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Recent questions tagged 2008
Questions
The distance travelled by a particle starting from rest and moving with an acceleration $ \large\frac{4}{3}\: ms^{-2}$, in the third second is :
aipmt
modelpaper
physics
2008
q3
asked
Dec 14, 2013
by
thanvigandhi_1
0
answers
If the error in the measurement of radius of a sphere is 2%, then the error in the determination of volume of the sphere will be :
aipmt
modelpaper
physics
2008
q2
asked
Dec 14, 2013
by
thanvigandhi_1
1
answer
Which two of the following five physical parameters have the same dimensions ?
aipmt
modelpaper
physics
2008
q1
asked
Dec 14, 2013
by
thanvigandhi_1
0
answers
A rifle of 20 kg mass can fire 4 bullets per second. The mass of each bullets per second. The mass of each bullet is $35 \times 10^{-3}\;kg$ and its final velocity is $400\;ms^{-1}.$ Then what force must be applied on the rifle so that it does not move backwards while firing the bullets?
jeemain
eamcet
physics
2008
q4
asked
Oct 22, 2013
by
meena.p
1
answer
Hydrolysis of sucrose with dilute aqueous sulfuric acid yields
jeemain
eamcet
chemistry
2008
q160
asked
Oct 22, 2013
by
meena.p
1
answer
If $\bar {M}_w$ is the weight - average molecular weight and $M_n$ is the number -average molecular weight of a polymer, the poly dispersity index (PDI) of the polymer is given by
jeemain
eamcet
chemistry
2008
q159
asked
Oct 22, 2013
by
meena.p
1
answer
The structure of the compound formed, when nitrobenzene is reduced by lithium aluminium hydride $(LiA / H_4)$ is
jeemain
eamcet
chemistry
2008
q157
asked
Oct 22, 2013
by
meena.p
1
answer
Match the following:
jeemain
eamcet
chemistry
2008
q158
asked
Oct 21, 2013
by
meena.p
0
answers
Identify $\underline A$ and $\underline B$ in the following reaction:
jeemain
eamcet
chemistry
2008
q156
asked
Oct 21, 2013
by
meena.p
0
answers
Acetone on addition to methyl magnesium bromide forms a complex, which on decomposition with acid gives $\underline {X}$ and $Mg(OH)Br$. Which one of the following is $\underline X$?
jeemain
eamcet
chemistry
2008
q155
asked
Oct 21, 2013
by
meena.p
0
answers
The IUPAC name of :
jeemain
eamcet
chemistry
2008
q154
asked
Oct 21, 2013
by
meena.p
1
answer
The correct order of reactivity of hydrogen halides with ethyl alcohol is
jeemain
eamcet
chemistry
2008
q153
asked
Oct 21, 2013
by
meena.p
1
answer
In which of the following reactions , chlorine acts as an oxidizing agent ?
jeemain
eamcet
chemistry
2008
q152
asked
Oct 21, 2013
by
meena.p
1
answer
What are $\underline X $ and $\underline Y$ respectively in the following reaction ?
jeemain
eamcet
chemistry
2008
q151
asked
Oct 21, 2013
by
meena.p
1
answer
According to Cahn- lngold- Prelog sequence rules, the correct order of priority for the given groups is :
jeemain
eamcet
chemistry
2008
q150
asked
Oct 21, 2013
by
meena.p
1
answer
Which of the following compound(s) has 'Z' configuration ?
jeemain
eamcet
chemistry
2008
q149
asked
Oct 21, 2013
by
meena.p
1
answer
Among the following compounds, which one is not responsible for depletion of layer?
jeemain
eamcet
chemistry
2008
q148
asked
Oct 21, 2013
by
meena.p
1
answer
$[C0(NH_3)_5SO_4]Br$ and $[C_0(NH_3)_5Br]SO_4$ are a pair of __________ isomers.
jeemain
eamcet
chemistry
2008
q147
asked
Oct 21, 2013
by
meena.p
1
answer
The compound in which the number of $d \pi -p\pi $ bonds are equal to those persent in $ClO_4^{-}$
jeemain
eamcet
chemistry
2008
q146
asked
Oct 21, 2013
by
meena.p
1
answer
Which one of the following reactions does not occur?
jeemain
eamcet
chemistry
2008
q145
asked
Oct 21, 2013
by
meena.p
1
answer
The number of sigma and pi bonds in peroxodisulphuric acid are , respectively
jeemain
eamcet
chemistry
2008
q144
asked
Oct 21, 2013
by
meena.p
1
answer
The correct order of reducing abilities of hydrides of V group elements is
jeemain
eamcet
chemistry
2008
q143
asked
Oct 21, 2013
by
meena.p
1
answer
Identify $\underline B$ in the following reaction :
jeemain
eamcet
chemistry
2008
q142
asked
Oct 21, 2013
by
meena.p
1
answer
Boron halides behave as Lewis acids because of their ___________ nature.
jeemain
eamcet
chemistry
2008
q141
asked
Oct 21, 2013
by
meena.p
1
answer
Which of the following statements are correct for alkali metal compounds ?
jeemain
eamcet
chemistry
2008
q140
asked
Oct 21, 2013
by
meena.p
1
answer
Which one of the following reactions represents the oxidizing property of $H_2O_2$?
jeemain
eamcet
chemistry
2008
q139
asked
Oct 21, 2013
by
meena.p
1
answer
Which one of the following graphs represents Freundlisch adsorption isotherm ?
jeemain
eamcet
chemistry
2008
q138
asked
Oct 21, 2013
by
meena.p
1
answer
Calculate $\Delta H$ in kJ for the following reaction : $C_{(s)}+O_{2(g)} \longrightarrow CO_{2(g)}$ Given that , \[ H_2 O_{(g)} + C_{(s)} \longrightarrow CO_{(g)} + H_{2(g)} +H_{2(g)} \quad \Delta H =+131\;kJ\] \[CO_{(g)}+\large\frac{1}{2} O_{2(g)} \longrightarrow CO_{2(g)} \qquad \Delta H =-282\;kJ\] \[H_{2(g)}+\frac{1}{2} \;O_{2(g)} \longrightarrow H_2O_{(g)} \qquad \Delta H =-242\;kJ\]
jeemain
eamcet
chemistry
2008
q137
asked
Oct 21, 2013
by
meena.p
1
answer
For a reversible reaction $A \rightleftharpoons B$, Which one of the following statement is wrong from the given energy profile diagram ?
jeemain
eamcet
chemistry
2008
q136
asked
Oct 21, 2013
by
meena.p
1
answer
In a 500 ml flask, the degree of dissociation of $PCl_5$ at equilibrium is $40 \%$ and the initial amount is 5 moles. The value of equilibrium constant in $mol.lit^{-1}$ for the decomposition of $PCl_5$ is
jeemain
eamcet
chemistry
2008
q135
asked
Oct 21, 2013
by
meena.p
1
answer
For a crystal, the angle of diffraction (20) is $90^{\circ}$ and the second order line has a $\underline d$ value of $2.28 A^{\circ}$.The wavelength (in $A ^{\circ}$) of $X-rays used for Bragg's diffraction is
jeemain
eamcet
chemistry
2008
q134
asked
Oct 21, 2013
by
meena.p
1
answer
When electric current is passed through acidified water for $1930\;seconds,\;1120\;ml$ of $H_2$ gas is collected (at STP) at the cathode. What is the current passed in amperes?
jeemain
eamcet
chemistry
2008
q133
asked
Oct 21, 2013
by
meena.p
1
answer
When same quantity of electricity is passed through aqueous $AgNO_3$ and $H_2SO_4$ solutions connected in series, $5.04 \times 10^{-2}\;g$ of $H_2$ is liberated. What is the mass of silver (in grams) deposited ? ( Eq wts ofHydrogen -1.008, silver =108)
jeemain
eamcet
chemistry
2008
q132
asked
Oct 21, 2013
by
meena.p
1
answer
Assertion (A) : The aqueous solution of $CH_3 COONa$ is alkaline in nature. Reason (R) : Acetate ion undergoes anionic hydrolysis.
jeemain
eamcet
chemistry
2008
q131
asked
Oct 21, 2013
by
meena.p
1
answer
$50\;ml$ of $H_2O$ is added to $50\;ml$ of $1 \times 10^{-3}\;M$ barium hydroxide solution. What is the pH of the resulting solution ?
jeemain
eamcet
chemistry
2008
q130
asked
Oct 21, 2013
by
meena.p
1
answer
Match the following :
jeemain
eamcet
chemistry
2008
q127
asked
Oct 21, 2013
by
meena.p
1
answer
When 25 grams of a non-volatile solute is dissolved in 100 grams of water, the vapour pressure is lowered by $2.25 \times 10^{-1}\;mm$ If the vapour pressure of water at $20^{\circ}$ is 17.5\;mm$ What is the molecular weight of the solute?
jeemain
eamcet
chemistry
2008
q129
asked
Oct 21, 2013
by
meena.p
1
answer
What is the temperature at which the kinetic energy of 0.3 moles of Helium is equal to the kinetic energy of $0.4$ moles of Argon at 400 k?
jeemain
eamcet
chemistry
2008
q128
asked
Oct 21, 2013
by
meena.p
1
answer
Which one of the following is a correct set?
jeemain
eamcet
chemistry
2008
q126
asked
Oct 21, 2013
by
meena.p
0
answers
The bond length of HCl molecules is $1.275\;A^{\circ}$ and its dipole moment is $1.03\;D$. The ionic character of the molecule (in percent) (charge of the electron $=4.8 \times 10^{-10}\;e.s.u)$ is
jeemain
eamcet
chemistry
2008
q125
asked
Oct 21, 2013
by
meena.p
1
answer
The atomic numbers of elements $\underline {A}, \underline {B}, \underline {C}$ and $\underline {D}$ are $z-1,z,z+=1$ and $z+2$ respectively. If '$\underline {B}$' is a noble gas, choose the correct answers from the following statements :
jeemain
eamcet
chemistry
2008
q124
asked
Oct 21, 2013
by
meena.p
1
answer
If the mass defect of , $B^{11}$ is $0.081\;amu,$ its average binding energy (in Mev) is
jeemain
eamcet
chemistry
2008
q123
asked
Oct 21, 2013
by
meena.p
1
answer
The velocities of two particles $\underline {A}$ and $\underline {B}$ are $00.05$ and $0.02\;ms^{-1}$ respectively. The mass of $\underline {B}$ is five times the mass of $\underline {A}$. The ratio of their de Broglie's wavelength is
jeemain
eamcet
chemistry
2008
q122
asked
Oct 21, 2013
by
meena.p
1
answer
An electronic transition in hydrogen atom results, in the formation of $H_{\alpha}$ line of hydrogen in Lyman series, the energies associated with the electron in each of the orbits involved in the transition (in $kCal mol^{-1}$) are
jeemain
eamcet
chemistry
2008
q121
asked
Oct 21, 2013
by
meena.p
1
answer
Which of the following statement is not correct when a junction diode is in forward bias?
jeemain
eamcet
physics
2008
q120
asked
Oct 20, 2013
by
meena.p
1
answer
$F_{pp}.F_{nn}$ and $F_{np}$ are the nuclear forces between proton- proton, neutron-neutron and neutron proton respectively . Then relation between them is
jeemain
eamcet
physics
2008
q119
asked
Oct 20, 2013
by
meena.p
1
answer
An X-ray tube produce a continuous spectrum of radiation with its shortest wavelength of $45 \times 10^{-2} A^{\circ}$. The maximum energy of a photon in the radiation in $eV$ is $(h=6.62 \times 10^{-34} \;J-sec, c= 3 \times 10^8 m/sec)$
jeemain
eamcet
physics
2008
q118
asked
Oct 20, 2013
by
meena.p
1
answer
X-rays of energy 50 KeV and scattered from a carbon target. The scattered rays are deleted at $90^{\circ}$ from the innocent beam. The percentage changes in wavelength approximately $[m_e= 9.0 \times 10^{-31}kg, c= 3 \times 19^8 m/sec]$ is
jeemain
eamcet
physics
2008
q117
asked
Oct 20, 2013
by
meena.p
1
answer
The number of turns in primary and secondary coils of a transformer is 50 and 200. If the current in the primary coil in 4A, then the current in the secondary coil is
jeemain
eamcet
physics
2008
q116
asked
Oct 20, 2013
by
meena.p
1
answer
Two concentric coils of 10 turns each are placed in the same plane. Their radii are 20 cm and 40 cm and carry 0.2 and 0.3 amp. current respectively in opposite directions. The magnetic induction (in Tesla) at the center is
jeemain
eamcet
physics
2008
q115
asked
Oct 20, 2013
by
meena.p
1
answer
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