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Recent questions in Chemistry
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EAMCET
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Chemistry
The concentration of oxalic acid is $'x' molL^{-1}$. 40 mL of this solution reacts with 16 mL of 0.05 M acidified $KMnO_4$. What is the pH of 'x' M oxalic acid solution ? (Assume that oxalic acid dissociate completely)
jeemain
eamcet
chemistry
2006
q20
asked
Oct 30, 2013
by
meena.p
1
answer
The rate constant of a first order reaction at $27^{\circ}$ is $10^{-3} \min ^{-1})$. The temperature coefficient of this reaction is 2. What is the rate constant $ (in min^{-1})$ at $17^{\circ}C$ for this reaction ?
jeemain
eamcet
chemistry
2006
q19
asked
Oct 30, 2013
by
meena.p
1
answer
Which of the following is not a characteristic property of chemical equilibrium?
jeemain
eamcet
chemistry
2006
q18
asked
Oct 30, 2013
by
meena.p
1
answer
Which of the following set of variables give a straight line with a negative slope when plotted? (P= vapour pressure. T= Temperature in K)
jeemain
eamcet
chemistry
2006
q17
asked
Oct 30, 2013
by
meena.p
1
answer
$AB$ is an ionic solid. The ionic radii of $A^{+}$ and $B^{-}$ are respectively $r_c$ and $r_a$. Lattice energy of AB is proportional to :
jeemain
eamcet
chemistry
2006
q16
asked
Oct 30, 2013
by
meena.p
1
answer
Electronlysis of X gives Y at anode. Vacuum distillation of Y gives $H_2O_2$. The number of peroxy (O-O) bonds present in X and Y respectively are :
jeemain
eamcet
chemistry
2006
q15
asked
Oct 30, 2013
by
meena.p
1
answer
The disperse phase, dispersion medium and nature of colloidal solution (lyophilic or lyophobic) of 'gold sol' respectively are :
jeemain
eamcet
chemistry
2006
q14
asked
Oct 30, 2013
by
meena.p
1
answer
$CFCl_3$ is responsible for the decomposition of ozone to oxygen. Which of the following reacts with ozone to from oxygen?
jeemain
eamcet
chemistry
2006
q13
asked
Oct 30, 2013
by
meena.p
1
answer
What is the time (in sec) required for depositing all the silver present in $125\;mL$ of $1\; M \;AgNO_3$ solution by passing a current of 241.25 A ? (IF=96500 coulombs)
jeemain
eamcet
chemistry
2006
q12
asked
Oct 30, 2013
by
meena.p
1
answer
The energy of a photon is $3 \times 10^{-12}$ ergs. What is its wavelength in nm? $(h= 6.62 \times 10^{-27} ergs, c=3 \times 10^{10}cm/s)$
jeemain
eamcet
chemistry
2006
q11
asked
Oct 30, 2013
by
meena.p
1
answer
The uncertainties in the velocities of two particle A and B are $0.05$ and $0.02\;m/s^{-1}$ respectively. The mass of B is five times to that of mass A. What is the ratio of uncertainties $\bigg(\large\frac{\Delta x_A}{\Delta x_B}\bigg)$ in their positions ?
jeemain
eamcet
chemistry
2006
q10
asked
Oct 30, 2013
by
meena.p
1
answer
Which of the following statements is not correct ?
jeemain
eamcet
chemistry
2006
q9
asked
Oct 30, 2013
by
meena.p
1
answer
Which of the following regents when heated with ethyl chloride, forms ethylene?
jeemain
eamcet
chemistry
2006
q8
asked
Oct 29, 2013
by
meena.p
1
answer
Observe the following statements:
jeemain
eamcet
chemistry
2006
q7
asked
Oct 29, 2013
by
meena.p
1
answer
Which of the following reactions an produce aniline as main product?
jeemain
eamcet
chemistry
2006
q6
asked
Oct 29, 2013
by
meena.p
1
answer
Which of the following is not correct?
jeemain
eamcet
chemistry
2006
q5
asked
Oct 29, 2013
by
meena.p
1
answer
Which of the following is used for making optical instruments?
jeemain
eamcet
chemistry
2006
q4
asked
Oct 29, 2013
by
meena.p
1
answer
A molecule (X) has (i) four sigma bonds formed by the overlap of $sp^2$ and orbitals (ii) one sigma bond formed by $sp^2$ and $sp^2$ orbitals and (iii) one $\pi$ bond formed by $P_x$ and $P_z$ orbitals. Which of the following is X?
jeemain
eamcet
chemistry
2006
q3
asked
Oct 29, 2013
by
meena.p
1
answer
what is the correct order of spin only magnetic moment (in BM) of $Mn^{2+},Cr^{2+}$ and $ V^{2+}?$
jeemain
eamcet
chemistry
2006
q2
asked
Oct 29, 2013
by
meena.p
1
answer
The standard reduction potentials of $Zn^{2-} |Zn,Cu^{2+}|Cu$ and $Ag^{+} | Cu\;and\;Ag^{+}|Ag$ are respectively $-0.76,0.34$ and $0.8\;V$. The following cells were constructed :
jeemain
eamcet
chemistry
2006
q1
asked
Oct 29, 2013
by
meena.p
1
answer
Which one of the following statement is correct for an electrolyte solution when its concentration is decreased?
jeemain
eamcet
chemistry
2012
q160
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
The synthetic semi permeable membrane used in Berkeley-Hartley method is
jeemain
eamcet
chemistry
2012
q159
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
Which one of the following solutions has a lowest freezing point?
jeemain
eamcet
chemistry
2012
q158
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
Which one of the following gases has the same RMS velocity at $ 27^{\circ}C$ as that of $N_2$ with RMS velocity of $ 5.0 \times 10^4\: cm.s^{-1}$ at $ 7^{\circ}C$?
jeemain
eamcet
chemistry
2012
q157
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
Which one of the following is an example for disproportionation reaction?
jeemain
eamcet
chemistry
2012
q156
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
Which one of the followng is correct regarding $ \sigma $ molecular orbital?
jeemain
eamcet
chemistry
2012
q155
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
Which one of the following is not correct?
jeemain
eamcet
chemistry
2012
q154
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
Assertion (A) : In the formation of oxide ion, $ O^{2-}(g) $ , first an exothermic reaction and then an endothermic reaction takes place. Reasons (R) : $O^- $ ion has comparatively large size than oxygen atom.
jeemain
eamcet
chemistry
2012
q153
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
in the wave numbers of the first ( lowest ) two lines of a series of hydrogen atomic spectrum is $ 5331.7\: cm^{-1}$, they belong to the $(R_H = 109680\: cm^{-1}$)
jeemain
eamcet
chemistry
2012
q152
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
The first spectral line in the Pfund series of Hydrogen spectrum is given by $(R_H$ = Rydberg constant )
jeemain
eamcet
chemistry
2012
q151
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
Which reaction produces $SO_2$?
jeemain
eamcet
chemistry
2012
q150
asked
Oct 24, 2013
by
thanvigandhi_1
0
answers
An oxide of nitrogen (X) is formed when Z is reacted with $P_2O_5$. X is soluble in water and gives Z. Which one of the following is Z?
jeemain
eamcet
chemistry
2012
q149
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
The reaction that gives $CO_2$ as one of the product is
jeemain
eamcet
chemistry
2012
q148
asked
Oct 24, 2013
by
thanvigandhi_1
0
answers
Which of the following statements are correct?
jeemain
eamcet
chemistry
2012
q147
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
The reaction which does not liberate hydrogen is
jeemain
eamcet
chemistry
2012
q146
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
Which one of the following reactions does not correspond to the preparation of "synthetic gasoline" during the Fischer-Tropsch process?
jeemain
eamcet
chemistry
2012
q145
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
The equilibrium constant for the reaction $SO_2 (g)+\large\frac{1}{2}$$ O_2 (g) \rightleftharpoons SO_3(g)$ is $5 \times 10 ^{-2}\;atm$ The equilibrium consant of the reaction $250_3(g) \rightleftharpoons 2SO_2(g) +O_2 (g) $ would be
jeemain
eamcet
chemistry
2007
q40
asked
Oct 24, 2013
by
meena.p
1
answer
Enthalpy of chemical absorption, $ \Delta\: H$ in $kJ\: mol^{-1}$ is in the range of
jeemain
eamcet
chemistry
2012
q144
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
For a reaction to be spontaneous at all temperatures
jeemain
eamcet
chemistry
2012
q143
asked
Oct 24, 2013
by
thanvigandhi_1
1
answer
Which of the following is not correct?
jeemain
eamcet
chemistry
2007
q39
asked
Oct 24, 2013
by
meena.p
1
answer
Among the following, which is water insoluble ?
jeemain
eamcet
chemistry
2007
q38
asked
Oct 24, 2013
by
meena.p
1
answer
Calorific value of producer gas is low because of
jeemain
eamcet
chemistry
2007
q37
asked
Oct 24, 2013
by
meena.p
1
answer
Which of the following is not a peroxy acid?
jeemain
eamcet
chemistry
2007
q36
asked
Oct 24, 2013
by
meena.p
1
answer
Bhopal gas tragedy of 1984 was caused by
jeemain
eamcet
chemistry
2007
q35
asked
Oct 24, 2013
by
meena.p
1
answer
Aqueous solution of an organic compound. $'A'$ on electrolysis liberates acetylene and $CO_2$ at anode. $'A'$ is
jeemain
eamcet
chemistry
2007
q34
asked
Oct 24, 2013
by
meena.p
1
answer
An organic compound 'X' on treatment with pyridinium chloro chromate in dichloromethane gives compound 'y'. Compound 'y', reacts with $l_2$ and alkali to form triiodomethane. The compound 'X' is
jeemain
eamcet
chemistry
2007
q33
asked
Oct 24, 2013
by
meena.p
1
answer
Nitro benzene on reduction with zinc and $NH_4 CL$ gives
jeemain
eamcet
chemistry
2007
q32
asked
Oct 24, 2013
by
meena.p
1
answer
Which of the following biomolecules acts as specific catalysts in biological reaction ?
jeemain
eamcet
chemistry
2007
q31
asked
Oct 24, 2013
by
meena.p
1
answer
Calculate the emf of the cell $ Cu(s)|Cu^{2+} (aq)| |Ag^{+}(aq)| Ag(s) $ Given $E^{\circ}_{Cu^{2+}/Cu} =+0.34 \;V, E^{\circ}_{Ag^{+}/Ag}=0.80\;V$
jeemain
eamcet
chemistry
2007
q30
asked
Oct 24, 2013
by
meena.p
1
answer
A certain mass of a gas occupies a volume of $2L$ at STP. To what temperature the gas must be heated to double its volume, keeping the pressure constant ?
jeemain
eamcet
chemistry
2007
q29
asked
Oct 24, 2013
by
meena.p
1
answer
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