# Posts by hriday

Total # Posts: 17

**maths**

Find the ratio of the price of pencil to that of price of ball pen If the cost of pencil is Rs 96 per score and ball pen cost rs 50.40?

**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 ...

**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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