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Total energy of electron of hydrogen atom in ground state is -E, the potential energy of electron in first excited state is ...

equilibrium constant of HA+H2O <===> A-+H3O+ is 2×10-5, then equilibrium constant for HA+OH- <===> A-+H2O is ...

Two vessels of volume V and 3V contains two gases at 6 atm and 2 atm respectively. If the vessels are connected through a tube (negligible volume), what is the total pressure of gaseous mixture (assume no change in temperatur ...

ΣΣ(r+s)(cr+cs+crcs) 0≤r ...

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Match for 90-93 Below given are the ratio of the terms for an electron of the helium ion in first excited state to that of hydrogen in ground state v is the velocity of electron, r is the radius of orbit and E is the energy o ...

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Match for 86-89 Match Ka values 86) Benzoic acid (A) 4.2×10-5 87) p-nitrobenzoic acid (B) 6.4×10-5 88) p-chlorobenzoic acid (C) 3.62×10-4 89) p-methylbenzoic acid (D) 1.02×10-4 ...

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Match for 82-85 Match the crystal systems with the unit cells 82) Monoclinic (A) simple cubic 83) Triclinic (B) face centred 84) Orthorhombic (C) body centred 85) Cubic (D) end centred ...

Comprehension for 67-69 A white substance A reacts with dilute H2SO4 to produce a colourless gas B and a colourless solution C. The reation between B and acidified K2Cr2O7 solution produces a green solution and a slightly col ...

Which one of the following is one of the isomer of the product B? ...

How many optically isomers possible for the alkane formed? ...

Comprehension for 64-66 A compound A, C7H15Br, forms a grignard reagent with magnesium in anhydrous ether which can be hydrolysed by water and acid to give an optically active alkane C7H16. A when reacted with aqueous sodium ...

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C on acidification gives ...

Comprehension for 79-81 An alcohol A, when heated with conc. H2SO4 gives an alkene B. When B is bubbled through bromine water and the product is dehydrohalogenated with excess of sodamide, a new compound C is formed. C reacts ...

The temperature at which the reaction is going on is ...

The energy of activation for this reaction is ...

Comprehension for 76-78 The reaction given below is observed to be first order with rate constant varying as logK=14.34-1.25×104/T 2A(g)→4B(g)+C(g) Initial pressure of A is 0.16 atm.The total pressure becomes 0.28 atm ...

Further 2 g of NaOH is added to the solution, then pH is ...

6 g of NaOH is added to the above solution, pH of the solution is(no change in volume in mixing) ...