Question 2 :
<div>Choose the most appropriate answer:&#160;&#160;&#160;&#160; </div><div>Rising and setting of the sun at a given place is a <br/></div>

Question 6 :
<div>Write 'true' or 'false' against the following statement.&#160;&#160;&#160;&#160;&#160;&#160;&#160; <br/></div><div>In a physical change no net energy change is involved.<br/></div><div></div><br/>

Question 7 :
The fifth state of matter i.e. Bose-Einstein condensate was proved in:

Question 8 :
<div>Write 'true' or 'false' against the following statement.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <br/></div><div>In a chemical change, rearrangement of molecules and atoms involves some energy changes.<br/></div><div></div><br/>

Question 9 :
<div>Write 'true' or 'false' against the following statement.&#160;&#160;&#160;&#160;&#160;&#160; <br/></div><div>Cutting of paper into pieces is a chemical change.</div><div></div>

Question 14 :
<div>Write 'true' or 'false' against the following statement.&#160;&#160;&#160; </div><div>Rusting of iron is a chemical change.<br/></div><br/>

Question 15 :
Solids which are formed by slow cooling will tend to be ________,&#160;while solids which are frozen rapidly are more likely to be _________ .

Question 16 :
As a submarine descends into the deep ocean, the pressure it must withstand increase. At an altitude of $- 700$ meters, the pressure is $50$ atm (atmosphere), and at altitude of $- 900$ meters, the pressure is $70$ atm. For every $10$ meters the submarine descends, the pressure it faces increase by $n$, where $n$ is a constant. What is the value of $n$?

Question 17 :
Pressure of a gas mixture of air is measured by ____________.

Question 18 :
_________ is used to measure the pressure of liquids and gases.

Question 20 :
Which of the following gases is LEAST dense when all are measured under the same conditions?

Question 23 :
<div>Write 'true' or 'false' against the following statement.&#160;&#160;&#160;&#160;&#160;&#160;&#160; <br/></div><div>New substances are formed in a chemical change.<br/></div><div></div><br/>

Question 24 :
A liquid is in equilibrium with its vapour at its boiling point. On the average, the molecules in the two phases have equal:

Question 26 :
The weakest interparticle forces are found in which of the following?

Question 28 :
<div>Write 'true' or 'false' against the following statement.&#160; &#160;&#160;</div><div>Earthquake is a desirable change.<br/></div>

Question 31 :
Pressure remaining constant, the volume of a fixed mass of a gas is directly proportional to its absolute temperature. This law is popularly known as :

Question 32 :
<div>Write 'true' or 'false' against the following statement.&#160;&#160;&#160;&#160;&#160;&#160; <br/></div><div>During a physical change energy is neither given out or absorbed by the system.<br/></div><div></div><br/>