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 : 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 : 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 : How many carbon atoms are there in one naphthalene molecule? w) 6 x) 8 y) 10 z) 15
Last Answer : ANSWER: Y -- 10
Description : Carbon atoms link together with other carbon atoms in all of the following ways EXCEPT w) networks x) chains y) ionic bonds z) rings
Last Answer : ANSWER: Y -- IONIC BONDS
Description : How many carbon atoms are there in one napthalene molecule? w) 6 x) 8 y) 10 z) 15
Description : Hydrocarbons that contain a triple bond between carbon atoms are known as: w) alkenes x) alkanes y) alkynes z) polymers
Last Answer : ANSWER: Y -- ALKYNES
Description : The triple bond between the carbon atoms causes acetylene, C2H2, to have which of the following shapes? w) trigonal planar (pron: try-gon-al) x) linear y) tetrahedral z) trigonal bipyramidal
Last Answer : ANSWER: X -- LINEAR
Description : Which of the following contain sp2 hybridized carbon atoms? w) alkanes x) alkenes y) alkynes z) cycloalkanes
Last Answer : ANSWER: X -- ALKENES
Description : The configurations of the carbon atoms `C_(2)` and `C_(3)` in the following compound respectively
Last Answer : The configurations of the carbon atoms `C_(2)` and `C_(3)` in the following compound respectively A. R, R B. S, S C. R, S D. S, R
Description : A compound which contains two ring structures havi one common carbon atom is known as a: w) spiro-compound x) nonpolar compound y) interstitial compound z) inner compound
Last Answer : ANSWER: W -- SPIRO-COMPOUND
Description : There are three alcohols x, y, z which have 2, 1 and 0 alpha hydrogen atoms(s) respectively. Which does not give Lucas Test immediately
Last Answer : There are three alcohols x, y, z which have 2, 1 and 0 alpha hydrogen atoms(s) respectively. Which does ... y C. z D. all the three do not give test
Description : The compound which has maximum number of chiral centres is
Last Answer : The compound which has maximum number of chiral centres is A. B. C. D.
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 : Most of the new atoms formed when atoms in a nuclear reactor capture neutrons without fissioning are: w) fission products x) activation products y) actinides z) lead isotopes
Last Answer : ANSWER: Y -- ACTINIDES
Description : In a breeder reactor, new fuel is formed as non-fuel uranium-238 absorbs a neutron and ultimately becomes which of the following fissionable atoms: w) uranium-235 x) plutonium-239 y) uranium-239 z) neptunium-239
Last Answer : ANSWER: X -- PLUTONIUM-239
Description : How many atoms per unit cell are in a face-centered-cubic crystal? w) two x) four y) six z) eight
Last Answer : ANSWER: X -- FOUR
Description : If two atoms exert equal attractions for electrons, they can form: w) a nonpolar covalent bond x) an ionic bond y) a polar covalent bond z) no bond
Last Answer : ANSWER: W -- A NONPOLAR COVALENT BOND
Description : The nuclei of heavy atoms generally contain: w) more electrons than neutrons x) more protons than electrons y) more neutrons than electrons z) more orbitals than electrons
Last Answer : ANSWER: Y -- MORE NEUTRONS THAN ELECTRONS
Description : What is a typical spacing between atoms in a crystal, e.g., copper or rock salt? w) 0.1 Angstroms x) 2 Angstroms y) 20 Angstroms z) 100 Angstroms
Last Answer : ANSWER: B -- 2 ANGSTROMS
Description : Molecular oxygen is said to be paramagnetic. This indicates that molecular oxygen: w) is a gas at room temperature x) forms molecules containing two oxygen atoms y) has an approximate molecular weight of 32 z) has unpaired electrons
Last Answer : ANSWER: Z -- HAS UNPAIRED ELECTRONS
Description : The bond most likely to be formed when two atoms differ SOMEWHAT in their tendency to attract electrons is: w) nonpolar ionic x) polar ionic y) polar covalent z) nonpolar covalent
Last Answer : ANSWER: Y -- POLAR COVALENT
Description : In 2-butene, which of the following bonds prevents the atoms at each end of the bond from rotating with respect to each other. Is it an: w) ionic bond x) sigma bond y) strong bond z) double bond
Last Answer : ANSWER: Z -- DOUBLE BOND
Description : Which of the following pairs of numbers best represents the diameter, in nanometers, of most atoms? w) between 0.1 and 0.5 x) between 1 and 10 y) between 10 and 100 z) between 10,000 and 1,000,000
Last Answer : ANSWER: A -- BETWEEN 0.1 AND 0.5
Description : Which of the following atoms or ions would be the smallest? w) sodium atom x) magnesium atom y) singly charged sodium ion z) doubly charged magnesium ion
Last Answer : ANSWER: Z -- DOUBLY CHARGED MAGNESIUM ION
Description : Which of the following inert gas atoms is the heaviest? w) xenon x) neon y) radon z) krypton
Last Answer : ANSWER: Y -- RADON
Description : How many neighboring atoms are in contact with eac atom in a monatomic body-centered cubic structure. w) 4 x) 6 y) 8 z) 12
Last Answer : ANSWER: Y -- 8
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 : Solids may be considered to be either crystalline noncrystalline. The basic difference between them is that a crystal, in contrast to a noncrystal: w) has a sharp melting point x) has an irregular array of atoms y) exhibits double refraction z) has a completely regular atomic or molecular structure
Last Answer : ANSWER: Z -- HAS A COMPLETELY REGULAR ATOMIC OR MOLECULAR STRUCTURE
Description : How many atoms of oxygen are in a glucose molecule w) 2 x) 6 y) 10 z) 12
Last Answer : ANSWER: X -- 6
Description : In the common dry cell, the zinc atoms are: w) reduced at the cathode x) oxidized at the cathode y) oxidized at the anode z) reduced at the anode
Last Answer : ANSWER: Y -- OXIDIZED AT THE ANODE
Description : Which one of the following atoms has two unpaired electrons in its ground state: w) Sodium x) Calcium y) Oxygen z) Aluminum
Last Answer : ANSWER: Y -- OXYGEN
Description : The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell
Last Answer : ANSWER: X -- ONLY WEAK VAN DER WAALS FORCES HOLD THE ATOMS TOGETHER
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 : 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 : Enrichment of uranium by gaseous diffusion relies on the fact that uranium-235 diffuses through holes in the barriers more readily than uranium-238 does because uranium-235 is: w) a different chemical ... x) a different wavelength. y) resistant to magnetism. z) slightly lighter than uranium-238.
Last Answer : ANSWER: Z -- SLIGHTLY LIGHTER THAN URANIUM-238.
Description : Which of the following elements is found in the earth's crust as both a native element and as a compound? w) argon x) copper y) chlorine z) silicon
Last Answer : ANSWER: X -- COPPER
Description : The compound which would have the greatest molar effect on the colligative properties of a dilute solution would be: w) CaCl2 x) NaCl y) C6H12O6 z) Benzene
Last Answer : ANSWER: W -- CaCl2
Description : Which compound is responsible for the rotten egg smell? w) sulfuric acid x) putrescine y) hydrogen sulfide z) sulfur dioxide
Last Answer : ANSWER: Y -- HYDROGEN SULFIDE (NOTE: putrescine is a real compounz)
Description : Which of the following organic compounds is known as a saturated chain hydrocarbon ? w) an aromatic compound x) an alkene y) an alkyne z) an alkane
Last Answer : ANSWER: Z -- AN ALKANE
Description : Sodium chloride is an example of what kind of compound? w) ionic x) covalent y) polyatomic z) monatomic
Last Answer : ANSWER: W -- IONIC
Description : A compound which is an electron pair donor is generally classified as a: w) Lewis acid x) Bronsted base y) Bronsted acid z) Lewis base
Last Answer : ANSWER: Z -- LEWIS BASE
Description : Which compound is a monosaccharide? w) maltose x) sucrose y) glucose z) glycogen
Last Answer : ANSWER: Y -- GLUCOSE
Description : The first organic compound synthesized in 1828 by Frederich Wohler was: w) benzene x) urea y) estrogen z) methane
Last Answer : ANSWER: X -- UREA
Description : An alcohol is related to an ester as a hydroxide compound is related to: w) an acid x) a ketone y) an ether z) a salt
Last Answer : ANSWER: Z -- A SALT