Assertion : Gold occurs in native state. Reason : Gold dissolves in aqua-regia.

Assertion : Gold occurs in native state. Reason : Gold dissolves in aqua-regia.
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Assertion : Gold occurs in native state. Reason : Gold dissolves in aqua-regia. A. Statement -1 is ... . Statement-1 is false but Statement -2 is true
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Gold dissolves in – (1) Hydrochloric acid (2) Nitric acid (3) Aqua-regia (4) Acetic acid

Description : Gold dissolves in – (1) Hydrochloric acid (2) Nitric acid (3) Aqua-regia (4) Acetic acid

Last Answer : (3) Aqua-regia Explanation: Aqua regia or nitro-hydrochloric acid is a highly corrosive mixture of acids, a fuming yellow or red solution. It was named so because it can dissolve the so-called royal or noble metals, gold and platinum.

Gold dissolves in (1) Hydrochloric acid (2) Nitric acid (3) Aqua-regia (4) Acetic acid

Description : Gold dissolves in (1) Hydrochloric acid (2) Nitric acid (3) Aqua-regia (4) Acetic acid

Last Answer : Aqua-regia

Platinum metal (Pt) dissolves in aqua-regia but not in concentrated HCl ot `HNO_(3)` because

Description : Platinum metal (Pt) dissolves in aqua-regia but not in concentrated HCl ot `HNO_(3)` because

Last Answer : Platinum metal (Pt) dissolves in aqua-regia but not in concentrated HCl ot `HNO_(3)` because A. HCl ... (3)` together give `O_(2)` that oxidises Pt

Platinum metal (Pt) dissolves in aqua-regia but not in concentrated HCl ot `HNO_(3)` because

Description : Platinum metal (Pt) dissolves in aqua-regia but not in concentrated HCl ot `HNO_(3)` because

Last Answer : Platinum metal (Pt) dissolves in aqua-regia but not in concentrated HCl ot `HNO_(3)` because A. HCl ... (3)` together give `O_(2)` that oxidises Pt

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

What does "aqua regia" mean ?

Description : What does "aqua regia" mean ?

Last Answer : " Aqua regia" refers to a mixture of concentrated hydrochloric acid and nitric acid.

What is aqua regia or royal acid ?

Description : What is aqua regia or royal acid ?

Last Answer : A mixture of one mole of concentrated nitric acid and three moles of concentrated hydrochloric acid is called Raj acid.

What is aqua regia or raj acid ?

Last Answer : : Nitric and hydrochloric acid in the ratio of 3: 1.

Aqua regia is a 1 : 3 mixture, by volume, of – (1) conc, nitric acid and conc. hydrochloric acid (2) conc. hydrochloric acid and conc. nitric acid (3) conc. nitric acid and cone. sulphuric acid (4) cone. sulphuric acid and cone. nitric acid

Description : Aqua regia is a 1 : 3 mixture, by volume, of – (1) conc, nitric acid and conc. hydrochloric acid (2) conc. hydrochloric acid and conc. nitric acid (3) conc. nitric acid and cone. sulphuric acid (4) cone. sulphuric acid and cone. nitric acid

Last Answer : (1) conc. nitric acid and conc. hydrochloric acid Explanation: Aqua regia or nitro-hydrochloric acid is a highly corrosive mixture of acids, a fuming yellow or red solution. The mixture is ... , tantalum, osmium, rhodium and a few other metals are capable of withstanding its corrosive properties.

Aqua regia is a Mixture of the following in the ratio 1:3 by volume–

Description : Aqua regia is a Mixture of the following in the ratio 1:3 by volume–

Last Answer : Conc HNO3 and conc CHL

What is meant by aqua regia?

Description : What is meant by aqua regia?

Last Answer : Mixture of concentrated nitric acid and hy- drochloric acid in the ratio 1:3

Write briefly (a)Allotropy (b) Nebula (c) Enrichment of Uranium (d) Aqua Regia (e) Greenhouse effect (f) Igneous rocks

Description : Write briefly (a)Allotropy (b) Nebula (c) Enrichment of Uranium (d) Aqua Regia (e) Greenhouse effect (f) Igneous rocks

Last Answer : (a)Allotropy existence of a chemical element in two or more different forms For example, the element carbon has two common allotropes: diamond, where the carbon atoms are bonded together in a ... igneous rocks have been described, most of them formed beneath the surface of the Earth's crust.

Write briefly about any five of the following a. Nuclear radiation b. Theodolite c. Dialysis d. Enrichment of Uranium e. Richter Scale f. Aqua regia g. Iodized salt

Description : Write briefly about any five of the following a. Nuclear radiation b. Theodolite c. Dialysis d. Enrichment of Uranium e. Richter Scale f. Aqua regia g. Iodized salt

Last Answer : a. Nuclear radiation Three are atomic nuclei of some elements that continuously emit some ultraviolet waves called radiation. When the process of radiation is stimulated through various nuclear processes ... , and at approximately the same level throughout the year, irrespective of economic level.

Aluminium storage vessel can be used to store (A) Aqua regia (B) Ferrous sulphate (C) Hydrochloric acid (10%) (D) None of these

Description : Aluminium storage vessel can be used to store (A) Aqua regia (B) Ferrous sulphate (C) Hydrochloric acid (10%) (D) None of these

Last Answer : (D) None of these

Rubber lined vessels are corroded by the action of (A) Aqua regia (B) Chloroform (C) Sulphuric acid (95%) (D) All (A), (B) and (C)

Description : Rubber lined vessels are corroded by the action of (A) Aqua regia (B) Chloroform (C) Sulphuric acid (95%) (D) All (A), (B) and (C)

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

Define any five of the following : Acoustics , Quartz , Cross Pollination , Allele , Optical Illusion , Ovulation , Aqua Regia

Description : Define any five of the following : Acoustics , Quartz , Cross Pollination , Allele , Optical Illusion , Ovulation , Aqua Regia

Last Answer : Acoustics : The science of sound dealing with the production, effects, and transmission of sound waves through various mediums. Includes the effects of reflection, refraction, diffraction, absorption, and ... ; it is just about one of the few substances that can dissolve gold and platinum.

Which of the following cannot be stored in glass bottle? A. Aqua regia B. HF (Answer) C. HCL D. HBr

Description : Which of the following cannot be stored in glass bottle? A. Aqua regia B. HF (Answer) C. HCL D. HBr

Last Answer : B. HF (Answer)

CaCl(OCl) is the chemical formula of (A) Hypo (B) Bleaching powder (C) Plaster of Paris (D) Aqua regia

Description : CaCl(OCl) is the chemical formula of (A) Hypo (B) Bleaching powder (C) Plaster of Paris (D) Aqua regia

Last Answer : (B) Bleaching powder

. Nitric acid is not used in the manufacture of (A) Detergents (B) Fertilisers (C) Aqua regia (D) Explosives

Description : . Nitric acid is not used in the manufacture of (A) Detergents (B) Fertilisers (C) Aqua regia (D) Explosives

Last Answer : (A) Detergents

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 

Aqua regia is a 1 : 3 mixture, by volume, of (1) conc. nitric acid and conc. hydrochloric acid (2) conc. hydrochloric acid and conc. nitric acid (3) conc. nitric acid and conc. sulphuric acid (4) conc. sulphuric acid and conc. nitric acid

Description : Aqua regia is a 1 : 3 mixture, by volume, of (1) conc. nitric acid and conc. hydrochloric acid (2) conc. hydrochloric acid and conc. nitric acid (3) conc. nitric acid and conc. sulphuric acid (4) conc. sulphuric acid and conc. nitric acid

Last Answer : conc. nitric acid and conc. hydrochloric acid

Give reason: Gold occurs in native form.

Description : Give reason: Gold occurs in native form.

Last Answer : Gold is low in the reactivity series. It is least reactive or unreactive. Hence gold is found in free state.

What is NOT true about the tenure of the Speaker of the Lok Sabha? (a) He is no longer a Speaker if he ceases to be a member of the Lok Sabha due to any reason (b) When the Lok Sabha dissolves, the Speaker vacates his position simultaneously (c) The Speaker is the head of the Lok Sabha and also its representative (d) When there's a deadlock in vote, the Speaker can cast his casting vote to break the deadlock

Description : What is NOT true about the tenure of the Speaker of the Lok Sabha? (a) He is no longer a Speaker if he ceases to be a member of the Lok Sabha due to any reason (b) When the Lok Sabha ... representative (d) When there's a deadlock in vote, the Speaker can cast his casting vote to break the deadlock

Last Answer : (b) When the Lok Sabha dissolves, the Speaker vacates his position simultaneously

Assertion (A) `:` Replication and transcription occur in the nucleus but translation occurs in the cytoplasm. Reason (R ) `:` m-RNA is transferred fro

Description : Assertion (A) `:` Replication and transcription occur in the nucleus but translation occurs in the cytoplasm. Reason (R ) `:` m-RNA is transferred fro

Last Answer : Assertion (A) `:` Replication and transcription occur in the nucleus but translation occurs in the ... D. If both assertion and reason are false.

Assertion : Normally monospermy occurs in most of animals . Reason : Vitelline membrane of ovum checks polyspermy .

Description : Assertion : Normally monospermy occurs in most of animals . Reason : Vitelline membrane of ovum checks polyspermy .

Last Answer : Assertion : Normally monospermy occurs in most of animals . Reason : Vitelline membrane of ovum checks ... D. If both Assertion & Reason are False.

Assertion : Regular cyclic menstruation is an indicator of normal reproductive phase . Reason : It occurs throughout the reproductive phase of normal

Description : Assertion : Regular cyclic menstruation is an indicator of normal reproductive phase . Reason : It occurs throughout the reproductive phase of normal

Last Answer : Assertion : Regular cyclic menstruation is an indicator of normal reproductive phase . Reason : It occurs ... D. If both Assertion & Reason are False.

Assertion : Ovulation occurs on the `14^(th)` day of menstrual cycle in a human female . Reason : The high level of estrogen is controlled 2 or 3 days

Description : Assertion : Ovulation occurs on the `14^(th)` day of menstrual cycle in a human female . Reason : The high level of estrogen is controlled 2 or 3 days

Last Answer : Assertion : Ovulation occurs on the `14^(th)` day of menstrual cycle in a human female . Reason : ... False . D. If both Assertion & Reason are False.

Assertion : In post natal life , oocyte development occurs in mature follicle Reason : After ovulation , Graafian follicle transforms in corpus luteum

Description : Assertion : In post natal life , oocyte development occurs in mature follicle Reason : After ovulation , Graafian follicle transforms in corpus luteum

Last Answer : Assertion : In post natal life , oocyte development occurs in mature follicle Reason : After ovulation , ... D. If both Assertion & Reason are False.

Assertion : - Blood in cockroach is colourless with no respiratory pigment. Reason : - Gasesous exchange occurs through diffusion in haemolymph.

Description : Assertion : - Blood in cockroach is colourless with no respiratory pigment. Reason : - Gasesous exchange occurs through diffusion in haemolymph.

Last Answer : Assertion : - Blood in cockroach is colourless with no respiratory pigment. Reason : - Gasesous exchange occurs through ... A. A B. B C. C D. D

Assertion : Replication of DNA not occurs during interkinesis. Reason : Divison of chromosomes takes place during meiosis-II.

Description : Assertion : Replication of DNA not occurs during interkinesis. Reason : Divison of chromosomes takes place during meiosis-II.

Last Answer : Assertion : Replication of DNA not occurs during interkinesis. Reason : Divison of chromosomes takes place ... . If both Assertion & Reason are false.

Which of the following trees change foliage colour during winter? a. Albizzia lebbek b. Delonix regia c. Sapium sebeferum d. Thuja orientalis

Description : Which of the following trees change foliage colour during winter? a. Albizzia lebbek b. Delonix regia c. Sapium sebeferum d. Thuja orientalis

Last Answer : Sapium sebeferum

Juglans Regia is the real name of what type of nut tree

Description : Juglans Regia is the real name of what type of nut tree

Last Answer : Walnut

Which element occurs in native state

Description : Which element occurs in native state

Last Answer : Which element occurs in native state A. I B. S C. P D. Mg

Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of NaCN in presence of air. Statement-2:This is an

Description : Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of NaCN in presence of air. Statement-2:This is an

Last Answer : Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of ... -1 is false but Statement -2 is true

Which of the following elements does not occur in nature as a native ore? w) silver x) gold y) platinum z) aluminum

Description : Which of the following elements does not occur in nature as a native ore? w) silver x) gold y) platinum z) aluminum

Last Answer : ANSWER: Z -- ALUMINUM

A metal that does NOT occur native in the earth is w) copper x) gold y) sodium z) silver

Description : A metal that does NOT occur native in the earth is w) copper x) gold y) sodium z) silver

Last Answer : ANSWER: Y -- SODIUM 

Are there any other Aqua Fill stations located near Pacifis Beach, CA?

Description : Are there any other Aqua Fill stations located near Pacifis Beach, CA?

Last Answer : Try calling them @ (800) 922–3005

Does anyone know where I might be able to take adult (don't laugh) aqua aerobics classes in Los Angeles?

Description : Does anyone know where I might be able to take adult (don't laugh) aqua aerobics classes in Los Angeles?

Last Answer : Have you tried your local YM/WCA or park district? Often they will have programs at a reasonable price.

Has anyone used an Aqua Globes?

Description : Has anyone used an Aqua Globes?

Last Answer : Just in case no one is able to give you a review, Amazon has a few listed.

Hi, does anyone know how to set the SONY XPERIE M4 AQUA so that the screen lights up when there are incoming sms, messages on the messenger, etc.? Thanks

Description : Hi, does anyone know how to set the SONY XPERIE M4 AQUA so that the screen lights up when there are incoming sms, messages on the messenger, etc.? Thanks

Last Answer : Need Answer

Nejde mi predna kamera na Sony M4 aqua :(

Description : Hello, when I turn on the camera I can't switch to the front camera. I also can't switch to the front camera or snapchat. Can't advise me how to handle this? I've only had this cell phone for a month ... Thanks for the advice.

Last Answer : Need Answer

The phone will not turn on. Sony M4 Aqua

Description : Hello, when I turn on my phone (Sony M4 Aqua) ... I see a screen with the words Sony (Xperia) it runs for a while, then it flashes (or turns off for + -4-5 seconds) and so it repeats to ... and cracked ... do you think that if I sent it to the complaint, they would send it back because of that?

Last Answer : You can send it for a complaint. The question is whether they will recognize her. You can't count on a broken display. He would only fix the financial compensation. If the error is somewhere else, maybe he'll fix it.

What do indigo mauve puce and aqua have in common?

Description : What do indigo mauve puce and aqua have in common?

Last Answer : Need answer

How much do omega Seamaster aqua terra watches cost?

Description : How much do omega Seamaster aqua terra watches cost?

Last Answer : Omega Seamaster Aqua Terra watches are a very pricey selection of watches. On average, they tend to cost about five thousand dollars. They can be bought on luxuryofwatches.com and other similar watch sites.

How much does it cost for aqua equipment?

Description : How much does it cost for aqua equipment?

Last Answer : You can buy aqua Fitness equipment from Amazon.com, and they range anywhere from 10 to 50 dollars depending on the style of equipment you choose. Amazon is a very reliable site with reasonable prices.

Aqua ammonia is used as refrigerant in the following type of refrigeration system (a) compression (b) direct (c) indirect (d) absorption

Description : Aqua ammonia is used as refrigerant in the following type of refrigeration system (a) compression (b) direct (c) indirect (d) absorption

Last Answer : Ans: d

When urine is passed out several -fold more than in a normal subject, the condition is referred to as (a) Diabetes mellitus (b) Diabetes insipidus (c) Diabetes aqua (d) Diabetes polydipsia

Description : When urine is passed out several -fold more than in a normal subject, the condition is referred to as (a) Diabetes mellitus (b) Diabetes insipidus (c) Diabetes aqua (d) Diabetes polydipsia

Last Answer : Ans:(c)

For the aquatic organisms, the source of food is – (1) Phytoplankton (2) Sea Weed (3) Aqua plankton (4) Zooplankton

Description : For the aquatic organisms, the source of food is – (1) Phytoplankton (2) Sea Weed (3) Aqua plankton (4) Zooplankton

Last Answer : (4) Zooplankton Explanation: Zooplankton are a type of heterotrophic plankton that range from microscopic organisms to large species, such as jellyfish.

One of the following is used to dissolve noble metals. That is – (1) Nitric acid (2) Hydrochloric acid (3) Sulphuric acid (4) Aqua ragia

Description : One of the following is used to dissolve noble metals. That is – (1) Nitric acid (2) Hydrochloric acid (3) Sulphuric acid (4) Aqua ragia

Last Answer : (4) Aqua ragia Explanation: Aqua regia ("royal water"), aqua aegis ("king's water"), or nitro-hydrochloric acid is a highly corrosive mixture of acids, a fuming yellow or red ... ruthenium, tantalum, osmium, rhodium and a few other metals are capable of withstanding its corrosive properties.

What is similarity and dissimilarity in aqua solution and solid aerosols?

Description : What is similarity and dissimilarity in aqua solution and solid aerosols?

Last Answer : Ans. Aqua Sols and solid aerosols both have solid as dispersed phase and have different dispersion medium. Aqua solution contain water and aerosol contain air as dispersion medium.