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Recent questions tagged 2011
Questions
0.16 gms of an organic compound containing sulphur produces 0.233 gms of $BaSO_4$. Percentage of sulphur in the compound is :
jeemain
eamcet
chemistry
2011
q151
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
Which air pollutant is responsible for Bhopal gas tragedy ?
jeemain
eamcet
chemistry
2011
q150
asked
Nov 9, 2013
by
thanvigandhi_1
1
answer
Which one of the following oxides is reduced by water gas to obtain the metal during its extraction ?
jeemain
eamcet
chemistry
2011
q149
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
Identify the order in which the spin only magnetic moment ( in BM) increases for the following four ions :
jeemain
eamcet
chemistry
2011
q148
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
The hybridization of Xe and the number of lone pairs of electrons on it in $XeF_6$ are :
jeemain
eamcet
chemistry
2011
q147
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
What is the bond angle $(\hat{OCIO})$ in $CIO_2$?
jeemain
eamcet
chemistry
2011
q146
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
What are the products formed when moist chlorine gas is reacted with hypo?
jeemain
eamcet
chemistry
2011
q145
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
The total number of $ \sigma\: and \: \pi$ bonds in pyrophosphoric acid are respectively :
jeemain
eamcet
chemistry
2011
q144
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
Which one of the following is a correct set?
jeemain
eamcet
chemistry
2011
q143
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
Which one of the following statement is not correct?
jeemain
eamcet
chemistry
2011
q142
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
In which of the following reactions hydrogen is not liberated?
jeemain
eamcet
chemistry
2011
q141
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
Which property among the following is same for both hydrogen and deuterium molecules?
jeemain
eamcet
chemistry
2011
q140
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
Which one of the following gives a straight line for Freundlich adsorption isotherm?
jeemain
eamcet
chemistry
2011
q139
asked
Nov 9, 2013
by
thanvigandhi_1
1
answer
What is the entropy change in $ J.K^{-1}$ during the melting of 27.3 grams of ice at $ 0^{\circ}C$ ? (Latent heat of fusion of ice = 330 $ j.g^{-1}$)
jeemain
eamcet
chemistry
2011
q138
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
The pH of 0.05 M acetic acid is $ ( K_a = 2 \times 10^{-5} )$
jeemain
eamcet
chemistry
2011
q138
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
If the equilibrium constant for the reaction $ 2AB \rightleftharpoons A_2+B_2 \: is \: 49$, what is the equilibrium constant for $ AB \rightleftharpoons \large\frac{1}{2}\: A_2 + \large\frac{1}{2}B_2$?
jeemain
eamcet
chemistry
2011
q136
asked
Nov 9, 2013
by
thanvigandhi_1
0
answers
Which one of the following is true for an exothermic reaction $ A \rightleftharpoons B$ if $E_{r}\: and \: E_b$ are the activation energies of forward and backward reactions respectively?
jeemain
eamcet
chemistry
2011
q135
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
The number of unit cells present in 39 grams of potassium if its crystallizes as body centred cube is : ( N = Avogadro number , At.wt of potassium =39)
jeemain
eamcet
chemistry
2011
q134
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
If the values of $\land_{\infty}$ of $ NH_4CI,NaOH\: and \: NaCI$ are 130, 217 and 109 $ohm^{-1}\: .\: cm^2\: .\: equiv^{-1}$ respectively, the $ \land_{\infty}$ of $NH_4OH$ in $ ohm^{-1}\: .\: cm^2\: .\: equiv^{-1}$ is :
jeemain
eamcet
chemistry
2011
q133
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
Match the following
jeemain
eamcet
chemistry
2011
q132
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
The volume in ml. of 0.1 M solution of NaOH required to completely neutralize 100 ml. of 0.3 M solution of $H_3PO_3$ is :
jeemain
eamcet
chemistry
2011
q131
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
Which one of the following is an artificial sweetening agent ?
jeemain
eamcet
chemistry
2011
q130
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
Which one of the following statement is not correct?
jeemain
eamcet
chemistry
2011
q129
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
Which one of the following is not a biopolymer?
jeemain
eamcet
chemistry
2011
q128
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
Nitrobenzene on reduction using Zinc in alkaline medium results in 'X'. The number of sigma $ ( \sigma)$ and pi $ \pi$ bonds in 'X' is :
jeemain
eamcet
chemistry
2011
q127
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
The $pK_q$ values of four carboxylic acid are 4.76, 4.19, 0.23 and 3.41 respectively. The $pK_a$ value of strongest carboxylic acid among them is :
jeemain
eamcet
chemistry
2011
q126
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
The reagent used in the Wolff - Kishner reduction is :
jeemain
eamcet
chemistry
2011
q125
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
The order of reactivity of Phenol (1), Nitrobenzene (2) and Benzene (3) towards nitration is :
jeemain
eamcet
chemistry
2011
q124
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
Phosgene is formed slowly from which one of the following on exposure to air and sunlight?
jeemain
eamcet
chemistry
2011
q123
asked
Nov 5, 2013
by
thanvigandhi_1
1
answer
Which one of the following exhibits enantiomerism ?
jeemain
eamcet
chemistry
2011
q122
asked
Nov 5, 2013
by
thanvigandhi_1
0
answers
$C_6H+6+O_3 \longrightarrow \: \: \: X \: \: \: \underrightarrow{Zn/H_2O} \: \: \: Y$
jeemain
eamcet
chemistry
2011
q121
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
A zener diode voltage regulator operated in the range 120 - 180 V produces a constant supply of 110 V and 250 mA to the load. If the maximum current is to be equally shared between the load and zener, then the value of series resistance $(R_S)$ and load resistance (R_L)$ are :
jeemain
physics
eamcet
2011
q120
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
Two deuterium nuclei each of mass 'm' fuse together, to form a Helium nucleus, releasing an energy E . If 'c' is the velocity of light , the mass of Helium nucleus formed will be :
jeemain
eamcet
physics
2011
q119
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
When a light of photons of energy 4.2 eV is incident on a metallic sphere of radius 10 cm and work function 2.4 eV , photoelectrons are emitted. The number of photoelectrons liberated before the emission is stopped , is $(e=1.6 \times 10^{-19}C\: and \: \large\frac{1}{4 \pi \varepsilon_{\circ}} = 9 \times 10^9\: N-m^2/Coulomb^2)$ :
jeemain
eamcet
physics
2011
q118
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
When two electrons enter into a magnetic field with different velocities, they deflect in different circular paths, in such a way that the radius of one path is double that of the other $ 1 \times 10^7\: ms^{-1}$ is the velocity of the electron in smaller circle of radius $ 2 \times 10^{-3} m$ . The velocity of electron in the other circular path is :
jeemain
eamcet
physics
2011
q117
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
A long straight vertical conductor carries a current of 8 A in the upward direction. What is the magnitude of the resultant magnetic induction at a point in the horizontal plane at a distance of 4 cm from the conductor towards south ?
jeemain
eamcet
physics
2011
q116
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
A series LCR circuit is connected to a source of alternating emf 50 V and if the potential differences across inductor and capacitor are 90 V and 60 V respectively, the potential difference across resistor is :
jeemain
eamcet
physics
2011
q115
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
If $ \overline B$ is the magnetic induction, at the centre of a circular coil of radius 'r' carrying a current is 1 T then its value at a distance of $ \sqrt 3 \: r$ on the axis from the centre of the coil is:
jeemain
eamcet
physics
2011
q114
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
In the thermocouple, cold junction is at $0^{\circ}C$, hot junction is at $t^{\circ}C$. The graph drawn between thermo - emf (E) and temperature of the hot junction (t) is represented by the equation , $E=at+bt^2$. If $ a = -224b$ the neutral and the inversion temperatures of the thermocouple respectively, in degree celsius are :
jeemain
eamcet
physics
2011
q113
asked
Nov 4, 2013
by
thanvigandhi_1
1
answer
A battery of emf 'E' and internal resistance 'r' is connected to a resistor of resistance $'r_1'$ and Q Joules of heat is produced in a certain time 't'. When the same battery is connected to another resistor of resistance $'r_2'$ the same quantity of heat is produced in the same time 't'. Then, the value of 'r' is :
jeemain
eamcet
physics
2011
q112
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
In the circuit shown in figure, the ammeter shows 5 A current, voltmeter shows 250 v and the internal resistance of the voltmeter is 2500 $ \Omega$ then the value of R is :
jeemain
eamcet
physics
2011
q111
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
Consider a parallel plate capacitor of capacity 10 $ \mu\: F$ filled with air. When the gap between the plates is filled partly with a dielectric constant 4, as shown in figure.The new capacity of the capacitor is ( A is the area of plates ) :
jeemain
eamcet
physics
2011
q110
asked
Nov 2, 2013
by
thanvigandhi_1
2
answers
Four positive point chargers (+q) are kept at the four corners of a square of side 'l' . The net electric field at the midpoint of any one side of the square is , $ \bigg( take\: \large\frac{1}{4 \pi \varepsilon_{\circ}} = K \bigg)$
jeemain
eamcet
physics
2011
q109
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
A bar magnet of moment M gives a time period 'T' at a place in a vibration magnetometer. Four such similar bar magnets are placed in the frame one over the other out of which one magnet is placed with opposite polarity. The new time period is :
jeemain
eamcet
physics
2011
q108
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
P-V diagram of an ideal gas is shown in figure. Work done by the gas in the process ABCD is :
jeemain
eamcet
physics
2011
q107
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
When a liquid filled in two vessels A and B of equal volumes, is heated, the coefficients of apparent expansions of the liquids are found to be $ \gamma_1\: and \: \gamma_2$ respectively. If $ \alpha_1$ be the coefficient of linear expansion of A, then the coefficient of linear expansion of B will be :
jeemain
eamcet
physics
2011
q106
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
At $ 10^{\circ}C$, the value of the density of a fixed mass of an ideal gas divided by its pressure is 'x' . At $110^{\circ}C$ this ratio is :
jeemain
eamcet
physics
2011
q105
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
A liquid flows through two capillary tubes A and B connected in series. The length and radius of B are twice that of A. The ratio of pressure difference across A and across B is :
jeemain
eamcet
physics
2011
q104
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
The surface energy of a liquid drop is E. It is sprayed into 1000 equal droplets. Then their surface energy is
jeemain
eamcet
physics
2011
q103
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
An Aluminium and Copper wire of same cross sectional area but having lengths in the ratio 2 : 3 are joined end to end. This composite wire is hung from a rigid support and a load is suspended from the free end. If the increase in length of the composite wire is 2.1 mm , the increase in lengths of Aluminium and Copper wires are : [$ Y_{AI} = 20\times 10^{11}N/m^2\: and \: Y_{Cu} = 12 \times 10^{11} N/m^2]$
jeemain
eamcet
physics
2011
q102
asked
Nov 2, 2013
by
thanvigandhi_1
1
answer
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