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Chemistryaldehydes-ketones-and-carboxylic-acids2022medium
Find out the major product for the above reaction.
Chemistryaldehydes-ketones-and-carboxylic-acids2022medium
Consider the above reaction sequence, the Product 'C' is :
Chemistryaldehydes-ketones-and-carboxylic-acids2022easy
Correct structure of -methylcyclohexane carbaldehyde is
Chemistrysome-basic-concepts-of-chemistry2022medium
Production of iron in blast furnace follows the following equation Fe3O4(s) + 4CO(g) 3Fe(l) + 4CO2(g) when 4.640 kg of Fe3O4 and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is : [Given : Molar Atomic mass (g mol1) : Fe = 56, Molar Atomic mass (g mol1) : O = 16, Molar Atomic mass (g mol1) : C = 12]
Chemistrysome-basic-concepts-of-chemistry2022easy
Using the rules for significant figures, the correct answer for the expression {{0.02858 \times 0.112} \over {0.5702}} will be
Chemistrysome-basic-concepts-of-chemistry2022easy
Compound A contains 8.7% Hydrogen, 74% Carbon and 17.3% Nitrogen. The molecular formula of the compound is, Given : Atomic masses of C, H and N are 12, 1 and 14 amu respectively. The molar mass of the compound A is 162 g mol1.
Chemistrysome-basic-concepts-of-chemistry2022medium
A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL, the molarity of this solution is: (Atomic mass : Cl = 35.5 amu, H = 1 amu)
Chemistrysome-basic-concepts-of-chemistry2022easy
120 g of an organic compound that contains only carbon and hydrogen gives 330 g of CO2 and 270 g of water on complete combustion. The percentage of carbon and hydrogen, respectively are
Chemistrysome-basic-concepts-of-chemistry2022medium
If a rocket runs on a fuel (C15H30) and liquid oxygen, the weight of oxygen required and CO2 released for every litre of fuel respectively are : (Given : density of the fuel is 0.756 g/mL)
Chemistrysome-basic-concepts-of-chemistry2022easy
on reaction with excess of water results into acidic mixture 16 moles of is required for the complete neutralisation of the resultant acidic mixture. The number of moles of used is :
Chemistrysome-basic-concepts-of-chemistry2022medium
Hemoglobin contains of iron by mass. The number of Fe atoms in of hemoglobin is (Given: Atomic mass of Fe is .)
Chemistrysome-basic-concepts-of-chemistry2022medium
solution of -glucose in water contains of carbon by weight. The molality of the solution is nearest to (Given: Atomic Weights are, )
Chemistrysome-basic-concepts-of-chemistry2022easy
In Carius method of estimation of halogen, of an organic compound gave of . Find out the percentage of bromine in the compound. (Molar masses : )
Chemistrysome-basic-concepts-of-chemistry2022medium
Consider the above reaction, the limiting reagent of the reaction and number of moles of formed respectively are :
Chemistrysome-basic-concepts-of-chemistry2022medium
Consider the reaction The amount of required to produce of is (Given: Atomic masses of and are and 39, respectively.)
Chemistrysome-basic-concepts-of-chemistry2022medium
When coal of purity 60% is allowed to burn in presence of insufficient oxygen, 60% of carbon is converted into 'CO' and the remaining is converted into ''. The heat generated when of coal is burnt is _________.
Chemistryisolation-of-elements2022easy
In isolation of which one of the following metals from their ores, the use of cyanide salt is not commonly involved?
Chemistryisolation-of-elements2022easy
Match List I with List II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} List-I Ore List-II Composition (A) Siderite (I) FeCO (B) Malachite (II) CuCO . Cu(OH) (C) Sphalerite (III) ZnS (D) Calamine (IV) ZnCO Choose the correct answer from the options given below :
Chemistryisolation-of-elements2022easy
In the metallurgical extraction of copper, following reaction is used : FeO + SiO2 FeSiO3 FeO and FeSiO3 respectively are.
Chemistryisolation-of-elements2022medium
Given are two statements one is labelled as Assertion A and other is labelled as Reason R. Assertion A : Magnesium can reduce Al2O3 at a temperature below 1350C, while above 1350C, while above 1350C aluminium can reduce MgO. Reason R : The melting and boiling points of magnesium are lower than those of aluminium. n light of the above statements, choose most appropriate answer from the options given below :
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