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Which of the following reactions is used for detecting presence of carbonyl group ?
An element has 2 electrons is K-shell, 8 electrons in L-shell, 13 electrons in M-shell and one electron in N-shell. The element is
Which of the following alkyl group has the maximum + I effect?
The volume of 1.0 g of hydrogen in litres at N.T.P. is
The bromination of benzene in presence of FeBr₃ is an example of
A chemical reaction will be spontaneous if it is accompained by a decrease of
The decomposition of a substance follows first order kinetics. If its conc. is reduced to 1/8 th of its initial value, in 24 minutes, the rate constant of decomposition process is
The equilibrium constant for the following reaction will be 3 A + 2 B → C
Which of the following species has the highest ionization potential?
Li+ has highest ionization potential among the given species. The reason for this is after losing one electron, the Li+ ion has more stable inert gas configuration, i.e. 1s2 . Secondly, it has smallest size among all the species due to less number of electrons and high effective nuclear charge.
A complex compound of Co3⁺ with molecular formula CoClxyNH₃ gives a total of three ions per molecule when dissolved in water. How many Cl⁻ ions satisfy primary as well secondary valencies in this complex?
What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?
The standard emf of the cell Zn + Cu2⁺ → Cu + Zn2 is 1.10 V at 25oC. The emf of the cell when 0.1 M Cu2⁺ and 0.1 M Zn2⁺ solutions are used will be
Which of the following element belongs to the third row transition series?
Which one of the following will undergo meta-substitution on monochlorination ?
Amongst the compounds Mg₃N₂, NH₃ and N₂O₃, nitrogen shows an oxidation state of +3 in
Reaction C₂H₅I + C₅H₁₁I + 2Na → C₂H₅ - C₅H₁₁ + 2NaI is called
Nitrogen atom has an atomic number of 7 and oxygen has an atomic number 8. The total number of electrons in a nitrate ion will be
When ammonia is passed over heated copper oxide, the metallic copper is obtained. The reaction show that ammonia is
Which of the following contains a double bond consisting of both π-bonds?
The fibre obtained by the condensation of hexamethylene diamine and adipic acid is
White phosphorus reacts with caustic soda to produce PH₃ and NaH₂PO₄. The reaction is an example for
In electrolysis of NaCl with Pt electrode is taken the H₂ is liberated at cathode while with Hg cathode it forms sodium amalgam. The reason for this is
A solution is obtained by dissolving 12 g of urea (mol.wt. 60) in one litre of water. Another solution is obtained by dissolving 68.4 g of cane sugar (mol.wt. 342) in one litre of water at same temperature. The lowering of vapour pressure in first solution is
At what temperature will the r.m.s. velocity of SO₂ be the same as that of O₂ at 303 K
Which of the following law directly explains the law of conservative of mass?