Description : Chemical name of Gammaxane is - (1) Toluene (2) Chloro benzene (3) Aniline (4) Benzene hexachloride
Last Answer : (4) Benzene hexachloride Explanation: Gammexane is an insecticide that is the gamma isomer of benzene hexachloride. It is also known as lindane. Benzene hexachloride is any of several stereoisomers of 1,2,3,4,5,6- hexachlorocyclohexane formed by the lightinduced addition of chlorine to benzene.
Description : Chemical name of Gammaxane is (1) Toluene (2) Chloro benzene (3) Aniline (4) Benzene hexachloride
Last Answer : Benzene hexachloride
Description : Aniline is prepared by (a) the reaction of benzene with ammonia (b) the reduction of nitrobenzene with Sn/HCl (c) the dehydrogenation of nitrobenzene (d) the reaction of nitrobenzene with I2/NaOH
Last Answer : the reduction of nitrobenzene with Sn/HCl
Description : Conversion of benzene diazonium chloride to chloro benzene is an example of which of the following reactions ?
Last Answer : Conversion of benzene diazonium chloride to chloro benzene is an example of which of the following ... Friedel-Crafts acylation C. Sandmeyer D. Wurtz
Description : Benzenediazonium chloride reacts with hypophosphorus acid to form : (a) Phenol (b) Benzaldehyde (c) Aniline (d) Benzene
Last Answer : Benzene
Description : The major product Y in the following sequence of reaction is: Aniline `overset((i) NaNO_(2)//HCl,273K)underset((ii)CuCN//KCN)to(X) overset((i)"DIBAL-H
Last Answer : The major product Y in the following sequence of reaction is: Aniline `overset((i) NaNO_(2)//HCl,273K)underset((ii)CuCN ... H_(2)O)to (Y)` A. B. C. D.
Description : Benzenediazonium chloride reacts with warm water to give (a) Aniline (b) Phenol (c) Benzene (d) Chlorobenzene
Last Answer : Phenol
Description : Benzamide reacts with Br2 and KOH to give (a) Benzene (b) Benzylamine (c) Aniline (d) Benzonitrile
Last Answer : Benzylamine
Description : Which of the following statements is False/Incorrect about nitrobenzene? (a) is formed by nitration of benzene at temperatures below 60°C. (b) can be further nitrated to give m-dinitrobenzene. (c) can be oxidized with KMnO4 to give benzoic acid. (d) can be reduced with Sn/HCl to give aniline.
Last Answer : can be oxidized with KMnO4 to give benzoic acid
Description : Phthalic anhydride is produced by the oxidation of (A) Naphthalene (B) Benzene (C) Toluene (D) Aniline
Last Answer : (B) Benzene
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 : Which of the following reagents is used to prepare benzenediazonium chloride from aniline? (a) NaNO2 + HCl (b) LiAlH4 (c) NH2NH2 + KOH (d) NaOH
Last Answer : NaNO2 + HCl
Description : Can the amino group, in the aniline molecule, become meta-directing in an electrophilic substitution reaction ?
Last Answer : Can the amino group, in the aniline molecule, become meta-directing in an electrophilic substitution reaction ... D. Yes, in a non-polar solvent
Description : When aniline is heated with glycerol in the presence of sulfuric acid and nitrobenzene, it gives quinoline. This reaction in called (a) Fischer synthesis (b) Skraup synthesis (c) Diazotization (d) Corey-House synthesis
Last Answer : Skraup synthesis
Description : Prepare operation process sheet and decide sequence of operation for the component shown in Figure No. 1. Assume suitable material and cutting conditions.
Last Answer : Operation Sheet with correct sequence of operations for the above given component by assuming suitable material and cutting conditions is as shown in below table;
Description : A solution of (-l)- chloro -1 phenyletane in toluene recemises slowly in the presence of a small amunt of `SbCI_(5)` due to the formation of .
Last Answer : A solution of (-l)- chloro -1 phenyletane in toluene recemises slowly in the presence of a ... free radical B. carbanion C. carbene D. carbocation
Description : A solution of `(+)`-2-chloro-2-phenyl ethane in toluene racemises slowly in the presence of small amount of `SbCl_(5)`, due to the formation of:
Last Answer : A solution of `(+)`-2-chloro-2-phenyl ethane in toluene racemises slowly in the presence of ... carbanion B. carbene C. free radical D. carbocation
Description : Statement-1 : Para chloro phenol is more acidic than para flouro phenol. Statement-2 : negative inductive Effect if flourine is greater than in chlori
Last Answer : Statement-1 : Para chloro phenol is more acidic than para flouro phenol. Statement-2 : negative ... . Statement-1 is false, Statement-2 is true
Description : Chemical name of bleaching powder is (1) Calcium chlorate (2) Calcium hypochlorite (3) Calcium chloro hypochlorite (4) Calcium bi chloride
Last Answer : (2) Calcium hypochlorite Explanation: Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
Description : The characteristic odour of garlic is due to - (1) a chloro compound (2) a sulphur compound (3) a fluorine compound (4) acetic acid
Last Answer : (2) a sulphur compound Explanation: The sulfur compounds in onions and garlic are called sulfites. These highly irritating chemicals can kill microbes and repel insects; prolonged contact with garlic will even blister the skin.
Description : The depletion of ozone layer is due to - (1) chloro fluoro carbon (2) carbon dioxide (3) sulphur dioxide (4) ethane
Last Answer : (1) chloro fluoro carbon Explanation: A chlorofluorocarbon (CFC) is an organic compound that contains only carbon, chlorine, hydrogen and fluorine, produced as a volatile derivative of methane and ... R-4104 by the Montreal Protocol because they contribute to ozone depletion in the upper atmosphere.
Description : Which one of the following is a major green gas? (1) Carbon dioxide (2) Chloro fluorocarbon (3) Carbon monoxide (4) Freon
Last Answer : (1) Carbon dioxide Explanation: A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the ... System, the atmospheres of Venus, Mars, and Titan also contain gases that cause greenhouse effects.
Description : Which one amongst the following is not a Green House gas? (1) Nitrogen (2) Carbon dioxide (3) Carbon Monoxide (4) Chloro fluoro carbons
Last Answer : (1) Nitrogen Explanation: A greenhouse has (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. The primary greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.
Description : Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E. (poly chloro tetra fluoro ethylene). It is also called (A) Polyurethane (B) Silicone rubber (C) Teflon (D) Epoxy resin
Last Answer : (C) Teflon
Description : Which of the following alloys does not contain nickel? (A) Chloro, et-2 alloy (B) Monel (C) Inconel (D) Babbitt metal
Last Answer : (D) Babbitt metal
Description : 0.3780g of organic chloro compound gave 0.5740g of silver chloride in carius estimation .Calculate the percentage of chlorine present in the compound.
Last Answer : % of chlorine = 35.5*mass of AgCl formed * 100/143.5 * mass of the substance = 35.5*0.5740*100/143.5*0.3780 = 19.6 %
Description : Name an animal that contains chloro- phyll?
Last Answer : Euglena
Description : The chemical name of Bleaching powder is (A)Calcium Chloride (B) Calcium Chloro-Oxide (C) Calcium Oxychloride (D) Hypochloride
Last Answer : (C) Calcium Oxychloride
Description : Which of the following industries discharge mercury as a pollutant? (A) Chloro-alkali industry (B) Tanneries (C) Beverage plant (D) Phosphoric acid plant
Last Answer : (A) Chloro-alkali industry
Description : Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of (A) CO2 (B) SO2 (C) Hydrocarbons (D) CFC (chloro fluoro carbon)
Last Answer : (D) CFC (chloro fluoro carbon)
Description : Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion ... rate? (A) CO (B) SO2 (C) NOx (D) CFC (chloro fluoro carbons)
Last Answer : (A) CO
Description : CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozone. (A) 10 2 (B) 10 5 (C) 10 9 (D) 10 15
Last Answer : (B) 10 5
Description : p-Nitrotoluene on treatment with chlorine in the presence of FeCl3 gives (a) m-Chlorotoluene (b) 2-Chloro-4-nitrotoluene (c) p-Chlorotoluene (d) 2-Nitro-4-chlorotoluene
Last Answer : 2-Chloro-4-nitrotoluene
Description : Which of the alkyl chlorides listed below undergoes dehydrohalogenation in the presence of a strong base to give 2-pentene as the only alkene product? (a) 1-chloropentane (b) 2-chloropentane (c) 3-chloropentane (d) 1-chloro-2-methylbutane
Last Answer : 3-chloropentane
Description : Addition of HCl to 3-methyl-1-pentene gives two products. One of these is 2-chloro-3-methylpentane. What is the other product? (a) 1-Chloro-3-methylpentane (b) 3-Chloro-3-methylpentane (c) 3-Chloro-2-methylpentane (d) 2-Chloro-2-methylpentane
Last Answer : 3-Chloro-3-methylpentane
Description : 1-Butene reacts with Cl2 in H2O to give (a) 1-Chloro-2-butanol (b) 2-Chloro-2-butanol (c) 1-Chloro-1-butanol (d) 2-Chloro-1-butanol
Last Answer : 1-Chloro-2-butanol
Description : Propene reacts with Cl2 in H2O to give (a) 1-Chloro-2-propanol (b) 2-Chloro-2-propanol (c) 1-Chloro-1-propanol (d) 2-Chloro-1-propano
Last Answer : 1-Chloro-2-propanol
Description : Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called (A) Polyurethane (B) Silicone (C) Teflon (D) Epoxy resin
Description : Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on (A) Slaked lime (B) Soda lime (C) Calcium perchlorate (D) None of these
Last Answer : (A) Slaked lime
Description : In thiazides following substituent is essential for diuretic activity : (A) Chloro group at position 6 (B) Methyl group at position 2 (C) Sulphamoyl group at position 7 (D) Hydrophobic group at position 3
Last Answer : (C) Sulphamoyl group at position 7
Description : What is the chemical name of MCPA ? a).2-(4-chloro-2 methylphenoxy acid b). 4-(4 chloro-2 methylphenoxy acid c). 4- chloro-2 –methylphenoxy acid d). 2,4-dichlorophenoxy acid
Last Answer : Deep germinating weed seeds are at depth of
Description : Chemical name of bleaching powder is : (1) Calcium chlorate (2) Calcium hypochlorite (3) Calcium chloro hypochlorite (4) Calcium bi chloride
Last Answer : Calcium hypochlorite
Last Answer : Nitrogen
Description : The depletion of ozone layer is due to (1) chloro fluoro carbon (2) carbon dioxide (3) sulphur dioxide (4) ethane
Last Answer : chloro fluoro carbon
Description : Which one of the following is a major green house gas? (1) Carbon dioxide (2) Chloro fluorocarbon (3) Carbon monoxide (4) Freon
Last Answer : Carbon dioxide
Description : Ozone-hole in the atmosphere is largely caused by the presence of (1) Oxygen (2) Hydrogen (3) Chloro-floro-carbon (4) Radio-active waste
Last Answer : Chloro-floro-carbon
Description : Aniline reacts with bromine water to form (a) Bromobenzene (b) m-Bromoaniline (c) 2,4,6-Tribromoaniline (d) o- plus p-Bromoaniline
Last Answer : 2,4,6-Tribromoaniline
Description : Which of the following statements is correct about aniline? (a) is weak acid. (b) diazotizes to benzenediazonium chloride when treated with ice-cold nitrous acid. (c) can be nitrated with ... p-nitroaniline. (d) gives an intense green color with a suspension of bleaching powder in water
Last Answer : diazotizes to benzenediazonium chloride when treated with ice-cold nitrous acid.
Description : Coupling reaction takes place when benzene diazonium chloride is treated with :
Last Answer : Coupling reaction takes place when benzene diazonium chloride is treated with : A. Benzaldehyde B. `alpha`-naphthol C. N, N-dimethyl aniline D. Phenol