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

1 Answer

Answer :

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

Related questions

Description : What happens when ethanol is heated with acidified potassium dichromate solution? Write the chemical equation.

Last Answer : Answer. Ethanol is oxidised to ethanoic acid with the help of acidified K2Cr2O7. CH3CH2OH + 2O → CH3COOH + H2O

Description : The oxidation state of chrominium in the final product formed in the reaction between `KI` and acidified potassium dichromate soluttion is

Last Answer : The oxidation state of chrominium in the final product formed in the reaction between `KI` and acidified potassium dichromate ... `+6` C. `+2` D. `+3`

Description : Thiamin is oxidized to thiochrome in alkaline solution by (A) Potassium permanganate (B) Potassium ferricyanide (C) Potassium chlorate (D) Potassium dichromate

Last Answer : Answer : B

Description : LCM of the given number ̳x‘ and ̳y‘ where y is a multiple of ̳x‘ is given by (a) x (b) y (c) xy (d) xy

Last Answer : (b) y

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 : To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of A. Hydrochloric acid B. Sulphuric acid C. Nitric acid D. Citric acid

Last Answer : ANS: B

Description : The reddish -brown gas formed when nitric oxide is oxidized by air is

Last Answer : The reddish -brown gas formed when nitric oxide is oxidized by air is A. `NO_(2)` B. `N_(2)O_(4)` C. `N_(2)O_(5)` D. `N_(2)O_(3)`

Description : The reddish -brown gas formed when nitric oxide is oxidized by air is

Last Answer : The reddish -brown gas formed when nitric oxide is oxidized by air is A. `NO_(2)` B. `N_(2)O_(4)` C. `N_(2)O_(5)` D. `N_(2)O_(3)`

Description : The chemical formula of iron pyrites is— (A) FeSO 4 (B) FeS (C) FeS 2 (D) Fe 2 (SO 4 ) 3

Last Answer : (C) FeS 2

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)`

Description : The acidic aqueous solution of ferrous ion forms a brown complex in the presence of `NO_(3)^(Θ)` by the follwing two steps: `[Fe(H_(2)O)_(6)]^(2+) +NO

Last Answer : The acidic aqueous solution of ferrous ion forms a brown complex in the presence of `NO_(3)^(Θ)` ... + H_(2)O` Complete and balance the equations .

Description : A compound 'X' of the formula `C_(3)H_(8)O` gives iodoform test. On oxidation with acidified `K_(2)Cr_(2)O_(7)X` gave Y. Y also gives iodogorm test. T

Last Answer : A compound 'X' of the formula `C_(3)H_(8)O` gives iodoform test. On oxidation with acidified `K_(2)Cr_(2) ... ` D. `CH_(3)COCH_(3), CH_(3)CHOHCH_(3)`

Description : Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction oxidation state of iron .

Last Answer : Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction ... . changes from +2 to +4 D. does not change.

Description : Componds `(A)` and `B` are treated with dilute `HCl` separately. The gases liberated are `Y` and `Z` respectively. `Y` turns acidified `K_2 Cr_2 O_7`

Last Answer : Componds `(A)` and `B` are treated with dilute `HCl` separately. The gases liberated are `Y` and `Z` ... )SO_(4)` D. `NaC1 and Na_(2)CO_(3)`

Description : A mixture of two organic compound gives red coloured precipitate with cuprous chloride and silver mirror on heating with Zn and `NH_(4)Cl` followed by

Last Answer : A mixture of two organic compound gives red coloured precipitate with cuprous chloride and silver mirror on heating ... mixture contains : A. B. C. D.

Description : Acetaldehyde on treatment with Fehling's solution gives a precipitate of (a) Cu (b) Cu2O (c) CuO (d) None of these

Last Answer : Cu2O

Description : CuO + H2 = Cu + H2O. This equation is an example of - (1) Oxidation (2) Decomposition (3) Reduction (4) Redox

Last Answer : (4) Redox

Description : Pick out the correct statement. (A) Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present in water (B) COD is determined by oxidising the organic matter present in water with potassium dichromate ... of potable water may be 1-2 mg/litre (D) All (A), (B) and (C)

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

Description : Which of the following is an electrolytic cell A. lron * (ll) * (Fe) oxidized, aluminum (Al) reduced O B. Silver (Ag) oxidized, gold (Au) reduced C. Aluminum () oxidized (Zn) reduced LithiumD. (Li) oxidized, (Zn) reduced?

Last Answer : The answer is not c.

Description : On immersing gold pins in CuSO 4 solution for few minutes, you will observe (a) displacement reaction (b) the colour of solution fades away (c) the surface of gold pins acquire a black coating (d) No change

Last Answer : (d) No change

Description : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` and `NH_(4)Cl` gives an octahedral complex Y in the pre

Last Answer : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` ... solution is pink D. Z is a tetrahedral complex.

Description : When the concentration of SO2 in air is greater than __________ ppm, it gives a pungent smell. (A) 0.01 (B) 0.1 (C) 1 (D) 4

Last Answer : (D) 4

Description : A colourless water-soluble compound on strong heating liberates a brown colored gas and leaves a yellow residue that turns white on cooling. An aqueou

Last Answer : A colourless water-soluble compound on strong heating liberates a brown colored gas and leaves a yellow residue that turns ... (3))_(3)` D. `NaNO_(3)`

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.

Description : Name the products of electrolytic decomposition of acidified water.

Last Answer : Hydrogen and oxygen

Description : Potassium acid oxalate `K_(2)C_(2)O_(4).3H_(2)C_(2)O_(4).4H_(2)O` can be oxidized by `MnO_(4)^(-)` in acid medium. Calculate the volume of (in mL) 1 M

Last Answer : Potassium acid oxalate `K_(2)C_(2)O_(4).3H_(2)C_(2)O_(4).4H_(2)O` can be oxidized by ... reacting in acid solution with 5.08 gram of the acid oxalate.

Description : The comple `[Fe(H_(2)O)_(6)NO]^(2+)` is formed in the brown ring test fro nitrates when freshly prepared `FesO_(4)` solution is added to aqueous solut

Last Answer : The comple `[Fe(H_(2)O)_(6)NO]^(2+)` is formed in the brown ring test fro nitrates when ... electrons is Fe. D. All the above are correct statement.

Description : In geological studies, arkose contains which of th following minerals which gives it a reddish color? w) orthoclase x) calcite y) aragonite (pron: a-rag-o-nite) z) quartz

Last Answer : ANSWER: W -- ORTHOCLASE

Description : An orgainc compound A upon reacting with `NH_(3)` gives `B` On heating `B` give `C.C` in presence `KOH` reacts with `Br_(2)` to yield `CH_(3)CH_(2)NH_

Last Answer : An orgainc compound A upon reacting with `NH_(3)` gives `B` On heating `B` give `C.C` in presence `KOH ... underset(|)(CH)-COOH` D. `CH_(3)CH_(2)COOH`

Description : The chemical formula for hydrated copper sulphate is – (a) CuSo4.2H 2 O (b) CuSo4.6H 2 O (c) CuSO 4 .4H 2 O (d) CuSO 4 .5H 2 O

Last Answer : (d) CuSO 4 .5H 2 O

Last Answer : : Chemical signal of potassium dichromate K2Cr2O7

Description : A 'breath test' used by traffic police to check drunken driving uses: (1) potassium dichromate-sulphuric acid (2) potassium permanganate-sulphuric acid (3) turmeric on filter paper (4) silica gel coated with silver nitrate

Last Answer : (1) potassium dichromatesulphuric acid Explanation: The main constituent of alcohol is Ethanol and the concentration of ethanol in a sample can be determined by back titration with acidified potassium ... contact with the yellow dichromate-coated crystals, the color changes from yellow to green.

Description : With respect to calibration of uv-vis spectrophotometer, which of the following material is used to evaluate the ‘control of absorbance’ A. Sodium thiosulphate B. Potassium dichromate C. Holmium oxide D. Potassium permanganate

Last Answer : B. Potassium dichromate

Description : What is the oxidation state of chromium in potassium dichromate?

Last Answer : ANSWER: +6 (or 6)

Description : A ‘breath test’ used by traffic police to check drunken driving uses: (1) potassium dichromate-sulphuric acid (2) potassium perma-nganatesulphuric acid (3) turmeric on filter paper (4) silica gel coated with silver nitrate

Last Answer : potassium dichromate-sulphuric acid

Description : In public urinals, the urine on standing gives a pungent smell, due to or State urine smells like ammonia because of

Last Answer : In public urinals, the urine on standing gives a pungent smell, due to or State urine smells like ... urea into ammonia by bacteria D. None of these

Description : Chlorine is used in swimming pools as a disinfecta In its natural, standard state it is a: w) blue liquid x) colorless crystals y) yellow-green gas z) reddish-brown gas

Last Answer : ANSWER: Y -- YELLOW-GREEN GAS

Description : Ammonium dichromate on heating liberates a gas. The same gas will be obtained by :

Last Answer : Ammonium dichromate on heating liberates a gas. The same gas will be obtained by : A. heating ` ... treating ammonia with `KMnO_(4)` in neutral medium

Description : Ammonium dichromate on heating liberates a gas. The same gas will be obtained by :

Last Answer : Ammonium dichromate on heating liberates a gas. The same gas will be obtained by : A. heating ` ... treating ammonia with `KMnO_(4)` in neutral medium

Description : What happens when a substance gains oxygen during reaction? The substance gets – (a) Oxidised (b) Reduced (c) Both oxidized and reduced (d) None of the above

Last Answer : (a) Oxidised

Description : A compound X with moleuclar formula `C_(3)H_(8)O` can be oxidized to a compoud Y with the molecular formula `C_(3)H_(6)O_(2)`. X is most likely to be

Last Answer : A compound X with moleuclar formula `C_(3)H_(8)O` can be oxidized to a compoud Y with the molecular ... Aldehye B. Alcohol C. Ether D. Both 2 and 3

Description : Which one of the following can be oxidized to the corresponding carbonyl compound - (1) O-Nitrophenol (2) Phenol (3) 2-methyl-2-hydroxy propane (4) 2-hydroxy propane

Last Answer : (4) 2-hydroxy propane

Description : Brass gets discolored in air because of the presence of which of the gases in the air? -Science

Last Answer : The answer is Hydrogen Sulphide.

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

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

Last Answer : Alkaline potassium permanganate

Description : Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate (A) Is prone to thermal decomposition (B) Has high water solubility and is unstable (C) Is soluble in ammonium chloride and potassium chloride solution (D) All (A), (B) and (C)

Last Answer : (C) Is soluble in ammonium chloride and potassium chloride solution

Description : Leakage in a cooking gas cylinder is detected by (A) Radio-isotopes (B) Pouring soap solution on the surface and locating the gas bubbles (C) Halide torch (D) Pungent smell of mercaptans present in the gas

Last Answer : Option D

Description : Which one of the following processes during decomposition is correctly described? (a) Catabolism - Last step in the decomposition under fully anaerobic condition (b) Leaching - Water soluble inorganic ... of a dark coloured substance humus which undergoes microbial action at a very fast rate.

Last Answer : (c) Fragmentation – Carried out by organisms such as earthworm

Description : Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal the hardness of water and a gas C is evolved. The gas C when passed through lime water ,turns it ... © A is baking soda ,B is washing soda and C is carbon dioxide (d) both a and c

Last Answer : (d) both a and c

Description : What happens when ethanol is oxidized by air in the presence of germs ?

Last Answer : Acetic acid is obtained when ethanol is oxidized by air in the presence of bacteria.