Question 2 :
The carbon atoms in diamond are bonded to each other by:

Question 3 :
Which of the following compounds would be a white, crystalline solid?

Question 6 :
A non-metal $X$ exists in two different forms $Y$ and $Z$. $Y$ is the hardest natural substance whereas $Z$ is a good conductor of electricity. $Y$ is :<br/>

Question 7 :
Which of the following is not an allotropic form of carbon?

Question 9 :
Fullerene, an allotrope of carbon, has 60 carbon atoms joined together and no other element in it. There are various types of fullerenes. $C_{60}, C_{70}, C_{74}$ and $C_{78}$ are the members of the fullerene family. Identify the property due to which such large numbers of carbon atoms are joined together in this molecule<span> :</span>

Question 13 :
Which of the following is the chemically inactive, allotropic form of carbon?

Question 17 :
A crystalline solid is made of two atoms X and Y. Atoms of 'X' are present at the corner while atoms of 'Y' are present at face centres. If one atom of 'X' is missing from the corner, then the simplest formula of the solid is:

Question 19 :
<div><div><span>Statement: Crystalline solids are isotropic.</span><br/></div></div><div><span><br/></span></div><div><span>State whether the given statement is true or false.<br/></span></div>

Question 21 :
Two adjacent layers in graphite are bonded by comparatively _______ forces.<br/>

Question 29 :
A true solution is a homogeneous mixture of solute and solvent. Chalk powder in water is a heterogeneous mixture. Hence chalk powder is not a true solution.

Question 31 :
The substance in which solute is dissolved is known as :

Question 33 :
Assertion: The solubility of a solid in a liquid increases with increase of pressure. Reason: Solubility of gas in a liquid is directly proportional to the pressure of the gas.

Question 35 :
<span>Mixture perfectly uniform in its composition and properties throughout its bulk is called :</span>

Question 39 :
Just because you mix two things together does not necessarily mean that they will form a homogeneous mixture (a solution).<br>For example, if you add sodium chloride, $NaCl$, to a container that has both hexane and water, the $NaCl$ will dissolve into the water, but will not be found in the hexane $C_{6}H_{14}$.<br>Which of the following statements BEST explains these observations?

Question 40 :
Hydrogen gas adsorbed on surface of platinum is an example of solid in gas solution.

Question 41 :
<div><span>Take small amounts of salt and add it to large amounts of water. $X$ is formed. The substance present in small amount is called $Y$ whereas the substance present in large amounts is called $Z$ and the salt solution formed is called $A$. The solution in which more of the solute can be dissolved at a given temperature is called $B$ solution. The solution which cannot be dissolved any more of the solute at a given temperature is $C$ solution.</span><br/></div><div><br/></div>What is $Y$?<br/>

Question 44 :
Sensitivity of molar mass determination decreases with increase in molar mass of solute by ebullioscopy method.<br/>