Description : Why does a H+ ion attacking a carbon-carbon double bond add to the carbon with the least number of substituents? (a) the reaction is resonance stabilized. (b) the hybrid geometry favors this ... tends to attack stable centers of negative charge. (d) a more stable carbonium ion is generated.
Last Answer : a more stable carbonium ion is generated.
Description : The compound which give the most stable carbonium ion on dehydration is
Last Answer : The compound which give the most stable carbonium ion on dehydration is A. `CH_(3) - underset(CH_(3)) ... underset(OH)underset(|)(CH)-CH_(2)CH_(3)`
Description : Electron-withdrawing groups are meta directors because : (a) the carbonium ion intermediate has a negative charge on the meta position. (b) the more stable resonance hybrid occurs with meta ... the electrophile. (d) the carbonium ion intermediate has a positive charge on the meta position
Last Answer : the more stable resonance hybrid occurs with meta attachment of the electrophile.
Description : Homolytic fission of covalent bond between carbon atoms will produce : (a) Two carbonium ions (b) Two molecules (c) Free radicals (d) Carbonium ion and carbanion
Last Answer : Free radicals
Description : What is Carbonium Ion ?
Last Answer : Organic ions with positively charged carbon atoms are called 'carbonium' ions.
Description : In the reaction of propene with HCl, H+ ion acts as the : (a) electrophile (b) carbonium ion (c) nucleophile (d) carbanion
Last Answer : electrophile
Description : Chlorine free radicals react with methane by : (a) donating their free-radical electron to methane to form chloromethane. (b) abstracting a hydrogen atom from methane, and producing ... produce chloromethane. (d) forming a carbonium ion intermediate that rapidly dissociates to form chloromethane
Last Answer : abstracting a hydrogen atom from methane, and producing HCl and a methyl radical
Description : Homolytic fission of C–C bond leads to the formation of : (a) Free radicals (b) Carbonium ions (c) Carbanions (d) None of these
Description : On adding `AgNO_(3)` solution to a solution of `[Pt(NH_(3))_(3)Cl_(3)]Cl`, the percentage of total chloride ion precipitated is
Last Answer : On adding `AgNO_(3)` solution to a solution of `[Pt(NH_(3))_(3)Cl_(3)]Cl`, the percentage of total ... ion precipitated is A. 100 B. 75 C. 50 D. 25
Description : What is the coordination number of an ion what is the coordination number of the cation (a) Na Cl structure and (b) Cs Cl structure explain the reason for this difference?
Last Answer : The coordination number is six for Na in NaCl.The coordination number is eight for Cs in CsCl. The accepted explanation is that the ionic radii of cesium and chloride are very similar.
Description : Chloride shift is (A) H ions leaving the RBC in exchange of Cl- (B) Cl– leaving the RBC in exchange of bicarbonate (C) Bicarbonate ion returns to plasma and exchanged with chloride which shifts into the cell (D) Carbonic acid to the plasma
Last Answer : Answer : C
Description : Which ion moves freely through the plasma membrane a. Na b. Cl c. k d. HCo3
Last Answer : Cl
Description : Which ion is actively transported to the outside of cell membrane a. K b. Cl c. Na d. HCo3
Last Answer : Na
Description : Which ion is found in greater concentration inside the cell a. K b. Na c. Cl d. HCO3
Last Answer : K
Description : Which ion is found in greater concentration outside the cell a. K b. Na c. Cl d. HCO3
Description : Which anthelmintic drug acts through a specific glutamate gated Cl– ion channel found only in nematodes: A. Ivermectin B. Niclosamide C. Pyrantel pamoate D. Praziquantel
Last Answer : A. Ivermectin
Description : The mechanism of dehydration of an alcohol to give an ether involves formation of : (a) Carbonium ions (b) Carbanions (c) Free radicals (d) Carbenes
Last Answer : Carbonium ions
Description : The mechanism of dehydration of an alcohol to give an alkene involves formation of : (a) Carbonium ions (b) Carbanions (c) Free radicals (d) Carbenes
Description : How many orders are correct: (a) H—F lt H-Cl lt H—Br lt H—I (Bond length) (b) H—F lt H—I ltH—Br ltH—I (Acidic strength) (C) H—I H—Br lt H—Cl ltH—F (Bo
Last Answer : How many orders are correct: (a) H-F lt H-Cl lt H-Br lt H-I (Bond length) (b) H-F lt H-I ltH- ... power) (f) H-Fgt H-Igt H-Brgt H-Cl (Boiling point)
Description : Which has the smallest bond angle `X-S-X` in the given molecules ? (X=F, Cl, Br, I)
Last Answer : Which has the smallest bond angle `X-S-X` in the given molecules ? (X=F, Cl, Br, I) A. `SOF_(2)` B. `SOC1_(2)` C. `SOBr_(2)` D. `SOI_(2)`
Description : Is P Cl a polar bond?
Last Answer : The bond P-Cl is a polar covalent bond.
Description : Is Cl and H a polar bond?
Last Answer : Need answer
Description : Which one of the following pairs of atoms would form a non-polar covalent bond? A C and O B N and O C Cl and Cl D Na and Cl E Ne and Ne
Last Answer : C Cl and Cl
Description : Name the following coordination compounds according to IUPAC system of nomenclature :(i) [Co(NH3)4 (H2O)Cl]Cl2 (ii) [CrCl2(en)2]Cl, (en = ethane – 1, 2 – diamine) -Chemistry
Last Answer : (i) [CO(NH3)4 (H2O)Cl]Cl2 Tetraammine aquachlorido cobalt (III) chloride (ii) [CrCl2(en)2]Cl Dichlorobis (ethane-1, 2-diamine) chromium (III) chloride
Description : Arrange the compounds in order of decreasing acidic strength : (I) `ClCH_(2)-CH_(2)-OH` (II) `Cl_(2)CH-CH_(2)-OH` (III) `Cl-CH_(2)-CH_(2)-CH_(2)-OH` (
Last Answer : Arrange the compounds in order of decreasing acidic strength : (I) `ClCH_(2)-CH_(2)-OH` (II) `Cl_(2)CH-CH_(2 ... IV gt III` D. `II gt I gt III gt IV`
Description : Co-ordination compounds `[Pt(NH_(3))_(3)(NCS)]` and `[Pt(NH_(3))_(2) Cl_(2)]Cl` are example of ........ Isomerism
Last Answer : Co-ordination compounds `[Pt(NH_(3))_(3)(NCS)]` and `[Pt(NH_(3))_(2) Cl_(2) ... isomerism B. linkage isomers C. optical isomerism D. hydrate isomerism
Description : How many compounds liberate `NH_(3)` on heating from the following ? (i) `(NH_(4))_(2)SO_(4) " " (ii) (NH_(4))_(2)CO_(3) " " (iii) NH_(4)Cl` (iv) `NH_
Last Answer : How many compounds liberate `NH_(3)` on heating from the following ? (i) `(NH_(4))_(2)SO_(4) " " (ii) (NH_(4)) ... 3) " " (v) (NH_(4))_(2)Cr_(2)O_(7)`
Description : What are the minimum and maximum Oxidation Number of Cl in its compounds?
Last Answer : Ans. Minimum -0, maximum- +7.
Description : From the elements: Cl, Br, F, O, Al, C, Li, Cs and Xe; choose the following: (a) The element with highest negative electron gain enthalpy. (b) The element with lowest ionization enthalpy. ( ... . (f)The element which belongs to zero group. (g) The elements which forms largest number of compounds.
Last Answer : Ans. (a). The element chlorine (Cl) has the highest negative electron gain enthalpy. (b). The element cesium (Cs) has lowest ionization enthalpy. (c). The element fluorine F has lowest atomic radius. (d ... zero group (or group 18). (g). The element carbon (C) forms the largest number of compounds.
Description : Give one example for each of the following types of inter-particle forces (a) London dispersion forces (b)Dipole-Dipole forces (c) Hydrogen bond (d) Ion-dipole forces
Last Answer : Ans. (a) noble gases. (b) between HCl molecules. (c) Between water molecules or HF molecules. (d)Between NO3- and water molecules.
Description : An aqueous solution of glycine is neutral because of the formation of : (a) Carbanion (b) Zwitterion (c) Carbonium ions (d) Free radicals
Last Answer : Zwitterion
Description : The order of stability of carbonium ions is (a) tertiary > secondary > primary (b) secondary > tertiary > primary (c) primary > secondary > tertiary (d) primary > tertiary > secondary
Last Answer : tertiary > secondary > primary
Description : What is the most stable monatomic ion formed from aluminum?
Last Answer : The only monatomic ion formed from aluminum is Al3+.
Description : Is each ion stable?
Last Answer : Feel Free to Answer
Description : Why FE3+ ion is more stable than Fe2+ ion is ?
Last Answer : Because of stable, half filled 3 d5 electronic configurations in fe3+
Description : `EDTA^(4-)` i9s ethylenediamine tetraacetate ion The total number of `N-CO-O` bond angles in `[Co(EDTA)]^(-1)` complex ion is .
Last Answer : `EDTA^(4-)` i9s ethylenediamine tetraacetate ion The total number of `N-CO-O` bond angles in `[Co(EDTA)]^(-1)` complex ion is .
Description : When a positive ion is attracted to a negative ion what’s the chemical bond called?
Last Answer : Ionic Bond
Description : When a positive ion is attracted to a negative ion what’s the chemical bond?
Description : The bond formed between the transition metal ion and ligand is ?
Last Answer : Co-ordination covalent bond Transitional metal Ions can form complex compounds by. By accepting the lone pair of electrons from ligand
Description : The N–H bond in the ammonium ion, NH4+, is formed by the overlap of what two orbitals? (a) sp3–sp3 (b) sp3–sp2 (c) sp2–sp2 (d) sp3–s
Last Answer : sp3–s
Description : In the reaction of ethylene with H2O in the presence of sulfuric acid, which one adds across the double bond first? (a) H+ (b) H. (c) HO– (d) sulfate ion
Last Answer : H+
Description : Which molecule/ion among the following cannot act as a ligand in complex compounds ?
Last Answer : Which molecule/ion among the following cannot act as a ligand in complex compounds ? A. `CH_(4)` B. `CN^(-)` C. `Br^(-)` D. `CO`
Description : What compounds can copper form with a O2 ion?
Last Answer : Copper oxides are CuO and Cu2O.
Description : Ionic compounds containing cations (+ve ion) and anions (-ve ion) are?
Last Answer : Salt
Description : Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has – (1) high bond dissociation energy (2) smaller atomic radius (3) stable half filled 2p sub level (4) high nuclear charge
Last Answer : (3) stable half filled 2p sub level Explanation: Ionization energy is a measure of the ease in which atoms lose electrons and become positive ions.
Description : For stable molecule the Value of bond order must be.... a) Negative b) Positive c) 0 d) There is no relationship between stability and bond order
Last Answer : b) Positive
Description : When radiation breaks an electron pair bond in a molecule and each fragment of the molecule gets one of the bond electrons, the molecular fragments that are formed are called: w) ions x) free radicals y) stable molecules z) gases
Last Answer : ANSWER: X -- FREE RADICALS
Description : Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has (1) high bond dissociation energy (2) smaller atomic radius (3) stable half filled 2p sub level (4) high nuclear charge
Last Answer : stable half filled 2p sub level
Description : why does boron form stable electron deficient compounds?
Last Answer : Ansboron has three electrons in its valance shell that boron show three electrons with other element and form an electron deficient compound
Description : Which of the following compounds is most stable : LiF ,LiBr,LiCl,LiI ?
Last Answer : Ans. LiF.