Recent questions tagged easy

Which one of the following oxides is expected to exhibit paramagnetic behavior?

asked Dec 6, 2013 by sreemathi.v

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The bond order of $[He_2]^{4-}$ is

asked Dec 6, 2013 by sreemathi.v

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In which case electron from bonding molecular orbital is removed?

asked Dec 6, 2013 by sreemathi.v

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$BrO_3^-$ is isostructural with a noble gas species

asked Dec 6, 2013 by sreemathi.v

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The number of anti-bonding electrons in CO molecules is

asked Dec 6, 2013 by sreemathi.v

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In allene, hybridization of the central and terminal carbons, respectively, are

asked Dec 6, 2013 by sreemathi.v

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Which of the following molecule exhibits the largest bond angle?

asked Dec 6, 2013 by sreemathi.v

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Molecular orbital theory predicts the $F_2^{2+}$ ion has a bond order of

asked Dec 6, 2013 by sreemathi.v

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The number of electrons in the $\sigma$ 2p molecular orbital in $N_2^+$ is

asked Dec 6, 2013 by sreemathi.v

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The hybridisation and shape of the $[Pt(Cl)_4]^{2-}$ is

asked Dec 6, 2013 by sreemathi.v

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In which physical state of a compound, the magnitude of hydrogen bonding is very high

asked Dec 6, 2013 by sreemathi.v

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In $C_2H_5OH$, which type of hydrogen bond can be observed

asked Dec 6, 2013 by sreemathi.v

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In most stable structure of $ClF_3$ molecule, how many lone pairs are there in equatorial positions

asked Dec 6, 2013 by sreemathi.v

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The number of $\pi-$bonds in ethane, ethene and ethyne are respectively

asked Dec 6, 2013 by sreemathi.v

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According to VSEPR theory, which of the following is non-linear molecule

asked Dec 6, 2013 by sreemathi.v

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A body is given translational velocity and kept on a surface that has sufficient friction. Then

asked Dec 5, 2013 by meena.p

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A sphere is released on a smooth inclined plane from the top. When it moves down its angular momentum is

asked Dec 5, 2013 by meena.p

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A sphere S rolls without slipping, moving with constant speed on a plank p. The friction between the upper surface of P and the sphere is sufficient to prevent slipping, While the lower surface of p is smooth and rest on the ground. Initially P is fixed to the ground by a pin N. If N is suddenly removed :

asked Dec 5, 2013 by meena.p

1 answer

$|\overrightarrow a\times\overrightarrow b|^2= ?$ (which one of the following )

asked Dec 3, 2013 by rvidyagovindarajan_1

1 answer

If $\overrightarrow a=\hat i+\hat j+\hat k,\:\overrightarrow b=\hat i\:\:and\:\:\overrightarrow c=x\hat i-\hat j+\hat k$, then the value of $x$ for which $\overrightarrow a\:\overrightarrow b\:and\:\overrightarrow c$ are coplanar is ?

asked Dec 1, 2013 by rvidyagovindarajan_1

1 answer

If $\overrightarrow a,\:\overrightarrow b\:and\:\overrightarrow c$ are non coplanar vectors and if $\overrightarrow a'=\large\frac{\overrightarrow b\times \overrightarrow c}{[\overrightarrow a\:\overrightarrow b\:\overrightarrow c]},\:\overrightarrow b'=\large\frac{\overrightarrow c\times \overrightarrow a}{[\overrightarrow a\:\overrightarrow b\:\overrightarrow c]},\:and \:\overrightarrow c'=\large\frac{\overrightarrow a\times \overrightarrow b}{[\overrightarrow a\:\overrightarrow b\:\overrightarrow c]},$ then $\overrightarrow a.\overrightarrow a'+\overrightarrow b.\overrightarrow b'+\overrightarrow c.\overrightarrow c'=?$

asked Nov 29, 2013 by rvidyagovindarajan_1

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For any vector $\overrightarrow a\:\:and\:\:\overrightarrow b$ the angle between $|\overrightarrow a|\overrightarrow b+|\overrightarrow b|\overrightarrow a$ and $|\overrightarrow a|\overrightarrow b-|\overrightarrow b|\overrightarrow a$ is ?

asked Nov 29, 2013 by rvidyagovindarajan_1

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If the vectors $p\hat i+\hat j+\hat k,\:\hat i+q\hat j+\hat k,\: \:and\:\:\hat i+\hat j+r\hat k$ $(p\neq q\neq r\neq 1)$ are three coplanar vectors then the value of $pqr-(p+q+r)=?$

asked Nov 29, 2013 by rvidyagovindarajan_1

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As shown in the figure , auniform disc of mass m is rolling without slipping with an angular velocity w. The portion AB is rough and BC is smooth. When it crosses the point B disc will be in

asked Nov 29, 2013 by meena.p

1 answer

A uniform disc is performing pure rolling on a smooth stationary surface with constant angular velocity. At any instant, for the lower most point of the disc

asked Nov 29, 2013 by meena.p

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If a spherical ball rolls with out slipping, the fraction of its total energy associated with rotation is

asked Nov 29, 2013 by meena.p

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A disc can roll without slipping , with out applying any external force on a 1) rough inclined plane 2) smooth inclined plane 3) rough horizontal surface 4) smooth horizontal surface

asked Nov 29, 2013 by meena.p

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A thin string is wrapped several times around a cylinder kept on a rough horizontal surface. A boy standing at a distance l from the cylinder draws the string towards him as shown. The cylinder rolls without slipping . The length of the string passed through the hand of the boy while the cylinder reaches his hand is

asked Nov 29, 2013 by meena.p

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Consider a disc rolling with out slipping on a horizontal surface at a speed V as shown in figure. 1) the speed of the particle at A is 2V. 2) the speed of the particle and B,C and D is equal to V 3) The speed of C is zero and the speed of B is $\sqrt 2$ V 4) the speed of 0 is less then the speed of V which is the correct answer?

asked Nov 29, 2013 by meena.p

1 answer

Angular momentum of the particle rotating with a central force is constant due to

asked Nov 28, 2013 by meena.p

1 answer

A conical pendulum consists of a simple pendulum moving in a horizontal circle as shown. $C$ is the pivot. $0$ is the centre of the circle in which the pendulum bob moves and w the constant angular velocity of the bob. If $\overrightarrow {L} $ is the angular momentum about the axis $C_0$, then

asked Nov 28, 2013 by meena.p

1 answer

A conical pendulum consists of a simple pendulum moving in a horizontal circle as shown. C is the pivot. O is the centre of the circle in which the pendulum bob moves and w the constant angular velocity of the bob. If $\overrightarrow {L} $ is the angular momentum about C, then

asked Nov 28, 2013 by meena.p

1 answer

In the absence of external force acting n a rigid system, which of the following must remain constant 1) angular momentum 2) linear momentum 3) moment of inertia 4) kinetic energy Which one is the correct answer ?

asked Nov 28, 2013 by meena.p

1 answer

A conical pendulum consists of a simple pendulum moving in a horizontal circle as shown. C is the pivot . O is the circle in which the pendulum moves.and $w_1$ the angular velocity of the bob. If L is the angular momentum about C, then

asked Nov 28, 2013 by meena.p

1 answer

Angular momentum of a particle rotating with a centre force is constant due to

asked Nov 28, 2013 by meena.p

1 answer

A particle of mass 2 kg is moving with velocity $2 \hat i + 3\hat j $. Its angular momentum about the origin when the particle is at $(1,1,0)$

asked Nov 28, 2013 by meena.p

1 answer

A particle of mass m starts from origin with constant velocity $u \hat i$. What will be the angular momentum of the speed increases in the above case?

asked Nov 28, 2013 by meena.p

1 answer

A particle of mass m starts from origin with constant velocity $u \hat i$. What will be the angular momentum at a later instant.

asked Nov 28, 2013 by meena.p

1 answer

A particle of mass m starts from origin with constant velocity $u \hat i$. Its angular momentum about the origin is

asked Nov 28, 2013 by meena.p

1 answer

The $pK_a$ of weak acid (HA) is 4.5 . The $pOH$ of an aqueous buffered solution of HA in which 50% of acid is ionized is

asked Nov 27, 2013 by mosymeow_1

1 answer

Which of the following ionic species has the greatest protons affinity to form stable compound?

asked Nov 27, 2013 by mosymeow_1

2 answers

The solubility of $A_2X_3$ is y mol $dm^{-3}$. Its solubility product is

asked Nov 27, 2013 by mosymeow_1

1 answer

The $pH$ of $\frac{M}{100}$ NaOH solution is:

asked Nov 27, 2013 by mosymeow_1

1 answer

$K_{sp}$ of $Mg(OH)_2$ is $1 \times 10^{-12}$, 0.01 M $Mg^{+}$ will precipitate at the limiting $pH$ of

asked Nov 27, 2013 by mosymeow_1

1 answer

What is the correct relationship between the $pH$s of isomolar solutions of sodium oxide ($pH_1$), sodium sulphide ($pH_2$), sodium selenide ($pH_3$) and sodium telluride ($pH_4$)?

asked Nov 27, 2013 by mosymeow_1

1 answer

The $pH$ value of gastric juice in human stomach is about 1.8 and in the small intestine it is about 7.8. The $pK_a$ value of aspirin is 3.5. Aspirin will be

asked Nov 27, 2013 by mosymeow_1

1 answer

To 10 mL of aqueous solution some strong acid having $pH$ = 2 is mixed with $pH$ = 4.0. The $pH$ of resulting solution is

asked Nov 27, 2013 by mosymeow_1

1 answer

The $pH$ of 0.1 M solution of $NH_4OH$ (having dissociation constant $K_b = 1.0 \times 10^{-5})$ is equal to

asked Nov 27, 2013 by mosymeow_1

1 answer

A solution was prepared by dissolving 0.0005 mol of $Ba(OH)_2$ in 100 mL of the solution. If the base is assumed to ionise completely, the $pOH$ of the solution will be

asked Nov 27, 2013 by mosymeow_1

1 answer

The $pH$ of a solution is 5.00. To this solution, sufficient acid is added to lower the $pH$ to 2.00. The corresponding increase in $H_3O^+$ ion concentration is

asked Nov 27, 2013 by mosymeow_1

1 answer

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