Description : In the `S_(N^(1))` reaction on chiral centres there is :
Last Answer : In the `S_(N^(1))` reaction on chiral centres there is : A. `100%` racemization B. ... partial racemization C. `100%` retention D. `100%` inversion
Description : Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset(|)(Br))(C)H-underset(overset(|
Last Answer : Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset( ... (3)` A. 2 B. 3 C. 4 D. 5
Description : Number of chiral carbon atoms in the compound W, X, Y and Z respectively would be :
Last Answer : Number of chiral carbon atoms in the compound W, X, Y and Z respectively would be :
Description : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolve
Last Answer : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts ... . 1-phenylethanamine C. 1-cyclohexylethanamine D. N-ethylaniline
Description : Which of the following are chiral compound.
Last Answer : Which of the following are chiral compound.
Description : A meso compound : (a) is an achiral molecule which contains chiral carbons (b) contains a plane of symmetry or a centre of symmetry (c) is optically inactive (d) is characterized by all of the above
Last Answer : ) is characterized by all of the above
Description : The curve composed of two arcs of different radii having their centres on the opposite side of the curve, is known (A) A simple curve (B) A compound curve (C) A reverse curve (D) A vertical curve
Last Answer : (C) A reverse curve
Description : How many chiral carbon atoms does Tetrachycline A (a broad spectrum antibiotic) have ?
Last Answer : How many chiral carbon atoms does Tetrachycline A (a broad spectrum antibiotic) have ?
Description : Molecular formula of smallest ester which contain one chiral carbon is :
Last Answer : Molecular formula of smallest ester which contain one chiral carbon is : A. `C_(4)H_(8)O_(2)` B. `C_(5)H_(12)O ... )H_(12)O_(2)` D. `C_(5)H_(10)O_(2)`
Description : Among the isomers of Dimethylcyclohexanes, the chiral ones are
Last Answer : Among the isomers of Dimethylcyclohexanes, the chiral ones are A. 1, 2-trans and 1,3-cis B. 1, 2-cis and 1, ... 1, 4-tans D. 1, 2-trans and 1, 3-trans
Description : Which of the following molecule is chiral.
Last Answer : Which of the following molecule is chiral. A. B. C. D.
Description : Which of the following is/are chiral?
Last Answer : Which of the following is/are chiral? A. B. C. D.
Description : Which of the following are chiral:
Last Answer : Which of the following are chiral: A. `1, 2, 3` B. `1, 2, 4` C. `2, 3, 4` D. `1, 3, 4`
Description : Chiral molecules are :
Last Answer : Chiral molecules are : A. Superimposable on their mirro image B. Not superimposable on ... molecules D. capable of showing geometrical isomerism
Description : Which of the following are chiral molecules
Last Answer : Which of the following are chiral molecules
Description : Among the following, the chiral complex is :
Last Answer : Among the following, the chiral complex is : A. `[Cr(OX)_(3)]^(3-)` B. `cis-[PtCl_(2)(en)]` C. `cis-[ ... (3))_(4)]^(+)` D. `trans-[PtCl_(2)(en)]`
Description : A chiral `C_(5)H_(10)O` alcohol is reduced by catalytic hydrogenation to an achiral `C_(5)H_(12)O` alcohol. The original alcohol is oxidized by activa
Last Answer : A chiral `C_(5)H_(10)O` alcohol is reduced by catalytic hydrogenation to an achiral `C_(5)H_(12)O` alcohol ... -2-buten-1-ol D. 2-methyl-2-buten-1-ol
Description : All the standard amino acids except the following have one chiral ‘c’ atom: (A) Threonine, Isoleucine (B) Isoleucine, Alanine (C) Threonine, Alanine (D) Alanine, Glutamine
Last Answer : Answer : C
Description : All chiral D-sugars rotate plane-polarized light : (a) clockwise (b) counterclockwise (c) +20.0° (d) in a direction that cannot be predicted but must be determined experimentally
Last Answer : in a direction that cannot be predicted but must be determined experimentally
Description : Glycine is a unique amino acid because it (a) has no chiral carbon (b) has a sulfur containing R group (c) cannot form a peptide bond (d) is an essential amino acid
Last Answer : has no chiral carbon
Description : Which of the following compounds is never chiral? (a) 2,3-dibromobutane (b) 1,3-dibromobutane (c) 1,2-dichlorobutane (d) 1,4-dibromobutane
Last Answer : 1,4-dibromobutane
Description : Which of the following is a true statement? (a) All chiral molecules possess a plane of symmetry. (b) All achiral molecules are meso. (c) All molecules which possess a single asymmetric center of the S configuration are levorotatory. (d) A mixture of achiral compounds will be optically inactive
Last Answer : A mixture of achiral compounds will be optically inactive
Description : Plane-polarized light is affected by (a) Identical molecules (b) All polymers (c) Chiral molecules (d) All biomolecules
Last Answer : Chiral molecules
Description : Which of the statements is false regarding chiral compounds? (a) rotate the plane of polarized light (b) have cis and trans isomers (c) exist as enantiomers (d) can be detected with a polarimeter
Last Answer : have cis and trans isomers
Description : A molecule is said to be chiral (a) if it contains plane of symmetry (b) if it contains centre of symmetry (c) if it cannot be superimposed on its mirror image (d) if it can be superimposed on its mirror image
Last Answer : if it cannot be superimposed on its mirror image
Description : Ethambutol molecule has (A) two chiral centers and 3 stereoisomers (B) two chiral centers and 4 stereoisomers (C) two chiral centers and 2 stereoisomers (D) one chiral center and 2 stereoisomers
Last Answer : (B) two chiral centers and 4 stereoisomers
Description : How can separation of chiral chemicals affect the chemical and/or pharmaceutical industries?
Last Answer : This enantiomers (left or right [R] oriented) versions of the same compound can have very different properties; this development has been significant particularly in the pharmaceutical industry. For example ... By chiral separation, the most of the side effects of Seldane were avoided in Allegra.
Description : What is the name given to the non-superimposable mirror image forms of chiral compounds? w) cis-trans x) enantiomers y) functional isomers z) diasteriomers
Last Answer : ANSWER: X -- ENANTIOMERS
Description : Have you been affected by the diminishing number of book stores in your shopping centres?
Last Answer : answer:I’ve had this problem. Luckily, there are plenty of indie, standalone bookstores around here that are better anyway.
Description : Promoter (A) Initiates a chemical reaction and is a catalyst by itself (B) Alters the position of equilibrium in a reversible reaction (C) Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals (D) All (A), (B) and (C)
Last Answer : (C) Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals
Description : CNC machining centres do not include operations like a.milling b.boring c.welding d.tapping
Last Answer : c.welding
Description : A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is a.ar2 / (R2 - r2) b.107 dynes c.aR/(R2-r2) d.aR/(R - r) e.ar3 / (R3 - r3)
Last Answer : e. ar3 / (R3 - r3)
Description : Which are the two famous gold mining centres in Australia? -Geography
Last Answer : Kalgoorlie and Coolgardie.
Description : (i) Why is cement industry known as a basic industry ? (ii) Mention two major centres of cement industry in India. -Geography
Last Answer : (i) Cement is indispensable for building and construction work. So, cement industry is considered to be an important core infrastructure core industry. The per capita consumption of cement is taken as one of the ... in India are : 1. Satna / Kymore / Katni/ Durg in - Chhattisgarh (Any two).
Description : Name two centres of integrated iron and steel industry in India. -Geography
Last Answer : The integrated iron and steel industries are: (a) Tata Iron and Steel Company, Jamshedpur. (b) The Hindustan Steel Limited, Bhilai.
Description : Name two centres each in Chhattisgarh where the following are mined : -Geography
Last Answer : Two centres each in Chhattisgarh where the following mined are : (i) Iron Ore: Bailadila in Bastar district and Dali Rajhara in Durg district. (ii) Bauxite: Surguja & Raigarh.
Description : Name the leading state for sugar industry in Peninsular India. Name its two centres. -Geography
Last Answer : Maharashtra is the leading state of the sugar industry in Peninsular India. The two centers are Ahmednagar and Kolhapur The sugar industry has shifted from North India to peninsular India mainly because ... season in south is nearly 7-8 months from October and continues till May and June,
Description : With reference to mining in Chhattisgarh, name two minerals each mined from the following centres : -Geography
Last Answer : The two minerals mined from the following centers: 1. Surguja District: coal and bauxite. 2. Bastar and Durg Districts: iron ore and limestone.
Description : With which large scale industry would you identify the following manufacturing centres : -Geography
Last Answer : Large scale industry that we identify with : (i) Kanpur : Woollen industry. (ii) Rourkela : Iron and Steel plant. (iii) Pune : Electronics Industry. (iv) Mangalore : Petrochemical Industry.
Description : Name an agro-based industry based in the following industrial centres: -Geography
Last Answer : Agro based industries are : Ahmedabad—Cotton industry Mysore—Silk industry
Description : What industrial product are the following centres noted for ? -Geography
Last Answer : (i) Gurgaon—Maruti Car (ii) Perambur—The Integral Coach Factory (iii) Chittaranjan—Chittaranjan Locomotive Works.
Description : Name two important silk-waving centres in Karnataka. -Geography
Last Answer : Two important silk weaving centres in Karnataka are : (i) Bangalore, (ii) Mysore.
Description : (a) Which city is known as the electronic capital of India ? Name any two major centres of electronic products. -Geography
Last Answer : (a) Bangalore is called electronic capital of India. Two other electronic products centres are Hyderabad and Pune. (b) (i) Most of the petrochemical units are in Maharashtra or Gujrat because these ... Electricals Ltd. (BHEL)-Ranipur (Haridwar) (iii) The Hindustan Machine Tools (HMT)-Bangalore.
Description : (i) Which is the largest jute producing State in India ? Name two centres of jute industry in that State. -Geography
Last Answer : (i) West Bengal is the largest jute producing state in India. Two centres of jute industry are Kolkata and Rishra. (ii) Jute products are gunny bags and carpets.
Description : “Depending on the stee and the services available and functions rendered, urban centres and designated as town, city, -Geography
Last Answer : (i) Town (ii) City (iii) Conurbation (iv) Megalopalis (v) Million city
Description : How has enlargement of urban centres and emergence of new towns played an important role -Geography
Last Answer : (i) Urbanisation refers to development of villages and rural areas into towns with high standard of living and civic amenities. (ii) The level of urbanisation is measured in terms of percentage ... mega cities. Greater Mumbai, Kolkata, Delhi, Chennai, Bengaluru and Hyderabad are the mega cities.
Description : What are the important centres of bauxite deposits in India? -Geography
Last Answer : Bauxite is an important mineral as aluminium; an important metal in many industries. India's bauxite deposits are mainly distributed between the states of Madhya Pradesh and Chattisgarh. The main ... Chattisgarh), and the plateau region of Bilaspur - Katni (between Madhya Pradesh and Chattisgarh).