Which one of the following is used to restore the colour of old oilpaintings ? (1) Ozone (2) Hydrogen peroxide (3) Barium peroxide (4) Sodium peroxide

Which one of the following is used to restore the colour of old oilpaintings ? (1) Ozone (2) Hydrogen peroxide (3) Barium peroxide (4) Sodium peroxide
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Answer :

Hydrogen peroxide
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Which one of the following is used to restore the colour of old oil-paintings? (1) Ozone (2) Hydrogen peroxide (3) Barium peroxide (4) Sodium peroxide

Description : Which one of the following is used to restore the colour of old oil-paintings? (1) Ozone (2) Hydrogen peroxide (3) Barium peroxide (4) Sodium peroxide

Last Answer : (2) Hydrogen peroxide Explanation: Hydrogen peroxide (H2O2) is the simplest peroxide (a compound with an oxygenoxygen single bond). It is also a strong oxidizer. Hydrogen peroxide is a clear ... capacity of hydrogen peroxide is so strong that it is considered a highly reactive oxygen species.

The green colour seen in firework displays is due to the chloride salt of– (1) Sodium (2) Strontium (3) Barium (4) Calcium

Description : The green colour seen in firework displays is due to the chloride salt of– (1) Sodium (2) Strontium (3) Barium (4) Calcium

Last Answer : (3) Barium Explanation: The red, orange, yellow, green, blue and purple colors exploding in the night sky during a pyrotechnic festival are created by the use of metal salts. Barium chloride ... orange), sodium nitrate (yellow), barium chloride (green fireworks) and copper chloride (blue fireworks).

The green colour seen in firework displays is due to the chloride salt of : (1) Sodium (2) Strontium (3) Barium (4) Calcium

Description : The green colour seen in firework displays is due to the chloride salt of : (1) Sodium (2) Strontium (3) Barium (4) Calcium

Last Answer : Barium

Which one among the following is used as a moderator in nuclear reactors? (1) Ozone (2) Heavy hydrogen (3) Hydrogen peroxide (4) Heavy water

Description : Which one among the following is used as a moderator in nuclear reactors? (1) Ozone (2) Heavy hydrogen (3) Hydrogen peroxide (4) Heavy water

Last Answer : (4) Heavy water Explanation: A pressurized heavy-water reactor (PHWR) is a nuclear reactor, commonly using natural uranium as its fuel, that uses heavy water (deuterium oxide D2O) as its coolant and neutron moderator.

Which one among the following is-used as a moderator in nuclear reactors? (1) Ozone (2) Heavy hydrogen (3) Heavy water (4) Hydrogen peroxide

Description : Which one among the following is-used as a moderator in nuclear reactors? (1) Ozone (2) Heavy hydrogen (3) Heavy water (4) Hydrogen peroxide

Last Answer : (3) Heavy water Explanation: Heavy water is used in certain types of nuclear reactors, where it acts as a neutron moderator to slow down neutrons so that they are more likely to react with the fissile uranium-235 than with uranium238.

In laboratory preparation of H2O2 from hydrated barium peroxide with sulphuric acid , anhydrous barium peroxide is not used Why ?

Description : In laboratory preparation of H2O2 from hydrated barium peroxide with sulphuric acid , anhydrous barium peroxide is not used Why ?

Last Answer : Ans-Because it forms a protective layer of barium sulphate over anhydrous barium peroxide

A student took Sodium Sulphate solution in a test tube and added Barium Chloride solution to it. He observed that an insoluble substance has formed. The colour and molecular formula of the insoluble substance is (a) Grey, Ba2SO4 (b) Yellow, Ba(SO4)2, (c) White, BaSO4 (d) Pink, BaSO4,

Description : A student took Sodium Sulphate solution in a test tube and added Barium Chloride solution to it. He observed that an insoluble substance has formed. The colour and molecular formula of the insoluble substance is (a) Grey, Ba2SO4 (b) Yellow, Ba(SO4)2, (c) White, BaSO4 (d) Pink, BaSO4,

Last Answer : Answer: (c) White, BaSO4

What is true for hydrogen peroxide and ozone ?

Description : What is true for hydrogen peroxide and ozone ?

Last Answer : What is true for hydrogen peroxide and ozone ? A. `H_(2)O_(2)` acts as a ... is used in the manufacture of potassium permangnate from pyrolusite

Consider the following compounds : (i) sulpher dioxide (ii) hydrogen peroxide (iii) ozone Among these compounds, those which can act as bleaching agen

Description : Consider the following compounds : (i) sulpher dioxide (ii) hydrogen peroxide (iii) ozone Among these compounds, those which can act as bleaching agen

Last Answer : Consider the following compounds : (i) sulpher dioxide (ii) hydrogen peroxide (iii) ozone Among these compounds, those ... C. 1 and 2 D. 1, 2 and 3

What is true for hydrogen peroxide and ozone ?

Description : What is true for hydrogen peroxide and ozone ?

Last Answer : What is true for hydrogen peroxide and ozone ? A. `H_(2)O_(2)` acts as a ... is used in the manufacture of potassium permangnate from pyrolusite

Consider the following compounds : (i) sulpher dioxide (ii) hydrogen peroxide (iii) ozone Among these compounds, those which can act as bleaching agen

Description : Consider the following compounds : (i) sulpher dioxide (ii) hydrogen peroxide (iii) ozone Among these compounds, those which can act as bleaching agen

Last Answer : Consider the following compounds : (i) sulpher dioxide (ii) hydrogen peroxide (iii) ozone Among these compounds, those ... C. 1 and 2 D. 1, 2 and 3

Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen? (1) Nascent Hydrogen (2) Water (3) Hydrogen (4) Ozone

Description : Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen? (1) Nascent Hydrogen (2) Water (3) Hydrogen (4) Ozone

Last Answer : (2) Water Explanation: Hydrogen peroxide (H2O2) is a water molecule with an extra oxygen atom. It is very unstable and breaks down readily into water and a single oxygen molecule. So in nutshell, when Hydrogen peroxide readily loses active oxygen, Water is formed.

Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen? (1) Nascent Hydrogen (2) Water (3) Hydrogen (4) Ozone

Description : Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen? (1) Nascent Hydrogen (2) Water (3) Hydrogen (4) Ozone

Last Answer : Water

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

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.

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

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

Write the balanced equation for the following chemical reactions. (i) Hydrogen + Chlorine → Hydrogen chloride (ii) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride (iii) Sodium + Water → Sodium hydroxide + Hydrogen -Chemistry-10

Description : Write the balanced equation for the following chemical reactions. (i) Hydrogen + Chlorine → Hydrogen chloride (ii) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride (iii) Sodium + Water → Sodium hydroxide + Hydrogen -Chemistry-10

Last Answer : (i) H2 + Cl2 → 2HCl (ii) 3 BaCl2 + Al2(SO4)3 → BaSO4 + 2 AlCl3 (iii) 2Na + 2H2O → 2NaOH + H2↑

Setting time of cement increases by adding (A) Gypsum (B) Hydrogen peroxide (C) Calcium chloride (D) Sodium oxide

Description : Setting time of cement increases by adding (A) Gypsum (B) Hydrogen peroxide (C) Calcium chloride (D) Sodium oxide

Last Answer : Answer: Option A

What is the colour imparted to the flame by Calcium,Strantium and Barium?

Description : What is the colour imparted to the flame by Calcium,Strantium and Barium?

Last Answer : Ans Calcium, strontium and barium impart characteristic brick red, crimson and apple green colours respectively to the flame. In flame the electrons are excited to higher energy levels and when they drop back to the ground state, energy is emitted in the form of visible light.

Non-metallic character increases from (1) Magnesium to Barium (2) Potassium to Cesium (3) Oxygen to Selenium (4) Sodium to Chlorine

Description : Non-metallic character increases from (1) Magnesium to Barium (2) Potassium to Cesium (3) Oxygen to Selenium (4) Sodium to Chlorine

Last Answer : (4) Sodium to Chlorine Explanation: The elements which lose electrons to form cations are known as metals. Metallic character decreases across a period as we move from left to right.

Lime water turns milky when carbon dioxide is passed through it. It is due to the for mation of: (1) Calcium Carbonate (2) Barium Carbonate (3) Calcium Hydrogen Carbonate (4) Calcium Oxide

Description : Lime water turns milky when carbon dioxide is passed through it. It is due to the for mation of: (1) Calcium Carbonate (2) Barium Carbonate (3) Calcium Hydrogen Carbonate (4) Calcium Oxide

Last Answer : (1) Calcium Carbonate Explanation: When carbon dioxide is passed through lime water for a short time, it turns lime water milky due to formation of a white precipitate of calcium carbonate.

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

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

Before X-ray examination (coloured Xray) of the stomach, patients are given suitable salt of barium because. (1) barium is a good absorber of X-rays and helps stomach to appear clearly (2) barium salts are white in colour and this helps stomach to appear clearly (3) barium allows X-rays to pass through the stomach (4) barium salts are easily available

Description : Before X-ray examination (coloured Xray) of the stomach, patients are given suitable salt of barium because. (1) barium is a good absorber of X-rays and helps stomach to appear clearly (2) barium ... clearly (3) barium allows X-rays to pass through the stomach (4) barium salts are easily available

Last Answer : (1) barium is a good absorber of X-rays and helps stomach to appear clearly

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

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'.

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

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

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

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

Consider the following chemical reaction X + Barium chloride——–> Y + Sodium chloride (White ppt) (a) Identify ‘X’ and ‘Y’ (b) The type of reaction -Democratic 10th

Description : Consider the following chemical reaction X + Barium chloride——–> Y + Sodium chloride (White ppt) (a) Identify ‘X’ and ‘Y’ (b) The type of reaction -Democratic 10th

Last Answer : (a) ‘X’ is Na2SO4 and Y is BaSO4. (b) The type of reaction Na2SO4 + BaCl2—–> BaSO4 + 2NaCl (White ppt) The reaction is a precipitation reaction. It is also called a double displacement reaction.

A student prepares aqueous solutions of the following salts: Copper sulphate, ferrous sulphate, sodium sulphate and barium chloride. Write the color of each solution thus formed?

Description : A student prepares aqueous solutions of the following salts: Copper sulphate, ferrous sulphate, sodium sulphate and barium chloride. Write the color of each solution thus formed?

Last Answer : Answer. Copper sulphate (aq) – blue in color Ferrous sulphate (aq) – pale green in color Sodium sulphate (aq) – colorless Barium chloride (aq) – white in color

Why does hydrogen peroxide bubble on a wound?

Description : Why does hydrogen peroxide bubble on a wound?

Last Answer : because it’s really flesh eating bacteria

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

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.

Which among the following is a carbohydrate? (1) Nylon (2) Cane-sugar (3) Turpentine (4) Hydrogen peroxide

Description : Which among the following is a carbohydrate? (1) Nylon (2) Cane-sugar (3) Turpentine (4) Hydrogen peroxide

Last Answer : (2) Cane-sugar Explanation: Cane-sugar is carbohydrate and as this name implies, is composed of carbon, hydrogen and oxygen. it is a source of extracting sugar. There are various ... sugar most customarily used as food is sucrose, a disaccharide. Other disaccharides include maltose and lactose.

Describe the following in brief a)Hydrogen economy b) Fuel cell c) Uses of Hydrogen peroxide

Description : Describe the following in brief a)Hydrogen economy b) Fuel cell c) Uses of Hydrogen peroxide

Last Answer : Ans a) The storage and transportation of liquid hydrogen as a fuel is hydrogen economy b)Those cells in which the energy of combustion is converted into electricity are called fuel cells e g-H2-O2 fuel cell c)In bleaching, as antiseptic ,as oxidizing and reducing agent.

Why hydrogen peroxide is kept in wax lined glass or plastic vessels in dark?

Description : Why hydrogen peroxide is kept in wax lined glass or plastic vessels in dark?

Last Answer : Ans-In the presence of metal surfaces or traces of alkali (present in glass containers), the above reaction is catalyzed. It is, therefore, stored in wax-lined glass or plastic vessels in ... a stabilizer. It is kept away from dust because dust can induce explosive decomposition of the compound.

Explain the disproportionation nature of decomposition of Hydrogen peroxide?

Description : Explain the disproportionation nature of decomposition of Hydrogen peroxide?

Last Answer : Ans. Decomposition of hydrogen peroxide produces water and oxygen. O.N Increases as well as decreases.

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

Description : 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

Last Answer : ANSWER: W -- EXPLOSIVE

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

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

Bayer’s reagent is (1) Alkaline potassium permanganate (2) Acidified potassium permanganate (3) Hydrogen peroxide (4) Bromine water

Description : Bayer’s reagent is (1) Alkaline potassium permanganate (2) Acidified potassium permanganate (3) Hydrogen peroxide (4) Bromine water

Last Answer : Alkaline potassium permanganate

Which among the following is a carbohydrate ? (1) Nylon (2) Cane-sugar (3) Turpentine (4) Hydrogen peroxide

Description : Which among the following is a carbohydrate ? (1) Nylon (2) Cane-sugar (3) Turpentine (4) Hydrogen peroxide

Last Answer : Cane-sugar 

Is sodium peroxide a base?

Description : Is sodium peroxide a base?

Last Answer : Sodium peroxide is a basic oxide, not a base.

From the standpoint of safety, you should never allow salt water to enter a leadacid storage battery or come in contact with sulfuric acid because ______________. A. the resulting gas is extremely flammable B. the resulting gas is a respiratory irritant that can be fatal C. the primary constituent, sodium, reacts lethally with lead peroxide D. combining salt water with lead-acid creates an invisible gas resulting in severe corrosion

Description : From the standpoint of safety, you should never allow salt water to enter a leadacid storage battery or come in contact with sulfuric acid because ______________. A. the resulting gas is ... peroxide D. combining salt water with lead-acid creates an invisible gas resulting in severe corrosion

Last Answer : Answer: B

What does air bags, used for safety of car driver contain? 1.sodium bicarbonate. 2.sodium azide 3.sodium nitrate 4.sodium peroxide

Description : What does air bags, used for safety of car driver contain? 1.sodium bicarbonate. 2.sodium azide 3.sodium nitrate 4.sodium peroxide

Last Answer : 2.sodium azide

What does airbag, used for safety of car driver, contain? A. Sodium bicarbonate B. Sodium azide C. Sodium nitrite D. Sodium peroxide

Description : What does airbag, used for safety of car driver, contain? A. Sodium bicarbonate B. Sodium azide C. Sodium nitrite D. Sodium peroxide

Last Answer : B. Sodium azide

What kinds of problems have you had with hydrogen peroxide?

Description : What kinds of problems have you had with hydrogen peroxide?

Last Answer : Never any problems with it. But I only use it once when I have an injury, to clean and disinfect immediately after the wound occurs. In other words, it is a first responder' sort of chemical. ... from being infected. Summary: Don't use Hydrogen Peroxide to excess. Once and that's all. No problem.

Will hydrogen peroxide kill all flu germs?

Description : Will hydrogen peroxide kill all flu germs?

Last Answer : I’m not a doctor, but I think it should be fine. I do things like that with rubbing alcohol. Plus, you’ve been around that virus all week, so you really shouldn’t worry in my opinion.

Is Hydrogen Peroxide bad for your teeth?

Description : Is Hydrogen Peroxide bad for your teeth?

Last Answer : No, it’s not harmful to your teeth. In fact, hydrogen peroxide is a common ingredient in tooth whitening kits and may already be in your toothpaste.

Could a really hot surface (~ 500 degrees F) cause hydrogen peroxide to break down the same way that ultraviolet light does?

Description : Could a really hot surface (~ 500 degrees F) cause hydrogen peroxide to break down the same way that ultraviolet light does?

Last Answer : Its boiling point is 150 °C or 302 °F so it would cause it to boil away to vapour pretty quickly.

Does hydrogen peroxide damage your hair at all?

Description : Does hydrogen peroxide damage your hair at all?

Last Answer : I’m not sure I would try it…

Does using hydrogen peroxide do lighten your eyebrows actually work?

Description : Does using hydrogen peroxide do lighten your eyebrows actually work?

Last Answer : Peroxide may turn them red, so I would be afraid to use it. My hairdresser has told me they are not allowed by law to dye eyebrows as it is too close to the eyes, so I’m not sure what you could use. Are you doing it yourself or going to a salon to have your hair bleached?

Why doesn't hydrogen peroxide feel warm when it is put on a cut?

Description : Why doesn't hydrogen peroxide feel warm when it is put on a cut?

Last Answer : The amount of energy releases is the determining factor if you feel heat. For example, moss decomposing a rock has an exothermic reaction occurring, just not very fast and not releasing a lot of ... catalase in your blood cells and just breaking down into oxygen and bubbling up through the liquid.

Why does hydrogen peroxide decompose so quickly when applied to a cut?

Description : Why does hydrogen peroxide decompose so quickly when applied to a cut?

Last Answer : You really like these homework related questions, dontcha?

How to use hydrogen peroxide for cleaning

Description : How to use hydrogen peroxide for cleaning

Last Answer : Need Answer