Recently Active Questions

1) 4 point masses A,B,C,D are placed at coplanar but non collinear points,If P is centre of mass of A,B,C,D ..identify correct statements a)P must lie within quad ABCD b)P must lie on a line joining any of two points A,B,C,D ...

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draw the graph of y = x+1/x-1 ...

1.someone please help me out on this type of Q: when one side of a convex lens (of some given radius of curvature) is silvered and the object distance, refractive index of glass of lens is given. And we have to find the image ...

1.)order of heat of hydrogenation: a)1-hexene b)2-hexene c)3-hexene d)1-cyclo-hexene 2.)order in which they wil ract with H+: *Image* ...

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Find the number of solutions of the system of equations : {x}+y+[z] = 2.3, [y]+{z}+x = 4.5, {y}+[x]+z=6.2 where {} and [] denote the fractional and greatest integer function respectively. Also find the solutions ...

\int_{0}^{[x]/3}{2^{\left\{3x \right\}}}dx where {} represents fractional part ...

Q1. *Image* θ = 45° (Q1) Q2. *Image* ...

A table with smooth horizontal surface is turning at an angular speed w abt its axis a groove is made on the surface along a radius and a particle is gently placed inside the groove at a distance a from the centre Find the sp ...

1. if DA=a, AB=b and CB=ka where k>0 and X,Y are the mid pts of DB and AC respt. such that |a|=17 and |XY|=4 then k is a)8/17 b)9/17 c)25/17 d)4/17 2. ax(bxc), b(cxa), cx(axb) are a)linearly dependent b)equal c)parallel d) ...

1.what will be the graph of varition of the magnitude of radial accerleration with time for a particle projected at t=0 with speed vo at an angle \Theta above the horizontal??? 2.what will be tha graph of vation of the magnit ...

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1. Light emitting diode a) emits light when forward biased b) Is made from semiconducting compound gallium arsenide c) is made of one of the two basic semi conducting material Si and Ge d) emits light when reverse biased 2. W ...

l2 + S2O3^2– ----------------> ...

Q) Hydroxide ion catalyses the reaction of piperdine with 2,4 - dinitroanisole but has no effect on the reaction of piperdine with 1-chloro , 2.4- dinitrobenzene. Explain why hydroxide ion acts as a catalyst in one reaction b ...

(1)when conc. H2SO4 was treated with K4[Fe(CN)6],CO gas was evolved .if we use dil. H2SO4 instead of conc. then the gas evolevd is ...

hybridiation is the chemists attemt to explain the observed molecular shape by constructing hybridised atomic orbitals with the appropriate inter-orbital angles.for the molecule,in which case deviation from nominal bond angle ...

1)Acetic acid to metyl bromide 2)ethyl chloride to butane 3)Aniline to bromobenzene ...

among the following substituted silanes the one which will give rise to cross linked silicon polymer on hydrolysis a)R4Si b)RSiCl3 c)R2Sicl2 d)R3sicl ...

IUPAC name of- [(NH3)5Co-NH2-Co(NH3)5](NO3)5 ...

(1) Which is the correct statement about S2 (g) molecule which forms above 1000°C? Molecular orbital theory of S2 is found to be similar to that of O2 molecule. (A) it is paramagnetic molecule having 2 unpaired electron. (b) ...

A bridge network ABCD are arranged as follows... resistances b/e terminals A-B, B-C, C-D, D-A and B-D are 10, 20, 15, 5 and 40 ohms respectively. A 20V battery of negligible internal resistance is connected b/w terminals A an ...

Q1. Two blocks of mass m and 2m respectively are placed on smooth horizontal ground connected by a spring of spring const. K. Initially the spring is unstretched. (natural length L) m is on the left and 2m is on the right m i ...

State whether the order of a chemical reaction can be negetive or not.-Explain . Cite an example . ...

Let I= ∫p/20 sinx/x dx then I lies in the interval a) (0,1) b) [0,1] c) [0, 3/2 ] d) [1,2) ...

Two identical blocks are released from the top of two fixed wedges of same height(h) and same base length (l). The speeds of the blocks when they reach the ground are related by( k is the coefficient of friction in both) (A) ...

Q1. What weight of KNO2 will be oxidised by 20ml of 0.2M KMnO4 in acidic medium? Q2. 7.45 g KCl was heated with excess MnO2 and H2SO4. The gas so produced was then passed through a solution of KI. Wt, of I2 liberated is _____ ...

1) let polynomials A(x),B(x),C(x),if dey exist satisfy for all x *Image* find polynomials A(x),B(x),C(x) 2) Find all (x,y) such that *Image* . ...

Q1) Which has highest bp? a) 1% soln C6H12O6 b) 1% soln NaCl c) 1% soln ZnSO4 d) 1% soln (NH2)2CO Q2) Weight of water in 1L of 2M NaCl soln of density 1.117g/ml is a) 1117g b) 1000g c) 117g d) 883g ...