Recent questions tagged eamcet

Two vectors are $( \overrightarrow A + \overrightarrow B)$ and $( \overrightarrow A - \overrightarrow B)$. The angle between their resultant vector and $ \overrightarrow A $ is :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

Match the following physical quantities with their respective dimensional formula :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

A magnet of length 10 cm and magnetic moment $1 Am^2$ is placed along the side AB of an equilateral triangle ABC. If the length of sides AB is 10 cm, the magnetic induction at point C is :

asked Nov 1, 2013 by thanvigandhi_1

2 answers

Two polarizers have their axis inclined at $ 45^{\circ}$ to each other. If unpolarized light of intensity $I_{\circ}$ is incident on the first polarizer , then the intensity transmitted light through second polarizer is :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

When a light of wavelength 4000 A in vacuum travels through the same thickness in diamond and water separately, the difference in the number of waves is 200. Find the thickness, if refractive indices of diamond and water are $ \large\frac{5}{2}\: and \: \large\frac{4}{3}$ respectively :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

A thin bi-convex lens of focal length 20 cm is made of glass of refractive index 1.5, when it is dipped in a liquid of refractive index $ \large\frac{9}{8} $, it acts as :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

A water film is formed on a glass-block. A light ray is incident on water film from air at an angle $60^{\circ}$ with the normal. The angle of incidence on glass slabs is $ \bigg[ \: given\: \mu_g = 1.5,\: \mu_W = \large\frac{4}{3} \bigg] $ :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

Two identical flutes produce fundamental notes of frequency 300 Hz at $27^{\circ}C$. If the temperature of the air in one of the flutes is increased to $31^{\circ}C$, the number of beats heard per seconds will be :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

A source of sound producing wavelength 50 cm is moving away from a stationary observer with $ \large\frac{1}{5}th$ speed of sound. Then what is the wavelength of sound heard by the observer?

asked Nov 1, 2013 by thanvigandhi_1

1 answer

The temperature of a perfect black body is $727^{\circ}C$ and its area is $0.1\: m^2$. If Stefan's constant is $ 5.67 \times 10^{-8} W/m^2K^4$, then heat radiated by it in $0.3$ minutes is :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

Two cylinders A and B, fitted with pistons. A and B contain equal moles of an ideal monoatomic gas at 400 K. Piston in A is free to move, while piston in B is held fixed. Same amount of heat is given to the gas in each cylinder. If the rise in temperature of the gas in A is 42 K, then the increase in the temperature of the gas in B is $ \bigg( \gamma = \large\frac{5}{3} \bigg) $:

asked Nov 1, 2013 by thanvigandhi_1

1 answer

Hydrolysis of $NCl_3$, gives $NH_3$ and X. Which of the following is X?

asked Oct 30, 2013 by meena.p

1 answer

When compound X is oxidised by acidified potassium dichromate, compound Y id formed. Compound Y on reduction with $LiA | H_4$ gives X.X and Y respectively are :

asked Oct 30, 2013 by meena.p

1 answer

Assertion (A) : A current of 96.5 A is passed into aqueous $AgNO_3$ solution for 100 s. The weight of silver deposited is $10.8\;g$ (At . wt. of Ag=108). Reason (R): The mass of a substance deposited during the electrolysis of an electrolyte is inversely proportional to the quantity of electricity passing through the electrolyte.

asked Oct 30, 2013 by meena.p

1 answer

Statement (S) : * influenced genes are autosomal genes in both males and females. Reasons (R) : The phenotypic expression of *-influenced genes is different in different sexes, dominant in one *** and recessive in the other.

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Which of the following statements are correct ?

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Match the following

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Which of the following reacts with benzene in presence of anhydrous aluminium chloride and forms acetophenone ?

asked Oct 30, 2013 by meena.p

1 answer

Match the following with reference to the insects and diseases :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

In the life-cycle of plasmodium vivax some stages may survive for long periods in liver as dormant stages known as :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Identify the reaction for which $\Delta H= \Delta E$

asked Oct 30, 2013 by meena.p

1 answer

Which of the following compounds when heated with $CO$ at $150^{\circ}C$ and 500 atm pressure in presence of $BF_3$ forms ethyl propionate?

asked Oct 30, 2013 by meena.p

1 answer

Observe the following statements:

asked Oct 30, 2013 by meena.p

1 answer

In diapsid skull of reptiles, the two temporal fossae are separated by these bones to form the upper temporal bar :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

What is the correct order of occurrence (% by weight) in air of Ne, Ar and Kr?

asked Oct 30, 2013 by meena.p

1 answer

The joint between carpal and metacarpal of thumb in private mammals is :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Identify the following structures which are present in dioptrical region of the ommatidium of cockroach :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Statement (S) : Nematodes exhibit 'cutely'. Reason (R) : In nematodes cell divisions cease near the end of embryonic development so that the number of the cells of the adult is constant.

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Match the following lists:

asked Oct 30, 2013 by meena.p

1 answer

The volume - temperature graphs of a given mass of an ideal gas at constant pressures are shown below. What is the correct order of pressures?

asked Oct 30, 2013 by meena.p

1 answer

when acetaldehyde is heated with Fehling solution, a red precipitate is formed. Which of the following is that?

asked Oct 30, 2013 by meena.p

1 answer

Which of the following is not correct ?

asked Oct 30, 2013 by meena.p

1 answer

Which of the products is formed when acetone is reacted with barium hydroxide solution ?

asked Oct 30, 2013 by meena.p

1 answer

At $T(K) , 100 L$ of dry oxygen is present in a sealed container. It is subjected to silent electric discharge , till the volumes of oxygen and ozone become equal. What is the volume (in liters) of ozone formed at $T(k)$?

asked Oct 30, 2013 by meena.p

1 answer

Which of the following is added to chloroform to slow down its aerial oxidation in presence of light?

asked Oct 30, 2013 by meena.p

1 answer

The concentration of oxalic acid is $'x' molL^{-1}$. 40 mL of this solution reacts with 16 mL of 0.05 M acidified $KMnO_4$. What is the pH of 'x' M oxalic acid solution ? (Assume that oxalic acid dissociate completely)

asked Oct 30, 2013 by meena.p

1 answer

The rate constant of a first order reaction at $27^{\circ}$ is $10^{-3} \min ^{-1})$. The temperature coefficient of this reaction is 2. What is the rate constant $ (in min^{-1})$ at $17^{\circ}C$ for this reaction ?

asked Oct 30, 2013 by meena.p

1 answer

Match the following

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Which of the following is not a characteristic property of chemical equilibrium?

asked Oct 30, 2013 by meena.p

1 answer

DNA polymerase for industrial use in Polymerase Chain Reaction (PCR) is produced by :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Which of the following set of variables give a straight line with a negative slope when plotted? (P= vapour pressure. T= Temperature in K)

asked Oct 30, 2013 by meena.p

1 answer

Identify the correct combinations with reference to their larval forms

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Ctenophores have the following symmetry

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Match the following

asked Oct 30, 2013 by thanvigandhi_1

1 answer

The sites of ATPase activity in flagellum/cilium are :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

In which of the following characters Prototherians resemble Metatherians?

asked Oct 30, 2013 by thanvigandhi_1

1 answer

The blood group of a woman is 'O'. She has two brothers ; one with 'A' group and the other with 'B' group. The genotypes of her parents are :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Vermicompost produced by earthworm contains Nitrogen (N) and Phosphorus (P) in this ratio :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Tassar silk is secreted by :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Conjugation in ciliate protozoans is essential for :

asked Oct 30, 2013 by thanvigandhi_1

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