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A stone tied to a string of length L is whirled in a vertical circle with the other end of the string at the centre. At a certain instant of time the stone is at its lowest position and has a speed u. The magnitude of the cha ...

Two particles A and B initially at rest move towards each other under a mutual force of attraction. The speed of centre of mass at the instant when the speed of A is v and the speed of B is 2v is : ...

Which one of the following IUPAC names is incorrect? ...

The IUPAC name of the compound *Image* ...

The correct IUPAC name of the compound *Image* ...

The distribution of speeds for helium atoms at different temperatures is given below: The relation between the temperatures is: ...

In the equilibrium CH3COOH + HF [C{{H}_{3}}COOH_{2}^{+}] + F– ...

The conjugate acid of HPO42– is ...

Arrange the groups [C{{H}_{3}}-,,C{{H}_{3}}C{{H}_{2}}-,,{{(C{{H}_{3}})}_{2}}CH-] and [{{(C{{H}_{3}})}_{3}}C-] in order of electron-releasing effect ...

Basic strength of [CHequiv overset{Theta }{mathop{C}},] (I), [C{{H}_{2}}=overset{Theta ,,,,}{mathop{CH}},] (II) and [C{{H}_{3}}overset{Theta ,,,,,,,}{mathop{C{{H}_{2}}}},] (III) will be in order ...

The correct order of increasing C - O bond length of, CO, CO32-, CO2 is ...

The hybridization of carbon in carbocations, carbon free radical, carbanions are respectively: ...

Strongest bond is formed by the head on overlapping of : ...

How many of the below given statements are correct: (i) Constant a is a measure of force of attraction between gas molecules and frac{{{n}^{2}}a}{{{V}^{2}}} is also called internal pressure. (ii) A is expressed in atm {{L} ...

Which of the following statements are correct for butadiene [overset{4,,,,,,,,}{mathop{C{{H}_{2}}}},=overset{3,,,,,}{mathop{CH}},-overset{2,,,,}{mathop{CH}},=overset{1,,,,,,,}{mathop{C{{H}_{2}}}},] ...

Equal mass of methane and oxygen are mixed in an empty container at {{25}^{0}}C . The fraction of the total pressure exerted by oxygen is ...

In the reaction 2A + B o {A_2}B , if the concentration of A is doubled and of B is halved, then the rate of the reaction will ...

*Image* Sir, I could not do those. Pls. help ...

What book can I follow for inorganic chemistry for JEE-Mains and Advanced? I have a magazine which has a gist of whole inorganic. Is this sufficient? ...

LET A,B,C BE AN ACUTE ANGLED TRIANGLE AND LET D,E,F BE FEET OF PERPENDICULARS FROM A,B,C RESPECTIVELY TO BC,CA,AB.LET THE PERPENDICULARS FROM F TO CB,CA,AD,BE MEET THEM IN P,Q,M,N RESPECTIVELY.PROVE THAT P,Q,M,N ARE COLLINEAR ...

*Image* ...

Its nothing ...

4 thin rods of length L and mass M are joined together to make a square. Find the moment of inertia of the system about any side. My approach:- I am finding the MI about the left side. The MI of the top and bottom rods(each) ...

If the point (x, y) be equidistant from the points (a+b, b-a) and (a-b, a+b), then ...

let (nr) denote the no. of ways to put n distinct balls in r identical boxes such that no box empty.show that (nr)=(n-1r-1)+r(n-1r-1) ...

The equation of the bisector of the acute angle between the lines 2x-y+4=0 and x-2y=1 is ...

The decomposition of N2O5 according to the equation: 2N2O5(g) → 4NO2(g) + O2(g) is a first order reaction. After 30 min. from the start of the decomposition in a closed vessel, the total pressure developed is found to be 28 ...

A certain region of soap bubble reflects red light of wavelength 650nm in vaccum.What is the minmimum thickness that this region of the bubble could have? Take μ=1.41 ...

The following reaction proceeds by which mechanism? *Image* ...

Which of these gases have a tripple bond ? ...