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Tests
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- How many moles of electrons weight one kilogram?
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- Equivalent weights of oxidizing and reducing agents in the following reaction:
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- The radius of the Polonium 210 nucleus may be taken as 8.3 fm. What is the radius of the iron –56 nucleus ?
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- Action of hot and conc. on metallic tin produces:
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- The first ionization energy for following metals will be in the order
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- When the sodium salt of an organic acid is strongly heated, it yields sodium carbonate. If the weight ratio of the sodium salt to sodium carbonate obtained is 5 : 4, what is the...
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- On gold surface, the rate of decomposition of HI is independent of the pressures of HI but on Pt surface, the rate is proportional to concentration of HI. It is concluded that
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- Number of gram of oxygen in 32.2 g is -
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- If equal volume of 1M and 1M solutions are allowed to oxidize Fe (II) to Fe (III) in acidic medium, then Fe (II) oxidized will be
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- is prepared by
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- The IUPAC hydrogen compound is
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- Which of the following will respond to Cannizzaro reaction ?
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- In the modern periodic table the place of the element with atomic number 31 is in-
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- Excess of NaOH solution reacts with zinc to form-
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- Which one of the following does not give alkane?
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- forms an alcohol on reaction with-
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- Which of the following statement is correct?
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- The maximum number of hydrogen bonds in which a water molecule can participate is-
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- The reaction is spontaneous if the cell potential is-
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- Which one of the following ions is colourless?
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- Among the alkaline earth metals the element forming predominantly covalent compounds is-
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- In the following nuclear reactions,and and are respectively -
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- The relation between solubility (S) and solubility product of a partially soluble binary electrolyte is
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- The unit of rate constant of a second order chemical reaction is -
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- The molarity and molality of a solution of sulphuric acid are respectively11.07 and 21 .91. The density of the solution in g/ml is -
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- The distillation of phenol with zinc dust gives-
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- Nitration of benzene, produce nitrobenzene. During nitration the role of conc. in nitratin mixture is as a:
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- The values of for the combustion of ehtane and acetylene are -341.1 and -310.0 K cal, respectively. The better fuel is:
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- In Friedel-Craft’s reaction, anhyd. acts to:
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- The product obtained by the reaction of ethyl amine with acetyl chloride is :
