Email

Chat with tutors

Login

Ask Questions, Get Answers

Menu X

home ask tuition questions practice papers mobile tutors pricing

X

Recent questions tagged medium

Integrate : $\int \cos (\log x)dx$

asked Dec 24, 2013 by meena.p

1 answer

Intergate : $\int \sqrt {\large\frac{x+a}{x}}$$dx$

asked Dec 24, 2013 by meena.p

1 answer

Integrate : $\int \large\frac{1}{x+\sqrt x}$$dx$

asked Dec 24, 2013 by meena.p

1 answer

Integrate : $\int \log \large\frac{[x +\sqrt {1+x^2}]}{\sqrt {1-x^2}}$$dx$

asked Dec 24, 2013 by meena.p

1 answer

Integrate : $ \int \sqrt {1+ \sin 4x}$$dx$

asked Dec 24, 2013 by meena.p

1 answer

Integrate : $\int \large\frac{7}{9} x^{3/2} \tan ^5 (x^{5/2}) \sec^2 (x^{5/2}).dx$

asked Dec 24, 2013 by meena.p

1 answer

If the line $\large\frac{x-2}{3}=\frac{y-1}{-5}=\frac{z-2}{2}$ lie in the plane $x+3y-\alpha z+\beta=0, \;\;then\:\:(\alpha,\beta)=?$

asked Dec 23, 2013 by rvidyagovindarajan_1

1 answer

Integrate : $\int \large\frac{\sin 2x }{a \cos ^2 x + b \sin ^2 x }$$dx$

asked Dec 23, 2013 by meena.p

1 answer

Integrate: $ \int \large\frac{dx}{x \sqrt {1-x^3}}$$= a \log \bigg| \large\frac{\sqrt {1-x^3}-1}{\sqrt {1-x^3}+1}\bigg|$ find the value of a

asked Dec 23, 2013 by meena.p

1 answer

Integrate : $ \int \large\frac{1}{\cos x - \sin x}$$dx$

asked Dec 23, 2013 by meena.p

1 answer

Integrate : $\int \sqrt {(\sec x -1)}.dx$

asked Dec 23, 2013 by meena.p

1 answer

Integrate : $\int a^{\large a^{\Large a^{\Large a^{x}}}}.a^{\large a^{\Large a^{x}}}.a^{a^{x}}.a^{x}$$.dx$

asked Dec 23, 2013 by meena.p

1 answer

If $( x = \sqrt {a^{\large sin^{-1}t}}, \: y = \sqrt {a^{\large cos^{-1}t}} ),$ what is the value of $\frac {\large dy}{\large dx}$

asked Dec 22, 2013 by balaji.thirumalai

1 answer

Evaluate $\large \int \frac{2\sin 2 x -\cos x }{6-\cos^2x -4\sin x }$$dx$.

asked Dec 22, 2013 by balaji.thirumalai

1 answer

If $x^y\; y^x = 100$, evaluate $\large \frac{dy}{dx}$

asked Dec 22, 2013 by balaji.thirumalai

1 answer

Evaluate: $\large \int \frac {1 + \tan^2 x} {\sqrt (1 - \tan^2 x)}\; $$dx$

asked Dec 22, 2013 by balaji.thirumalai

1 answer

Integrate : $ \int \large\frac{x^{e-1}+e^{x-1}}{x^e+e^x}$$dx$

asked Dec 21, 2013 by meena.p

1 answer

Integrate : $\int \large\frac{\sin x}{\sin (x-\alpha)}$$dx$

asked Dec 21, 2013 by meena.p

1 answer

Which of following statements is incorrect for a first order reaction, where $T_x$ is the time taken for the reactant to drop by that % number.

asked Dec 19, 2013 by sreemathi.v

1 answer

The inactivation of a viral preparation is found to be first order reaction.If in beginning $1.5\%$ of virus is inactivated then calculate time required for 50V inactivation.

asked Dec 19, 2013 by sreemathi.v

1 answer

For following data for hydrolysis of benzene diazonium chloride $C_6H_5-N=N-Cl+H_2O\rightarrow C_6H_5OH+HCl+N_2(g)$, What is the first order calculate rate constant?

asked Dec 19, 2013 by sreemathi.v

1 answer

$f'(x) = a \cos x + b \sin x ;\; f'(0)=4;\; f(0)=3;\; f \bigg(\large\frac{\pi}{2}\bigg)$$=5$. Find the value of $\;f(x)\;$?

asked Dec 19, 2013 by meena.p

1 answer

An optically active compound A upon acid catalyzed hydrolysis yield two optically active compound B & C by first order kinetics.It is given that $[\alpha_0]$ for $A,B$ & C are $60^o,40^o$ & $-80^o$ respectively.If observed both of the mixture after 20 minute was $5^o$ while after completion of the reaction it was $-20^o$.What is $t_{1/2}$ of reaction?

asked Dec 18, 2013 by sreemathi.v

1 answer

A solution of A is mixed with equal volume of a solution of B containing the same number of moles,for reaction $A+B\rightarrow C$.At the end of 1 hour,A is 75% reacted.How much of A will be left unreacted at the end of 2hours if the reaction is first order in A & zero order in B.

asked Dec 18, 2013 by sreemathi.v

1 answer

Use the data to determine rate law for reaction: $2NO+H_2\rightarrow N_2O+H_2O$

asked Dec 18, 2013 by sreemathi.v

1 answer

It take 40min for concentration of reactant in first order to drop from 0.4M to 0.3M at $25^oC$.How long it will take for reaction to be 90% complete?

asked Dec 18, 2013 by sreemathi.v

1 answer

For chemical reaction shown below.Which of following statements can be rightly assumed?

asked Dec 18, 2013 by sreemathi.v

1 answer

Consider proposed mechanism for reaction between nitrogen monoxide and hydrogen gas.Step (i):$2NO\rightarrow N_2O_2$,Step 2:$N_2O_2+H_2\rightarrow N_2O+H_2O$,Step 3:$N_2O+H_2\rightarrow N_2+H_2O$.If step 2 rate determining step,then rate law for reaction and all the intermediate of reaction will be

asked Dec 18, 2013 by sreemathi.v

1 answer

At $150^oC$ the decomposition of acetaldehyde to methane is first order reaction. If rate constant for reaction at $750^oC$ is $0.05m^{-1}$, how long does it take a concentration of $0.04\;mol\;L^{-1}$ of acetaldehyde to reduce concentration of $0.03\;mol\;L^{-1}$?

asked Dec 18, 2013 by sreemathi.v

1 answer

What is the rate constant for a reaction of $(CH_3)_3CBr$ with water is represented below :$CH_3)_3CBr+H_2O\rightarrow (CH_3)_3COH+HBr$ where the following data was obtained experimentally:

asked Dec 18, 2013 by sreemathi.v

1 answer

Consider the following reaction:- <p> Step (i): $H_2O_2+I^-\rightarrow H_2O+IO^-$, </p> <p> Step (ii): $H_2O_2+IO^-\rightarrow H_2O+O_2+I^-$, </p> then reaction intermediate will be

asked Dec 18, 2013 by sreemathi.v

1 answer

Which one of following changes would result in greatest increase in reaction rate in the following two-step mechanism?

asked Dec 18, 2013 by sreemathi.v

1 answer

Consider following reactions :(i) $H_2(g)+I_2(g)\rightarrow 2HI(g),(ii)\;2Mg(s)+O_2(g)\rightarrow 2MgO(s),(iii)\;CaCO_3(s)+2H^+(aq)\rightarrow Ca^{+2}(aq)+H_2O(l)+CO_2(g)$.When we increase surface area will increase reaction rate in

asked Dec 18, 2013 by sreemathi.v

1 answer

Consider following potential energy graph

asked Dec 17, 2013 by sreemathi.v

1 answer

Integrate : $ \int \limits_{-\frac{\pi}{2}}^{\frac{\pi}{2}} \large\frac{\log (5 - \theta \sin \theta)}{\log (5+\theta \sin \theta)}$$d \theta$

asked Dec 17, 2013 by meena.p

1 answer

The variation of PE & KE as reactant molecules approach each other can be represented by

asked Dec 17, 2013 by sreemathi.v

1 answer

Integrate : $\int \limits_0^{\frac{\pi}{2}} \large\frac{\phi(x)}{\phi (\Large\frac{\pi}{2}-x)+\phi (x)}$$dx$

asked Dec 17, 2013 by meena.p

1 answer

An activated complex has

asked Dec 17, 2013 by sreemathi.v

1 answer

If for same temperature we consider the following two reactions, then Collision I is successful and II is not because of what?

asked Dec 17, 2013 by sreemathi.v

1 answer

Integrate: $\int \limits_0^{\rho} \large\frac{y.dy}{\sqrt {y+\rho}}$

asked Dec 17, 2013 by meena.p

1 answer

Integrate: $\int \limits_0^{\rho} \large\frac{y.dy}{\sqrt {y+\rho}}$

asked Dec 17, 2013 by meena.p

0 answers

In the following reaction and graph:$2H_2O_2(l)\rightarrow 2H_2O_2+O_2(g)$, he average rate of reaction is greatest in which time period?

asked Dec 17, 2013 by sreemathi.v

1 answer

Consider the following reaction; $2H_2O_2(l)\rightarrow 2H_2O(l)+O_2(g)$ which graph shows the relation between rate of consumption of $H_2O_2$ and time?

asked Dec 17, 2013 by sreemathi.v

1 answer

For the reaction $A\;\;\;\underrightarrow{k_1}\;\;\;B\;\;\;\underrightarrow{k_2}\;\;\;C$, select the correct statement:

asked Dec 17, 2013 by sreemathi.v

1 answer

A first order reaction is 50% completed in 45 minute at $87^oC$ and in 9minutes at $127^oC$.The energy of activation of the reaction is

asked Dec 17, 2013 by sreemathi.v

1 answer

Integrate: $\int \limits_{0}^{\large\frac{\pi}{2}} \large\frac{\cos x}{(1+\sin x)(2+ \sin x)}$$ dx $

asked Dec 16, 2013 by meena.p

1 answer

Suppose f is such , that $f(-x) =-(x) $ for every real x and $\int\limits_0^1 f(x)x=5$ then $\int \limits _{-1}^0 =?$

asked Dec 16, 2013 by meena.p

1 answer

Integrate: $Un =\int \limits_0^{\large\frac{\pi}{4}} \tan ^n x dx$, find $U_n+U_{n-2}$

asked Dec 16, 2013 by meena.p

1 answer

What is the unit of k of a $n^{th}$ order reaction?

asked Dec 16, 2013 by sreemathi.v

1 answer

What is the rate of the reaction $A+B\rightarrow C$ based on the following experiments:

asked Dec 16, 2013 by sreemathi.v

1 answer

Page:

« prev
1
...
111
112
113
114
115
116
117
...
149
next »

Feedback Terms Facebook Twitter About Us

Your payment for is successful.

...