ICSE − Q & A

In ICSE 2015 Geography paper, we are asked to find out the time taken to cycle along the N-S distance on the map..
The calcuated ans is about 1 hour 35 min but the answers provided in the self-study's etc is 1 hour. How's it possible?
And if all something like that is asked this year also, what to do?
Please help....

Can anyone suggest me the important chapters for Hindi from Ekanki Suman, Gadya Sankalan and Chandragupta Vikramaditya?

10. The velocity of light in a transparent liquid is 1.8X10cm/second, while in vacuum it is 3X10^3cm/second. Find how much the bottom of the vessel containing this liquid appears to be raised if the depth of the liquid is 25cm.

9. 2 kg of water is contained in a 2.5 KW  electric kittle. Assuring that the heat capacity of the kettle is negligible. Calculate (i) the time taken for the temp of water to rise from 25 degree centigrade to it boiling point 100 degree centigrade. (ii) the mass of the water evaporated per second from the boiling water. S.L.H of ice = 336X10^3J/kg.

8. What would be the final temperature of the mixture when .5 g of ice at -10 degree are mixed with 250g of water at 30 degree centigrade? S.H.C of ice 0.5cal/g degree centigrade and S.L.H of ice = 80cal/g.

7. 50g of steam at 100 degree centigrade is passed into a mixture of 100g of ice and 200gm of water at 0 degree centigrade. Find the rise in temperature. (S.L. H. Of steam = 540 cal/g and Lf of ice = 80cal/g)

6. How much steam at 100 degree centigrade will just melt 3200g of rice at -10 degree centigrade ? ( S.H.C of rice = 0.5 cal/g digree centigrade; Let heat of vapour of steam =540cal/gg).

5. An aluminium cessel of mass 200g, contains 0.5 litre of water.  What is the heat required to raise the temperature of the system from 25 Degree centigrade to 75 Degree  centigrade? (S.H.C of Aluminium 0.84X10^3J/kg dehree centigrade and S.H.C of water 4.2X10^3J/kg dehree centigrade. A dencity water = 10^3/m^3)

A bulb is joined to a battery of e.m.f 6V. A steady current of 0.5 A flows through circuit. Calculate the total energy provided by the battery in 5 minutes.

3. A house wife uses “a fire tong pair” of length 20cm to lift a piece of burning coal of mass 200gm. If she applies force at a distance of 5cm from the fulcrum, what is her effort? If the efficiency of the fire tong is 100% . find it M.A and V. R.

2. If the wavelength of Deepika’s voice is 2 and that of Ashwaria is 5m respectively in air. Find the frequency of Ashwaria’s voice. Fi the frequency of Deepika’s voice is 750Hz. Which of them has a higher pitch?

1. A man throws a body of mass 500gm with a velocity of 10m/s vertically upward on a planet he weight of the body on the planet.

Can someone give the kavi parichay of Ram Naresh Tripathi?

Is there any sort of chapter wise weightage in physics for the board?