Recent questions in JEEMAIN and NEET

Which one of the following represents the correct dimensions of the coefficient of viscosity ?

asked Nov 5, 2018 by pady_1

0 answers

The smog is essentially caused by the presence of

asked Nov 5, 2018 by pady_1

0 answers

Insuline production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories ?

asked Nov 5, 2018 by pady_1

0 answers

Which of the following compound is not chairal ?

asked Nov 5, 2018 by pady_1

0 answers

Among the following compound which can be dehydrated very easily is

asked Nov 5, 2018 by pady_1

0 answers

Which of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid?

asked Nov 5, 2018 by pady_1

1 answer

Which one of the following reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon ?

asked Nov 5, 2018 by pady_1

0 answers

Acetyl bromide reacts with excess of $CH_3MgI$ followed by treatment with a saturated solution of $NH_4Cl$ given

asked Nov 5, 2018 by pady_1

1 answer

On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is

asked Nov 5, 2018 by pady_1

2 answers

The compound formed on heating chlorobenzene with chloral in the presence concentrated sulphuric acid is

asked Nov 5, 2018 by pady_1

2 answers

Which base is present in RNA but not in DNA ?

asked Nov 5, 2018 by pady_1

2 answers

Which of the following is the strongest base ?

asked Nov 5, 2018 by pady_1

1 answer

Consider the acidity of the carboxylic acids :

asked Nov 5, 2018 by pady_1

2 answers

Amongst the following compound, the optically active alkane having lowest molecular mass is

asked Nov 5, 2018 by pady_1

1 answer

Rate of the reaction is fastest when Z is

asked Nov 5, 2018 by pady_1

1 answer

Which of the folowing will have meso-isomer also ?

asked Nov 5, 2018 by pady_1

1 answer

Which one of the following does not have $sp^2$ hybridized carbon ?

asked Nov 5, 2018 by pady_1

1 answer

The IUPAC name of the compound

asked Nov 5, 2018 by pady_1

1 answer

Which one of the following has the minimum boiling point ?

asked Nov 5, 2018 by pady_1

1 answer

The ammonia evolved from the treatment of $0.30\;g$ of an organic compound for the estimation of nitrogen was passed in $100\; mL$ of $0.1\; M$ sulphuric acid. The excess of acid required $20 \; mL$ of $0.5\;M$ sodium hydroxide solution hydroxide solution for complete neutralization. The organic compound is

asked Nov 5, 2018 by pady_1

1 answer

The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is

asked Nov 5, 2018 by pady_1

1 answer

The half-life of a radioisotope is four hours. If the inital mass of the isotope was 200 g, the mass remaining after 24 hours undecayed is

asked Nov 5, 2018 by pady_1

2 answers

Consider the following nuclear reactions $^{238}_{92} M \to ^x_y N + ^4_2He$ $^x_y N \to ^A_B L + 2 \beta^+$ The number of neutrons in the elements L is

asked Nov 5, 2018 by pady_1

0 answers

The correct order of magnetic moments (spin only values in B.M.) among is (Atomic numbers : Mn = 25; Fe = 26; Co = 27 )

asked Nov 5, 2018 by pady_1

2 answers

Which one of the following has largest number of isomers ? (R - =alkyl group, en = ethylenediamine )

asked Nov 5, 2018 by pady_1

1 answer

Cerium (Z = 58) is an important member of the lanthanoids. Which of the following statements about cerium is incorrect ?

asked Nov 5, 2018 by pady_1

1 answer

Coordination compound have great importance in biological systems. In this context which of the living following statements is incorrect ?

asked Nov 5, 2018 by pady_1

1 answer

Which one of the following complexes in an outer orbital complex ?

asked Nov 5, 2018 by pady_1

1 answer

The coordination number of central metal aom in a complex is determined by

asked Nov 5, 2018 by pady_1

1 answer

Among the properties (a) reducing (b) oxidising (c) complexing, the set of properties shown by $CN^-$ ion towards metal species is

asked Nov 5, 2018 by pady_1

1 answer

Excess of $KI$ reacts with $CuSO_4$ solution and then $Na_2S_2O_3$ solution is added to it. Which of the statements is incorrect for this reaction ?

asked Nov 5, 2018 by pady_1

1 answer

The $E^{\circ}_{M^{+3}/M^{2+}}$ values for $Cr, \; Mn, \; Fe$ and $Co$ are $-0.41, \; +1.57, \; + 0.77$ and $+1.97 /;\;V$ respectively. For which one of these metals the change in oxidation state form $+2$ and $+3$ is easiest ?

asked Nov 5, 2018 by pady_1

1 answer

The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to

asked Nov 5, 2018 by pady_1

1 answer

Aluminium chloride exists as dimer, $Al_2Cl_6$ in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives

asked Nov 5, 2018 by pady_1

1 answer

Beryllium and aluminium exhibit many properties which are similar. But the two elements differ in

asked Nov 5, 2018 by pady_1

1 answer

Which one of the following ores is best concentrated by froth-floatation method ?

asked Nov 5, 2018 by pady_1

1 answer

One mole of magnesium nitride on the reaction with an excess of water gives

asked Nov 5, 2018 by pady_1

1 answer

Identify the correct statements regarding enzymes

asked Nov 5, 2018 by pady_1

1 answer

Which one the following statement regarding helium is incorrect ?

asked Nov 5, 2018 by pady_1

1 answer

In a cell that utilises the reaction $Zn(s) + 2H^+(aq) \to Zn^{2+} (aq) + H_2(g)$ addition of $H_2SO_4$ to cathode compartment, will

asked Nov 5, 2018 by pady_1

1 answer

The limiting molar conductivities $\bigwedge^{\circ}$ for $NaCl,\;KBr$ and $KCl$ are $126, \;152$ and $150\; S\; cm^2 \; mol^{-1}$ respectively. The $\bigwedge^{\circ}$ for $NaBr$ is

asked Nov 5, 2018 by pady_1

1 answer

The enthalpies of combustion of carbon and carbon monoxide are $-393.5$ and $-283 \; kJ\; mol^{-1}$ respectively. The enthalpy of formation of carbon monoxide per mole is

asked Nov 5, 2018 by pady_1

1 answer

The standard e.m.f of a cell, involving one electron change is found to be 0.591 V at $25^{\circ}C$. The equilibrium constant of the reaction is $(F = 96,500\;C\;mol^{-1} : R = 8.314 \; JK^{-1}\;mol^{-1})$

asked Nov 5, 2018 by pady_1

1 answer

The molar solubility products is $K_{sp}$. 's' is given in terms of $K_{sp}$ by the relation

asked Nov 5, 2018 by pady_1

1 answer

Consider the following $E^{\circ}$ values $E^{\circ}_{Fe^{3+}/Fe^{2+}} = 0.77V$ $E^{\circ}_{Sn^{2+}/Sn} = -0.14V$ Under standard conditions the potential for the reaction $Sn(s) + 2Fe^{3+}(aq) \to 2Fe^{2+} (aq) + Sn^{2+}(aq)$ is

asked Nov 5, 2018 by pady_1

1 answer

The rate equation for the reaction $2A + B \to C$ is found to be : rate $k[A][B]$. The correct statement in relation to this reaction is that the

asked Nov 5, 2018 by pady_1

1 answer

The equilibrium constant for the reaction $N_2(g) +O_2(g) \leftrightharpoons 2NO(g)$ at temperature $T$ is $4 \times 10^{-4}$. The value of $Kc$ for the reaction $NO(g) \leftrightharpoons \frac{1}{2} N_2 (g) + \frac{1}{2} O_2 (g) $ at the same temperature is

asked Nov 5, 2018 by pady_1

1 answer

For the reaction, $CO(g) + Cl_2 (g) \leftrightharpoons COCl_2(g) $ the $\frac{K_p}{K_c}$ is equal to

asked Nov 5, 2018 by pady_1

1 answer

What is the equilibrium expression for the reaction $P_{4(s)} + 5O_{2(g)} \leftrightharpoons P_4O_{10 (s)} $?

asked Nov 5, 2018 by pady_1

1 answer

In first order reaction, the concentration of the reactant decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is

asked Nov 5, 2018 by pady_1

1 answer

Ask Questions, Get Answers