Recent questions tagged 65

A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after $2\pi$ revolutions is :

asked Jul 8, 2019 by pady_1

1 answer

The conjugate base of $NH_2^-$ is :

asked Dec 19, 2018 by pady_1

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The unit of electrochemical equivalent are :

asked Dec 19, 2018 by pady_1

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What is the approximate quantity of electricity (in coulomb) required to deposit all the silver from $250\;mL$ of $1M\; AgNO_3$ aqueous solution ?

asked Dec 19, 2018 by pady_1

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Which one of the following ions exhibits highest magnetic moment ?

asked Dec 11, 2018 by pady_1

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Capacitance (in F) of a spherical conductor having radius 1 m, is :

asked Dec 11, 2018 by pady_1

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If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy required to remove the electron from the first excited state of $Li^{2+}$ is

asked Dec 11, 2018 by pady_1

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An alkali is titrated against an acid with methyl orange as indictor, which of the following is a correct combination ?

asked Dec 11, 2018 by pady_1

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$\Delta U$ equal to :

asked Dec 11, 2018 by pady_1

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The system of linear equations $ x + \lambda y - z = 0 $ $\lambda x - y - z =0$ $x + y - \lambda z = 0$ has a non-trivial solution for :

asked Dec 11, 2018 by pady_1

1 answer

If $A = \begin{bmatrix} 0 & -1 \\ 1& 0 \end{bmatrix}$, then which one of the following statement is not correct ?

asked Dec 11, 2018 by pady_1

1 answer

CsCl crystallises in body centred cubic lattice. If ‘a’ is its edge length then which of the following expressions is correct?

asked Dec 11, 2018 by pady_1

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Two charges, each equal to q, are kept at $x = -a$ and $x= a$ on the x-axis. A particle of mass m and charge $q_{_0} = \frac{q}{2}$ is placed at the origin. If charge $q_{_0}$ is given a small displacement ( y a) along the y-axis, the net force acting on the particle i proportional to :

asked Dec 11, 2018 by pady_1

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Which of the following compounds can be detected by Molisch's test ?

asked Dec 11, 2018 by pady_1

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The reduction potential of hydrogen half cell will be negative if :

asked Dec 11, 2018 by pady_1

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Solution of the differential equation $\cos x\; dy = y (\sin x - y) dx, \; 0 < x < \frac{\pi}{2}$ is

asked Dec 11, 2018 by pady_1

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The lines $p(p^2+1) x-y+q = 0$ and $(p^2 + 1)^2 x + (p^2+1)y + 2q = 0$ are perpendicular to a common line for

asked Nov 29, 2018 by pady_1

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In a compound atoms of element Y from ccp lattice and those of element X occupy 2/3rd of tetrahedral voids. The formula of the compound will be

asked Nov 29, 2018 by pady_1

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A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of :

asked Nov 29, 2018 by pady_1

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The IUPAC name for the complex $[Co(NO_2)(NH_3)_5]Cl_2$ is :

asked Nov 13, 2018 by pady_1

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$A$ and $B$ are two like parallel forces. A couple of moment $H$ lies in the plane of $A$ and $B$ and is contained with them. The resultant of $A$ and $B$ after combining is displaced through a distance :

asked Nov 5, 2018 by pady_1

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Two concentric coils each of radius equal to $2 \pi$ cm are placed at right angles to each other. 3A and 4A are the currents flowing in each coil respectively. The magnetic induction in $Wb/m^2$ at the centre of the coils will be : ($\mu_0 = 4 \pi \times 10^{-7} \; Wb/Am$)

asked Nov 5, 2018 by pady_1

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Consider the following statements : (a) Mode can be computed from histogram (b) Median is not independent of change of scale (c) Variance is independent of change of origin and scale. Which of these is/are correct ?

asked Nov 5, 2018 by pady_1

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Which of the following molecules represents the order of hybridisation $sp^2, sp^2, sp, sp$ from left to right atoms?

asked Aug 21, 2018 by pady_1

1 answer

Which of the following is made up of dead cells ?

asked Aug 21, 2018 by pady_1

1 answer

Blood pressure in the pulmonary artery is -

asked Aug 21, 2018 by pady_1

1 answer

The primary dentition in human differs from permanent dentition in not having one of the following type of teeth -

asked Aug 21, 2018 by pady_1

1 answer

Which of the following molecules has the maximum dipole moment?

asked Aug 20, 2018 by pady_1

1 answer

Reaction by which Benzaldehyde cannot be prepared-

asked Aug 20, 2018 by pady_1

1 answer

50 mL of each gas A and of gas B takes 150 and 200 seconds respectively for effusing through a pin hole under the similar conditions. If molecular mass of gas B is 36, the molecular mass of gas A will be ?

asked Aug 20, 2018 by pady_1

1 answer

The freezing point depression constant for water is $–1.86\;Cm^{–1}$. If $5.00 \;g$ $Na_2SO_4$ is dissolved in $45.0g\; H_2O$, the freezing point is changed by $–3.82^o C$. Calculate the Van't Hoff factor for $Na_2SO_4$

asked Aug 16, 2018 by pady_1

1 answer

For the reduction of silver ions with copper metal, the standard cell potential was found to be + 0.46 V at 25°C. The value of standard Gibbs energy. ?G° will be (F = 96500 C mol–1).

asked Jul 26, 2018 by pady_1

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Lithium metal crystallizes in a body centred cubic crystal. If the length of the side of the u cell of lithium is 351 pm, the atomic radius of lithium will be :

asked Jul 26, 2018 by pady_1

1 answer

On the basis of the following Eº values, the strongest oxidizing agent is : $[Fe(CN)_6]^{4-}\rightarrow[Fe(CN)_6]^{3-}+e^{-1},E^o=-0.35v$ $Fe^{2+}\rightarrow Fe^{3+}+e^{-1},E^o=-0.77v$

asked Jul 26, 2018 by pady_1

1 answer

The following equilibrium constants are given - The equilibrium constant for the oxidation of $NH_3$ by oxygen to give $NO$ is :

asked Jul 26, 2018 by pady_1

0 answers

The appearance of colour in solid alkali metal halides is generally due to :

asked Jul 25, 2018 by pady_1

1 answer

The absolute enthalpy of neutralisation of the reaction : $MgO(s)+2HCl(aq)\to MgCl_2(aq)+H_2O(l)$ will be:

asked Jul 24, 2018 by pady_1

1 answer

In an octahedral structure, the pair of d orbitals involved involved in $d^2sp^3$ hybridization is :-

asked Jul 24, 2018 by pady_1

1 answer

On the basis of the information available from the reaction : $\frac{4}{3} Al + O_2 \to \frac{2}{3} Al_2O_3, \Delta G = -827 \;KJ \; mol^{-1}$ of $O_2$, the minimum e.m.f required to carry out electrolysis of $Al_2O_3$ is $(F = 96500 \; C\; mol^{-1})$

asked Jul 24, 2018 by pady_1

1 answer

Which has maximum molecules : -

asked Jul 23, 2018 by pady_1

1 answer

<img src= ""/> which statement is incorrect about peptide bond :-

asked Jul 20, 2018 by pady_1

1 answer

Average molar kinetic energy of CO and $N_2$ at same temperature is :

asked Jul 20, 2018 by pady_1

1 answer

A complex compound which is formed by ligands nitrate and chloride. It gives two moles of AgCl precipitate with $AgNO_{3}$ . What will be its formulae :

asked Jun 15, 2018 by pady_1

1 answer

Fan is related to Wings in the same way as Wheel is related to

asked Dec 31, 2015 by pady_1

1 answer

Type the missing number in this sequence: 1, 3, 9, ------- , 81, 243

asked Dec 31, 2015 by pady_1

1 answer

Find the volume of a cube of side 9 cm in cubic meters.

asked Dec 31, 2015 by pady_1

1 answer

Ronald drank orange juice from a 500 ml bottle. He found that $\large\frac{2}{5}$ was remaining. How much did he drink?

asked Dec 31, 2015 by pady_1

1 answer

A merchant sold a table fan for \$ 375 at a loss of \$ 50. Find the Cost Price of a fan.

asked Dec 31, 2015 by pady_1

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