Question 1 :
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 :
Other signs of a chemical reaction might be an increase in temperature if heat is released or a change in _____.
Question 5 :
State true or false.<br/><br/>In redox reactions, oxidation and reduction take place simultaneously.<br/>
Question 6 :
Which type of chemical decomposition reaction is the following reaction?<br>$Cu(OH)_2\xrightarrow {heat} CuO+H_2O$
Question 7 :
Which of the following is an example of the exothermic reaction ?
Question 9 :
A less reactive metal replaces a more reactive metal from its salt solution in water.<br>
Question 11 :
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 14 :
The substance that initially involved in a chemical reaction is called a reactant.
Question 16 :
When chlorine reacts with sodium bromide the solution turns brown because ________.
Question 19 :
In $HS^, I^, R-NH_2, NH_3$ order of proton excepting tendency will be:
Question 20 :
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 21 :
What is the difference between displacement over double displacement reactions ?
Question 23 :
An oxidizing agent is always takes part in the reduction process while a reducing agent is always take part in the _______ process.
Question 24 :
Reaction of iron nails with copper sulphate solution is an example of ____________.
Question 25 :
Name the type of the following chemical reaction.$2KClO_3 \rightarrow 2KCl +3O_2$
Question 28 :
$KXO_3$(s) well mixed with water, temperature of solution falls. This reaction is:<br/>
Question 30 :
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 32 :
Three cations $A, B, C$ are allowed to react with ammonium hydroxide solution. $A$ and $B$ produce a dirty green precipitate and a reddish brown precipitate respectively, both of which do not dissolve on further addition of ${NH}_{4}OH$. $C$ gives pale blue colour precipitate with less amount of ammonium hydroxide and on further addition of ${NH}_{4}OH$, precipitate becomes soluble and deep blue colour solution is formed:
Question 35 :
A chemical reaction in which heat is evolved is called a/an:<br/>
Question 36 :
Which of the following symbol is used to show solid precipitate?
Question 38 :
In the reaction, $4Fe+3O_2\rightleftharpoons 4Fe^{3+}+6O^{2-}$ Which of the following statements is incorrect?
Question 39 :
The conversion of ${Cr}_{2}{O}_{7}^{2-}$ to ${Cr}^{3+}$ during a chemical reaction is an example of:
Question 41 : <p>Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of :</p>
Question 42 :
AB + CD $\rightarrow$ AD + BC<br/><br/>The reaction is an example of _________.<br/><br/><br/>
Question 43 :
Which of the following reaction requires oxygen to be a reactant ?
Question 45 :
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 46 :
$FeCl_3 + 3NaOH \rightarrow 3NaCl + Fe(OH)_3$<br/><br/>The reaction is an example of________.
Question 47 :
Which part of tooth, made up of calcium phosphate, is the hardest substance in the body?
Question 49 :
Four solutions A, B, C and D when tested with universal indicator showed pH as $4, 11, 7$ and $9$ respectively. Which one of the four solutions is neutral?<br/>
Question 50 :
Aquaregia is prepared by mixing conc. $HCl$ and $conc. HNO_3$ in the ratio ________ 
Question 52 :
The solution of bleaching powder in water is always a clear solution.<br/>
Question 53 :
Assertion: pH of a neutral solution is always $7$.
Reason: pH of a solution does not depend upon temperature.
Question 55 :
If tartaric acid is not added in baking powder, the cake will taste bitter due to te presence of -
Question 56 :
Effervescence is seen when a bottle of soda water is opened.
Question 57 :
When $NH_{3}(0.1\ M) 50\ ml$ mix with $HCl (0.1\ M)\ 10\ ml$ then what is $pH$ of resultant solution $(Pk_{b} = 4.75)$.
Question 59 :
The chloride salt of a certain weak monoacidic organic base is hydrolysed to an extent of $3$% in its $0.1M$ solution at ${25}^{o}C$. Given that the ionic product of water is ${10}^{-14}$ at this temperature, what is the dissociation constant of the base?
Question 63 :
$1.0 \ L$ 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 65 :
The acid present in the body of red ant is ________.<br/>
Question 68 :
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 70 :
Calculate the pH of a solution which is 0.1 M in HA and 0.5M in NaA. Ka for HA is $1.8\times { 10 }^{ -6 }$?
Question 71 :
Water of crystallization is the fixed number of water molecules chemically attached to a unit of a salt in its crystalline form.<br/>
Question 75 :
$pK_{a}$ of acetic acid is <b>4.741</b>. The concentration of $CH_{3}COONa$ is <b>0.01</b> M. The pH of $CH_{3}COONa$ is?
Question 77 :
Which of the following methods is adopted for preparing dilute solution of ${ H }_{ 2 }S{ O }_{ 4 }$?
Question 78 :
In which of the following reactions does conc.${ H }_{ 2 }S{ O }_{ 4 }$ act as an oxidising agent?
Question 80 :
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 82 :
If $H^{+}$ion concentration of a solution is increasedby $10$ times, its $pH$ will :<br>
Question 83 :
Which colour appears when few drops of phenolphthalein put into test tube contains lime water?
Question 85 :
The hydrogen ion concentration of the oceans is about $2\times10^{-9}\space M$. What is the $pH$?
Question 86 :
$p{ K }_{ a }$ values of four acids are given below at ${ 25 }^{ o }C$. The strongest acid is:
Question 89 :
Assertion: Ionic compounds are bad conductors of electricity.
Reason: In ionic compounds mobile ions exists.
Question 90 :
$Li$, $K$, $Ca$, $Na$, $Mg$, $Al$, $Zn$, $Fe$, $Pb$, $Cu$, $Hg$, $Ag$<br/>Which metal will displace hydrogen from acids but not water?
Question 91 :
State whether true or false :<br/><br/>All the elements having one electron in their outermost shell are metals.
Question 94 :
When an element of very low ionization potential reacts with an element of very high electron affinity, then :
Question 96 : 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 100 :
When manganese dioxide is heated with aluminium powder, the products obtained are _________ .<br/>
Question 103 :
Which of the following is a correct property for solid magnesium carbonate?
Question 104 :
Electrolysis is used in the extraction of metals from their ores.
Question 108 :
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 110 :
During electrolytic refining of copper.<br/>(a) Pure copper acts as anode.<br/>(b) Pure copper acts as cathode.<br/>(c) Impure copper acts as anode.<br/>(d) Impure copper acts as cathode.<br/>
Question 112 :
Which one of them is more ionic $LiCl$ or $NaCl$ ?
Question 114 :
Which of the following metals exist in their native state in nature?<br/>(i) Ca<br/>(ii) Au<br/>(iii) Zn<br/>(iv) Ag<br/>
Question 115 :
On the basis of following features identify the correct option:<br/>I. This metal is not obtained in free state.<br/>II. This metal is obtained by electrolysis of their chlorides in molten state.
Question 119 :
The structure of glycine (amino acid) is $H_{2}N-CH_{2}COO^{-}$ ($z$ witter ion). Select the correct statement:-
Question 120 :
Process of depositing a thin layer of zinc metal on iron objects is called:
Question 122 :
The attraction between molecules and salt, when a salt is dissolved in water molecules, is :
Question 124 :
During the formation of sodium chloride, sodium transfers one electron to chlorine to attain the configuration of which noble gas?
Question 125 :
Coulomb's law is used to calculate the energy of an ion pair.
Question 126 :
Which among the following metals is employed to provide cathodic protection to iron?
Question 127 :
Separation of impurities from the extracted metals is known as __________.
Question 130 :
The complete loss of an electron of one atom to another atom with the consequent formation of electrostatic charges is said to be
Question 133 :
The process to heat the ore in the presence of excess supply of air below its melting point is called as ________.<br/>
Question 134 :
In electrolytic refining, which one is the anode and which is cathode?
Question 137 :
Assertion: Zinc is used in the galvanization of iron.
Reason: Its coating on iron articles increases their life by protecting them from rusting.
Question 138 :
A magnesium ion has a net positive charge while the magnesium atom has __________. 
