Recently Active Questions

NH3 -- 107.5 PH3 -- 93.5 AsH3 -- 92 SbH3 -- 91.5 AsH3 -- 90 The H-E-H bond angle is expected to be a tetrahedral ideal of 109.5°, but since lone pairs repel more than bonding pairs, the actual angle would be expected to be s ...

X= 4SIN4X + SIN22∂ + 4 COS2{ PIE/4 - ∂/2 } AND PIE<∂ < 3PIE/2 .... FIND THE VALUE OF X...... ...

hey anyone plz can give me the link to download BITSAT 2010 paper... i need it... but nt getting from anywhere.... plz help...me... ...

*Image* ...

*Image* i am confused abt the trajectory of the block..... wht path will it follow..... the block attached with the spring is block A ...

i am uploading some basic question on NUMBER THEORY.. 1)prove that every cube number,when divided by 7,leaves remainder 0,1 or 6 2)prove that every cube number,when divided by 9,leaves remainder 0,1 or 8 3)if N is any prime g ...

If ax2-bx+c = 0 has two distinct roots lying in the interval (a,b,c) ε N , then 1. log5abc = 1 2. log6abc = 2 3. log5abc = 3 4. log6abc = 4 Find number of ordered triplets (p,q,r) where 1≤p,q,r ≤10 such that 2p+3q+5r is ...

A source S and a detector D are initially at a distance of x=1km. Both start moving towards one another with same acceleration a = 10m/s2. Frequency of source is f = 2000Hz. Find the frequency observed by the detector at time ...

What are the 3 products obtained in the following reaction? I got 2 but can't get the third one :(. Answer is given - *Image* *Image* Can someone explain the mechanism for this product? ...

what should be the value of p for the eqn (cos p -1)x2+(cosp)x+sinp=0 to have real roots ans is(-pi , 0) how come? shouldnt it be(0, pi) ...

S1S2S3......S16 are 16 players playing in a tennis tournament no of ways to form teams for doubles is ___ no of teams in which S1 and S2 are is a) same team is _______ b) different team is ______ I expect logical/mathematical ...

Can someone pls explain this .If possible with examples If af(x)>b (1)then if b>0 1)we have f(x)>logab if a>1 2)f(x)<logab if 0<a<1 (2)for a=1 , b<1 ...

Heptalene has two fused 7-membered rings and is not flat. Its twisted structure makes it chiral, but heptalene itself cannot be resolved because the two forms rapidly interconvert PROB: Please elaborate the highlighted portio ...

Q1 Define and differentiate between the two terms below: Standard reduction/oxidation potential & Discharge potential Q2 Corrosion is an example of electrolysis but any electrolysis reaction requires a minimum E.M.F. across t ...

$Q:$\Rightarrow$ Find the least positive Integral value of $a$ for which the equation\\\\ $3x^4+4x^3-12x^2+5a=0$ has no real roots. ...

can ne1 plz explain me the concept the concept of Buffer solutions..... hw to determine....the buffer of a particular solution..... ...

$Q:$\Rightarrow$ Find Max. value of The Expression $f(x,y)=x^2y-y^2x$\\\\. Where $0\leq x,y\leq1.$ ...

i have a doubt regarding why does 2-methyl propanol not give the iodoform test inspite of it being a methyl alcohol and how to recognise which methyl alcohol/ oxygen containing compound will not give iodoform test???? ...

Q1)A particle having charge 2=10^-4 C is placed directly below and at a separation of 10cm from a bob of simple pendulum at rest.The mass of the bob is 100g.What charge should the bob be given so that the string becomes loose ...

plz if any1 come to know abut any new exam fr entrances let me knw...i dnt want to miss ...

Can someone please provide me the syllabus for fiitjee talent reward exam 2010 for class Xth. Please! ...

Q- how many coulombs of charge is present on 1-g N-3 ion ? ...

When are the TIIT test series going to start please tell me.....yaar if anyone knows......??? ...

$Q:$\Rightarrow$ Find Range of $f(x)=\frac{x+2}{x^2-8x-4}.$ ...

A string 120cm in length sustains a standing wave with the points of the string at which the displacement amplitude is equal to 3.5mm being separated by 15 cm. Find the max. displacement amplitude. By drawing a figure, I got ...

a closed container of volume 0.02m3 contains mixture of neon and argon gases at a temperature 27°C.pressure 1*10^5.the total mass is 28g.if gram molecular weight of neon and argon is 20 and 40 find masses of indiviual gases. ...

A certain quantity of an organic liquid (mol. wt. 85) was introduced into an air filled flask of volume 6.5 L and sealed at Temperature of 17 degrees C and 760 mm og Hg . The flask was heated to a temperature of 307 degrees C ...

1) How many permutations of the letters a, b, c, d, e, f, g have either two or three letters between a and b? ...

1) Solve Limx→0[(1-ex) sinx/|x| ] ,where[.]represents greatest int func (A)-1 (B)1 (C)0 (D)None of these 2) Solve limx→ π/2 sinx -(sinx)sinx/1-sinx+logesinx ,(here x→ pi/2) (A)2 (B)0 (C)-1 (D)1 Pls solve!!! ...

How do we find out whether a particular compound is better oxidising/reducing agent in alkaline or acidic medium? for eg , SO2 is more powerful reducing agent in an alkaline medium than in acidic medium. how do we know this ? ...