Chemistrysome-basic-concepts-of-chemistry2019medium
For the following reaction, in the mass of water produced from 445 g of C57H110O6 is :
2C57H110O6(s) + 163 O2(g) 114 CO2(g) + 110 H2O(l)
Chemistrysome-basic-concepts-of-chemistry2019easy
A solution of sodium sulphate contains 92 g of Na+ ions per kilogram of water. The molality of Na+ ions in that solution in mol kg1 is :
Chemistrysome-basic-concepts-of-chemistry2019easy
The percentage composition of carbon by mole
in methane is :
Chemistryisolation-of-elements2019easy
The ore that contains the metal in the form of
fluoride is :
Chemistryisolation-of-elements2019easy
The correct statement is :
Chemistryisolation-of-elements2019easy
The idea of froth floatation method came from a person X and this method is related to the process Y of ores. X and Y, respectively, are :
Chemistryisolation-of-elements2019easy
The correct statement is :
Chemistryisolation-of-elements2019easy
Match the refining methods (Column I) with metals (Column II).
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Column I
(Refining Methods)
Column II
(Metals)
(I) Liquation
(a) Zr
(II) Zone Refining
(b) Ni
(III) Mond Process
(c) Sn
(IV) Van Arkel Method
(d) Ga
Chemistryisolation-of-elements2019easy
Assertion: For the extraction of iron, haematite
ore is used.
Reason: Haematite is a carbonate ore of iron.
Chemistryisolation-of-elements2019easy
The one that is not a carbonate ore is :
Chemistryisolation-of-elements2019easy
The Mond process is used for the
Chemistryisolation-of-elements2019easy
With respect to an ore, Ellingham diagram helps to predict the feasibility of its.
Chemistryisolation-of-elements2019easy
The pair that does NOT require calcination is -
Chemistryisolation-of-elements2019easy
In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of -
Chemistryisolation-of-elements2019easy
Match the ores (column A) with the metals (column B) :
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(Column A) ores
(Column B) Metals
(I)
Siderite
(a)
Zinc
(II)
Kaolinite
(b)
Copper
(III)
Malachite
(c)
Iron
(IV)
Calamine
(d)
Aluminium
Chemistryisolation-of-elements2019easy
The electrolytes usually used in the electroplating of gold and silver, respectively are :
Chemistryisolation-of-elements2019easy
Hall- Heroult's process is given by :
Chemistryisolation-of-elements2019medium
The correct statement regarding the given Ellingham diagram is :
Chemistryisolation-of-elements2019easy
The ore that contains both iron and copper is :
Chemistrysolutions2019medium
A solution is prepared by dissolving 0.6 g of urea (molar mass = 60 g mol–1) and 1.8 g of glucose (molar
mass = 180 g mol–1) in 100 mL of water at 27oC. The osmotic pressure of the solution is :
(R = 0.08206 L atm K–1
mol–1)