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A body revolves with constant speed v in a circular path of radius r. The magnitude of itd average acceleration during motion between two points in diametrically opposite direction is

asked Sep 24, 2019 by meena.clay6

1 answer

Four particles A,B,C and D are moving with constant speed v each. At the instant shown relative velocity of A with respect to B,C and D are in direction .

asked Sep 23, 2019 by meena.clay6

1 answer

if $\large\frac{x}{y}=\frac{2}{5}$ then find the value of $\large\frac{(x^2+y^2)}{xy}$

asked Sep 23, 2019 by meena.clay6

1 answer

The number of P-P-P angle in $ P_4$ structure is :

asked Sep 23, 2019 by meena.clay6

1 answer

The vapour pressure of two miscible liquids(A) and (B) are 300 and 500 mm of Hg are respectively . In a aflask 10 mole of (A) is mixed with 12 moles of (B) . How ever as soon as (B) is added . (A) starts polymerising into a completely insoluble solid . The polymerision follows first order kinetics. After 100 minutes ,0.525 moles of a solute is dissolved which areas the polymerization completely . The final vapour pressure of the solution is 400 mm of Hg. Estimate the rate constant of the polymerisation reaction . Assume negligible volume change on miximg and polymerisation ,and ideal behavior for the final solution

asked Sep 23, 2019 by meena.clay6

1 answer

Why halides of oxygen are not very stable?

asked Sep 23, 2019 by meena.clay6

1 answer

Why sulphur oxides are highly stable? And why Sulphur forms many oxides?

asked Sep 23, 2019 by meena.clay6

1 answer

How many optical Isomers possible for following structure of coordination compounds $(a)Ma_2b_2c_2 (b) Ma_2b_2c_2$

asked Sep 23, 2019 by meena.clay6

1 answer

Hydrogen exists as 3 isotopes -H,D,T and oxygen exists as 2 isotopes $^{16}O,^{18}$. How many radioactive water molecules are possible ?

asked Sep 23, 2019 by meena.clay6

1 answer

$2 \times (g) \to 3y(g) +2z(y)$ Calculate : (a) Order of reaction (b) Rate constant (c) Time taken for 75% completion of reaction (d) Total pressure when $P_x=700\;mm\;Hg$

asked Sep 16, 2019 by meena.clay6

1 answer

$124\;g$ of mix containing $NaHCO_3,AlCl_3,KNO_3$ requires 500 ml,8% w/w $NaOH$ soln. $[ dNaOH =1.8 gm/ml]$ for complete neutralisation . On heating same amt of mix , it shows loss in weight of 18.6 gm. Calculate % composition of mixture by moles.Weak base formed does not interfere in reaction. Assume $KNO_2$ doesn't decompose under given conditions

asked Sep 16, 2019 by meena.clay6

1 answer

What is difference between fertilisation and syngamy?

asked Sep 16, 2019 by meena.clay6

1 answer

Birds represent "class". How?

asked Sep 16, 2019 by meena.clay6

1 answer

Three pairs of jointed legs means?

asked Sep 16, 2019 by meena.clay6

1 answer

An atom of an element contains 29 electrons and 35 neutrons . Deduce (i) the number of protons and (ii) the electronic configuration of the element (iii)identify the element

asked Sep 16, 2019 by meena.clay6

1 answer

(i)Calculate the number of electrons which will together weigh one gram (ii) Calculate the mass and charge of one mole of electrons

asked Sep 16, 2019 by meena.clay6

1 answer

I bought some oranges at the rate of 4 for Rs 1. I kept 1/5 with my self and sold remaining at the rate of 3 for Rs 1 and earn profit of Rs 1.find the no of oranges I bought?

asked Sep 16, 2019 by meena.clay6

1 answer

Choose the correct option w.r.t bones involved in synovial joints

asked Sep 16, 2019 by meena.clay6

1 answer

The molal lowering of vapour pressure for water at $373^{\circ}\;K$ will be:

asked Sep 13, 2019 by meena.clay6

1 answer

The value of $2 \cos 6A-2 \cos 2A-1$ is equal to

asked Aug 14, 2019 by meena.clay6

1 answer

If $0.75\;g$ of an organic compound in Kjeldah's method neutralized of nitrogen in the compound is

asked Aug 14, 2019 by meena.clay6

1 answer

$X= 2+2^{\frac{1}{3}}+2^{\frac{2}{3}}$ , find the value of $x^3-6x^2+6x-2$

asked Aug 14, 2019 by meena.clay6

1 answer

In Rutherford scattering experiment, an $\alpha$ particle is projected with $KE=4MeV$ , maximum distance up to which this $\alpha$ particle can reach to the nucleus of Cu nucleus : (atomic number of Cu= 29)

asked Aug 13, 2019 by meena.clay6

1 answer

Solve : $\displaystyle\lim_{x \to 0} \frac{x^3-2x^2+4x-3}{4x^2-5x+1} $

asked Aug 13, 2019 by meena.clay6

1 answer

Solve : $\displaystyle\lim_{x \to 0} \bigg\{ \large\frac{\sin hx-\sin x}{x^3} \bigg\} $

asked Aug 13, 2019 by meena.clay6

1 answer

$NaCl$ crystal has a cubic structure . If the molecular weight of $NaCl$ is $58.46$ and its density is $2.17\;gm\;per\;cm^3$. Find the between two adjacent atoms and the lattice constant in Nacl crystal ?

asked Aug 13, 2019 by meena.clay6

1 answer

A current of $3A$ flows in a circuit shown in the figure. The potential difference between A and B is :

asked Aug 7, 2019 by meena.clay6

1 answer

How many lines of symmetry does a circle have??

asked Aug 7, 2019 by meena.clay6

1 answer

The value of $\sqrt[5]{(32)^{-3}}$ is :

asked Aug 7, 2019 by meena.clay6

1 answer

Ferric sulphate on heating gives sulphur trioxide . The ratio between the weights of oxygen and sulphur present in $SO_3$ obtained by heating 1 kg of ferric sulphate is $(Fe_2(SO_4)_3 \to Fe_2O_2+SO_3)$

asked Aug 7, 2019 by meena.clay6

1 answer

A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along the shorter possible path in 15 min. Find the component of resultant velocity of swimmers in perpendicular direction to river flow

asked Aug 7, 2019 by meena.clay6

1 answer

Simplify : $ \Large\frac{\sqrt{5}+\sqrt{3}}{\sqrt{5}-\sqrt{3}}+\frac{\sqrt{5}-\sqrt{3}}{\sqrt{5}+\sqrt{3}}$

asked Aug 7, 2019 by meena.clay6

1 answer

Solve : $\large\frac{1}{1+x^{(b-a)}+x^{(c-a)}}+\frac{1}{1+x^{(a-b)}+x^{(c-b)}}+\frac{1}{1+x^{(b-c)}+x^{(a-c)}}$

asked Aug 6, 2019 by meena.clay6

1 answer

The co-ordinates of a moving particles at a time t, are given by , $x=5 \sin 10t,y= 5 \cos 10t$. The speed of the particle is (in m/s) is

asked Aug 6, 2019 by meena.clay6

1 answer

Find the value of $9^{\frac{1}{3}},9^{\frac{1}{9}},9^{\frac{1}{27}}$....... upto $\infty$

asked Aug 6, 2019 by meena.clay6

1 answer

How $cosec \theta - \cot \theta=q => \therefore cosec \theta+\cot \theta=\large\frac{1}{q}$

asked Aug 6, 2019 by meena.clay6

1 answer

If $x \sin (\alpha +y)=\sin y $ and $y'=\large\frac{m}{(x^2+2nx+1)}$, then

asked Aug 6, 2019 by meena.clay6

1 answer

The equation of projectile is $y= 16x - \large\frac{x^2}{4}$ the horizontal range

asked Jul 31, 2019 by meena.clay6

1 answer

The ratio of powers dissipated respectively in R and 3R in circuit given below is

asked Jul 31, 2019 by meena.clay6

2 answers

In the figure electric field at $P_1$ is $\bar{E_1}$ and electric field at $P_2$ is $\bar{E_2}$ Find the angle between $\bar{E_1}$ and $\bar{E_2}$

asked Jul 31, 2019 by meena.clay6

1 answer

Prove that the line $2x + y = 4$ is a tangent to the circle $x^2+y^2+6x- 10y + 29= 0$.

asked Jul 31, 2019 by meena.clay6

1 answer

Find the value of $9^{\large\frac{1}{3}},9^{\large\frac{1}{9}},9^{\large\frac{1}{127}}......$upto $\infty$

asked Jul 30, 2019 by meena.clay6

1 answer

The coordinate of a moving particle at a time given by , $x= 5 \sin 10t,y=5 \cos 10t$. The speed of the particle is (in m/s)is:

asked Jul 30, 2019 by meena.clay6

1 answer

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