1.         Give very short answers to any ten questions: 1x10=10

1.1       In which part of an atom is a proton located?

1.2       What is the boiling point of water in absolute scale under standard atmospheric pressure?

1.3       How many groups are there in long form of periodic table?

1.4       Write the SI unit of thermal capacity?

1.5       Watt-hour is the SI unit of which physical quantity?

1.6       In what combination is the fuse wire connected to mains?

1.7       Write the chemical formula of ‘Oleum’

1.8       Write the name of a pollutant emitted from the goldsmith’s shop.  

1.9       Which energy is transformed into which energy in the case of Barlow’s wheel?  

1.10     What should be the resistance of an ideal voltmeter?

1.11     Write the CGS unit of resistivity.  

1.12     Two wires are of same length but different area of cross section. Which wire has the greater value of resistance?

1.13     Write the general formula of alkene.


Group ‘B’

2.1       Write electronic configuration of the 19K39. Write electronic configuration of the  K+ 2+2

2.2       Write one similarity and one dissimilarity between Solar System and Atomic structure.  2

2.3       define Isotopes. Give examples.   2


3.1       What is absolute zero temperature? Write its value in Celsius scale. 2

3.2       Write Charle’s law related to gas.  2

3.3       Write Avogadro’s hypothesis. If V liter of H2 has 6.023x1023 number of molecules at STP, then find the number of molecules in 2V liter of CO2 .  2+2

4.1       Define Molar Volume. 2

4.2       At constant temperature the volume of a certain mass of gas is compressed to half of its initial volume by applying pressure. Find the change in pressure.  2

4.3       Define Absolute scale of temperature.  Write the effect of temperature on the movement of molecules of a gas.   2+2

5.1       If 10 gm of Calcium carbonate reacts with excess dil. HCl, then how many grams of CO2 will be produced? (Ca=40, C=12, O=16) 2

5.2       Why Ions are more stable than an atom? 2

5.3       Define molecular mass in C-12 scale?

5.4       Write two concepts of Dalton’s atomic theory.    2