Peroxides such as hydrogen peroxide and benzoyl peroxide are commonly used in small quantities in over-the-counter preparations such as antiseptics and acne creams. What hazard do peroxides present in higher concentrations? w) explosive x) strongly acidic y) strongly basic z) there is no hazard

1 Answer

Answer :

ANSWER: W -- EXPLOSIVE

Related questions

Description : A solution with a pH of 12 is: w) weakly acidic x) strongly acidic y) weakly basic z) strongly basic

Last Answer : ANSWER: Z -- STRONGLY BASIC

Description : Benzoyl peroxide (benzac 4%) cream Can blackheads be used for acne ?

Last Answer : Yes it is used in the treatment of bronchitis. If you have acne on your back then use the doctor's advice is not a problem.

Description : Nitrous oxide, commonly called laughing gas, has been a matter of concern to environmentalists recently because: w) it is thought to cause cancer at low concentrations. x) it produces photochemical smog. y) it is a greenhouse gas. z) none of the above

Last Answer : ANSWER: Y -- IT IS A GREENHOUSE GAS.

Description : Ethers are kept in brown bottles because (a) Brown bottles are cheaper than colorless clear bottles (b) Ethers absorb moisture (c) Ethers evaporate readily (d) Ethers are oxidized to explosive peroxides

Last Answer : Ethers are oxidized to explosive peroxides

Description : Relative to a solution with a pH of 4, a solution of pH = 6 is: w) higher in H+ concentration x) lower in OHy) less basic z) less acidic

Last Answer : ANSWER: Z -- LESS ACIDIC

Description : Vulcanization is the process of cross-linking polymer chains in rubber using (a) Sulfur. (b) Formaldehye. (c) Benzoyl peroxide. (d) Ethylene glycol.

Last Answer : Sulfur.

Description : Which of the following elements would form an acid oxide with the formula XO2 and an acidic compound with hydrogen with the formula XH2? w) Sodium x) Magnesium y) Aluminum z) Sulfur

Last Answer : ANSWER: Z -- SULFUR

Description : In the reaction `CH_(3)-CH=CH_(2)overset(HX)underset("Benzoyl peroxide")rarrunderset("(A)")(CH_(3)CH_(2)CH_(2)X)` The product (A) cannot be obtained b

Last Answer : In the reaction `CH_(3)-CH=CH_(2)overset(HX)underset("Benzoyl peroxide")rarrunderset("(A)")(CH_(3)CH_(2)CH_(2 ... by using: A. HBr B. HCl C. HI D. HF

Description : What are the major constituents of typical fly ash particles generated from the combustion of coal? w) acidic and basic oxides x) trace elements y) unburned carbon z) sulfates and phosphates

Last Answer : ANSWER: W -- ACIDIC AND BASIC OXIDES 

Description : Acids react with bases to form which of the following? Do they form: w) salt and acidic anhydride x) water and basic anhydride y) basic anhydride and salt z) salt and water

Last Answer : ANSWER: D -- SALT AND WATER

Description : The Rate Law expresses the rate of a reaction in terms of the concentrations of the: w) reactants x) products y) by-products z) catalysts

Last Answer : ANSWER: W -- REACTANTS 

Description : Which of the following is not a food additive? (A) Citric acid (B) Invertage (C) Benzoyl peroxide (D) Ammonium chloride

Last Answer : (D) Ammonium chloride

Description : Thioglycolic acid-like compounds have applications in following type of cosmetic formulations : (A) Depilatory preparations (B) Epilatory preparations (C) Vanishing creams (D) Skin tan preparations

Last Answer : (A) Depilatory preparations

Description : Oxygen has a valence number of -1 in: w) Sodium Peroxide x) Potassium Chlorate y) Water z) Sodium Hydroxide

Last Answer : ANSWER: W -- SODIUM PEROXIDE

Description : Which one of the following is commonly used for pulp bleaching in the paper industry? (1) Mild sulphuric acid (2) Glucose isomerase (3) Hydrogen peroxide (4) Iodine and water

Last Answer : (3) Hydrogen peroxide Explanation: Bleaching of wood pulp is the chemical processing carried out to decrease the color of the pulp, so that it becomes whiter. Alkaline hydrogen ... responsible for absorbing visible light. The decomposition of hydrogen peroxide is catalyzed by transition metals.

Description : Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes? (1) Borax (2) Saltpetre (3) Hydrogen peroxide (4) Sodium chloride

Last Answer : (4) Sodium chloride Explanation: Antiseptics are antimicrobial substances that are applied to living tissue/skin to reduce the possibility of infection, sepsis, or putrefaction. Antiseptics are generally ... the body, and from disinfectants, which destroy microorganisms found on non-living objects.

Description : Which one of the following is commonly used for pulp bleaching in the paper industry? (1) Mild sulphuric acid (2) Glucose isomerase (3) Hydrogen peroxide (4) Iodine and water

Last Answer :  Hydrogen peroxide

Description : Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ? (1) Borax (2) Saltpetre (3) Hydrogen peroxide (4) Sodium chloride

Last Answer : Sodium chloride

Description : Hydrogen peroxide oxidises `[Fe(CN)_(6)]^(4-)` to `[Fe(CN)_(6)]^(3-)` in acidic medium but reduces `[Fe(CN)_(6)]^(3-)` to `[Fe(CN)_(6)]^(4-)` in alkal

Last Answer : Hydrogen peroxide oxidises `[Fe(CN)_(6)]^(4-)` to `[Fe(CN)_(6)]^(3-)` in acidic medium but reduces `[Fe(CN)_( ... 2) O + O_(2)) and (H_(2)O + OH^(-))`

Description : Hydrogen peroxide oxidises `[Fe(CN)_(6)]^(4-)` to `[Fe(CN)_(6)]^(3-)` in acidic medium but reduces `[Fe(CN)_(6)]^(3-)` to `[Fe(CN)_(6)]^(4-)` in alkal

Last Answer : Hydrogen peroxide oxidises `[Fe(CN)_(6)]^(4-)` to `[Fe(CN)_(6)]^(3-)` in acidic medium but reduces `[Fe(CN)_( ... 2) O + O_(2)) and (H_(2)O + OH^(-))`

Description : Iceland is least likely to have w) a fissure eruption x) a lava plateau y) an explosive eruption z) a shield volcano

Last Answer : ANSWER: Y -- AN EXPLOSIVE ERUPTION

Description : Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because (A) It is hygroscopic and explosive in nature (B) It is highly acidic in nature (C) It is a liquid at room temperature (D) Its nitrogen content is very less

Last Answer : (A) It is hygroscopic and explosive in nature

Description : What is the product formed when sodium bicarbonate is heated strongly? (1) Sodium Carbonate (2) Sodium Hydroxide (3) Sodium Peroxide (4) Sodium Monoxide

Last Answer : (1) Sodium Carbonate Explanation: When sodium bicarbonate is strongly heated, it decomposes into sodium carbonate, water vapor, and carbon dioxide. Solid sodium carbonate is a white powder and is used in ... name 'baking powder'; sodium bicarbonate is used in baking under the name 'baking soda'.

Description : What is the product formed when sodium bicarbonate is heated strongly? (1) Sodium Carbonate (2) Sodium Hydroxide (3) Sodium Peroxide (4) Sodium Monoxide

Last Answer : Sodium Carbonate

Description : Refracting telescopes, if uncorrected, suffer from chromatic aberration. Chromatic aberration occurs because: w) red light is focused more strongly than blue light x) blue light is focused more strongly than ... central rays, z) the central light rays are focused more strongly than the outer rays.

Last Answer : ANSWER: X -- BLUE LIGHT IS FOCUSED MORE STRONGLY THAN RED LIGHT 

Description : Benzoyl chloride reacts with hydrogen in the presence of palladium and barium sulfate to give : (a) Benzyl alcohol (b) Benzaldehyde (c) Cinnamic acid (d) Benzophenone

Last Answer : Benzaldehyde

Description : Whic of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc.? (1) Iron and cadmium (2) Nickel and cadmium (3) Lead peroxide and lead (4) Zinc and carbon

Last Answer : (2) Nickel and cadmium Explanation: A rechargeable battery, storage battery, or accumulator is a type of electrical battery. It comprises one or more electrochemical cells, and is a ... sizes, ranging from button cells to megawatt systems connected to stabilize an electrical distribution network.

Description : Which of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ? (1) Iron and cadmium (2) Nickel and cadmium (3) Lead peroxide and lead (4) Zinc and carbon

Last Answer : Nickel and cadmium

Description : Benzoyl chloride on basic-hydrolysis (NaOH/H2O) gives : (a) Benzoic acid (b) Methyl benzoate (c) Sodium benzoate (d) Ethyl benzoate

Last Answer : Sodium benzoate

Description : Which of the following would be most acidic? w) phenol x) methanol y) acetic acid z) methyl amine

Last Answer : ANSWER: C -- ACETIC ACID

Description : Members of which of the following classes of compounds generally produce acidic solutions when dissolved in water? w) metal oxides x) nonmetal oxides y) alcohols z) aldehydes

Last Answer : ANSWER: X -- NONMETAL OXIDES

Description : HCl is dissolved in solvent A; the solution is non-conducting towards an electric current. Solvent A must be: w) polar x) non-polar y) organic z) more acidic than HCl

Last Answer : ANSWER: X -- NON-POLAR

Description : Apart from all the over the counter creams you can buy do you know any remedies for cold sores?

Last Answer : Aloe Vera is what i think is the best thing , i would have thought Lemon would spread it rather than clear it

Description : Which one of these action is on an explosive hazard 9 line report?

Last Answer : Contact

Description : Fiber-optic cable cannot be used: a. in an explosive environment b. to connect a transmitter to an antenna c. to isolate a medical patient from a shock hazard d. none of the above

Last Answer : b. to connect a transmitter to an antenna

Description : Hi, I'm 26 and I'm struggling with acne. My dermatologist recommended me some preparations that I use + vitamins (zinc, selenium), but I do not seem to help me (after about 4-5 months of ... Could you recommend me some preparation for "oily / problematic skin? Thank you, nice rest of 2014!:) If

Last Answer : I would stop spending on expensive lotions and gels, and try to change my lifestyle. I know it's not always possible or easy, but less stress and more sports will really do its thing. Especially a ... woman, :) read this: http://www.bylinky.eu/prirodni-lecba- acne-inner-way-to-healthy-skin.html

Description : Do medicated acne facial cleansers have the same effect as medicated creams?

Last Answer : in my experience, no. i used various “medicated” face washes with little effect. Then the doctor prescribed a medicated, alcohol-based antibiotic, which you don’t wash off, and it worked much better. it was pretty cheap, too, about $14 US. talk to your doctor.

Description : Which of the following pair are vector quantities? w) time and space x) force and momentum y) energy and time z) momentum and mass e) mass

Last Answer : ANSWER: X -- FORCE and MOMENTUM 

Description : Which of the following quantities has the GREATEST influence on the overall efficiency of a conventional (Rankine cycle) electric generating station burning fossil fuels? w) steam temperature at the steam turbine ... pressure at the steam turbine inlet z) pounds of ash and sulfur per pound of fuel 

Last Answer : ANSWER: W -- STEAM TEMPERATURE AT THE STEAM TURBINE INLET 

Description : Which of the following is NOT one of the fundamental quantities in physics? w) time x) length y) weight z) mass

Last Answer : ANSWER: Y -- WEIGHT

Description : In the equation of a nuclear reaction, all but one of the following quantities are equal to each other on both sides of the equation. Which quantity is NOT conserved: w) the net electric charge x) the total mass-energy y) the number of protons z) the number of nucleons

Last Answer : ANSWER: Y -- THE NUMBER OF PROTONS

Description : In a collision, which of the following four quantities is always conserved? w) momentum x) kinetic energy y) torque z) moment of inertia

Last Answer : ANSWER: W -- MOMENTUM

Description : Very strongly acidic cations have pKa values -------. a.between11.5 – 14.0 b. between6.0-11.5 c. between1.0-6.0 d. below -4.0

Last Answer : d. below -4.0

Description : Which of the following is strongly-acidic cation? a.Ba2+ b. Ca2+ c.Ti4+ d. Na+

Last Answer : c.Ti4+

Description : Phenol is acidic because of (a) Resonance (b) Electromeric effect (c) Inductive effect (d) Peroxide effect

Last Answer : Resonance

Description : HClO3 is commonly named: w) hydrochloric acid x) chloric acid y) perchloric acid z) chlorous acid

Last Answer : ANSWER: X -- CHLORIC ACID 

Description : A pungent smelling gas X after being dried by concentrated `H_2SO_4` was dissolved in water to give strongly acidic solution. The gas also gives dense

Last Answer : A pungent smelling gas X after being dried by concentrated `H_2SO_4` was dissolved in water ... `CO_2` from the solution of sodium hydrogencarbonates.

Description : Capacitance grading of cable implies (a) use of dielectrics of different permeabilities (b) grading according to capacitance of cables per km length (c) cables using single dielectric in different ... introduced at different lengths to counter the effect of inductance (e) none of the above

Last Answer : (a) use of dielectrics of different permeabilities

Description : Which of the following instruments should never have their test leads connected directly to a wall outlet: w) ammeter x) voltmeter y) oscilloscope z) frequency counter

Last Answer : ANSWER: W -- AMMETER

Description : The photomultiplier tube in the scintillation counter multiplies one of the following. Does it multiply: w) scintillations x) electrons y) ions z) photons

Last Answer : ANSWER: X -- ELECTRONS