Recent questions tagged fitb

Among the $SO_2,H_2SO_4$ and sodium thiosuphate, sulphur has the highest oxidation state in .............. .

asked Sep 12, 2013 by meena.p

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The non-metallic element present in the mineral cryolite is ............... .

asked Sep 12, 2013 by meena.p

1 answer

In the reaction $C_2O_4^{2-}+MnO^{-}_4+H^{+} \to H_2O+Mn^{2+}+CO_2$ the reductant is ............... .

asked Sep 12, 2013 by meena.p

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Chloroform reacts with $HNO_3$ ............... .

asked Sep 12, 2013 by meena.p

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The process of slow cooling of glass is called .............. .

asked Sep 12, 2013 by meena.p

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Phosgene is formed when ................. is exposed to air and sun light.

asked Sep 12, 2013 by meena.p

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If the pressure and the absolute temperature of a given mass of gas are doubled, the new volume will be ................ the initial volume.

asked Sep 12, 2013 by meena.p

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Among the alkali metals, the metal with the highest ionisation potential is ................ .

asked Sep 12, 2013 by meena.p

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The conjugate base of $HSO^-_4$ ion is ............. .

asked Sep 12, 2013 by meena.p

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The rate of diffusion of He is .............. the rate of diffusion of $CH_4$.

asked Sep 12, 2013 by meena.p

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The number of moles of barium carbonate which contains $1.5$ moles of $O_2$ atoms is .................. .

asked Sep 12, 2013 by meena.p

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When an electron in an excited hydrogen atom jumps from an energy level for which $n=5$ level for which $n=2$ the spectral line is observed in the .................. series of the hydrogen spectrum.

asked Sep 12, 2013 by meena.p

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Material getting magnetized by orientation of atomic magnetic moment in external magnetic fields are ............. .

asked Sep 11, 2013 by meena.p

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A boat is moving with a velocity $3 \hat {i}+4 \hat {j};$ with respect to ground the water in the river is moving with a velocity $-3 \hat {i}- 4 \hat {j}$ w.r.t. ground The relative velocity of boat w.r.t. water is ................ .

asked Sep 11, 2013 by meena.p

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The ratio of magnetic moments of two short magnets which give deflection in $\tan B$ position when placed at $12\;cm$ and $18\;cm$ from center of a deflection magnetometer is ................... .

asked Sep 11, 2013 by meena.p

1 answer

The acceleration due to gravity at a height (take $g=10 \;m/s^2$ on earth surface) above earth's surface is $9\;m/s^2$. It value at a point, at an equal distance below the surface of the earth is ................... $m/s^2$

asked Sep 11, 2013 by meena.p

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When boron is added as impurity to silicon, the resulting material is ................. semiconductor.

asked Sep 11, 2013 by meena.p

1 answer

Siemen is the SI unit for ............... .

asked Sep 11, 2013 by meena.p

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The distance between the eye lense and cross wire in a Ramsden eye piece, which has a field lens of focal length 1.2 cm is ................. cm.

asked Sep 11, 2013 by meena.p

0 answers

The method of connecting the negative pole of battery to $\mathit{p}\;$- material and positive pole to $\mathit{n}\;$-material of a $\mathit{p-n}\;$ junction is called .................... connection.

asked Sep 11, 2013 by meena.p

0 answers

A particle of mass $4 \;m $ which is at rest explodes into three fragments. Two of the frangements each of mass $\mathit{m}\;$ are found to move with a speed of $\mathit{v}\;$ each in mutually perpendicular direction. The total energy released in the process is ................ .

asked Sep 11, 2013 by meena.p

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If $ 4 \times 10^{20}$ eV of energy is required to move a charge of $6.25 \;C$ between two points, the PD between them is ............ volts.

asked Sep 11, 2013 by meena.p

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A simple harmonic oscillation is represented by the equation $\gamma =0.40 \sin \bigg[\large\frac{40\;t}{7}$$+0.61\bigg]$ where $\gamma$ and $\mathit{t}\;$ are in meters and seconds respectively. The value of time period is ........... sec.

asked Sep 11, 2013 by meena.p

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To minimize spherical aberration two lenses of focal length $\mathit{f_1}\;$ and $\mathit{f_2}\;$ are placed with a distance of separation equal to .................. .

asked Sep 11, 2013 by meena.p

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A body of mass $\mathit{m}\;$ thrown horizontally with velocity $\mathit{v}\;$, from the top of tower of height $\mathit{h}\;$, touches the level of ground at a distance of 250 m from the foot of the tower. A body of mass $2\mathit{m}\;$, thrown horizontally with velocity $\mathit{v/}\;2$, from the top of a tower of height $4\mathit{\;h}\;$ will touch the level ground at a distance .................. meters from the foot of the tower.

asked Sep 11, 2013 by meena.p

0 answers

When the radius of a circular current carrying coil is doubled, and current in it is halved, the magnetic dipole moment of coil originally 4 units become ............... units.

asked Sep 11, 2013 by meena.p

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If the escape velocity on earth is 11.2 km/sec, its value for a planet having double the radius and 8 times the mass of earth is .............. m/s.

asked Sep 11, 2013 by meena.p

1 answer

Five equal capacitors connected in series have a resultant capacitance of $4 \mu F$. The total energy stored in these when these are connected in parallel and charged to $400\; V$, is ................ joules.

asked Sep 11, 2013 by meena.p

0 answers

A body freely falling from rest has a velocity $\mathit{v}\;$ after it falls through a distance $\mathit{h}\;$. The distance it has to fall down further, for its velocity to become double, is .................. times $\mathit{h}\;$.

asked Sep 11, 2013 by meena.p

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In deriving Newton's formula for velocity of sound, the changes in volume of air are assumed to be ................. .

asked Sep 11, 2013 by meena.p

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A railway truck of mass $\mathit{m}\;= 2 \times 10 ^4\;kg$ travelling at $0.5\; m/s$ collides with another of half of its mass moving in opposite direction with a velocity $0.4\; m/s $. If they collide each other the combined velocity is ................... m/s.

asked Sep 11, 2013 by meena.p

0 answers

A double convex lens of $\mathit{f}\;=6$ cm is made of glass of refractive index $1.5$. The radius of curvature of the surface which is doubled that of other surface will be ................... cm.

asked Sep 11, 2013 by meena.p

0 answers

In photoelectric effect the slope of straight line graph between stopping potential and frequency of incident radiation gives the ratio of Planck constant to ................ .

asked Sep 11, 2013 by meena.p

2 answers

A ball of 1 g released down an inclined plane describes a circle of radius 10 cm in the vertical plane on reaching the bottom. The minimum height of the inclined plane is ................ cm.

asked Sep 11, 2013 by meena.p

1 answer

The resistance to be used to convert a $50\; \Omega$ resistance galvanometer of 10 mA into 500 V range voltmeter is ................. .

asked Sep 11, 2013 by meena.p

0 answers

Ice contracts on melting when subjected to pressure and the pressure is increased the melting point .................... .

asked Sep 11, 2013 by meena.p

0 answers

A body vibrating with a certain frequency sends waves of wavelength 15 cm in a medium $\mathit{A}\;$ and 20 cm in medium $\mathit{B}\;$. If $\mathit{v}\;$ of waves in $\mathit{A}\;$ is 120 m/s. That in $\mathit{B}\;$ will be ................ m/s.

asked Sep 11, 2013 by meena.p

0 answers

A car tyre has air at 1.5 atm at 300 K. If $\mathit{P}\;$ increases to 1.75 atm with $\mathit{V}\;$ same. The temperature will be ............... .

asked Sep 11, 2013 by meena.p

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From Bohr's theory when electrons jump from higher energy orbits to second orbit spectral lines that occur belongs to ................ series.

asked Sep 10, 2013 by meena.p

1 answer

The energy level stationed at the center of forbidden energy gap of an intrinsic semiconductor is .............. .

asked Sep 10, 2013 by meena.p

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If surface tension of $H_2O$ is $7.3 \times 10^{-2}\; N/m$. The excess pressure inside spherical drop of radius 1 mm is ............. $N/m^2$.

asked Sep 10, 2013 by meena.p

0 answers

A radioactive source has a half- life of 3 hours. A freshly prepared sample of the same exhibits radioactivity 16 times the permissible safe value. The minimum time after which it would be possible to work safely with the source is ............ hours.

asked Sep 10, 2013 by meena.p

1 answer

If A and B are square matrices of the same order,then $(iii)\quad [k(A-B)']=\text{________}.$

asked Apr 3, 2013 by sreemathi.v

1 answer

If A and B are square matrices of the same order,then $(ii)\quad (kA)'=\text{________}.$(k is any scalar)

asked Apr 3, 2013 by sreemathi.v

1 answer