Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that :

Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that :
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Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The ... gas to form a cloud of chlorine gas.
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10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) Copper coin is kept immersed in silver nitrate solution for some time. What change will take place in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry

Description : 10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) ... in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry

Last Answer : (a) Carbonate ore: (i) Calcination: Carbonate ore is heated in limited supply of air and oxide is obtained, e.g. (b) Copper, being more reactive than silver will displace silver from silver nitrate ... and there will be deposition of silver on copper coin. The colour of solution will turn to blue.

Nickel made/clad equipments are suitable for handling (A) Ammonia (both aqueous & anhydrous) (B) Fruit juices, milk & its products and caustic soda solution (C) Nitric acid & hydrochloric acid (concentrated) (D) Sulphuric acid (concentrated)

Description : Nickel made/clad equipments are suitable for handling (A) Ammonia (both aqueous & anhydrous) (B) Fruit juices, milk & its products and caustic soda solution (C) Nitric acid & hydrochloric acid (concentrated) (D) Sulphuric acid (concentrated)

Last Answer : (B) Fruit juices, milk & its products and caustic soda solution

Containers made of high silicon cast iron (14% Si) are not suitable for the storage of (A) Acetic acid (B) Benzoic & boric acids (C) Phosphoric acid (95%) & sulphuric acid (95%) (D) Hydrochloric acid (concentrated)

Description : Containers made of high silicon cast iron (14% Si) are not suitable for the storage of (A) Acetic acid (B) Benzoic & boric acids (C) Phosphoric acid (95%) & sulphuric acid (95%) (D) Hydrochloric acid (concentrated)

Last Answer : (D) Hydrochloric acid (concentrated)

What happens when concentrated hydrochloric acid is poured into a test tube containing zinc granules?

Description : What happens when concentrated hydrochloric acid is poured into a test tube containing zinc granules?

Last Answer : Zinc reacts with concentrated hydrochloric acid vigorously forming and the chemicals spill out of the test tube.

Raschig ring made of porcelain cannot be used for treating concentrated (A) Hydrochloric acid (B) Nitric acid (C) Alkalis (D) Sulphuric acid

Description : Raschig ring made of porcelain cannot be used for treating concentrated (A) Hydrochloric acid (B) Nitric acid (C) Alkalis (D) Sulphuric acid

Last Answer : (C) Alkalis

The mixture of concentrated hydrochloric acid and concentrated nitric acid is called

Description : The mixture of concentrated hydrochloric acid and concentrated nitric acid is called

Last Answer : Aquaregia.

2 ml each of concentrated HCl, HNO3 and a mixture of concentrated hydrochloric acid and Concentrated nitric acid in the ratio of 3:1were taken in test tubes labelled as A, B and C, A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal dissolved in test tube C. The metal could be: A) Al B) Au C) Pt D) Cu

Description : 2 ml each of concentrated HCl, HNO3 and a mixture of concentrated hydrochloric acid and Concentrated nitric acid in the ratio of 3:1were taken in test tubes labelled as A, B and C, A small piece of metal was put in ... the metal dissolved in test tube C. The metal could be: A) Al B) Au C) Pt D) Cu

Last Answer : B) Au

What is the common name given to a mixture of three parts of concentrated hydrochloric acid and one part concentrated nitric acid?

Description : What is the common name given to a mixture of three parts of concentrated hydrochloric acid and one part concentrated nitric acid?  

Last Answer : ANSWER: AQUA REGIA

Aqua regia is: w) concentrated nitric acid x) a mixture of three parts of concentrated hydrochloric acid and one part concentrated nitric acid y) concentrated hydrochloric acid z) a mixture of sulfuric acid and hydrochloric acid

Description : Aqua regia is: w) concentrated nitric acid x) a mixture of three parts of concentrated hydrochloric acid and one part concentrated nitric acid y) concentrated hydrochloric acid z) a mixture of sulfuric acid and hydrochloric acid

Last Answer : ANSWER: X -- A MIXTURE OF THREE PARTS OF CONCENTRATED HYDROCHLORIC ACID AND ONE PART CONCENTRATED NITRIC ACID 

Oleum produces fumes of (A) SO2 (B) H2SO4 (C) SO3 (D) SO2 + H2SO4

Description : Oleum produces fumes of (A) SO2 (B) H2SO4 (C) SO3 (D) SO2 + H2SO4

Last Answer : (C) SO3

What happens if bone of frog is kept in dilute hydrochloric acid? (a) Will become flexible (b) Will turn black (c) Will break into pieces(d) Will shrink

Description : What happens if bone of frog is kept in dilute hydrochloric acid? (a) Will become flexible (b) Will turn black (c) Will break into pieces(d) Will shrink

Last Answer : (a) Will become flexible

The term 'brown air' is used for – (1) Acid fumes (2) Photochemical smog (3) Sulphurous smog (4) Industrial smog

Description : The term 'brown air' is used for – (1) Acid fumes (2) Photochemical smog (3) Sulphurous smog (4) Industrial smog

Last Answer : (2) Photochemical smog Explanation: Photochemical smog which is mainly composed of ozone (O3), Peroxyacetyl nitrate (PAN) and No., is also known as brown air where solar radiation is intense. In ... solar radiation or areas, smog formation is incomplete and the air is referred to as grey air.

The term ‘brown air’ is used for (1) Acid fumes (2) Photochemical smog (3) Sulphurous smog (4) Industrial smog

Description : The term ‘brown air’ is used for (1) Acid fumes (2) Photochemical smog (3) Sulphurous smog (4) Industrial smog

Last Answer : Photochemical smog

what body tissue produces pepsin and hydrochloric acid -Biology

Description : what body tissue produces pepsin and hydrochloric acid -Biology

Last Answer : answer:

what body tissue produces pepsin and hydrochloric acid -Biology

Description : what body tissue produces pepsin and hydrochloric acid -Biology

Last Answer : answer:

Leaching of phosphate rock by strong __________ acid produces phosphoric acid. (A) Sulphuric (B) Hydrochloric (C) Either (A) or (B) (D) Neither (A) nor (B)

Description : Leaching of phosphate rock by strong __________ acid produces phosphoric acid. (A) Sulphuric (B) Hydrochloric (C) Either (A) or (B) (D) Neither (A) nor (B)

Last Answer : (C) Either (A) or (B)

Reaction of __________ acid with phosphate rock produces superphosphates. (A) Hydrochloric (B) Sulphuric (C) Nitric (D) Phosphoric

Description : Reaction of __________ acid with phosphate rock produces superphosphates. (A) Hydrochloric (B) Sulphuric (C) Nitric (D) Phosphoric

Last Answer : (B) Sulphuric

concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What order of oxidising ability of halo

Description : concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What order of oxidising ability of halo

Last Answer : concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What ... gt l_(2) gt H_(2)SO_(4)`

An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Description : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Last Answer : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while ( ... . is used as a dehydrating agent D. All of these

An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Description : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Last Answer : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) ... with `BF_(3)` D. It can act as oxidising agent

An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Description : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Last Answer : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) ... three series of salts D. Both (B) and (C)

An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Description : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Last Answer : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while ( ... . is used as a dehydrating agent D. All of these

An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Description : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Last Answer : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) ... with `BF_(3)` D. It can act as oxidising agent

An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Description : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) is acidic (B) gives back dense white fumes of (A)

Last Answer : An inorganic iodide (A) on heating gives gases (B) and (C). (B) is neutral towards litmus while (C) ... three series of salts D. Both (B) and (C)

(4) Water drops in a dispersion medium of air Explanation: A colloid is a substance microscopically dispersed evenly throughout another substance. A colloidal system consists of two separate phases: a dispersed phase (or internal phase) and a continuous phase (or dispersion medium) in which the colloid is dispersed. A colloidal system may be solid, liquid, or gas. Cloud is a colloidal dispersion of Water drops in a dispersion medium of air.

Description : (4) Water drops in a dispersion medium of air Explanation: A colloid is a substance microscopically dispersed evenly throughout another substance. A colloidal system consists of two separate phases: a dispersed ... or gas. Cloud is a colloidal dispersion of Water drops in a dispersion medium of air.

Last Answer : Conduction band electrons have more mobility than holes because they – (1) are lighter (2) experience collision less frequently (3) have negative charge (4) need less energy to move them

Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called (A) Fumes (B) Mists (C) Smoke (D) Aerosols

Description : Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called (A) Fumes (B) Mists (C) Smoke (D) Aerosols

Last Answer : (D) Aerosols

Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a ‘particulate’? (A) Dust & mists(B) Smoke & fumes(C) Photochemical smog & soot(D) None of these

Description : Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a ‘particulate’? (A) Dust & mists (B) Smoke & fumes (C) Photochemical smog & soot (D) None of these

Last Answer : (D) None of these

Particulates (< 1 µm size) remaining suspended in air indefinitely and transported by wind currents are called (1) Mists (2) Fumes (3) Aerosols (4) Smoke

Description : Particulates (< 1 µm size) remaining suspended in air indefinitely and transported by wind currents are called (1) Mists (2) Fumes (3) Aerosols (4) Smoke

Last Answer : Aerosols

What is Cloud Foundry? A. A factory that produces cloud components B. An industry wide PaaS initiative C. VMware-led open source PaaS.

Description : What is Cloud Foundry? A. A factory that produces cloud components B. An industry wide PaaS initiative C. VMware-led open source PaaS.

Last Answer : VMware-led open source PaaS.

What is Cloud Foundry? A. A factory that produces cloud components. B. VMware-led open source PaaS. C. An industry wide PaaS initiative. D. VMware-led closed source PaaS.

Description : What is Cloud Foundry? A. A factory that produces cloud components. B. VMware-led open source PaaS. C. An industry wide PaaS initiative. D. VMware-led closed source PaaS.

Last Answer : VMware-led open source PaaS.

Which one of the following metals is immune to corrosion by air, water, hydrochloric acid and nitric acid; but is soluble in aqua regia? w) gold x) silver y) magnesium z) nickel

Description : Which one of the following metals is immune to corrosion by air, water, hydrochloric acid and nitric acid; but is soluble in aqua regia? w) gold x) silver y) magnesium z) nickel

Last Answer : ANSWER: W -- GOLD

In a bisexual flower, inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation. -Biology

Description : In a bisexual flower, inspite of the young stamens being removed artificially, the flower produces fruit. Provide a suitable explanation for the above situation. -Biology

Last Answer : Answer. Removal of stamens of a bisexual flower will not affect pollination of its intact pistil and formation of fruit. Cross-pollination has occurred leading to fertilisation.

(4) less soluble in blood than nitrogen at high pressure Explanation: Deep-sea divers have their oxygen supply mixed with helium in order to avoid the toxic nature of oxygen under extreme pressures. The Helium atom is much smaller than the Nitrogen molecule, has a smaller electron cloud and is less polarizable. It, therefore is less soluble in blood than nitrogen and prevents the formation of nitrogen bubbles in blood which blocks blood flow as the diver comes to the surface of the sea from underwater.

Description : (4) less soluble in blood than nitrogen at high pressure Explanation: Deep-sea divers have their oxygen supply mixed with helium in order to avoid the toxic nature of oxygen under extreme pressures. The ... blood which blocks blood flow as the diver comes to the surface of the sea from underwater.

Last Answer : The chemical bahaviour of an atom depends upon - (1) the number of protons in its nucleus (2) the number of neutrons in the nucleus (3) the number of electrons orbiting around the nucleus (4) the number of nucleons in the nucleus

Can exposure to fumes from cleaning products or chlorine affect IQ?

Description : Can exposure to fumes from cleaning products or chlorine affect IQ?

Last Answer : answer:I would worry more about your lungs and eyes. Bleach doesn’t rinse the brain cells out.

Accidently melted some rubber...are the fumes dangerous?

Description : Accidently melted some rubber...are the fumes dangerous?

Last Answer : Yes, but you’ve taken the right action. Keep them open for a bit. You’ll be fine

After painting and subsequent fumes, which would be better in terms of sleeping tonight?

Description : After painting and subsequent fumes, which would be better in terms of sleeping tonight?

Last Answer : At this time of year I would close the door on the fumey part of the house, and open the windows. The pollen is low at this time of year.

What do I do if I breathed in toxic fumes?

Description : What do I do if I breathed in toxic fumes?

Last Answer : Hospital. NOW.

Since diesel fumes are so smelly and bad for the environment and children, why are schoolbuses still diesel?

Description : Since diesel fumes are so smelly and bad for the environment and children, why are schoolbuses still diesel?

Last Answer : Newer buses run on compressed natural gas.

If I were to set you on fire, what would your fumes smell like?

Description : If I were to set you on fire, what would your fumes smell like?

Last Answer : answer:Oranges!!! Or the ocean… HAHAHHAA

How can I care for a Tony Aster tree that was hit by exhaust fumes for a whole day?

Description : How can I care for a Tony Aster tree that was hit by exhaust fumes for a whole day?

Last Answer : Need Answer

Are water based Paint fumes dangerous?

Description : Are water based Paint fumes dangerous?

Last Answer : Need answer

What is an opening allowing fumes to escape?

Description : What is an opening allowing fumes to escape?

Last Answer : Unplanned emissions of fumes are called fugitive emissions. They can be released from:uncontrolled ventilation (no treatment),leaking equipmentpoorly maintained seals,holes in equipment,staff work ... ,open doors and windowsproduct wetted walls of floating roof tanksopen ponds and treatment systems

Where should I place my generator to prevent poisoning from fumes?

Description : Where should I place my generator to prevent poisoning from fumes?

Last Answer : Your generator should be placed in a well ventilated area. Since you want to protect it from the weather the best idea is to get some flexible exhaust pipe and run the exhaust out of the building you keep it in. You should never use an unvented generator around people in an enclosed space.

What+is+a+good+self+cleaning+oven+and+are+they+safe%3F+Like+does+the+cleaning+process+give+off+fumes+I+should+worry+about%3F?

Description : What+is+a+good+self+cleaning+oven+and+are+they+safe%3F+Like+does+the+cleaning+process+give+off+fumes+I+should+worry+about%3F?

Last Answer : Whirlpool 5.3 cu. Ft. Self-Cleaning Oven is a good self-cleaning oven. They may produce fumes, but they can only harm the respiratory systems of birds being that they are very sensitive.

Is it permissable for indoor painting to be done while employees are present and inhaling the paint fumes?

Description : Is it permissable for indoor painting to be done while employees are present and inhaling the paint fumes?

Last Answer : I think it would do more harm not just to your employess but your customers the smell of any paint is strong enough to give you a headache

paint thinner spilled on garage floor, how to rid of fumes?

Description : paint thinner spilled on garage floor, how to rid of fumes?

Last Answer : You can use cat litter to soak up any excess paint thinner. Open all doors and windows, and use fans to help the thinner evaporate quicker.

How safe are propane generators with regard to fire and fumes?

Description : How safe are propane generators with regard to fire and fumes?

Last Answer : If you don't want a fire in your house I would not recommend using it much. You might use it for twice a week and it might be safe and you can get a fire alarm system if you don't have one in case of a fire

Can exhaust fumes kill you?

Description : Can exhaust fumes kill you?

Last Answer : Yes, they can. If your vehicle's exhaust system is faulty and leaks into the interior WHILE YOU ARE DRIVING IT down the road, you WILL become drowsy and possibly crash, possibly killing others as well ... s exhaust system is working properly - have a mechanic check out the exhaust system : Be Safe !

Give reasons: a) Phosphorous pentachloride is unstable. b) Phosphorous trichloride fumes in moisture.

Description : Give reasons: a) Phosphorous pentachloride is unstable. b) Phosphorous trichloride fumes in moisture.

Last Answer : Ans: a) Because of two longer axial bonds. b) Because it reacts with water and forms hydrochloric acid. 

Non-volatile heavy metals in kiln are fixed into ____ a) Clinker’s crystalline structure b) Fumes c) Solid lump d) Slag

Description : Non-volatile heavy metals in kiln are fixed into ____ a) Clinker’s crystalline structure b) Fumes c) Solid lump d) Slag

Last Answer : Clinker’s crystalline structure