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A particle is restricted to move on x-axis. The particle must be moving towards origin if, A) x\frac{dx}{dt}}<0 B) x\frac{d^{2}x}{dt^{2}}<0 C) (\frac{dx}{dt})(\frac{d^{2}x}{dt^{2}})<0 D) x^{2}\frac{dx}{dt}<0 ...

1. Statement-I : Benzoic acid is a weaker acid than formic acid Statement-II : Phenyl group when attached to carbonyl group becomes electron donating. 2. Statement-I : Pb4+ can be reduced rasily to Pb2+ Statement-II : Pb2+ is ...

Q1) The function f : R → R defined by f(x)=x3+x2 is (a) one to one (b) onto (c) one to one and onto (d) neither one to one nor onto Q2) The function f(x)= x2/|x| if x is not = 0 = 0 if x=0 (a) is not continuous at x = 0 (b) ...

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A gas of temperature T is enclosed in a contained whose walls are (initially) at temperature T1. Does the gas exert a higher pressure on the walls of the container when T1<T or when T1>T? ...

1..WHICH CONFORMATION OF ETHYLENE GLYCOL IS MOST STABLE; (1)STAGGERED (2)GAUCHE (3)ANTI (4)ECLIPSED ...

hey guys i am doing arihant organic and want to know whether we have to do CHAPTER 19 (CYCLOALKANES) is it is syallabus ????of jee also do we have to do reactions of urea /.???(in chapter derivatives of -COOH )????? ...

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Argon is used in arc welding because of its A. low reactivity with metal B. ability to lower the melting point of the metal C. flammability D. high calorific value ...

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CCl4 is resistant to hydrolysis,but SiCl4 is hydrolysed ...

The material used in the solar cell contains A. Cs B. Si C. Sn D. Ti ...

1. S1 : Al(OH)3 is amphoteric in nature. S2 : Al-O and O-H bonds can be broken with equal ease in Al(OH)3. ...

When PbO2 reacts with conc HNO3,the gas evolved is (A). NO2 (B). O2 (C) N2 (D). N2O ...

Q)→The aquatic beings (like fish etc.) feel more better in water in winter time then the summer time.WHY ? ...

There is a cone with height h & radius r. An insect at the bottom edge of the con needs to complete the journey around the axis of the cone. Find the shortest distance the insect has to cover. *Image* this is the simplest pro ...

Q1) Which of the following complexing agents is used for the exact determination of end point of the titration between boric acid and NaOH? (A) EDTA (B) catechol (C) ethylene diamine (D) terpyridine Q2) How many moles of N2 w ...

the ratio of avrage translational KE to rotational KE of a linear polyatomic molecule at temprature T is 1. 3 2. 5 3. 1.5 4. 1.2 ...

Q1. The specific heat capacity of a monoatomic gas for the process TV2=constant is (where R is gas constant) (a) R/2 (b) 2R (c) R/3 (d) R/4 ...

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A point charge q is placed on one vertex of a cube. What part of the charge is inside the cube? Answer in 1/8th. Why?? ...

1. Account for the followiong a. CO2 is gas, but SiO2 is a solid b. (CCl4 is resistant to hydrolysis, but SiCl4 is hydrolysed 2. What is radius ratio ? What is its significance. ...

*Image* when the block moves on the horizontal block then work done against friction is W3... now when the block is moving on the left inclined plane, work done against friction is W1....similarly when it moves on the right i ...

1. Which of the following is least alkline *Image* 2. Formic acid when heated with H2SO4 gives (A) (COOH)2 (B) CH3COOH (C) C2H5OH (D) CO 3. Reaction H+ + OH– → H2O is— a) Very slow b) Slow c) fast d) Moderate 4. In DNA ...

Find the length of internal angle bisector CF. A) 2ab/a+b cos (C/2) B) a+b/2ab cos (C/2) C) sin (C/2) D) none of these. Plzz post the solution too.. ...

Q1. Which shows more donor properties: NF3 or PF3? EXPLAIN. Ans PF3..can't find the reason anywhere.. Q2. Give reasons why cation vacancies in some crystals make them good catalysts. Q3. Explain why: (a) TiCl2 is a high melti ...

find the angles and the side lengths of the pedal triangle of triangle ABC ....a ,b ,c as usual side lengths of triangle ABC with angle A B and C **EDITED** LEAVE IT I GOT IT ...

x = 2z2/1+z2 y = 2x2/1+x2 z = 2y2/1+y2 Find no. of real solutions to this sysytem of equations ...

Find time period of rod in both cases 1) *Image* Rod is hinged about centre...Distance a,b are measured from COM and c distance from point where string is tied 2) *Image* Rod is free to move,The strings are at extremes of rod ...