Description : Consider the following statements. 1. Ozone is an allotropic form of oxygen 2. Phosphorus is present in DNA and RNA 3. Halogens occur in free state in nature. 4. The compounds of chlorine are used as cooling agents. The correct statements are: (a) 1 and 4 (b) 2 and 4 (c) 3 and 4 (d) 1 and 2
Last Answer : Ans:(d)
Description : The reactivity of compound `Z` with different halogens under appropriate conditions is gives below- The observed pattern of electrophilic substitution
Last Answer : The reactivity of compound `Z` with different halogens under appropriate conditions is gives below- ... the electronic effect of the tert-butyl group
Description : Which one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B ... (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.
Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron
Description : In organic compound, halogens are estimated by which method? -General Knowledge
Last Answer : The answer is 'Carius method'
Last Answer : answer:
Description : In organic compound, halogens are estimated by which method?
Last Answer : Carius method
Description : Why is an organic compound fused with Sodium for testing nitrogen,halogens and sulphur ?
Last Answer : On fusing with sodium metal the elements presents in an organic compounds are converted in to ionic compounds of sodium which are water soluble which can be filtered and detected by the respective tests.
Description : The boiling points of the halogens increase going from F2 to I2. What type of intermolecular forces are responsible for this trend? w) permanent dipole x) hydrogen bonding y) ion-ion attraction z) London dispersion forces
Last Answer : ANSWER: Z -- LONDON DISPERSION FORCES
Description : AS A GROUP, the halogens have the largest: w) atomic radii x) Boiling points y) electronegativities z) ionization energies
Last Answer : ANSWER: Y -- ELECTRONEGATIVITIES
Description : Which of the following groups of elements have an OUTER ELECTRONIC configuration of S-2-P-2? w) halogens x) Nitrogen-Phosphorus Group y) Carbon-Silicon Group z) Boron-Aluminum Group
Last Answer : ANSWER: Y -- CARBON-SILICON GROUP
Description : The elements that have an outer electron configuration ns2 (read: n - s - 2) are called: w) halogens x) transition metals y) alkaline earths z) noble gases
Last Answer : ANSWER: Y -- ALKALINE EARTHS
Description : Which of the following halogens does NOT replace the other halogens from their compounds? w) fluorine x) iodine y) bromine z) chlorine
Last Answer : ANSWER: X -- IODINE
Description : The elements in group 1A of the periodic table are called: w) halogens x) alkaline earths y) alkali metals z) rare earths
Last Answer : ANSWER: Y -- ALKALI METALS
Description : A compound 'X' of the formula `C_(3)H_(8)O` gives iodoform test. On oxidation with acidified `K_(2)Cr_(2)O_(7)X` gave Y. Y also gives iodogorm test. T
Last Answer : A compound 'X' of the formula `C_(3)H_(8)O` gives iodoform test. On oxidation with acidified `K_(2)Cr_(2) ... ` D. `CH_(3)COCH_(3), CH_(3)CHOHCH_(3)`
Description : With respect to halogens, four statements are given below: (P) The bond dissociation energies for halogens are in the order: `I_(2) lt F_(2) lt Br_(2)
Last Answer : With respect to halogens, four statements are given below: (P) The bond dissociation energies for halogens are in ... ,III,IV C. II,III,IV D. I,III
Description : Match List - I (compound) with list - II (Oxidation state of N) and select the correct answer using the codes given below the list :- `{:(" List - I",
Last Answer : Match List - I (compound) with list - II (Oxidation state of N) and select the correct answer using the codes given below ... {:(A,B,C,D),(b,c,d,e):}`
Description : Correct order of boiling point of halogens is
Last Answer : Correct order of boiling point of halogens is A. `F_2 lt Cl_2 lt Br_2 lt I_2` B. `Cl gt F_2 gt Br_2 ... Br_2 gt I_2` D. `Cl_2 lt F_2 lt Br_2 lt I_2`
Description : Enzymes contain 1. Peptide bonds 2. Amino acids 3. Halogens 4. Fatty acids The correct answers are: (a) 1 and 4 (b) 1,3 and 4 (c) 1 and 2 (d) 2, 3 and 4
Last Answer : Ans:(c)
Description : The order of stability of halides of sulphur with different halogens is
Last Answer : The order of stability of halides of sulphur with different halogens is A. `I^(-) gt Br^(-) gt Cl^(-) gt F^(-)` ... `F^(-) gt Cl^(-) gt I^(-) Br^(-)`
Description : Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction oxidation state of iron .
Last Answer : Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction ... . changes from +2 to +4 D. does not change.
Description : `XeF_(6)` reacts with silica to form xenon compound X. The oxidation state of Xe in X is :
Last Answer : `XeF_(6)` reacts with silica to form xenon compound X. The oxidation state of Xe in X is :
Description : Consider the following statements : `1.` If `A={(x,y) in [RxxR : x^(3)+y^(3)=1]}` and `B={(x,y) in [R: (x-y)=1]}`, then `AnnB` contains exactly one el
Last Answer : Consider the following statements : `1.` If `A={(x,y) in [RxxR : x^(3)+y^(3)=1]}` and `B={(x,y) ... only C. Both `1` and `2` D. Neither `1` nor `2`
Description : Consider the following statements about pollination. 1. Transfer of pollen grains from the anther to ovules in the same flower or a different f lower is called pollination. 2. The pollination by wind is called anemophily. 3. Pollination is a ... 1 and 3 (b) 1, 2 and 4 (c) Only 2 (d) 1, 2, 3 and 4
Description : .Consider the following four statements whether they are correct or wrong. A. The sporophyte in liverworts is more elaborate than that in mosses. B. Salvinia is heterosporous. C. The life-cycle in all seed-bearing plants is diplontic ... are (a) A and C (b) A and D (c) B and C (d) A and B
Last Answer : (b) A and D
Description : Three resistors which have different values are connected in series. Which one of the following statements is correct? w) The potential drop across all three resistors is the same. x) The same current passes through all three resistors. y) The same power is dissipated by all three resistors.
Last Answer : ANSWER: X -- THE SAME CURRENT PASSES THROUGH ALL THREE RESISTORS.
Description : Consider the following statements. In case of flood routing in a river channel by Muskingum method, the coefficient x represents : 1. A dimensionless constant indicating the relative importance of inflow and outflow in determining storage ... , 3 and 4 only (c) 1, 2 and 3 only (d) 2, 3 and 4 only
Last Answer : (b) 1, 3 and 4 only
Description : Iodine shows the highest oxidation state in the compound :-
Last Answer : Iodine shows the highest oxidation state in the compound :- A. `KI` B. `KI_(3)` C. `IF_(5)` D. `KIO_(4)`
Description : Give the formula of a compound in which carbon exhibit an oxidation state of : A. +4 B. +2 C. -4
Last Answer : Give the formula of a compound in which carbon exhibit an oxidation state of : A. +4 B. +2 C. -4
Description : When Is the oxidation state of metal indicated in the name of the compound?
Last Answer : It is a method to distinguish different ions of a metal.
Description : Select the compound in which chlorine shows oxidation state + 7?
Last Answer : HClO4
Description : Which is the compound in that oxygen shows + 2 oxidation state?
Last Answer : F2O
Description : The oxidation state exhibited by hydrogen in its various compound ares------------------------
Last Answer : Ans: +1.-1 and Zero
Description : Which halogen's zeron number is not variable ?
Last Answer : The number of fluorine germs is not variable.
Description : Which of the following properties among halogens decreases from fluorine to iodine ?
Last Answer : Which of the following properties among halogens decreases from fluorine to iodine ? A. Eelectronegativity B. Electron ... energy D. (1) & (3) both
Description : Among the following reactoin of hydrogen with halogens, the one that requires a catalyst is
Last Answer : Among the following reactoin of hydrogen with halogens, the one that requires a catalyst is A. `H_2 + F_2 to ... I_2 to 2HI` D. `H_2 + Br_2 to 2HBr`
Description : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... and C black D. `Na(CN)_2^-`
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... NaBr C. (C) NaF D. (D) Nal
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... . H_2O` D. (D) None of these
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides ... . `NaCN, NaOCN` D. `HCOONa, NH_3`
Description : `DeltaH_"vaporisation"` (KJ/mol) are given for the hydrides of halogens in the following graph. The hydride HF will correspond to
Last Answer : `DeltaH_"vaporisation"` (KJ/mol) are given for the hydrides of halogens in the following graph. The hydride HF will ... . (B)Q C. (C)R D. (D)S
Description : `F_2` reacts with `H_2O` as follows: `F_2+H_2O to H^(+) + F^(-) +O_2` Which of the following halogens shows same reaction but In opposite direction?
Last Answer : `F_2` reacts with `H_2O` as follows: `F_2+H_2O to H^(+) + F^(-) +O_2` Which of the following halogens shows ... ? A. `Br_2` B. `Cl_2` C. `I_2` D. All
Description : Sodium extract is heated with concentrated `HNO_(3)` before testing for halogens because :
Last Answer : Sodium extract is heated with concentrated `HNO_(3)` before testing for halogens because : A. Ag reacts ... )` and hence do not interfere in the test.
Description : Hydrogen shows similarity with alkali metals as well as halogens.
Last Answer : Explain : Hydrogen shows similarity with alkali metals as well as halogens.
Description : What is the symbol of halogens?
Last Answer : Need answer
Description : What is the most active group of nonmetals noble gases alkaline earth halogens alkali metals?
Last Answer : The most active metals are alkali metals.The most active nonmetals are halogens.
Description : Who has the most active group of nonmetals noble gases alkaline earth halogens alkali metals?
Last Answer : Kevin
Description : Do displacement reactions only occur between halogens?
Last Answer : Also other elements can be involved.