Sunday

April 20, 2014

April 20, 2014

Total # Posts: 16

**dual nature of matter & radiation**

Light of frequency 1.5 times the threshold frequency is incident on photo-sensitive material.If the frequency is halved & intensity is doubled,the photo current becomes 1. Quadrupled 2. Doubled 3. Halved 4. Zero

**chemistry**

the quantity of electricity required to reduce 12.3g of nitrobenzene to aniline assuming 50% current efficiency is 1. 115800 C 2. 57900 C 3. 231600 C 4. 28950 C

**chemistry**

A current of 0.965 A is passed through 500 ml of 0.2 M solution of ZnSO4 for 10 min. The molarity of Zn 2+ after deposition of Zn is 1. 0.1M 2. 0.5M 3. 0.8M 4. 0.194M

**chemistry**

A current of 0.965 A is passed through 500 ml of 0.2 M solution of ZnSO4 for 10 min. The molarity of Zn2+ after deposition of Zn is 1. 0.1M 2. 0.5M 3. 0.8M 4. 0.194M

**chemistry**

the ground stste energy of H- atom is -13.6 eV. the energy needed to ionise H- atom from its second excited state is 1.51 eV 3.4 eV 13.6 eV 12.1 eV

**physics**

two small objects of masses 'm' & '2m' each are attaached to the ends of a light rigid rod of length 'L' . the rod is pivoted at a point where centre of mass of the two objects lie. the moment of inertia of the arrangement about an axis through the cent...

**physics**

In a circuit L,C & R are connected in parallel . At any instant current through inductor is 0.8 A,current through capacitor is 0.4 A & current through resistor is 0.3A.what is the current delivered by ac source?

**physics**

A horizontal disc rotating freely about a vertical axis makes 90 revolutions per minute. A small piece of wax of mass “m” falls vertically on the disk & sticks to it at a distance “r” from the axis. If the number of revolutions reduces to 60, then find the ...

**physics**

A horizontal disc rotating freely about a vertical axis makes 90 revolutions per minute reduces to 60,then find the moment of inertia of the disc? 1. mr2 2. 3/2mr2 3. 2mr2 4. 3mr2 (the last ‘2’in each option should be considered as square, please)

**chemistry**

the specific heat of a gas is found to be 0.075 calories at constant volume & its formula weight is 40. the atimicity or the valency of the gas is ............

**chemistry**

the specific heat of a gas is found to be 0.075 calories at constant volume & its formula weight is 40. the atimicity of the gas is ............

**chemistry**

the combustion of solid benzoic acid is taking place. give the equation of this process & the value of delta Ng.

**chemistry**

The specific heat of a gas is found to be 0.075 calories at constant volume and its formula Wt . is 40. the atomicity of the gas is……………. .

**chemistry**

a vessel has 6 g oxygen at a pressure P & temp 400 K . a small hole is made in it so that oxygen leaks out . how much oxygen leaks out if the pressure is P/2 & temperature 300 K ? 1. 5g 2. 4g 3. 2g 4. 3g

**chemistry**

a vessel has 6 g oxygen at a pressure P & temp 400 K . a small hole is made in it so that oxygen leaks out . how much oxygen leaks out if the pressure is P/2 & temperature 300 K ? 1. 5g 2. 4g 3. 2g 4. 3g

**english**

list of rhyming words for std 2

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