Description : What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper? (1) There is a crackling sound (2) There is a violent explosion (3) There is no reaction (4) The paper ignites
Last Answer : (2) There is a violent explosion Explanation: When solid Potassium Permanganate (KMnO4) is mixed with pure glycerol or other simple alcohols, it will result in a violent combustion ... Permanganate is an extremely powerful oxidizer which spontaneously ignites after coming in contact with glycerol.
Description : In which year the violent explosion of the famous Volcano, Krakatoa in Indonesia, produced Tsunamis measuring 40 feet? a. 1881 b. 1882 c. 1883 d. 1884
Last Answer : c. 1883
Description : In which year the violent explosion of the famous Volcano, Krakatoa in Indonesia, produced Tsunamis measuring 40 feet? a. 1883 b. 1881 c. 1882 d. 1884
Last Answer : a. 1883
Description : I recently have this crackling sound in my left ear..has been like 2 weeks now..any suggestions.. almost feels like something moving... concerned.
Last Answer : Go see a doctor.
Description : What is this weird crackling sound in my ear?
Last Answer : I'd guess drainage. My ears make similar noises sometimes during sinus infections. Either that or an ant has found its way to your ear and is currently burrowing through your earwax. Happened to my mother ... her ears with the covers at night now always. I don't know she breathes. Beware of ants.
Description : The crackling sound, heard when dry hair is combed with a hard rubber comb, is due to (a) the hair banging against the charged comb (b) small electric sparks (c) the rubbing of the comb with the hair (d) breaking of the comb
Last Answer : Ans:(b)
Description : A crackling sound associated with myonecrosis is due to a. Respiratory Distress Due To Plague. b. Nerve Contractions Due To Tetanus. c. Lymph Node Swelling Due To Plague. d. Gas Produced By C. Perfringens.
Last Answer : d. Gas Produced By C. Perfringens.
Description : Which of the following terms refers to a grating or crackling sound or sensation? a) Crepitus Crepitus may occur with movement of ends of a broken bone or irregular joint surface. b) ... to rhythmic contraction of muscle. d) Fasciculation Fasciculation refers to involuntary twitch of muscle fibers.
Last Answer : a) Crepitus Crepitus may occur with movement of ends of a broken bone or irregular joint surface.
Description : Use of raschig rings in place of crushed stones as packing in packed beds (other things being same) (A) Increases pressure drop, increases surface area (B) Increases pressure drop, decreases ... (C) Decreases pressure drop, increases surface area (D) Decreases pressure drop, decreases surface area
Last Answer : (C) Decreases pressure drop, increases surface area
Description : Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the (A) Packing may be crushed due to thermal expansion/contraction of the ... C) Viscosity variation of the fluids may cause channelling/flooding (D) None of these
Last Answer : (A) Packing may be crushed due to thermal expansion/contraction of the components of the equipments
Description : The disappearance of the purple color of KMnO4 in its reaction with alkene is known as (a) Markovnikov test (b) Grignard test (c) Baeyer test (d) Wurtz test
Last Answer : Baeyer test
Description : If you had clean urine and added a crushed hydro into it would it show on a drug test at a doctors office?
Last Answer : It would show up but the concentration would be way off what should show up since it hasn’t been through any filtering in your body. Why would you need to test positive for it?
Description : What happens when? a) A cleaned iron plate or iron nail is kept in 10g of copper sulphate solution. b) A pinch of mercuric oxide is kept in a test tube. c)A small crystal of silver nitrate is dissolved in distilled water and a drop of ammonium hydroxide & a pinch of glucose powder are added.
Last Answer : a) A cleaned iron plate or iron nail is kept in 10g of copper sulphate solution. After a few hours a coating of copper is seen on iron nail/plate. It is based on displacement reaction. ... on the inner walls of the test tube. Aldehyde group in glucose reduced silver nitrate to metallic silver.
Description : A coal having high amount of volatile matter (A) Would require smaller combustion chamber (B) Produces very little of tar and gas on carbonisation (C) Ignites easily and burns with long smoky flame (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Anthracite coal (A) Contains more volatile matter than bituminous coal (B) Ignites more easily than bituminous coal (C) Is essentially a coking coal (D) Burns with short, bluish, yellow-tipped flame producing very little smoke
Last Answer : (D) Burns with short, bluish, yellow-tipped flame producing very little smoke
Description : Bituminous coal (A) Ignites less easily than anthracite (B) Is generally coking (C) Burns with smoky yellow flame (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : A two-stage rocket attains a velocity of 3,000 meters per second when it drops the first stage and ignites the second. It consumes 1 kilogram of fuel per second and its exhaust speed is 2,000 meters per second. ... ? w) 2,000 Newtons x) 3,000 Newtons y) 2,000 Newton-seconds z) 3,000 Newton-seconds
Last Answer : ANSWER: W -- 2,000 NEWTONS
Description : What is the product of a reaction between Cu3PO4 and KMnO4?
Last Answer : The chemical reaction is:Cu3PO4 + 3 KMnO4 = 3 CuMnO4 + K3PO4
Description : Mercaptans are added to liquefied petroleum gas (LPG) to (A) Reduce its cost (B) Narrow down its explosion limit (C) Assist in checking its leakage from cylinder (D) Increase its calorific value
Last Answer : (C) Assist in checking its leakage from cylinder
Description : What should I do if my speakers are crackling when connected to my laptop but not any other devices?
Last Answer : Had the same problem before and in my case, my Bose speakers were too close to my internet modem.
Description : Describe an activity to observe what happens when quick lime is added to water taken in a beaker. State two important observations and name the type of reaction taking place. -Chemistry
Last Answer : Answer. Aim: To observe what happens when quicklime is added to water taken in a beaker. Materials Required:- Quicklime (calcium oxide), water, beaker.Procedure: 1. Take 5 g of calcium oxide in a ... example for each of decomposion reaction carried out with help of (i) Electricity (ii) Heat (iii)
Description : (a) Write the essential condition for the following reaction to take place: 2AgBr--> 2Ag + Br2 Write one application of this reaction. (b) Complete the following chemical equation of a chemical ... science-5 (c) What happens when water is added to quick line. Write chemical equation. -Chemistry
Last Answer : Answer. This reaction is used in photography. (c) Slaked lime is formed with hissing sound and lot of heat is envolved.
Description : What happens when a catalyst is added to a system at equilibrium? A The reaction follows an alternative pathway of lower activation energy. B The heat of reaction decreases. C The potential ... decreases. D The potential energy of the products decreases. E The rate of chemical reaction decreases.
Last Answer : A The reaction follows an alternative pathway of lower activation energy.
Description : Atomic explosion is triggered by - (1) thermo nuclear reaction (2) chemical reaction (3) controlled chain reaction (4) uncontrolled chain reaction
Last Answer : (4) uncontrolled chain reaction Explanation: During an uncontrolled nuclear chain reaction such as atomic explosion, a radioactive substance gives off energy at a rate that increases rapidly with time, ... its neighbors, in turn setting off other atoms; thus, producing large amounts of energy.
Description : Atomic explosion is triggered by (1) thermo nuclear reaction (2) chemical reaction (3) controlled chain reaction (4) uncontrolled chain reaction
Last Answer : uncontrolled chain reaction
Description : KMnO4 can be used as a/an - (1) insecticide (2) fertiliser (3) pesticide (4) disinfectant
Last Answer : (4) disinfectant Explanation: Potassium permanganate is an inorganic chemical compound with the formula KMnO4. As an oxidant, potassium permanganate can act as an antiseptic. For example, dilute solutions ... infections of the hands or feet. It is used extensively in the water treatment industry.
Description : KMnO4 can be used as – (1) Insecticide (2) Fertilizer (3) Pesticide (4) Disinfectant
Last Answer : (4) Disinfectant Explanation: Potassium permanganate is an inorganic chemical compound with the formula KMnO4. As an oxidant, potassium permanganate can act as an antiseptic. For example, dilute ... of the hands or feet. Potassium permanganate is used extensively in the water treatment industry.
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 : Which of the following statements is false about benzylamine? (a) can be prepared by reduction of benzonitrile with LiAlH4. (b) cannot be prepared by reduction of benzamide with LiAlH4. (c) reacts with nitrous acid to give benzyl alcohol. (d) reacts with KMnO4 to give benzoic acid.
Last Answer : cannot be prepared by reduction of benzamide with LiAlH
Description : Which of the following statements is False/Incorrect about nitrobenzene? (a) is formed by nitration of benzene at temperatures below 60°C. (b) can be further nitrated to give m-dinitrobenzene. (c) can be oxidized with KMnO4 to give benzoic acid. (d) can be reduced with Sn/HCl to give aniline.
Last Answer : can be oxidized with KMnO4 to give benzoic acid
Description : Which of the following statements is false about toluene? (a) can be prepared by treating benzene with methyl chloride in the presence of AlCl3. (b) is converted to benzoic acid on refluxing with ... (d) can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene.
Last Answer : can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene
Description : Uric acid on oxidation with alkaline KMnO4 forms : (a) Urea (b) Barbituric acid (c) Allantoin (d) Caffeine
Last Answer : Allantoin
Description : Aldehydes undergo oxidation with KMnO4/H+ to give (a) Alcohols (b) Acetals (c) Ketones (d) Acids
Last Answer : Acids
Description : Which of the following reagents readily react with ethyl methyl ether? (a) NaOH (b) Conc HI (c) KMnO4 (d) H2O
Last Answer : Conc HI
Description : Ethylene glycol undergoes oxidation with hot acidic KMnO4 to form : (a) Formic acid (b) Formaldehyde (c) Acetic acid (d) Acetaldehyde
Last Answer : Formic acid
Description : Which of the following reagents can be used to oxidize 1° alcohols to aldehydes? (a) KMnO4 (b) MnO2 (c) K2Cr2O7 (d) PCC
Last Answer : PCC
Description : Which one of the following compounds will (a) decolorizes dilute cold KMnO4 ; (b) decolorizes bromine water ; and (c) gives a white precipitate with ammoniacal AgNO3 solution. (a) 1-Hexene (b) 1-Hexyne (c) 2-Hexene (d) 2-Hexyne
Last Answer : 1-Hexyne
Description : Which of the following alkenes gives only acetic acid on oxidation with hot concentrated KMnO4. (a) Ethylene (b) 1-Butene (c) Propene (d) 2-Butene
Last Answer : 2-Butene
Description : Which of the following reagents will react with propene? (a) Hot alkaline KMnO4 (b) Sodium metal (c) Cold dilute HNO3 (d) LiAlH4
Last Answer : Hot alkaline KMnO4
Description : Baeyer's reagent is (a) dilute KMnO4 (b) HCl + ZnCl2 (c) Br2 in CCl4 (d) NH2NH2
Last Answer : dilute KMnO4
Description : Which reagent is used for conversion of benzaldehyde into toluene? a. KMnO4/NaOH b. NH2NH2/KOH c. HIO4 d. V2O5
Last Answer : b. NH2NH2/KOH
Description : KMnO4 can be used as a/an (1) insecticide(2) fertiliser (3) pesticide (4) disinfectant
Last Answer : disinfectant
Description : When aniline is heated with glycerol in the presence of sulfuric acid and nitrobenzene, it gives quinoline. This reaction in called (a) Fischer synthesis (b) Skraup synthesis (c) Diazotization (d) Corey-House synthesis
Last Answer : Skraup synthesis
Last Answer : Fish Gas field Explosion Occurred in 1994 .
Description : Why does the fireworks sound come after a second of an explosion?
Last Answer : The visible light that we see as the explosion travels at the speed of light, which is 300,000,000 m/s, and the speed of sound is about 340 m/s. So it takes longer for the sound to reach you.
Description : What If Sound travels at a speed of about 760 miles per hour and you are located at a distance of 19 miles from a very loud explosion approximately how long will it take from the time of the explosion?
Last Answer : What is the answer ?
Description : A bomb explodes on the moon. You will hear its sound on earth after – (1) 20 minutes (2) 2 hours 20 minutes (3) 3.7 hours (4) You cannot hear the sound of explosion
Last Answer : (4) You cannot hear the sound of explosion Explanation: The sound will never reach Earth because there are not enough molecules or atoms of matter per cubic centimeter of space to create the pressure waves ... Sound propagation needs a medium. The people on the Earth can see the flash, but no sound.
Description : A bomb explodes on the moon. You will hear its sound on earth after ______ (1) 20 minutes (2) 2 hours 20 minutes (3) 3.7 hours (4) You cannot hear the sound of explosion
Last Answer : You cannot hear the sound of explosion