Question 3 :
State true or false.<br/>In a chemical equation, the products are written on the left-hand side and the reactants on the right-hand side with an arrow in between.

Question 4 :
<p>Oils on treating with hydrogen in the presence of palladium or nickel&#160;catalyst&#160;form fats.&#160;This is an example of :</p>

Question 6 :
Other signs of a chemical reaction might be an increase in temperature if heat is released or a change in _____.

Question 7 :
Balanced chemical equations imply which of the following?<br>$I$. Numbers of molecules are conserved in chemical change<br>$II$. Numbers of atoms are conserved in chemical change.<br>$III$. Mass is conserved in chemical change.

Question 8 :
In $HS^, I^, R-NH_2, NH_3$ order of proton&#160;excepting tendency will be:

Question 9 :
A less reactive metal replaces a more reactive metal from its salt solution in water.<br>

Question 10 :
The conversion of ${Cr}_{2}{O}_{7}^{2-}$ to ${Cr}^{3+}$ during a chemical reaction is an example of:

Question 11 :
The phenomenon of formation of simple sugar from starch in our body is the example of which reaction?&#160;

Question 12 :
Chlorine gas is passed in an aqueous potassium iodide&#160;solution to form potassium chloride solution and solid iodine. Identify the type of the reaction:<br/>

Question 13 :
$CaC{ O }_{ 3 }\xrightarrow { \quad \quad \Delta \quad \quad &#160;} CaO+C{ O }_{ 2 }\uparrow $ is a ________ reaction.

Question 15 :
When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper sulphide is obtained and the sulphuric acid so formed remains in the solution. The reaction is an example of:<br/>

Question 16 :
In an oxidation process for a cell,<br>$M_1 \rightarrow{ M }_{ 1 }^{ n+ } + ne^- $<br>the other metal $(M_2)$ being univalent showing reduction takes up _____ electrons to complete redox reaction.

Question 18 :
On heating blue coloured powder of copper(II) nitrate in a boiling&#160;tube copper oxide (black), oxygen gas and a brown gas X is formed.&#160;Which type of reaction is this?<br/>

Question 19 :
Breaking of lead bromide into lead and bromine is an example of _____.

Question 21 :
How many grams of ammonium nitrate will be formed in the reaction?

Question 22 :
We know that balancing of a chemical equation is entirely based on the law of conservation of mass. However the concept of Principle of Atom Conservation (POAC) can also be related to law of conservation of a mass in a chemical reaction. So, POAC can also acts as a technique for balancing a chemical equation. For example, for a reaction&#160;$ABC_3 \rightarrow AB +C_2$&#160;On applying POAC for A, B and C and relating the 3 equation we get : $\dfrac {n_{ABC_3}}{2}=\dfrac {n_{AB}}{2}=\dfrac {n_{C_2}}{3}$ (N= number of moles of X)&#160;Thus the coefficients of $ABC_3$, AB and $C_2$ in the balanced chemical equation will be 2,2 &amp; 3 respectively and the balanced chemical equation can be represented as :$2ABC_3 \rightarrow 2AB +3C_2$Now answer the following question.<br/>&#160;<br/>If the weight ratio of C and $O_2$ present is 1:2 and both of the reactants completely cousumes and form CO and $CO_2$ and we will obtain a gaseous mixture of&#160;CO and $CO_2$&#160;. What would be the weight ratio of CO and $CO_2$&#160; in mixture?

Question 26 :
An amount of 0.01 mole of $ SO_{2}Cl_{2} $ is hydrolysed completely in sufficientwater (no gas is allowed to escape out ) and the solution is diluted to 200 ml. Which of the following statement is/are correct? (Ag = 108 )

Question 27 :
What is not a mole ratio of $ \displaystyle 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$? <br/>