Question 2 :
Aqueous solutions of magnesium chloride and silver nitrate are mixed to form solid silver chloride and aqueous magnesium nitrate.<br/><br/>The balanced molecular equation contains which one of the following terms?
Question 3 :
Identify the type of reaction which will occur based on the information provided about the reactants:<br>${CH}_{4}(g)+{O}_{2}(g)\rightarrow$
Question 4 :
The conversion of ${Cr}_{2}{O}_{7}^{2-}$ to ${Cr}^{3+}$ during a chemical reaction is an example of:
Question 6 :
Reaction of iron nails with copper sulphate solution is an example of ____________.
Question 9 :
AB + CD $\rightarrow$ AD + BC<br/><br/>The reaction is an example of _________.<br/><br/><br/>
Question 11 :
State true or false.<br/><br/>In redox reactions, oxidation and reduction take place simultaneously.<br/>
Question 12 :
The reaction of hydrochloric acid with zinc oxide to form zinc chloride and water is neutralization reaction. State whether the statement is true or false
Question 13 :
Which of the following reaction requires oxygen to be a reactant ?
Question 14 :
A chemical reaction in which heat is evolved is called a/an:<br/>
Question 15 :
$FeCl_3 + 3NaOH \rightarrow 3NaCl + Fe(OH)_3$<br/><br/>The reaction is an example of________.
Question 16 :
In $HS^, I^, R-NH_2, NH_3$ order of proton excepting tendency will be:
Question 18 :
An oxidizing agent is always takes part in the reduction process while a reducing agent is always take part in the _______ process.
Question 19 :
The substance that initially involved in a chemical reaction is called a reactant.
Question 21 :
The digestion of food in the body is an example of __________ reaction.
Question 22 :
On heating blue coloured powder of copper(II) nitrate in a boiling tube copper oxide (black), oxygen gas and a brown gas X is formed. Which type of reaction is this?<br/>
Question 23 :
The reaction between carbon and oxygen can be represented as $C_{(s)}+O_{2(g)}\rightarrow CO_{2(g)}+heat$.<br/><br/>In which of the following type(s), the above reaction can be classified?<br/>I. Combustion reaction<br/>II. Displacement reaction<br/>III. Endothermic reaction<br/>IV. Combination reaction.<br/>
Question 24 :
What type of a chemical reaction is used to extract several metals from their naturally-occuring compounds like oxides or chlorides?
Question 25 :
Reaction of iron nails with copper sulphate solution is an example of:<br>
Question 27 :
Breaking of lead bromide into lead and bromine is an example of _____.
Question 28 :
What happens when a piece of zinc metal is added to copper sulphate solution ?<br/>
Question 29 :
Formation of nitric oxide from nitrogen and oxygen is a ______ reaction.
Question 30 :
The phenomenon of formation of simple sugar from starch in our body is the example of which reaction? 
Question 31 :
Effervescence is seen when a bottle of soda water is opened.
Question 34 :
Water of crystallization is the fixed number of water molecules chemically attached to a unit of a salt in its crystalline form.<br/>
Question 35 :
$p{ K }_{ a }$ values of four acids are given below at ${ 25 }^{ o }C$. The strongest acid is:
Question 37 :
Statement I: A basic solution has more hydrogen ions than an acidic solution.<br/>Statement II: pH is defined as the -log $[H^+]$.<br/>
Question 40 :
Which part of tooth, made up of calcium phosphate, is the hardest substance in the body?
Question 41 :
Which of the following methods is adopted for preparing dilute solution of ${ H }_{ 2 }S{ O }_{ 4 }$?
Question 43 :
If $H^{+}$ion concentration of a solution is increasedby $10$ times, its $pH$ will :<br>
Question 45 :
$1.0 \ L$ solution is prepared by mixing $61 \ gm$ benzonic acid $(pK_a = 4.2)$ with $72 \ gm$ of sodium benzoate and then $\text{300 mL 1.0 M HBr}$ solution was added. the $pH$ of final solution is:-
Question 48 :
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?
Question 50 :
Aquaregia is prepared by mixing conc. $HCl$ and $conc. HNO_3$ in the ratio ________ 
Question 51 :
Salt $A$ commonly used in bakery products, on heating, gets converted into another salt $B$ which itself is used for removal of hardness of water and a gas $C$ is evolved. The gas $C$ when passed through lime water turns it milky. Identify $A,\ B$ and $C$.<br/>
Question 54 :
For making cake, baking powder is taken. If at home your mother uses baking soda instead of baking powder in cake, what is the role of tartaric acid added to baking soda?
Question 55 :
Determine the $pH$ of a $0.2M$ solution of pyridine ${C}_{5}{H}_{5}N$. [For pyridine : ${K}_{b}=1.5\times {10}^{-9}$]
Question 58 :
What is the $pH$ of a solution obtained by mixing $10$mL of $0.1$M $HCl$ and $40$ mL of $0.2$M $H_2SO_4$?
Question 59 :
<b></b>Bleaching powder has several uses, some of which are mentioned here. Pick the false one.
Question 60 :
If the pH of a neutral water is 6.5 then the temperature of water:
Question 61 : Which one of the methods given in column- I is applied for the extraction of the metal given in column II:<br/><blockquote><table class="wysiwyg-table"> <tbody><tr> <td><b>Column -I</b></td> <td><b>Column - II</b></td> </tr> <tr> <td>(A) Electrolytic reduction</td> <td>(i) Aluminium</td> </tr> <tr> <td>(B) Reduction with carbon</td> <td>(ii) Zinc</td> </tr> <tr> <td>(C) Reduction with aluminium</td> <td>(iii) Sodium</td> </tr> <tr> <td> </td> <td>(iv) Iron</td> </tr> <tr> <td> </td> <td>(v) Manganese</td> </tr> <tr> <td> </td> <td>(vi) Chromium</td> </tr></tbody></table></blockquote>
Question 62 :
The structure of glycine (amino acid) is $H_{2}N-CH_{2}COO^{-}$ ($z$ witter ion). Select the correct statement:-
Question 63 :
Read the following statements and answer as true or false.<br/>Metals occur in nature only as free elements.<br/>
Question 67 :
Coulomb's law is used to calculate the energy of an ion pair.
Question 68 :
$Li$, $K$, $Ca$, $Na$, $Mg$, $Al$, $Zn$, $Fe$, $Pb$, $Cu$, $Hg$, $Ag$<br/>Which metal will displace hydrogen from acids but not water?
Question 69 :
Assertion: Zinc is used in the galvanization of iron.
Reason: Its coating on iron articles increases their life by protecting them from rusting.
Question 71 :
The bonds present in $\left( { N }_{ 2 }{ O }_{ 5 } \right) $ are:<br/>
Question 72 :
We have $CuSO_4$ solutions (blue) in two beakers A and B. In beaker A we add Ag pieces and in B we add Zn pieces. What will happen in A if :<br/>1. $Cu^{2+}$ is reduced to Cu<br/>2. no reaction.
Question 74 :
Galvanisation is a method of protecting iron from rusting, by coating with a thin layer of:<br/>
Question 75 :
During extraction of metals, electrolytic refining is used to obtain pure metals. Material which will be used as anode, for refining of silver metal by this process, is:<br/>
Question 79 :
Which among the following metals is employed to provide cathodic protection to iron?
Question 80 :
A solid compound "A" consists of simple ions.<br/>Nature of the bond present in A will be:
Question 86 :
Which of the following are not the characteristic property of non-metal?<br/>
Question 87 :
Which of the following pairs of elements form oxides of polyanions and polycations respectively:
Question 88 :
Among $CaH_{2}, BeH_{2}, BaH_{2}$, the order of ionic character is _______.
Question 89 :
Complete the statements given below pertaining to metallurgy by filling the blank with the correct word. "M" is a metal. <br/><br/>M is ______  electropositive than hydrogen and can replace the _______ ion in hydrochloric acid to form a salt.<br/>
Question 91 :
Which of the following compounds can be reduced to copper when heated with coke?<br/>
Question 92 :
An alkali metal $A$ gives a compound $B$ (molecular mass $=40$) on reacting with water. The compound $B$ gives a soluble compound $C$ on treatment with aluminium oxide. Metal $A$ is:<br/>
Question 96 :
Assertion: In the formation of water molecule, both hydrogen and oxygen atoms attain octet of electrons.
Reason: Oxygen atom forms two ionic or electrovalent bonds with two hydrogen atoms.
Question 97 :
Zinc sulphate forms a colourless solution in water. Colour on adding copper  is :<br/>
Question 99 : Match the following.<table class="wysiwyg-table"><tbody><tr><td>Separation process<br></td><td>Purpose for which we do the separation<br></td><td>What do we do with the separated components<br></td></tr><tr><td>1) Separate stones from rice<br></td><td>a) To remove non useful components <br></td><td>i) We throw away the impurities<br></td></tr><tr><td>2) Churning milk to obtain butter<br></td><td>b) To remove impurities or harmful components<br></td><td>ii) we throw away the solid component<br></td></tr><tr><td>3) Separate tea leaves<br></td><td>c) to separate two different but useful components.<br></td><td>iii) we use both the components.<br></td></tr></tbody></table><br>
Question 100 :
Assertion: Sodium displaces magnesium from magnesium chloride solution.
Reason: Magnesium displaces zinc from zinc chloride solution.
