Recent questions tagged eamcet

Which one of the following statement is not correct?

asked Nov 5, 2013 by thanvigandhi_1

1 answer

Which one of the following is not a biopolymer?

asked Nov 5, 2013 by thanvigandhi_1

1 answer

Eight different letters of an alphabets are given. Words of four letters from these are formed. The number of such words with at least one letter repeated is :

asked Nov 5, 2013 by meena.p

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 :

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 :

asked Nov 5, 2013 by thanvigandhi_1

1 answer

The reagent used in the Wolff - Kishner reduction is :

asked Nov 5, 2013 by thanvigandhi_1

1 answer

The order of reactivity of Phenol (1), Nitrobenzene (2) and Benzene (3) towards nitration is :

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?

asked Nov 5, 2013 by thanvigandhi_1

1 answer

For all integers $ n \leq 1$, which of the following is divisible by 9?

asked Nov 5, 2013 by meena.p

1 answer

Which one of the following exhibits enantiomerism ?

asked Nov 5, 2013 by thanvigandhi_1

0 answers

$\sqrt {12-\sqrt {68+48 {\sqrt {2}}}}$ is equal to :

asked Nov 5, 2013 by meena.p

1 answer

If $x= \sqrt {\large\frac{2+\sqrt 3}{2 -\sqrt 3}}$, then $x^2(x-4)^2$ is equal to

asked Nov 5, 2013 by meena.p

1 answer

If $f: R \to R$ is defined by $f(x)= \left\{ \begin{array}{1 1} x+4 & \quad for & \quad x < -4 \\ 3x+2 & \quad for & \quad -4 \leq x < 4 \\ x-4 & \quad for & \quad x \geq 4 \end{array}. \right. $ then the correct matching of List I from List II is :

asked Nov 5, 2013 by meena.p

1 answer

If $f: R \to R $ is defined by $f(x)=[2x]-2[x]$ for $x \in R,$ where $[x]$ is the greatest integer not exceeding x, then the range of f is :

asked Nov 5, 2013 by meena.p

1 answer

If $f: R \to R$ is defined by $f(x) =x-[x]-\large\frac{1}{2}$ for $x \in R, $ where $[x]$ is the greatest integer not exceeding x, then $\bigg \{x \in R: f(x) =\frac{1}{2}\bigg\}$ is equal to :

asked Nov 5, 2013 by meena.p

1 answer

The number of sigma and pi $(\pi)$ bonds presents in benzene respectively are :

asked Nov 5, 2013 by meena.p

1 answer

$CH_3CH_2OH \longrightarrow CH_3CHO \longrightarrow Cl_3CCHO $ In above reactions the role of $Cl_2$ in step -I and Step-2 respectively is :

asked Nov 5, 2013 by meena.p

1 answer

Which of the following reactions does not liberate gaseous product?

asked Nov 5, 2013 by meena.p

0 answers

Eithyl chloride reacts with sodium ethoxide to form a compound A. Which of the following reactions also yields A?

asked Nov 5, 2013 by meena.p

1 answer

What are the metal ions present in carnallite?

asked Nov 5, 2013 by meena.p

1 answer

$C_6H+6+O_3 \longrightarrow \: \: \: X \: \: \: \underrightarrow{Zn/H_2O} \: \: \: Y$

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 :

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 :

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 $(e=1.6 \times 10^{-19}C\: and \: \large\frac{1}{4 \pi \varepsilon_{\circ}} = 9 \times 10^9\: N-m^2/Coulomb^2)$ :

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 :

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 ?

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 :

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:

asked Nov 4, 2013 by thanvigandhi_1

1 answer