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Recent questions tagged medium

Multiple identical copies of a template DNA are made by

asked Mar 24, 2014 by pady_1

1 answer

in order to become a part of the chromosome, the alien DNA must possess

asked Mar 24, 2014 by pady_1

0 answers

In the given circuit shown : $L= 200\;mH;$ Emp of battery $E= 12 V$ $R_1=R_2=2 \Omega$ the internal resistance of battrey is negligible . The potential drop across the inductance L after time t.

asked Mar 24, 2014 by meena.p

1 answer

Assertion & Reason types:(A)Chemical means of farming are being replaced by organic means.(R) Organic farming is more productive.

asked Mar 24, 2014 by sreemathi.v

1 answer

In the following species-area log curve

asked Mar 24, 2014 by sreemathi.v

1 answer

Equation of logistic curve is

asked Mar 24, 2014 by sreemathi.v

1 answer

In an ecosystem which one shows one way passage

asked Mar 24, 2014 by sreemathi.v

1 answer

In tropical rain forest,the soil is characterised by :-

asked Mar 24, 2014 by sreemathi.v

1 answer

A plane Electro magnetic wave of frequency $30\; MHZ$ travels in free space component of wave at a point $E= 6V/m$ along y direction . The magnetic field component B at this point would be

asked Mar 24, 2014 by meena.p

1 answer

Cuscuta's made of nutrition

asked Mar 24, 2014 by sreemathi.v

1 answer

A emf of 10V is applied in a circuit containing inductance L and resistance R. $L=5H$ and $R= 10 \;\Omega$ . The ratio of current at $t =\infty$ and $t= 1\;s$ in

asked Mar 24, 2014 by meena.p

1 answer

A uniformly would soleacidal (ie) of self inductance $8 \times 10^{-4}\;H$ and resistance $45\;L$ is broken into two identical coils. These colis are then connected in parallel across a battery of $10V$ of negligible resistance the time constant for this circuit is

asked Mar 24, 2014 by meena.p

1 answer

Suppose we are told that the acceleration $A$ of a particle moving with uniform speed $v$ in a circle of radius $r$ is proportional to some power of r, say $r^n$, and some power of v, say $v^m$. Which of the following is the simplest form of an equation for the acceleration?

asked Mar 23, 2014 by balaji.thirumalai

1 answer

A physical quantity $P$ is related to four observables $a,b,c$ and $d$ as follows $P=\large\frac{\large a^3b^2}{(\sqrt {cd})}$. The percentage error in measuring $a,b,c,d$ are $1 \%,3 \%,4 \%$ and $2 \%$ respectively. What is percentage error in calculation of $P$

asked Mar 23, 2014 by balaji.thirumalai

1 answer

Objects at rest on earth's surface move in circular paths with a period of 24 hours. What should be the length of the day so that such objects experience weightlessness, so that they are in "true orbit"

asked Mar 23, 2014 by balaji.thirumalai

1 answer

The reaction of chloroform with alcoholic $KOH$ and p-toluidine gives

asked Mar 22, 2014 by thanvigandhi_1

1 answer

The correct order of increasing basic strength of bases $NH_3, CH_3NH_2\: and\: (CH_3)_2NH$ is

asked Mar 22, 2014 by thanvigandhi_1

1 answer

Reduction of $CH_3-NC$ with Hydrogen in the presence of $pt$ or $Ni$ as catalyst gives

asked Mar 22, 2014 by thanvigandhi_1

1 answer

Unpleasant smell of carbylamines is obtained when chloroform and alcoholic $KOH$ are treated with

asked Mar 22, 2014 by thanvigandhi_1

1 answer

An organic compound (A) on reduction gives compound (B).(B) On treatement with $CHCl_3$ alcoholic potash gives (C) (C) on catalytic reduction gives N-methyl aniline.The compound A is

asked Mar 22, 2014 by thanvigandhi_1

1 answer

Among the following the strongest base is

asked Mar 22, 2014 by thanvigandhi_1

1 answer

The number of isomeric forms that are represented by the aromatic compound $C_7H_9N$ is

asked Mar 22, 2014 by thanvigandhi_1

1 answer

A $75.0\;\text{g}$ sample of a metal is heated by adding $450\;\text{J}$ of heat. If it's temperature increases from $22 ^{\circ} \text{C}$to $37 ^{\circ} \text{C}$, what is the molar mass of the metal?

asked Mar 22, 2014 by balaji.thirumalai

1 answer

A roller coaster pictured below starts at point $A$ and speeds down a curved track with speed $u$. Assume that the friction between the roller coaster and the track is negligible even though it always stays in contact with the track. What is the speed of the roller coaster at point $B$?

asked Mar 22, 2014 by balaji.thirumalai

1 answer

Identify the product $C$ in the sequence

asked Mar 21, 2014 by thanvigandhi_1

1 answer

In this sequence Z is

asked Mar 21, 2014 by thanvigandhi_1

1 answer

Which of the following is least alkaline?

asked Mar 21, 2014 by thanvigandhi_1

1 answer

Which of the following cannot couple with benzene diazonium chloride?

asked Mar 21, 2014 by thanvigandhi_1

1 answer

The reagent used in Hoffmann’s mustard oil reaction is

asked Mar 21, 2014 by thanvigandhi_1

1 answer

A inductor $(L= 50 \;mH)$ and resistor of $R =100\;\Omega$ and a battery , of emf 100 V is initially connected in series. Then the battery is short circuited , the current flowing 1 ms after the short circuit is

asked Mar 21, 2014 by meena.p

1 answer

A conducting circular loop is placed in a uniform field of $B=0.05\;T$ with its plane perpendicular to the loop. The radius of loop is made to shrink at constant rate of $0.5\;mm$ per second. The induced emf when radius is $2 \;cm$ is

asked Mar 21, 2014 by meena.p

1 answer

From 392mg of $H_2SO_4,1.204\times 10^{21}$ molecules are removed.How many moles of $H_2SO_4$ are left?

asked Mar 21, 2014 by sreemathi.v

1 answer

There are as many notes as number of oxygen atoms in 24.8g $Na_2S_2O_3.5H_2O$ (molecular weight =$248gmol^{-1})$.A note-counting machine counts 48 million notes per day.Days taken to count these notes are

asked Mar 21, 2014 by sreemathi.v

1 answer

A current $I= 10 \sin (100 \pi t)$ ampere is passed in first coil which induces a maximum emf of $5 \pi$ volts in second coil. The mutual inductance M is

asked Mar 21, 2014 by meena.p

1 answer

A circular coil of radius $30\; cm$ and resistance $\pi^{2}\;Ohms$ is rotating in a uniform magnetic field $B=10^{-2}$. Axis of rotation is diameter of coil which is perpendicular to direction of B. If Coil rotates with $200\;rpm$ the current induced in coil is

asked Mar 21, 2014 by meena.p

1 answer

A conducting rod AB of length 1 m is moving with uniform speed of $2\;m/s$ in a uniform magnetic field of 4T which is directed perpendicular to the plane of motion of the rod AB. A capacitor of capacity $C= 10\;\mu F$ is connected. The charge on the capacitor is

asked Mar 21, 2014 by meena.p

1 answer

A conducting circular loop of radius a and resistance R is kept in a horizontal plane. A vertical time varying magnetic field $B=2t$ is switched on at $t=0$ Then the flow of charge per unit time from any section of coil is

asked Mar 21, 2014 by meena.p

1 answer

An aeroplane in which the distance between the tips of using is $50\;m$ is flying horizontally with speed of $360\;km/hr$ over a place where the vertical component of earth's magnetic field is $2.0 \times 10^{-4}\;Weber /m^{2}$ The potential difference between the tips of wings will be

asked Mar 21, 2014 by meena.p

1 answer

The reaction , $3Cl_O(aq) \longrightarrow ClO_{3(ag)}^{-}+2 Cl^{-}_ {(aq)}$ is an example of

asked Mar 21, 2014 by meena.p

1 answer

In the standardization of $Nas_2S_2O_3$ using $K_2Cr_2O_7$ by iodometry , the equivalent weight of $K_2Cr_2O_7$ is

asked Mar 21, 2014 by meena.p

1 answer

Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of moles of Mohr's salt required per mole of dichromate is

asked Mar 21, 2014 by meena.p

1 answer

How many moles of electron weight one kilogram ?

asked Mar 21, 2014 by meena.p

1 answer

$2.76\;g$ of silver carbonate on being strongly heated yields a residue weighing.

asked Mar 21, 2014 by meena.p

1 answer

Which has the maximum number of atoms?

asked Mar 21, 2014 by meena.p

1 answer

Given that the abundance of isotopes $^{54}Fe, ^{56}Fe$ and $^{56}Fe$ are $5 \%, 90 \%$ and $5 \%$ respectively, the atomic mass of $Fe$ is

asked Mar 21, 2014 by meena.p

1 answer

The largest number of molecules is in

asked Mar 21, 2014 by meena.p

1 answer

An aqueous solution of $6.3\;g$ oxalic acid dihydrate is made up to $250\;ml$ . The volume of $0.1\;N\; NaOH$ required to completely neutralize 10 ml of this solution is

asked Mar 21, 2014 by meena.p

1 answer

The reaction conditions leading to the best yields of $C_2H_5Cl$ are

asked Mar 21, 2014 by sreemathi.v

1 answer

When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide evolved is

asked Mar 21, 2014 by meena.p

1 answer

Statement-1: $(p \wedge \sim q) \wedge (\sim p \wedge q)$ is a fallacy, and Statement-2 : $(p \rightarrow q) \leftrightarrow (\sim q \rightarrow \sim p)$ is a tautology. Given these two statements, which of the following is true?

asked Mar 20, 2014 by balaji.thirumalai

1 answer

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