When a metal sulphate is heated in dry test tube, the colour changes from blue to white. Then metal sulphate may be :

When a metal sulphate is heated in dry test tube, the colour changes from blue to white. Then metal sulphate may be :
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When a metal sulphate is heated in dry test tube, the colour changes from blue to white. Then metal sulphate may ... . `Na_(2)SO_(4)` D. None of these
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List any two observations when Ferrous Sulphate is heated in a dry test tube? -Science

Description : List any two observations when Ferrous Sulphate is heated in a dry test tube? -Science

Last Answer : Two Observations Are: 1) Change in colour of crystals from green to white. 2) Evolution of gas. The gases evolved are SO2 and SO3.

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

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

2g of ferrous sulphate crystals are heated in a dry boiling tube. (i) List any two observations. (ii) Name the type of chemical reaction taking place. (iii) ‘Write the chemical equation for the reaction. -Chemistry

Description : 2g of ferrous sulphate crystals are heated in a dry boiling tube. (i) List any two observations. (ii) Name the type of chemical reaction taking place. (iii) ‘Write the chemical equation for the reaction. -Chemistry

Last Answer : Answer. (i) •Green colour of Fe SO4 disappears and reddish brown solid is formed. • Smell of burning sulphur. (ii) Decomposition reaction

Above image shows an experiment where copper sulphate crystals are heated. When we heat the crystals, they turn white. If you moisten the crystals again with water you will find that colour of crystals reappears . (1) How many water molecules are present in one formula unit of copper sulphate (a)5 (b)2 (c)6 (d)7

Description : Above image shows an experiment where copper sulphate crystals are heated. When we heat the crystals, they turn white. If you moisten the crystals again with water you will find that colour of crystals reappears . (1 ... are present in one formula unit of copper sulphate (a)5 (b)2 (c)6 (d)7

Last Answer : (a)5

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

Write two precautions that must be taken while studying the decomposition reaction, when the ferrous sulphate crystals are heated in a boiling tube?

Description : Write two precautions that must be taken while studying the decomposition reaction, when the ferrous sulphate crystals are heated in a boiling tube?

Last Answer : Answer. Keep your nose away from the gas like SO2 which is suffocative. Use tube holder to heat the test tube.

Which of the following salts release reddish brown gas when heated in a dry test tube ?

Description : Which of the following salts release reddish brown gas when heated in a dry test tube ?

Last Answer : Which of the following salts release reddish brown gas when heated in a dry test tube ? A. `LiNO_(3)` B. `KNO_(3)` C. `Pb(NO_(3))_(2)` D. `AgNO_(3)`

Two inorganic compounds A and B were heated in a dry test tube. A evolved a colourless gas which turned lead acetate paper black and B evolved a gas w

Description : Two inorganic compounds A and B were heated in a dry test tube. A evolved a colourless gas which turned lead acetate paper black and B evolved a gas w

Last Answer : Two inorganic compounds A and B were heated in a dry test tube. A evolved a colourless gas which turned lead acetate ... ` D. `S^(2-), NO_(3)^(-)`

Which of the following can not evolve more than one gas (vapour) if heated in dry test tube.

Description : Which of the following can not evolve more than one gas (vapour) if heated in dry test tube.

Last Answer : Which of the following can not evolve more than one gas (vapour) if heated in dry test tube. A. `naNO_(3)(s)` B. ... D. `(NH_(4))_(2)Cr_(2)O_(7)(s)`

Four identical samples of a metal are heated to different temperatures. Based on the colors of their incandescences, which sample is the hottest? The sample that is: w) blue-white x) bright red y) yellow z) orange

Description : Four identical samples of a metal are heated to different temperatures. Based on the colors of their incandescences, which sample is the hottest? The sample that is: w) blue-white x) bright red y) yellow z) orange

Last Answer : ANSWER: W -- BLUE-WHITE

Which metal gives violet colour in oxidising flame when heated with borax ?

Description : Which metal gives violet colour in oxidising flame when heated with borax ?

Last Answer : Which metal gives violet colour in oxidising flame when heated with borax ? A. Fe B. Pb C. Co D. Mn

What happens when? a) A cleaned iron plate or iron nail is kept in 10g of copper sulphate solution. b) A pinch of mercuric oxide is kept in a test tube. c)A small crystal of silver nitrate is dissolved in distilled water and a drop of ammonium hydroxide & a pinch of glucose powder are added.

Description : What happens when? a) A cleaned iron plate or iron nail is kept in 10g of copper sulphate solution. b) A pinch of mercuric oxide is kept in a test tube. c)A small crystal of silver nitrate is dissolved in distilled water and a drop of ammonium hydroxide & a pinch of glucose powder are added.

Last Answer : a) A cleaned iron plate or iron nail is kept in 10g of copper sulphate solution. After a few hours a coating of copper is seen on iron nail/plate. It is based on displacement reaction. ... on the inner walls of the test tube. Aldehyde group in glucose reduced silver nitrate to metallic silver.

1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of the metal was formed. What is the equivalent weight of th

Description : 1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of the metal was formed. What is the equivalent weight of th

Last Answer : 1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of ... formed. What is the equivalent weight of the metal ?

As Rhombic sulphur is heated in a test tube : `{:(,"Process","Temperature"),((a),"Viscosity increases",T_(1)),((b),"Visconsity decrease",T_(2)),((c),"

Description : As Rhombic sulphur is heated in a test tube : `{:(,"Process","Temperature"),((a),"Viscosity increases",T_(1)),((b),"Visconsity decrease",T_(2)),((c),"

Last Answer : As Rhombic sulphur is heated in a test tube : `{:(,"Process","Temperature"),((a),"Viscosity increases",T_(1)),(( ... T_(3) lt T_(4) lt T_(1) lt T_(2)`

As Rhombic sulphur is heated in a test tube : `{:(,"Process","Temperature"),((a),"Viscosity increases",T_(1)),((b),"Visconsity decrease",T_(2)),((c),"

Description : As Rhombic sulphur is heated in a test tube : `{:(,"Process","Temperature"),((a),"Viscosity increases",T_(1)),((b),"Visconsity decrease",T_(2)),((c),"

Last Answer : As Rhombic sulphur is heated in a test tube : `{:(,"Process","Temperature"),((a),"Viscosity increases",T_(1)),(( ... T_(3) lt T_(4) lt T_(1) lt T_(2)`

What happens when: a) When a mixture of sodium acetate and soda lime is heated in a hard glass test tube.

Description : What happens when: a) When a mixture of sodium acetate and soda lime is heated in a hard glass test tube.

Last Answer : Methane gas is evolved. CH 3 COONA + NaOH CaO Na 2 CO 3 + CH 4 b) Methane is burnt in air or oxygen or methane undergoes complete combustion. It forms carbon dioxide and water. CO 2 + H ... ultraviolet light (sunlight). Organic product chloromethane is formed CH 4 + Cl 2 UV CH 3 Cl + HCl

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

When ethylhydrogen sulphate is heated with excess of alcohol at 410 K, the product obtained is

Description : When ethylhydrogen sulphate is heated with excess of alcohol at 410 K, the product obtained is

Last Answer : When ethylhydrogen sulphate is heated with excess of alcohol at 410 K, the product obtained is A. ... B. Ethylene C. Diethyl ether D. Diethyl sulphate

Metal (M) shows crimson red colour in flame test and its halide is deliquescent then metal (M) could be :

Description : Metal (M) shows crimson red colour in flame test and its halide is deliquescent then metal (M) could be :

Last Answer : Metal (M) shows crimson red colour in flame test and its halide is deliquescent then metal (M) could be : A. Li B. Mg C. Ca D. Ba

Is Melting coin being heated and turn black this is used as a test for metal a chemical or a physical change?

Description : Is Melting coin being heated and turn black this is used as a test for metal a chemical or a physical change?

Last Answer : hg

Pick up the correct statement from the following: (A) For determination of small colour intensities, tintometer is generally used (B) The odour of water sample is generally measured by a term called odour intensity (C) The colour of water sample may be detected by Nessler tube (D) All the above

Description : Pick up the correct statement from the following: (A) For determination of small colour intensities, tintometer is generally used (B) The odour of water sample is generally measured by a term called odour intensity (C) The colour of water sample may be detected by Nessler tube (D) All the above

Last Answer : (D) All the above

A blue colour flower plant denoted by BB is cross bred with that of white colour flower plant denoted by bb. (a) State the colour of flower you would expect in their F1 generation plants. (b) What must be the percentage of white flower plants in F2 generation if flowers of F1 plants are self-pollinated? (c) State the expected ratio of the genotypes BB and Bb in the F2 progeny. -Biology

Description : A blue colour flower plant denoted by BB is cross bred with that of white colour flower plant denoted by bb. (a) State the colour of flower you would expect in their F1 generation plants. (b) What ... -pollinated? (c) State the expected ratio of the genotypes BB and Bb in the F2 progeny. -Biology

Last Answer : This is your Answer.

23 Which one of the following sets of colour combinations is added in colour vision in TV? A. Red, green and blue B. Orange, black and violet C. White, red and Yellow D. Green, Yellow and Blue

Description : 23 Which one of the following sets of colour combinations is added in colour vision in TV? A. Red, green and blue B. Orange, black and violet C. White, red and Yellow D. Green, Yellow and Blue

Last Answer : ANSWER: A

To an astronaut in the spacecraft, the sky colour appears to be (a) Blue (b) White (c) Black (d) Orange red

Description : To an astronaut in the spacecraft, the sky colour appears to be (a) Blue (b) White (c) Black (d) Orange red

Last Answer : Ans:(c)

Persons who are colour-blind cannot distinguish between – (1) yellow and white (2) green and blue (3) red and green (4) black and yellow

Description : Persons who are colour-blind cannot distinguish between – (1) yellow and white (2) green and blue (3) red and green (4) black and yellow

Last Answer : (3) red and green Explanation: A person with colour-blindness has trouble seeing red, green, blue, or mixtures of these colours. The most common type is redgreen colours - blindness, where red and green are as the same colour.

The sky appears blue because – (1) All colours interfere to produce blue (2) In white light, the blue component dominates (3) The atmosphere scatters blue colour more than the others (4) It is actually blue

Description : The sky appears blue because – (1) All colours interfere to produce blue (2) In white light, the blue component dominates (3) The atmosphere scatters blue colour more than the others (4) It is actually blue

Last Answer : (3) The atmosphere scatters blue colour more than the others Explanation: Diffuse sky radiation is solar radiation reaching the Earth's surface after having been scattered from the direct solar beam by ... the atmosphere (approximately 25% of the incident radiation when the sun is high in the Sky.

The sky appears blue because – (1) All colours interfere to produce blue (2) In white light, the blue component dominates (3) The atmosphere scatters blue colour more than the others (4) It is actually blue

Description : The sky appears blue because – (1) All colours interfere to produce blue (2) In white light, the blue component dominates (3) The atmosphere scatters blue colour more than the others (4) It is actually blue

Last Answer : (3) The atmosphere scatters blue colour more than the others Explanation: Diffuse sky radiation is solar radiation reaching the Earth's surface after having been scattered from the direct solar beam by ... the atmosphere (approximately 25% of the incident radiation when the sun is high in the Sky.

Which colour is formed when Red and Green are mixed? (1) Light blue (2) Yellow (3) White (4) Grey

Description : Which colour is formed when Red and Green are mixed? (1) Light blue (2) Yellow (3) White (4) Grey

Last Answer : (2) Yellow Explanation: Red, green and blue are the primary colors and all other colors can be created from them. When red and green combine, the result is yellow.

which of the following statements is not true for scattering of light? (a) Colour of the scattered tight depends on the size of particles of the atmosphere. (b) Red light is least scattered in the atmosphere. (c) Scattering of light Lakes place as various colours of white light travel with different speed in fir. d) The fine particles in the atmospheric air scatter the blue, light more strongly than red. So the scattered blue light enters our eyes.

Description : which of the following statements is not true for scattering of light? (a) Colour of the scattered tight depends on the size of particles of the atmosphere. (b) Red light is least scattered in the ... air scatter the blue, light more strongly than red. So the scattered blue light enters our eyes.

Last Answer : (c) Scattering of light Lakes place as various colours of white light travel with different speed in fir.

Titanium dioxide is a/an __________ colour pigment. (A) White (B) Black (C) Yellow (D) Blue

Description : Titanium dioxide is a/an __________ colour pigment. (A) White (B) Black (C) Yellow (D) Blue

Last Answer : (A) White

The colour of statuary marble used for sculptor's work, is (A) Red (B) Blue (C) White (D) Green

Description : The colour of statuary marble used for sculptor's work, is (A) Red (B) Blue (C) White (D) Green

Last Answer : Answer: Option C

The sky appears blue because (1) all colours interfere to produce blue (2) in white light, the blue component dominates (3) the atmosphere scatters blue colour more than the others (4) it is actually blue

Description : The sky appears blue because (1) all colours interfere to produce blue (2) in white light, the blue component dominates (3) the atmosphere scatters blue colour more than the others (4) it is actually blue

Last Answer : the atmosphere scatters blue colour more than the others

Which combination of colour is the most convenient during day and night time ? (1) Organe and blue (2) White and black (3) Yellow and blue (4) Red and green

Description : Which combination of colour is the most convenient during day and night time ? (1) Organe and blue (2) White and black (3) Yellow and blue (4) Red and green

Last Answer : Red and green

In the Borax bead test of `Co^(2+)`, the blue colour of bead is due to the formation of :

Description : In the Borax bead test of `Co^(2+)`, the blue colour of bead is due to the formation of :

Last Answer : In the Borax bead test of `Co^(2+)`, the blue colour of bead is due to the formation of : A. `B_(2)O_(3)` B. ... B_(2)` C. `Co(BO_(2))_(2)` D. `Co O`

In nitroprusside test, amino acid cysteine produces a: (A) Red colour (B) Blue colour (C) Yellow colour (D) Purple colour

Description : In nitroprusside test, amino acid cysteine produces a: (A) Red colour (B) Blue colour (C) Yellow colour (D) Purple colour

Last Answer : Answer : A

In Nitroprusside test, amino acid cystein produces (A) Blue colour complex (B) Red colour (C) Yellow colour (D) Purple colour

Description : In Nitroprusside test, amino acid cystein produces (A) Blue colour complex (B) Red colour (C) Yellow colour (D) Purple colour

Last Answer : Answer : B

An iron nail is dipped in the solution of copper sulphate for about 30 minutes. State the change in colour observed. Give reason for the change. -Chemistry-10

Description : An iron nail is dipped in the solution of copper sulphate for about 30 minutes. State the change in colour observed. Give reason for the change. -Chemistry-10

Last Answer : When an iron nail is dipped in copper sulphate solution, the displacement reaction takes place. The colour of copper sulphate solution fades due to the formation of light green solution of iron sulphate.

Why does the colour of copper sulphate solution change when an iron nail is dipped in it ? -Chemistry-10

Description : Why does the colour of copper sulphate solution change when an iron nail is dipped in it ? -Chemistry-10

Last Answer : When an iron nail is dipped in copper sulphate solution, the displacement reaction takes place. The colour of copper sulphate solution fades due to the formation of light green solution of iron sulphate.

Why does the colour of copper sulphate solution change when an iron nail is dipped in it? Write two observations. -Chemistry

Description : Why does the colour of copper sulphate solution change when an iron nail is dipped in it? Write two observations. -Chemistry

Last Answer : Answer. It is because displacement reaction takes place. Iron displaces copper from copper sulphate solution and forms pale green coloured solution of FeS04 and reddish brown copper metal gets deposited. Fe(s) + CuS04(aq) ——–> FeS04(aq) + Cu(s)

What is the colour of ferrous sulphate crystals? How does this colour change after heating? -Chemistry

Description : What is the colour of ferrous sulphate crystals? How does this colour change after heating? -Chemistry

Last Answer : Answer.The colour of ferrous sulphate is pale green. The colour changes to reddish brown on heating due to formation of iron (III) oxide. Give an example each for ... reactions. Write relevant balanced chemical equations also. Thermal decomposition reaction: Photochemical decomposition reaction:

What is the colour of copper sulphate?

Description : What is the colour of copper sulphate?

Last Answer : Blue

The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

Description : The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

Last Answer : The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be A. chloride B. carbonate C. acetate D. bromide

The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

Description : The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

Last Answer : The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be A. Suphite B. Bromide C. Nitrite D. Chloride

What does the light blue tube test for?

Description : What does the light blue tube test for?

Last Answer : Feel Free to Answer

A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole? (1) Increase (2) Decrease (3) Remain constant (4) Will increase first and then decrease

Description : A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole? (1) Increase (2) Decrease (3) Remain constant (4) Will increase first and then decrease

Last Answer : (1) Increase Explanation: Assuming the disc is uniform and isotropic (the same in different directions), the hole will expand in the same ratio as the metal. It is because the thermal expansion equation ... is made out of metal. And if the circumference of the hole expands, so does the diameter.

A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ? (1) Increase (2) Dacrease (3) Remain constant (4) Will increase first and then dcrease

Description : A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ? (1) Increase (2) Dacrease (3) Remain constant (4) Will increase first and then dcrease

Last Answer : Increase

Light colours absorb less heat therefore these are not heated as much as the black colour.

Description : Light colours absorb less heat therefore these are not heated as much as the black colour.

Last Answer : Ans: Dark colours do not exactly absorb more heat, but they do convert a higher percentage of light into heat. In the sun with a dark coloured shirt it gets hot, where a lighter ... and converted into heat. White objects reflect all visible light, where black objects absorb all visible light.

How many of the following liberate `O_(2)` on heating in a dry test tube ? `CaO, Fe_(2)O_(3), Fe_(3)O_(4), FeO, Cr_(2)O_(3), XeF_(4), Al_(2)O_(3), MgO

Description : How many of the following liberate `O_(2)` on heating in a dry test tube ? `CaO, Fe_(2)O_(3), Fe_(3)O_(4), FeO, Cr_(2)O_(3), XeF_(4), Al_(2)O_(3), MgO

Last Answer : How many of the following liberate `O_(2)` on heating in a dry test tube ? `CaO, Fe_(2)O_(3), Fe_(3)O_(4), ... 3), XeF_(4), Al_(2)O_(3), MgO, Na_(2)O`

Alkali metal salt "X" gives a pale violet colour in flame test "X" is :

Description : Alkali metal salt "X" gives a pale violet colour in flame test "X" is :

Last Answer : Alkali metal salt "X" gives a pale violet colour in flame test "X" is : A. NaCl B. LiCl C. KCl D. None of these