2) A mixture of FeO and Fe(OH)₂ (3) FeO only (4) A mixture of Fe₂O₃, 3H₂O and FeO
Description : What compound results from the 1,4-addition of one equivalent of HBr to 1,3-butadiene? (a) 1-bromo-1-butene (b) 2-bromo-2-butene (c) 4-bromo-1-butene (d) 1-bromo-2-butene
Last Answer : 1-bromo-2-butene
Description : What is the number of hydrogen atoms in 90 amu of ethane?
Last Answer : The chemical formula of ethane is C2H6; 18 hydrogen atoms.
Description : What is the maximum number of atoms that a hydrogen atoms can bond with an organic compound?
Last Answer : Just one.
Description : What is the Maximum number of atoms that hydrogen atoms can bond with an organic compound?
Description : When ethanol is heated with concentrated H2SO4, a gas is produced. Which of the following compounds is formed when this gas is treated with bromine in CCl4?E2 (a) Bromomethane (b) 1,2-Dibromoethane (c) Bromoethane (d) 1,1,2,2-Tetrabromoethane
Last Answer : 1,2-Dibromoethane
Description : Which of the following statements about benzene is correct? (a) All of the carbon atoms are sp3 hybridized. (b) It has no delocalized electrons. (c) The carbon-carbon bond length is longer than that of ethane. (d) It is a planar molecule.
Last Answer : It is a planar molecule.
Description : Tetra ethyle lead (TEL) is - (1) a catalyst in burning fossil fuel (2) an antioxidant (3) areductant (4) an antiknock compound
Last Answer : (4) an antiknock compound Explanation: Tetraethyl lead was extensively used as an additive to gasoline, wherein it served as an effective antiknock agent and prevented exhaust valve and seat wear. ... needed. Typical formulations called for 1 part of prepared TEL to 1260 parts untreated gasoline.
Description : The compound to which H2 does not add is – (1) Biphenyl ethylene (2) Tetraphenyl ethylene (3) Tetra - a - naphthylethylene (4) Tetra - 9 - phenanthrylethylene
Last Answer : (2) Tetraphenyl ethylene Explanation: While H2 is not very reactive under standard conditions, it does form compounds with most elements. Millions of hydrocarbons are known, but they are not formed ... are more electronegative, such as halogens. Hydrogen forms a vast array of compounds with carbon.
Description : Tetra ethyle lead (TEL) is (1) a catalyst in burning fossil fuel (2) an antioxidant (3) a reductant (4) an antiknock compound
Last Answer : an antiknock compound
Description : The compound to which H2 does not add is (1) Biphenyl ethylene (2) Tetraphenyl ethylene (3) Tetra – a –naphthylethylene (4) Tetra –9 – phenanthrylethylene
Last Answer : Tetraphenyl ethylene
Description : An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the ... suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane
Last Answer : Benzene
Description : What the prefix tetra- indicate three atoms?
Last Answer : Feel Free to Answer
Description : Biogas majorly contains - (1) Ethane (2) Methane (3) Hydrogen (4) CO
Last Answer : (2) Methane Explanation: Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O) , hydrogen sulfide (H2S) etc.
Description : Biogas majorly contains? (1) Ethane (2) Methane (3) Hydrogen (4) CO
Last Answer : (2) Methane Explanation: Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
Description : Domestic cooking gas consists mostly of (1) methane and ethane (2) liquefied butane and isobutene (3) hydrogen and acetylene (4) ethylene and carbon monoxide
Last Answer : (2) liquefied butane and isobutene Explanation: Domestic gas is another name for Liquefied Petroleum Gas (LPG). Varieties of LPG bought and sold include mixes that are primarily propane (C3H8), primarily ... propane and butane, depending on the season - in winter more propane, in summer more butane.
Description : Domestic cooking gas consists mostly of (1) methane and ethane (2) liquified butane and isobutane (3) hydrogen and acetylene (4) ethylene and carbon monoxide
Last Answer : liquified butane and isobutane
Description : How can tri substitution of Bromine be prevented in aniline ? OR How can we prepare mono bromo aniline ?
Last Answer : Because of high reactivity of aromatic amines substitution tends to occur at o- and ppositions. Monosubstituted aniline can be prepared by protecting — NH2 group by acetylation with acetic anhydride, then carrying out substitution followed by hydrolysis of substituted amide.
Description : The reaction of 1-butene with bromine, Br2, in aqueous solution gives primarily 1-bromo-2-butanol. Identify the nucleophilic species in the reaction. (a) Br2 (b) Br– (c) H2O (d) HOBr
Last Answer : H2O
Description : 1,3-Butadiene reacts with bromine to mainly give (a) 3,4-Dibromo-1-butene (b) 4-Bromo-1-butene (c) 1,4-Dibromo-2-butene (d) 1-Bromo-2-butene
Last Answer : 1,4-Dibromo-2-butene
Description : The 1H NMR spectrum of 2-bromo-2-methylpropane will consist of? a. three quartets and a singlet b. two doublets and a singlet c. two singlets d. one singlet
Last Answer : d. one singlet
Description : An organic compound contain 69% carbon and 4.8% hydrogen, the remaining being oxygen. Calculate the masses of carbon dioxide and water produced when 0.20g of this substance is subjected to complete combustion.
Last Answer : Calculation of mass of CO2 produced: Mass of compound =0.20g %C =12 x C 69=12*mass of CO2 formed*100/44*0.2 Mass of CO2 formed =69*44*.2/12*100 = 0.506g Similarly, % H =2* mass of H2Oformed*100/18* ... compound 4.8=2* mass of H2Oformed*100/18* 0.2 Mass of H2Oformed =4.8*18*0.2/2*100 =0.0864g
Description : which isotope of hydrogen is used as a tracer in organic compound.
Last Answer : Ans: The Hydrogen has three isotopes viz H.D and T. Due to difference in masses, the rate constant of these isotopes with the same substrate are different. In other words Both D and T ... also least abundant hydrogen isotope, therefore D is used as tracer to study the mechanism of organic reaction.
Description : Which of the following is an organometallic compound? (A) Isopropyl alcohol (B) Tetra-ethyl lead (C) Zeolite (D) Cumene
Last Answer : (B) Tetra-ethyl lead
Description : The compound of Portland cement which reacts immediately with water and also sets first is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Last Answer : Answer: Option C
Description : The compound of Portland cement which contributes to the strength after two to three years is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra-calcium alumino ferrite
Last Answer : Answer: Option B
Description : Pick up the compound responsible for early strength of cement from the following: (A) Tetra-calcium alumino-ferrite (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Di-calcium silicate
Description : In the cement the compound quickest to react with water, is (A) Tri-calcium aluminate (B) Tetra-calcium alumino-ferrite (C) Tri-calcium silicate (D) Di-calcium silicate
Last Answer : Answer: Option A
Description : Marsh gas, formed from decaying organic matter and in coal mines is (a) carbon dioxide (b) methane (c) ethane (d) carbon monoxide
Last Answer : Ans:(b)
Description : A gaseous organic compound that is best known for its use in preservative solutions has the chemical formula HCHO (read: H - C - H CHEM-92; Short Answer: Give me the name and atomic number ... element is a clear, odorless gas. This element is one of the essential ingredients in the burning process.
Last Answer : ANSWER: OXYGEN ATOMIC NUMBER = 8
Description : In an organic compound of molar mass `108 gm mol^-1 C, H and N` atoms are presents in `9 : 1 : 3.5` by mass. Molecular can be
Last Answer : In an organic compound of molar mass `108 gm mol^-1 C, H and N` atoms are presents in `9 : 1 : 3.5` by mass. ... (5)H_(6)N_(3)` D. `C_(4)H_(18)N_(3)`
Description : What would be the produt formed when 1-bromo-3 chorocyclobutane reacts with two equivalents of metallic sodium in ether ? .
Last Answer : What would be the produt formed when 1-bromo-3 chorocyclobutane reacts with two equivalents of metallic sodium in ether ? . A. B. C. D.
Description : The hydrolysis of 2-bromo-3-methylbutane by `S_(N^(1))` mechanism gives meinly:
Last Answer : The hydrolysis of 2-bromo-3-methylbutane by `S_(N^(1))` mechanism gives meinly: A. 3-methyl-2- ... . 2,2-dimethyl-2-propanol D. 2-methyl-1-butanol
Description : what alkene can be made when using 2-Bromo-2-methylprane ?
Last Answer : 4
Description : How many hydrogen atoms are in one molecule of the compound C12H22O11?
Last Answer : The subscript after an element in a molecular formula is the number of atoms of that element in a molecule of the compound. So one molecule of C12H22O11 has 22 atoms of hydrogen.
Description : An organic compound ("X") is a disubstituted benzene containing 77.8% carbon and 7.4 % hydrogen. Heating an alkaline solution of "X" with chloroform g
Last Answer : An organic compound ("X") is a disubstituted benzene containing 77.8% carbon and 7.4 % hydrogen. Heating an alkaline ... "Z". "Z" is A. B. C. D.
Description : Carbon and hydrogen are normally detected by strongly heating the organic compound with
Last Answer : Carbon and hydrogen are normally detected by strongly heating the organic compound with A. FeO B. CaO C. CuO D. MnO
Description : Rate of evaporation of petrol is greater than that of water at room temperature because: A. petrol molecules do not have any hydrogen bond (Answer) B. petrol is an organic compound C. water molecules have small size D. petrol molecules have greater size
Last Answer : A. petrol molecules do not have any hydrogen bond (Answer)
Description : The Refrigerant 'FREON' is – (1) Calcium Tetra Fluoride (2) Difluoro Dichloro Methane (3) Fluorspar and Felspar (4) Hydrofluosilicic Acid
Last Answer : (2) Difluoro Dichloro Methane Explanation: Dichlorodifluorornethane (R-12), is a colourless gas, and usually sold under the brand name Freon-12, is a chlorofluorocarbon halornethane (CFC), used as a ... 1994 clue to concerns about damage to the ozone layer. It is soluble in many organic solvents.
Description : How many EDTA (lethylendiamine tetra acetic acid) molecules are required to make an octahedral complex with a Ca2+ ion.
Last Answer : EDTA is a hexadentate ligand therefore only one EDTA molecule is required to form octahedral complex.
Description : The Refrigerant ‘FREON' is (1) Calcium Tetra Fluoride (2) Difluoro Dichloro Methane (3) Fluorspar and Felspar (4) Hydrofluosilicic Acid
Last Answer : Difluoro Dichloro Methane
Description : Which of the following is not a characteristic of organic compounds? (a) They usually have low melting points. (b) They usually are only slightly soluble or insoluble in water. (c) If water ... they seldom conduct an electric current. (d) Bonds which bind the atoms together are nearly always ionic.
Last Answer : Bonds which bind the atoms together are nearly always ionic.
Description : What is the number of hydrogen atoms in an alken with three carbon atoms ?
Last Answer : Answer : The most common sign of an alkene is CnH2n + 2, where ' n' is the number of carbon atoms. Therefore the number of H– atoms in an alken with 3 carbon atoms = ( 2.3 + 2) = 8 .
Description : Heavy water is so called because it contains - (1) Heavy isotope of hydrogen (2) Heavy isotope of oxygen (3) Mole number of hydrogen atoms (4) Mole number of oxygen atoms
Last Answer : (1) Heavy isotope of hydrogen Explanation: Heavy water, formally called deuterium oxide, is a form of "water that contains a larger than normal amount of the hydrogen isotope deuterium, (also known as ... ) rather than the common hydrogen-1 isotope that makes up most of the hydrogen in normal water.
Description : Apart from tetrahedral geometry another possible geometry for CH4 is square planar with four hydrogen atoms at the corners of the square and the carbon atom at the centre.Explain why CH4 is not square planar?
Last Answer : Ans For square planar arrangement hybridization is dsp2 which is not possible with Carbon as it does not have d orbital with it
Description : Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons
Last Answer : there is delocalization of electrons
Description : The atoms in sugar are bound by what type of bond? w) ionic x) hydrogen y) covalent z) van der Waals
Last Answer : ANSWER: Y -- COVALENT
Description : The removal of two hydrogen atoms from an alcohol yie what type of chemical substance?
Last Answer : ANSWER: ALDEHYDE