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Q1) A man of height 2h stands in the middle of the room of length 6h. The height of the wall is 4h. What is the minimum length of a mirror to be placed on the wall in front of him so that he can see the entire wall behind him ...

d only cation present in a slight acidic sol. are Fe+3, Zn+2 and Cu+2 . d reagent dat when added in excess to this sol. would identify and separate Fe+3 in one step. a. 2 M HCl b. 6 M NH3 c. 6 M NaOH d. H2S gas ...

1) Let a,b,c,d be 4 integers such that ad is odd, & bc is even. Then, ax3+ bx2+ cx +d=0 has- A) At least 1 Irrational root. B) All 3 Irrational roots. C) All 3 Integral roots. D) None of these. 2) Let f(x)= ax2 +bx +c, a,b,c ...

1. Which one among the following pairs of ions cannot be seperated by H2S in dil HCl ? A. Bi3+,Sn4+ B. Al3+,Hg2+ C. Zn2+,Cu2+ D. Ni2+,Cu2+ (1986) 2. Hydrogen gas will not reduce (A). heated Cupric Oxide (B). heated ferric oxi ...

1.Electric field intensity at a point depends upon a)Field Charge b) Test charge c) Permittivity of medium d) (Distance between point & test charge 2. Rydberg is used as unit of a) Wave no. b) Wave length c) Energy in atomic ...

In a triangle ABC, cos2A+cos2B+cos2C=1. Then the triangle is a)right angled b) obtuse angled c)acute angled d)equilateral ...

*Image* correct ans b Post the solution..... ...

If an electrolytic solution is diluted to 9 times then its conductance a) Inc. 9 times b) Dec. 9 times c) Remains same d) none ...

The compounds used as refrigerant are -- (A). NH3 (C). CF4 (B). CCl4 (D). CF2Cl2 (E). CH2F2 A is one correct option ...

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1. A substance A decomposes by first order reaction starting initially with [A] = 2.00 M, after 200mins [A] = 0.250 M. For this reactioin what is I + 1/2 II K? 2. Calculate the equilibrium const. for the reaction Fe+2 + Ce+4 ...

le the rth term tr of a series is given by t_{r}=\frac{r}{1+r^{2}+r^{4}} then find the value of \lim_{n\rightarrow \infty }\sum_{r=1}^{n}{t}_{r} ...

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a block of wood floats in a bucket of water placed in a lift. Will the block sink more or less if the lift ... A)starts acclerating up B)moves up with a constant velocity.......please explain your answer...... ...

1. A loose thread is given a +Q charge. It immediately takes a circular shape. Why? 2. What is the increment in tension caused by placing a charge Qo at the centre of a uniformly charged ring of radius R? The ring has a unifo ...

. Let n be a positive integer and let a1, . . . , ak (k ≥ 2) be distinct integers in the set{1, . . . , n} such that n divides ai(ai+1−1) for i = 1, . . . , k−1. Prove that n does not divide ak( a1−1 ). ...

wht is the hybridisation of boron in borax? ...

1..FIND THE MIN. VALUE of A+3C/A+2+C + 4B/A+B+2C - 8C/A+B+3C (A,B,C.ε R+) 2..IF A={zεC:Z=X+Xi-1 FOR X ε R } AND MOD(Z)≤MOD(ω) FOR ω ε A THEN Z IS ...

*Image* The 50 kg homogenous smooth rests on the 30° incline and bear against the smooth vertical wall B. Find contact force at A? ...

A solid conducting sphere having a charge Q is surrounded by an uncharged concentric conducting hollow spherical shell. The potential difference between the surface of the solid sphere and the outer surface of the hollow shel ...

find all the roots of the x4+2x3+5x2+2x+1=0 ...

*Image* ans is b,c post the solution also......... ...

The 99th term of the series 2+7+14+23+34+....... is a)9999 b)9998 c)10000 d)none ...

A solid conducting sphere having a charge Q is surrounded by an uncharged concentric conducting hollow spherical shell. The potential difference between the surface of the solid sphere and the outer surface of the hollow shel ...

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The adjoining figure shows tracks of three charge particles 1, 2, and 3 in uniform electric field E Give the Signs of three charges. *Image* ...

For any acute angled \Delta ABC find the minimum value of \frac{sinA}{A}+\frac{sinB}{B}+\frac{sinC}{C} ...

A cage of 1.5 kg carries a bird of 2.5 kg inside it.when the bird starts flying in the cage the weight of the bird cage assembly is? a)4 kg b)1.5 kg c)2.5 kg d)2 kg ...

A recurrence satisfies a_{n+1} = a_n + \sqrt{a_n+a_{n+1}} a1 =1 Obtain an explicit formula for an i.e. find a function f(n) such that an = f(n) edited: first term provided now, sry. ...