Description : On heating, a white amorphous inorganic compound becomes yellow and on cooling, turns white again. The salt may be
Last Answer : On heating, a white amorphous inorganic compound becomes yellow and on cooling, turns white again. The salt may be A. ... `ZnCO_(3)` D. `K_(2)CO_(3)`
Description : Which of the following salt liberates a colourless gas on acidification with dil. `H_(2)SO_(4)` ?
Last Answer : Which of the following salt liberates a colourless gas on acidification with dil. `H_(2)SO_(4)` ? A. `KNO_(2)` ... (3)` C. `NaNO_(2)` D. `NaHCO_(3)`
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 : A compound X' on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound Y'. X' also reacts with sodium metal to evolve a colourless gas Z'. Identify X', Y' ... the chemical reaction of formation of Y' and also write the role of sulphuric acid in the reaction. -Science
Last Answer : X-Ethanol/ (C2H5OH)/Ethyl AlcoholY- Ethene / (C2H4)Z- Hydrogen/ (H2)Role of sulphuric acid - dehydrating agent
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 : In phenolphthalein solution bases turns into (a) Pink (b) Yellow (c) Orange (d) Colourless
Last Answer : (a) Pink
Description : Methyl orange indicator turns (A) Orange yellow in alkaline medium (B) Orange yellow in acidic medium (C) Colourless in acidic medium (D) Colourless in basic medium
Last Answer : (A) Orange yellow in alkaline medium
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
Description : Which gas turns litmus colourless?
Last Answer : Chlorine
Description : We're both found in you; one thicker than the other; one colourless and the other colored. What are we? -Riddles
Last Answer : Water and blood.
Description : Silver halides are used in photographic plates because they are (a) Oxidised in air (b) Colourless (c) Easily soluble in a hypo solution (d) Readily reduced by light
Last Answer : Ans:(d)
Description : Silver halides are used in photographic plates because they are - (1) oxidised in air (2) soluble in hyposolution (3) reduced by light (4) totally colourless
Last Answer : (3) reduced by light Explanation: The light-sensitive chemicals used in photographic film and paper are silver halides. Silver halides are used in photographic film and photographic paper, including ... - meaning that it can undergo development which turns the entire crystal into metallic silver.
Description : Silver halides are used in photographic plates because they are (1) oxidised in air (2) soluble in hyposolution (3) reduced by light (4) totally colourless
Last Answer : reduced by light
Description : A compound reacts with sodium and liberates hydrogen and on oxidation gives ketone. The formula of the compound could be
Last Answer : A compound reacts with sodium and liberates hydrogen and on oxidation gives ketone. The formula of the compound could ... `CH_(3)CH_(2)CH_(2)CH_(2)OH`
Description : Why the blue colour of CuSO4 turns colourless during electrolysis of CuSO4 solution by platinum electrode.
Last Answer : The platinum electrodes are inert. Hence does not dissolve into the solution. The Cu++ ions (blue) present in the solution are discharged on the surface of cathode & OH - are ... a result of this electrolysis, blue coloured CuSO4 solution is slowly converted into colorless H2SO4 solution.
Description : what turns mandevilla leaves yellow with little brown spots
Last Answer : Need Answer
Description : Bromine is a----------? A. black solid B. red-brown liquid (Answer) C. colourless gas D. highly inflammable gas
Last Answer : B. red-brown liquid (Answer)
Description : Paper pulp produced by Kraft/sulphate process is (A) Bleached easily (B) Dull white in color (C) Strong fibrous (D) Dark colored
Last Answer : (C) Strong fibrous
Description : why are my basil leaves turning brown with a brownish residue on back that washes off ?
Description : A yellow coloured crystalline substance gave a colourless gas `X` on reaction with fluorine, which is thermally stable and has octahedral geometry. `X
Last Answer : A yellow coloured crystalline substance gave a colourless gas `X` on reaction with fluorine, which is ... and has octahedral geometry. `X` can be
Last Answer : A yellow coloured crystalline substance gave a colourless gas `X` on reaction with fluorine, which is thermally stable ... `SF_(2)` D. `S_(2)F_(6)`
Description : A yellow metallic powder is burnt in a stream of fluorine to obtain a colourless gas X which is thermally stable and chemically inert. Its molecule ha
Last Answer : A yellow metallic powder is burnt in a stream of fluorine to obtain a colourless gas X which is thermally stable ... and NaC1` D. `SF_(4) and SF_(6)`
Description : White crystalline solid (A) reacts with `H_2` to form a highly associated liquid (B) and a monoatomic , colourless gas (C ). The liquid (B) is used fo
Last Answer : White crystalline solid (A) reacts with `H_2` to form a highly associated liquid (B) and a ... has only unpaired electron in `pi` molecular orbital.
Last Answer : White crystalline solid (A) reacts with `H_2` to form a highly associated liquid (B) and a ... metallic bonds D. ionic, covalent and Hydrogen bonds
Last Answer : White crystalline solid (A) reacts with `H_2` to form a highly associated liquid (B) and a monoatomic , colourless gas ... 3)d` D. V - shape, `sp^(3)`
Description : A white solid reacts with dilute HCI to give colourless gas that de-colourises aqueous bromine. The solid is likely to be.
Last Answer : A white solid reacts with dilute HCI to give colourless gas that de-colourises aqueous bromine. ... chloride C. Sodium acetate D. Sodium thiosulphate
Description : Pick out the wrong statement. (A) Pasteurisation of milk involves moderate heating followed by cooling (B) Bakeries and breweries make use of yeasts (C) Enzyme is a complex nitrogenous compound (D) Oils and fats are alkaloids
Last Answer : (D) Oils and fats are alkaloids
Description : The gas which liberates bromine from a solution of KBr is
Last Answer : The gas which liberates bromine from a solution of KBr is A. `Cl_2` B. `I_2` C. `SO_2` D. `HI`
Description : Jai is having in his home four pet dogs named Saty, Jany, Rex, and Leo. The colors of the dogs are Brown, White, Grey and Black (not necessarily in the same order). The four dogs belong to different ... in color, then which dog belongs to pug breed? (a)Saty (b)Rex (c)Jany (d)Cannot be determined
Last Answer : (a)Saty
Description : Jai is having in his home four pet dogs named Saty, Jany, Rex, and Leo. The colors of the dogs are Brown, White, Grey and Black (not necessarily in the same order). The four dogs belong to ... Labrador breed. Which dog belongs to Labrador breed? (a)Saty (b) Leo (c)Jany (d)Cannot be determined
Last Answer : (d)Cannot be determined
Description : Jai is having in his home four pet dogs named Saty, Jany, Rex, and Leo. The colors of the dogs are Brown, White, Grey and Black (not necessarily in the same order). The four dogs belong to different breeds- ... the color of Alsatian dog? (a) Brown (b) Grey (c) Either(a)or(b) (d)None of these
Last Answer : (c) Either(a)or(b)
Description : Jai is having in his home four pet dogs named Saty, Jany, Rex, and Leo. The colors of the dogs are Brown, White, Grey and Black (not necessarily in the same order). The four dogs belong to different breeds- ... Pug, then what could be the color of Saty? (a) White (b) Black (c) Brown (d) Grey
Last Answer : Ans: option (b)
Description : Jai is having in his home four pet dogs named Saty, Jany, Rex, and Leo. The colors of the dogs are Brown, White, Grey and Black (not necessarily in the same order). The four dogs belong to different breeds- ... , then what could be its breed? (a) Labrador (b) Pug (c)Bull dog (d) None of these
Last Answer : (c)Bull dog
Description : The compound which on strong heating gives oxygen is :
Last Answer : The compound which on strong heating gives oxygen is : A. `AgNO_(3)` B. `BaO_(2)` C. `Pb(NO_(3))_(2)` D. `CaCO_(3)`
Description : A white crystaline oxide (A) having garlic smell reacts with cold water to form a compound (B). On heating, (B) gives compound (C) & gas (D). Which of
Last Answer : A white crystaline oxide (A) having garlic smell reacts with cold water to form a compound (B). On ... ) can act as a reducing agent but (C) cannot
Description : (3) prevents freezing of petrol Explanation: Ethylene glycol (IUPAC name: ethane-1,2-diol) is an organic compound widely used as an automotive antifreeze and a precursor to polymers. In its pure form, it is ... A mixture of 60% ethylene glycol and 40% water freezes at -45 degree C (- 49 degree F).
Last Answer : Rust is - (1) A mixture of Fe₂O₃ and Fe(OH) ₂ (2) A mixture of FeO and Fe(OH)₂ (3) FeO only (4) A mixture of Fe₂O₃, 3H₂O and FeO
Description : One day, a scientist was down in his personal lab. It was around 11 o'clock. He was working late on poisons and their antidotes. He was hungry, so he went to get a snack. Suddenly, he found ... and pink colored poisons in his lab. All of them were deadly. Which one did the scientist choose? -Riddles
Last Answer : The white one, since sugar is known as 'White Poison'.
Description : what causes Podocarpus leaves/branches to turn a rust colored brown
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 : __________ of grey cast iron produces white cast iron. (A) Tempering (B) Rapid heating (C) Rapid cooling (D) Slow cooling
Last Answer : Option B
Description : yellow flowers, dull colored green broad leave, leaves, big thorns, what is it?
Description : The colour of Methyl orange in basic solution is (A)Orange (B) Pink (C) Yellow (D) Colourless
Last Answer : (C) Yellow
Description : One moles of anhydrous `AB` dissolves in water and liberates `21.0 J mol^(-1)` of heat. The valueof `DeltaH^(Theta)` (hydration) of `AB` is `-29.4 J m
Last Answer : One moles of anhydrous `AB` dissolves in water and liberates `21.0 J mol^(-1)` of heat. The valueof `DeltaH^(Theta) ... mol^(-1)` D. `-8.4 J mol^(-1)`
Description : ID a nut tree with large, heart shaped leaves and Springtime white flowers with rose colored centers?
Description : Which of the following cells are Colourless? A. Red blood cells B. White blood cells (Answer)
Last Answer : B. White blood cells (Answer)