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If the foci of an ellipse are (± √5, 0) and its eccentricity is √5/3, then the equation of the ellipse is
∆E° of combustion of iso-butylene is -X kJ mol -1 . The value of ∆H° is
The incorrect expression among the following is
In Goldschmidt aluminothermic process, thermite contains
Aluminothermic reactions are exothermic chemical reactions using aluminium as the reducing agent at high temperature. The process is industrially useful for production of alloys of iron. The most prominent example is the thermite reaction between aluminium and iron oxide in the ratio 3:1.
Silicate mineral with silica tetrahedra linked by shared oxygens into infinite one-dimensional chains . Single chains characterize pyroxens; double chains characterize amphiboles and wider chains grade towards sheet structure. Hence they have silicate structure unit of
0.1 mole of CH3NH2 (Kb = 5 × 10-4) is mixed with 0.08 mole of HCl and diluted to 1L. What will be the H+ concentration in the solution ?
Which of the following exists as covalent crystals in the solid state ?
Iodine, sulphur and phosphorus exists as I2, S6 and P4 respectively. Silicion does exist as covalent crystal in the solid state, because in silicon, constituent particles are bonded together by covalent bons.
Lassaigne's test for the detection of nitrogen fails in
NH2 – NH2 – HCl does not give Lassaigne’s test as it does not contains carbon. Lassaigne’s test is given by only those nitrogenous compounds in which both carbon and nitrogen is present
In which of the following pairs, the constants/ quantities are not mathematically related to each other?
A reaction was observed for 15 days and the percentage of the reactant remaining after the days indicated was recorded in the following table.
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