Description : Heating mixture of `Cu_(2)O` and `Cu_(2)S` will give
Last Answer : Heating mixture of `Cu_(2)O` and `Cu_(2)S` will give A. `Cu_(2)SO_(3)` B. `CuO+CuS` C. `Cu+SO_(3)` D. `Cu + SO_(2)`
Description : Upon heating with `Cu_(2)S` the reaction (s) that give copper metal is /are
Last Answer : Upon heating with `Cu_(2)S` the reaction (s) that give copper metal is /are A. `CuFeS_(2)` B. `CuO` C. `Cu_(2)O` D. `CuSO_(4)`
Description : A mixture of CuS (molecular weight = `M_(1)`) and `Cu_(2)S` (molecular weight `=M_(2)`) is oxidised by `KMnO_(4)` (molecular weight `=M_(3)`) in acidi
Last Answer : A mixture of CuS (molecular weight = `M_(1)`) and `Cu_(2)S` (molecular weight `=M_(2)`) is ... of CuS, `Cu_(2)S` and `KMnO_(4)` respectively.
Description : In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with
Last Answer : In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with A. FeS B. CO C. `Cu_(2)S` D. `SO_(2)`
Description : (A): At 1200K iron can be reduce cuprous oxide (R )L: At 1200K, `Fe+Cu_(2)O to FeO+2Cu` `DeltaG=-300kj//"mole"`
Last Answer : (A): At 1200K iron can be reduce cuprous oxide (R )L: At 1200K, `Fe+Cu_(2)O to FeO+2Cu` ` ... incorrect D. If (A) is incorrect but (R ) is correct
Description : From the graph, which is the best reducing agent to reduce `Cu_(2)O` at high temperature
Last Answer : From the graph, which is the best reducing agent to reduce `Cu_(2)O` at high temperature A. Coke B. CO C. `CO_(2)` D. 1&2
Description : Two ores A1 and A2 of a metal M show the following reactivity: `A_(1)=CuCo_(3).Cu(OH)_(3),S=Cu` `P=Cu_(2)I_(2): G=SO_(2)` . Then `A_(2)` is
Last Answer : Two ores A1 and A2 of a metal M show the following reactivity: `A_(1)=CuCo_(3).Cu(OH)_(3),S=Cu` `P=Cu_(2) ... )` B. `CuO` C. `CuCO_(3)` D. `Cu_(2)S`
Description : Out of `Cu_(2)S,HgS,Ag_(2)S` and ZnS roasting will convert the mineral in to metal case of
Last Answer : Out of `Cu_(2)S,HgS,Ag_(2)S` and ZnS roasting will convert the mineral in to metal case of A. `Cu_(2)S,Zns` B. Hgs,ZnS C. `Cu_(2)S,Ag_(2)S` D. HgS
Description : In Bessemer converter `Cu_(2)S` is converted in to blister copper in
Last Answer : In Bessemer converter `Cu_(2)S` is converted in to blister copper in A. self reduction B. reduction with ... coal gas D. reduction with `H_(2)` gas
Description : Amongst `[TiE_(6)]^(2-), [CoF_(6)]^(3-), Cu_(2)Cl_(2)` and `[NiCl_(4)]^(2-)` [Atomic no. `Ti = 22, Co = 27, Cu = 29, Ni = 28`] the colourless species
Last Answer : Amongst `[TiE_(6)]^(2-), [CoF_(6)]^(3-), Cu_(2)Cl_(2)` and `[NiCl_(4)]^(2-)` [Atomic no. `Ti = 22, ... (2)Cl_(2)` D. `TiF_(6)^(2-) and Cu_(2)Cl_(2)`
Description : P is an alcohl which on heating with `Al_(2)O_(3)` forms an alkene Q.Q on ozonolysis produces R and S. When the mixture of R and S is heated with NaOH
Last Answer : P is an alcohl which on heating with `Al_(2)O_(3)` forms an alkene Q.Q on ozonolysis produces R and S. When ... ))overset(|)(C)-CH_(2)-CH=O+CH_(2)=O`
Last Answer : P is an alcohl which on heating with `Al_(2)O_(3)` forms an alkene Q.Q on ozonolysis produces R and S. ... (|)overset(CH_(3))overset(|)(C)-CH=CH_(2)`
Last Answer : P is an alcohl which on heating with `Al_(2)O_(3)` forms an alkene Q.Q on ozonolysis produces R and S. ... (3))overset(|)(CH)-CH_(2)-COCl+CH_(3)MgCl`
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 : Carbylamine test is performed in alcoholic `KOH` by heating a mixture of:
Last Answer : Carbylamine test is performed in alcoholic `KOH` by heating a mixture of: A. chloroform and silver ... amine D. an alkyl cyanide and a primary amine
Description : A mixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. This is known as
Last Answer : A mixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. ... Smelting B. Calcination C. Roasting D. Liquition
Description : Cement is formed by strongly heating a mixture of – (1) limestone and graphite (2) limestone and clay (3) chalk and graphite (4) clay and graphite
Last Answer : (2) limestone and clay Explanation: Cement is made by heating limestone (calcium carbonate) with small quantities of other materials (such as clay) to 1450 degree C in a kiln, in a process known as ... , or quicklime, which is then blended with the other materials that have been included in the mix.
Description : Cement is formed by strongly heating a Mixture of –
Last Answer : Lime Stone and clay
Description : Steam distillation is not recommended to be used, if the (A) Azeotropic mixture is to be separated and the final product is miscible with water (B) Liquids decompose, if ... unstable or has the tendency to react with other components associated with it, at the boiling temperature
Last Answer : (A) Azeotropic mixture is to be separated and the final product is miscible with water
Description : Carborundum is prepared heating a mixture of
Last Answer : silicon and coke in an electric furnace
Description : Which of the following is not used as a medium for high temperature heating ? (A) Dowtherm (B) Mercury (C) Liquid metal (e.g. molten sodium) (D) Fused salts (e.g., an eutectic mixture of 53% KNO3 , 40% NaNO2and 7% NaNO3 )
Last Answer : (B) Mercury
Description : Heating a mixture of phosphate rock, coke and sand in an electric furnace produces (A) Phosphoric acid (B) Ammonium phosphate (C) Phosphorous (D) Superphosphate
Last Answer : (C) Phosphorous
Description : Propionamide on heating with a mixture of bromine and sodium hydroxide gives (a) Propane (b) Propylamine (c) Propanol (d) Ethylamine
Last Answer : Ethylamine
Description : Carbylamine test involves heating a mixture of (a) alcoholic KOH, methyl iodide, and sodium metal (b) alcoholic KOH, methyl iodide, and primary amine (c) alcoholic KOH, chloroform, and primary amine (d) alcoholic KOH, methyl alcohol, and primary amine
Last Answer : alcoholic KOH, chloroform, and primary amine
Description : Cement is formed by strongly heating a Mixture of
Last Answer : Limestone and clay
Description : Cement is formed by strongly heating a mixture of (1) limestone and graphite (2) limestone and clay (3) chalk and graphite (4) clay and graphite
Last Answer : limestone and clay
Description : Benzaldehyde reacts with a mixture of concentrated sulfuric acid and nitric acid to give (a) p-Nitrobenzaldehyde (b) o-Nitrobenzaldehyde (c) p-Nitrobenzoic acid (d) m-Nitrobenzaldehyde
Last Answer : m-Nitrobenzaldehyde
Description : P and Q are isomer of dicraboxylic acid `C_(4)H_(4)O_(4)` Both decolourixe `Br_(2)//H_(2)O`. On heating , P forms the cyclic anhydride. Upon treatment
Last Answer : P and Q are isomer of dicraboxylic acid `C_(4)H_(4)O_(4)` Both decolourixe `Br_(2)//H_(2)O`. On ... sequences V and W are respectively A. B. C. D.
Description : `P` and `Q` are isomers of dicarboxylic acid `C_(4)H_(4)O_(4)`. Bothdecolorize `Br_(2)//H_(2)O`. On heating, `P` forms the cyclic anhydride. Upon trea
Last Answer : `P` and `Q` are isomers of dicarboxylic acid `C_(4)H_(4)O_(4)`. Bothdecolorize `Br_(2)// ... . Optically inactive pair (T, U) and optically inactive S
Description : Number of possible intra molecular aldol condensation product on heating with NaOH `H_(3)C-overset(O)overset(||)(C)-CH_(2)-CH_(2)-CH_(2)-overset(O)ove
Last Answer : Number of possible intra molecular aldol condensation product on heating with NaOH `H_(3)C-overset(O)overset(|| ... CH_(2)-overset(O)overset(||)(C)-H`
Description : A monocarboxylic acid decolourise `Br_(2) - H_(2)O`, on heating with soda lime derivate of styrene is formed , with neutral `FeCl_(3)` , a buff colour
Last Answer : A monocarboxylic acid decolourise `Br_(2) - H_(2)O`, on heating with soda lime derivate of styrene is formed , ... . Acid could be : A. B. C. D.
Description : Assertion (A): o-phenol sulphonic acid on heating at `100^(@)C` changes to p-phenol sulphonic acid. Reason : Sulphonation of phenol is a reversible pr
Last Answer : Assertion (A): o-phenol sulphonic acid on heating at `100^(@)C` changes to p-phenol sulphonic acid. ... in correct D. A is incorrect but R is correct
Description : In a refrigeration cycle, the super heating……..C.O.P (a)decreases (b)does not change (c) increases (d)none of the above
Last Answer : Ans: a
Description : What is the name and chemical formula of the main product formed by heating baking soda. (a) sodium carbonate,Na 2 CO 3 (b) Bleaching powder ,CaOCl 2 (c) sodium chloride,Na Cl (d)Plaster of paris ,CaSO 4 .I/2H 2 O
Last Answer : (a) sodium carbonate,Na 2 CO 3
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 : (mixture of alkenes) `overset((i) O_(3))underset((ii) Zn//H_(2)O)to` (mixture of carbonyl compounds). The incorrect statement is
Last Answer : (mixture of alkenes) `overset((i) O_(3))underset((ii) Zn//H_(2)O)to` (mixture of ... KOH D. Only two carbonyl compounds give positive idoform test
Description : How will you separate a mixture of o-nitrophenol and p- nitrophenol ?
Last Answer : o-nitrophenol is steam volatile therefore it can be separated by Steam distillation.
Description : A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. mxylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture? (A) The mixture exhibits ... : o-xylene 30, p-xylene 60 and m-xyoene 10 (D) The mixture contain optical isomers
Last Answer : (A) The mixture exhibits an azeotrope at 101.3 kPa
Description : The processing of green tea involves brief heating of the freshly picked leaves. What could be the possible reason/s? 1. To retain green colour of leaves 2. To give it a special flavour 3. To denature leaf enzymes for preventing ... reason/s is/are true? (a) Only 1 (b) 1 and 3 (c) Only 2 (d) Only 3
Last Answer : Ans:(d)