Is a copper turns green when exposed to the environment a chemical change?

Is a copper turns green when exposed to the environment a chemical change?
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Chemical because it is being exposed to another compound andforming a new substance
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Copper substances when exposed to air gains a green coating due to the formation of: (1) CuO (2) CuCO3 Cu(OH)2 (3) CuSO4 (4) Cu(NO3)2

Description : Copper substances when exposed to air gains a green coating due to the formation of: (1) CuO (2) CuCO3 Cu(OH)2 (3) CuSO4 (4) Cu(NO3)2

Last Answer : (2) CuCO3 Cu(OH)2 Explanation: When copper is exposed to air, it reacts with moist carbon dioxide in the air and slowly loses its shiny brown surface and gains a green coat. This green substance is ... Cu(OH)2). The formation of this green coating on the surface of a copper object corrodes it.

A metal is exposed to the atmosphere for some time. It becomes coated with green carbonate. The metal must be – (1) silver (2) copper (3) aluminium (4) zinc

Description : A metal is exposed to the atmosphere for some time. It becomes coated with green carbonate. The metal must be – (1) silver (2) copper (3) aluminium (4) zinc

Last Answer : (2) copper Explanation: Copper forms a rich variety of compounds with oxidation states +1 and +2, which are often called cuprous and cupric, respectively. It does not react with water, but it ... contrast to the oxidation of iron by wet air, this oxide layer stops the further, bulk corrosion.

A metal is exposed to the atmosphere for sometime. It becomes coated with green carbonate. The metal must be (1) silver (2) copper (3) aluminium(4) zinc

Description : A metal is exposed to the atmosphere for sometime. It becomes coated with green carbonate. The metal must be (1) silver (2) copper (3) aluminium(4) zinc

Last Answer : copper

How much extra radiation am I exposed to if I stick my hand in the microwave right after it turns off? -Physics

Description : How much extra radiation am I exposed to if I stick my hand in the microwave right after it turns off? -Physics

Last Answer : You are actually exposed to less radiation if you stick your hand in a properly functioning microwave oven right after it turns off. First of all, the microwaves emitted by a microwave oven are not ... the radiation you are exposed to is so low-energy that there is nothing to be concerned about.

Is a copper statue turning green a chemical change or physical?

Description : Is a copper statue turning green a chemical change or physical?

Last Answer : chemical

Is a copper statue turning green a chemical change or physical?

Description : Is a copper statue turning green a chemical change or physical?

Last Answer : chemical

A man exposed to excessive noise level in the working environment may suffer from (A) Hearing loss (B) Rupture of ear drum (C) Nervousness & fatigue (D) All (A), (B) & (C)

Description : A man exposed to excessive noise level in the working environment may suffer from (A) Hearing loss (B) Rupture of ear drum (C) Nervousness & fatigue (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Organ systems which are exposed to external environment are protected from bacteria by presence of ___________. a)mucus membrane b)HCl c)hairs d)plug

Description : Organ systems which are exposed to external environment are protected from bacteria by presence of ___________. a)mucus membrane b)HCl c)hairs d)plug

Last Answer : a)mucus membrane

Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at 35°C (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C (C) Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C (D) A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

Description : Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at ... flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

Last Answer : (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C

An aluminium strip is kept immersed in a freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that a) Green solution slowly turns brown b) Lower end of the test tube becomes slightly warm c)A colourless gas with smell of burning sulphur is evolved c)Light green solution changes to blue

Description : An aluminium strip is kept immersed in a freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that a) Green solution slowly turns brown b) Lower end of the test ... c)A colourless gas with smell of burning sulphur is evolved c)Light green solution changes to blue

Last Answer : a) Green solution slowly turns brown

What would most be likely happen if green plant were exposed to longer days in sunlight?

Description : What would most be likely happen if green plant were exposed to longer days in sunlight?

Last Answer : what would most be likely happen if green plant were exposed to longer days in sunlight

Potato tubers become green if a. Exposed to light b. Attacked by insect c. Infected d. None of these

Description : Potato tubers become green if a. Exposed to light b. Attacked by insect c. Infected d. None of these

Last Answer : Exposed to light

What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows? (a) Light stimulates plant cells on the lighted side to grow faster. (b) Auxin accumulates on the shaded side, stimulating greater cell elongation there. (c) Green plants need light to perform photosynthesis. (d) Green plants seek light because they are phototropic.

Description : What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows? (a) Light stimulates plant cells on the lighted side to grow ... Green plants need light to perform photosynthesis. (d) Green plants seek light because they are phototropic.

Last Answer : (b) Auxin accumulates on the shaded side, stimulating greater cell elongation there

A student has been collecting silver coins and copper coins. One day she observes a black coating on silver coins and a green coating on copper coins. Which chemical phenomenon is responsible for these coatings? Write the names of black and green coatings.

Description : A student has been collecting silver coins and copper coins. One day she observes a black coating on silver coins and a green coating on copper coins. Which chemical phenomenon is responsible for these coatings? Write the names of black and green coatings.

Last Answer : The phenomenon is called corrosion. Silver gets tarnished when exposed to atmosphere which forms a black coating of silver oxide. Copper forms a green deposit on its surface when exposed to moist air. The green coating is copper sulphate.

21.The ordinary two winding transformer's primary and secondary windings always have A. different no of turns B. same size of copper wire C. a common magnetic circuit D. separate magnetic circuits

Description : 21.The ordinary two winding transformer's primary and secondary windings always have A. different no of turns B. same size of copper wire C. a common magnetic circuit D. separate magnetic circuits

Last Answer : C. A common magnetic circuit

When food is exposed to air it can lose electrons. This loss of electrons creates reactive molecules that work to destroy the chemical bonds in the food causing it to spoil. what are these reactive molecules called?

Description : When food is exposed to air it can lose electrons. This loss of electrons creates reactive molecules that work to destroy the chemical bonds in the food causing it to spoil. what are these reactive molecules called?

Last Answer : Free radicals

The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels. (A) 60(B) 90 (C) 105 (D) 120

Description : The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels. (A) 60 (B) 90 (C) 105 (D) 120

Last Answer : (B) 90

TCDD (2,3,6,7-tetrachlorodibenzo(p)dioxin) is a toxic synthetic chemical. The most consistent adverse effect observed in exposed humans is: w) liver cancer x) birth defects y) disfiguring skin eruption z) an exaggerated sense of well-being

Description : TCDD (2,3,6,7-tetrachlorodibenzo(p)dioxin) is a toxic synthetic chemical. The most consistent adverse effect observed in exposed humans is: w) liver cancer x) birth defects y) disfiguring skin eruption z) an exaggerated sense of well-being

Last Answer : ANSWER: Y -- DISFIGURING SKIN ERUPTION (CHLORACNE) 

Should emergency vehicles have a device that turns all lights green?

Description : Should emergency vehicles have a device that turns all lights green?

Last Answer : Things are bad enough with the noise and flashing lights. When I was a boy, my city ran an experiment, wherein they allowed specific kids of the school safety patrols to control the traffic signals at some busy intersections. The experiment lasted nearly 3 days.

green plant with large heart shaped leaves,small yellow blooms and seed pod that turns black as it dries

Description : green plant with large heart shaped leaves,small yellow blooms and seed pod that turns black as it dries

Last Answer : Need Answer

A gas turns lime water milky and acidified `K_(2)Cr_(2)O_(7)` solution green then gas is :

Description : A gas turns lime water milky and acidified `K_(2)Cr_(2)O_(7)` solution green then gas is :

Last Answer : A gas turns lime water milky and acidified `K_(2)Cr_(2)O_(7)` solution green then gas is : A. `HCl` B. `H_(2)S` C. `SO_(2)` D. `CO_(2)`

A green coloured solid compound ̳X‘, gets oxidized to reddish brown solid in presence of air. ̳X‘ on heating gives brown coloured solid ̳Y‘ and two pungent smelling gases ̳A‘ and ̳B‘. ̳A‘ turns acidified potassium dichromate solution green. Name ̳X‘, ̳Y‘, ̳A‘ , ̳B‘ and type of Reaction. (a) CuSO 4 , CuO, SO 2 , SO 3 , decomposition (b) FeSO 4 , Fe, SO 2 , SO 3 , decomposition (c) FeSO 4 , Fe 2 O 3, SO 2 , SO 3 , decomposition (d) FeSO 4 , Fe 2 O 3 , SO 3 , SO 2 , decomposition

Description : A green coloured solid compound ̳X , gets oxidized to reddish brown solid in presence of air. ̳X on heating gives brown coloured solid ̳Y and two pungent smelling gases ̳A and ̳B . ̳A turns acidified potassium ... , SO 3 , decomposition (d) FeSO 4 , Fe 2 O 3 , SO 3 , SO 2 , decomposition

Last Answer : (c) FeSO 4 , Fe 2 O 3, SO 2 , SO 3 , decomposition

When black copper oxide placed in a beaker is treated with dilute HCl, its colour changes to......... a) Whiteb) Red c) Blue-green d) No change

Description : When black copper oxide placed in a beaker is treated with dilute HCl, its colour changes to......... a) Whiteb) Red c) Blue-green d) No change

Last Answer : c) Blue-green

Copper sulphate crystals when heated strongly, lose their water of crystallization to give anhydrous copper sulphate accompanied by a change in color from: (a). Blue to green (b). Blue to white (c). Blue to sky blue (d). Blue to grey

Description : Copper sulphate crystals when heated strongly, lose their water of crystallization to give anhydrous copper sulphate accompanied by a change in color from: (a). Blue to green (b). Blue to white (c). Blue to sky blue (d). Blue to grey

Last Answer : (b). Blue to white

Paper turns yellowish with age due to the presence of the chemical

Description : Paper turns yellowish with age due to the presence of the chemical

Last Answer : lignin.

An undesirable change in the physical, chemical and biological characteristics of the environment is called

Description : An undesirable change in the physical, chemical and biological characteristics of the environment is called

Last Answer : pollution.

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.

Is copper one pounded into sheets is a chemical or physical change?

Description : Is copper one pounded into sheets is a chemical or physical change?

Last Answer : This is a physical change.

High content copper amalgam . . . a. generally requires greater energy to accomplish trituration b. should be placed rapidly in large increments c. Continues to leak since the corrosion products do not form d. does not cause galvanism in oral environment e. is equally effective as conventional alloys in clinical studies

Description : High content copper amalgam . . . a. generally requires greater energy to accomplish trituration b. should be placed rapidly in large increments c. Continues to leak since the ... not cause galvanism in oral environment e. is equally effective as conventional alloys in clinical studies

Last Answer : a. generally requires greater energy to accomplish trituration

A metal ‘X’ acquires a green colour coating on its surface on exposure to air. (i) Identify the metal ‘X’ and name the process responsible for this change. (ii)Name and write chemical formula of the green coating formed on the metal. (iii) List two important methods to prevent the process. -Chemistry

Description : A metal X' acquires a green colour coating on its surface on exposure to air. (i) Identify the metal X' and name the process responsible for this change. (ii)Name and write chemical ... the green coating formed on the metal. (iii) List two important methods to prevent the process. -Chemistry

Last Answer : (i) Metal is copper. The process is corrosion. (ii)Basic copper carbonate [CuCO3.Cu(0H)2]. (iii) • It should be coated with tin • It should be mixed with other metals to form alloys.

When A bronze statue develops a green coating (patina) over time is physical change or chemical?

Description : When A bronze statue develops a green coating (patina) over time is physical change or chemical?

Last Answer : This is a chemical change.

An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change ? -SST 10th

Description : An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change ? -SST 10th

Last Answer : D - The aqueous solution is a base as it turns red litmus solution blue. An acidic solution such as hydrochloric acid would reverse the change. In contrast, hydrochloric acid would turn blue ... not be able to reverse the change. These substances would only change red litmus solution to blue.

When water is heated it turns into water vapor ' What kind of change is it ?

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Last Answer : When water is heated it turns into water vapor ' This is a physical change.

When number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes? (1) Nine times (2) Three times (3) Six times (4) One-third

Description : When number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes? (1) Nine times (2) Three times (3) Six times (4) One-third

Last Answer : (1) Nine times

An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change? (a) Baking powder (b) Lime (c) Ammonium hydroxide solution (d) Hydrochloric acid

Description : An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change? (a) Baking powder (b) Lime (c) Ammonium hydroxide solution (d) Hydrochloric acid

Last Answer : (d) Hydrochloric acid

When number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes? (1) Nine times (2) Three times (3) Six times (4) One–third

Description : When number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes? (1) Nine times (2) Three times (3) Six times (4) One–third

Last Answer : Nine times

What are you doing to 'go green', i.e. possibly help the environment?

Description : What are you doing to 'go green', i.e. possibly help the environment?

Last Answer : Every other thursday I leave the cars in the garage & the butler gives me a piggy back ride around town.

Does "Green" mean that it is good for the environment or that it is politically correct in some circles?

Description : Does "Green" mean that it is good for the environment or that it is politically correct in some circles?

Last Answer : Green may mean that it is good for the environment (the most frequent usage I am aware of), or as a label for something that someone hopes will be perceived to be good for the environment (eg. green ... be good for the environment whether or not it is, is another question. Or, that it wasn't red

The Ministry sometimes referred to as "Green Ministry" in India is Ministry of- (1) Agriculture and Rural Development (2) Environment and Forests (3) Surface and Transport (4) Urban Development and Landscaping

Description : The Ministry sometimes referred to as "Green Ministry" in India is Ministry of- (1) Agriculture and Rural Development (2) Environment and Forests (3) Surface and Transport (4) Urban Development and Landscaping

Last Answer : (2) Environment and Forests Explanation : The Union Ministry of Environment and Forests is also known as 'Green Ministry' as it is responsible for planning, promoting, coordinating, and ... land degradation mitigation. It is responsible for the administration of the national parks of India.

C) Doha Bank Explanation: A Qatar-based Indian banker has been awarded for his contribution in environment friendly activities and for promoting green economy for nearly two decades. R Seetharaman, Group CEO of Doha Bank, was honoured with the ‗Green Economy Visionary award‘ at the 2016 Union of Arab Banks International Banking Summit held in Rome.

Description : C) Doha Bank Explanation: A Qatar-based Indian banker has been awarded for his contribution in environment friendly activities and for promoting green economy for nearly two decades. R Seetharaman, ... Visionary award at the 2016 Union of Arab Banks International Banking Summit held in Rome.

Last Answer : The Department of Posts launched a logo and tagline design contest for its soon-tobe set up India Post Payments Bank on which of the following website? A) GovPost B) IndianPost C) MyGov D) PayPost E) None of these

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Last Answer : C. both a & b

All of the following are social responsibility issues related to the environment, or green marketing, EXCEPT; A)water pollution. B)air pollution. C)conservation. D)land pollution. E)safety and health.

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Last Answer : E)safety and health.

----- refers to the development, pricing, promotion and distribution of products that do not harm the environment. A)Marketing ethics B)Social responsibility C)Environmental marketing D)Green marketing

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Last Answer : D)Green marketing

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Blister copper is refined by stirring moltem impure metal with green logs of wood because such a wood liberated hydrocarbon gases like `(CH_(4))`. The

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Last Answer : Blister copper is refined by stirring moltem impure metal with green logs of wood because such a wood ... poling, Y=CuO D. X=cupellation, Y=CuO

The richest source of copper is (A) Liver (B) Milk (C) Legumes (D) Green leafy vegetables

Description : The richest source of copper is (A) Liver (B) Milk (C) Legumes (D) Green leafy vegetables

Last Answer : Answer : A

In a flame test, the presence of copper in a solution is evident by what color flame? Is the flame w) red x) orange y) indigo z) blue-green

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Last Answer : ANSWER: Z -- BLUE-GREEN

The Statue of Liberty is green because of: w) green stone x) oxidized brass y) steel painted green z) oxidized copper

Description : The Statue of Liberty is green because of: w) green stone x) oxidized brass y) steel painted green z) oxidized copper

Last Answer : ANSWER: Z -- OXIDIZED COPPER