Description : In the conversion fo ` Br_2` to `BrO_3^(-)` , the oxidation state of `Br` changes from.
Last Answer : In the conversion fo ` Br_2` to `BrO_3^(-)` , the oxidation state of `Br` changes from. A. 0 to 5 B. 1 to 5 C. 0 to `-3` D. 2 to 5
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 : Number of moles of `MnO_(4)^(-)` required to oxidise one mole of ferrous oxalate completely in acidic medium will be
Last Answer : Number of moles of `MnO_(4)^(-)` required to oxidise one mole of ferrous oxalate completely in acidic medium ... .2 moles C. 0.6 moles D. 0.4 moles
Description : If equal volumes of `0.1 M KMnO_(4)` and `0.1 M K_(2)Cr_(2)O_(7)` solutions are allowed to oxidise `Fe^(2+)` to `Fe^(3+)` in acidic medium, then `Fe^(
Last Answer : If equal volumes of `0.1 M KMnO_(4)` and `0.1 M K_(2)Cr_(2)O_(7)` solutions are allowed to ... O_(7)` C. equal in both cases D. cannot be determined.
Description : (A) Cation carriers, e.g., `H-Br,Cl-OH` and `Br-Br` and oxidising agents such as `O_(3)` and `R-O-O-R`, etc. act as electrophilic reagents. (R) Electr
Last Answer : (A) Cation carriers, e.g., `H-Br,Cl-OH` and `Br-Br` and oxidising agents such as `O_(3)` and ... incorrect. D. IF (A) is incorrect but (R) is correct.
Description : In a `S_(N^(2))` substitution reaction of the type `R-Br+Cl^(-)overset("DMF")rarrR-Cl+Br^(-)` Which one of the following has the highest relative rate
Last Answer : In a `S_(N^(2))` substitution reaction of the type `R-Br+Cl^(-)overset("DMF")rarrR-Cl+Br^(-)` Which one of ... CH_(2)Br` D. `(CH_(3))_(2)CH-CH_(2)Br`
Description : For the following `(i) I^(-) (ii) Cl^(-) (iii) Br^(-)` the increasing order of nucleophilicity would be:
Last Answer : For the following `(i) I^(-) (ii) Cl^(-) (iii) Br^(-)` the increasing order of nucleophilicity would be: A. ... )ltCl^(-)` D. `Cl^(-)ltBr^(-)ltI^(-)`
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 : The increasing order of reactivity among group 1 elements is Li
Last Answer : Ans. In group 1 elements (alkali metals) the reactivity of the metals is mainly due to the electron releasing tendency of their atoms, which is related to ionization enthalpy, Since ... electron gain enthalpy. Since both of them decrease down the group, the reactivity therefore decreases.
Description : Arrange the following order of the property indicated: (a). F, Cl, Br and I (negative electron gain enthalpy) (b). Mg, Al, Si and Na (ionization enthalpy) (c). C, N, O and F (second ionization enthalpy)
Last Answer : Ans. (a). I
Description : Which of the following is the strongest nucleophile in an aqueous solution? (a) HO– (b) Cl– (c) Br– (d) I
Last Answer : I–
Description : Which of the following is the best leaving group? (a) F– (b) Cl– (c) Br– (d) I–
Description : The halogen with the largest atomic radius is: w) Cl x) I y) Br z) At
Last Answer : ANSWER: Z -- At
Description : `ClO_3^-`ion leads with `I_2` to from
Last Answer : `ClO_3^-`ion leads with `I_2` to from A. (A) `ClO_4 ^-` B. (B) `IO_3^-` and `Cl_2 ` C. (C) ICI and `O_2` D. (D) ICI and `O_3 `
Description : `Cl_2 + NH_3` (excess) `to A+B`
Last Answer : `Cl_2 + NH_3` (excess) `to A+B` A. (A) One of the product Is also obtained by decomposition ... is used instead of `Cl_2`, one of product remain same
Description : How many of the following reactions would have HCl as one of the products ? (a)`CH_4+CI_2 to ` (b) `FeSO_4 + H_2SO_4 + Cl_2 to` (c) `l_2+Cl_2+H_2O to
Last Answer : How many of the following reactions would have HCl as one of the products ? (a)`CH_4+CI_2 to ` (b) ` ... h) `Cl_2O_7+H_2O to` (i)`Cl_2+NaOH(conc) to`
Description : Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A is treatedwith `Br_2` water it is conve
Last Answer : Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A ... . The structure ofA is A. B. C. D.
Description : `Br_2+F_2` (excess)`to`A `overset("Hydrolysis")to` B+C The summation of atomicities of compound A, B and C is :
Last Answer : `Br_2+F_2` (excess)`to`A `overset("Hydrolysis")to` B+C The summation of atomicities of compound A, B and C is :
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 : The correct values of ionization enthalpies(in KJ `"mol"^(-1)`) of Si, P, Cl, and S respectively are: a)`786, 1012, 999, 1256` b)`1012, 786, 999, 1256
Last Answer : The correct values of ionization enthalpies(in KJ `"mol"^(-1)`) of Si, P, Cl, and S respectively are: ... . `786,1012,1256,999` D. `786,999,1012,1256`
Description : a=difference in the oxidation number of Cl in the product X and product Y, respectively b= total number of atom in X and Y c=total number of lone pair
Last Answer : a=difference in the oxidation number of Cl in the product X and product Y, respectively b= total number of ... lone pair in X then calculate a+b+c = ?
Description : When `S_(2)O_(8)^(2-)` oxidise `Fe^(2+)` then product formed is :-
Last Answer : When `S_(2)O_(8)^(2-)` oxidise `Fe^(2+)` then product formed is :- A. `s_(2)O_(6)^(2-)` B. `SO_(4)^(2-)` C. `S_(2)O_(8)^(2-)` D. `SO_(5)^(2-)`
Description : All living organisms retain the enzymatic machinery to partially oxidise glucose without the help of oxygen. This breakdown of glucose to pyruvic acid
Last Answer : All living organisms retain the enzymatic machinery to partially oxidise glucose without the help of oxygen ... of glucose to pyruvic acid is called.
Description : The ionisation energy of dioxygen (`O_2`) is very close to that of Xenon. Also F and O have the highest electronegativity and consequently can oxidise
Last Answer : The ionisation energy of dioxygen (`O_2`) is very close to that of Xenon. Also F and O have ... (D) clathrates with He and Ne are highly expolsive.
Last Answer : The ionisation energy of dioxygen (`O_2`) is very close to that of Xenon. Also F and O have ... +6HF underset(Delta)overset("475 K")to XeF_6+3H_2O`
Last Answer : The ionisation energy of dioxygen (`O_2`) is very close to that of Xenon. Also F and O have the highest ... Ill), (lV) D. (D) (I), (lV)
Description : `underset("Brown")([(NH_(3))_(5)Co-O-O-Co(NH_(3))_(5)]^(4+)) underset("oxidise")overset([S_(2)O_(8)]^(2-))tounderset("Green")([(NH_(3))_(5)Co-O-O-Co(N
Last Answer : `underset("Brown")([(NH_(3))_(5)Co-O-O-Co(NH_(3))_(5)]^(4+)) underset("oxidise")overset([S_(2)O_(8) ... III " "IV" & "III" "III),("brown "" green"):}`
Description : Consider the following statements in the extraction of iron from haematite: (I) `CO`is the main reducing agent (II) `Fe_(2)O_(3)`is used to oxidise th
Last Answer : Consider the following statements in the extraction of iron from haematite: (I) `CO`is the main reducing agent (II) ... I, II and III D. I, II and IV
Description : The Brake Horse power of the motor (efficiency 60%) required for a pump of capacity 0.075 cumec for a total lift of 12 m, is A. 10 B. 15 C. 20 D. 25 Q No: 44 Aerobic bacterias A. ... presence of free oxygen B. Consume organic matter as their food C. Oxidise organic matter in sewage D. All the above
Last Answer : ANS: D
Description : Why pcc cannot oxidise methanol to methane and while KMnO4 can ?
Last Answer : Ans. This is because pcc is a mild oxidising agent and can oxide methanol to methanal only. While KMnO4 being strong oxidising agent oxidises it to methanoic acid.
Last Answer : This is because pcc is a mild oxidising agent and can oxide methanol to methanal only. While KMnO4 being strong oxidising agent oxidises it to methanoic acid.
Description : Both silver and copper oxidise in air. Then why copper contacts are silver-plated?
Last Answer : The silver plating avoids the oxidation of copper, especially in outdoors. Silver oxidises very readily. But its oxide is a good electrical conductor but copper oxide produce a film of insulation.
Description : Nitrifying bacteria (a) oxidise ammonia to nitrates (b) convert free nitrogen to nitrogen compounds (c) convert proteins into ammonia (d) reduce nitrates to free nitrogen.
Last Answer : (a) oxidise ammonia to nitrates
Description : At break point of chlorination, (A) Chlorine is used to oxidise (B) Residual chloride is zero (C) Residual chloride is maximum (D) Residual chlorine reappears
Last Answer : (D) Residual chlorine reappears
Description : Biochemical Oxygen Demand (BOD) of sewage is the (a) Oxygen required to oxidise (b) Oxygen required to oxidise biologically inactive organic matter* (c) a and b both (d) none of these
Last Answer : (b) Oxygen required to oxidise biologically inactive organic matter*
Description : The most acidic and most thermally stable set of chalcogen hydrides are respectively:
Last Answer : The most acidic and most thermally stable set of chalcogen hydrides are respectively: A. `H_(2)O,H_(2)s` B. `H_(2) ... )O,H_(2)Te` D. `H_(2)S,H_(2)Te`
Description : Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution (A) A1is more alkaline than solution A2 (B) A1is highly acidic (C) A2is very slightly acidic (D) Both (B) & (C)
Last Answer : (D) Both (B) & (C)
Description : Predict the products in the given reaction CHO Cl 50% KOH (1) OH OH OH O - O (2) OH Cl Cl O O - (3) OH OH OH OH (4) OH Cl Cl O - O Sol: [4] CHO Cl 50% KOH COOK Cl Cl OH
Last Answer : CHO Cl 50% KOH COOK Cl Cl OH
Description : What does "BR" stand for on the temperature dial of my oven?
Last Answer : Broil is correct…. put it on and you should see the top burner turn on
Description : Can I use Br.Bonners dish water directly on plants?
Last Answer : Try it on one plant you are not particularly fond of. I dumped some water from an empty milk bottle I was rinsing out; the plant did not flourish.
Description : my vanda orchided looks dried up, can it br revived
Last Answer : Need Answer
Description : What word starting with BR, that with the addition of the letter E, becomes another word that sounds the same as the first? -Riddles
Last Answer : Braking becomes Breaking.
Description : Write the expansions of the following tags used in HTML. 1. -Technology
Last Answer : 1. — Break line2. — Italic3. – Horizontal Rule4. — Underline
Description : Difference between and tags. -Technology
Last Answer : tag is used to insert a line break which means the text/image following the tag will be moved to the next line while tag is used to insert horizontal line that can divide the information into sections.
Description : Distinguish between tag and tag with the help of an example. -Technology
Last Answer : Distinguishing between tag and tag are as follows: tag tagIt is a container element.It is an empty element.It is used to define a paragraph ofthe text on the Web page.It is used to insert line break.It ... no attribute.e.g. This ts a paragraph.e.g.This is a 1 line break into the Web document.
Description : Write the purpose of HTML. Distinguish between tag and tag. -Technology
Last Answer : HTML is used to represent page, data on website with proper manner and attractive look to get maximum users.Difference between tag and tagtag is a block level element, and is mainly used to add content, whereas the tag is used to force a line break within the element.
Description : What is the atomic number of Br ?
Last Answer : The atomic number of Br is 35