Question 2 :
In the reaction, $4Fe+3O_2\rightleftharpoons 4Fe^{3+}+6O^{2-}$ Which of the following statements is incorrect?
Question 3 :
Which of the following symbol is used to show solid precipitate?
Question 4 :
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 5 :
In $HS^, I^, R-NH_2, NH_3$ order of proton excepting tendency will be:
Question 7 :
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 8 :
The substance that initially involved in a chemical reaction is called a reactant.
Question 11 :
Which of the following is an example of the exothermic reaction ?
Question 16 :
The conversion of ${Cr}_{2}{O}_{7}^{2-}$ to ${Cr}^{3+}$ during a chemical reaction is an example of:
Question 17 :
$KXO_3$(s) well mixed with water, temperature of solution falls. This reaction is:<br/>
Question 22 :
An oxidizing agent is always takes part in the reduction process while a reducing agent is always take part in the _______ process.
Question 23 :
A chemical reaction in which heat is evolved is called a/an:<br/>
Question 24 :
Other signs of a chemical reaction might be an increase in temperature if heat is released or a change in _____.
Question 25 :
$FeCl_3 + 3NaOH \rightarrow 3NaCl + Fe(OH)_3$<br/><br/>The reaction is an example of________.
Question 27 :
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 28 :
When chlorine reacts with sodium bromide the solution turns brown because ________.
Question 29 :
Reaction of iron nails with copper sulphate solution is an example of ____________.
Question 30 :
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 33 :
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 34 :
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 :
Name the type of the following chemical reaction.$2KClO_3 \rightarrow 2KCl +3O_2$
Question 37 :
What is the difference between displacement over double displacement reactions ?
Question 38 :
Which of the following reaction requires oxygen to be a reactant ?
Question 39 : <p>Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of :</p>
Question 40 :
State true or false.<br/><br/>In redox reactions, oxidation and reduction take place simultaneously.<br/>
Question 42 :
Which type of chemical decomposition reaction is the following reaction?<br>$Cu(OH)_2\xrightarrow {heat} CuO+H_2O$
Question 44 :
A less reactive metal replaces a more reactive metal from its salt solution in water.<br>
Question 45 :
AB + CD $\rightarrow$ AD + BC<br/><br/>The reaction is an example of _________.<br/><br/><br/>
Question 47 :
When oxygen gas is either absent or present in low quantity in the solid, in places like stagnant swamps, the soil is said to be in:
Question 48 :
$H_{2}S$ is passed through an acidified solution of copper sulphate and a black precipitate is formed. This is due to:
Question 50 :
Select the correct alternative.<br/>The reaction between acid and base to form salt and water is an example of :
Question 52 :
Identify the reducing agent in the redox reaction<br/><br/>$5SO^{2-}_3+ 2MnO^{-}_4 +6H^{+} \rightarrow 5SO^{2-}_4 +2Mn^{2+} +3H_2O$
Question 53 :
If you pour a few drops of petrol on your palm, it will feel cool as the petrol evaporates. This change a/an:
Question 54 :
Calcium oxide reacts vigorously with water to produce slaked lime.<br/>$CaO(s) + H_2O(l) \to Ca(OH)_2(aq)$<br/>This reaction can be classified as:<br/>(A) Combination reaction<br/>(B) Exothermic reaction<br/>(C) Endothermic reaction<br/>(D) Oxidation reaction<br/>Which of the following is the correct option?<br/>
Question 55 :
When lead nitrate is heated, it breaks down into lead monoxide, nitrogen dioxide and oxygen as given below:$2Pb(NO_3)_2\rightarrow 2PbO+4NO_2+O_2$<br/>The above reaction is an example of :
Question 59 :
Exposure of silver bromide to sunlight for a long duration turns grey due to:
Question 62 :
Magnesium reacts with acids producing hydrogen and corresponding magnesium salts. In such reactions Mg undergoes.
Question 64 :
Select the correct alternative.Which of the following is a decomposition reaction?
Question 65 :
Which of the statements about the reaction below are incorrect?<br/>$2PbO\left( s \right) +C\left( s \right) \rightarrow 2Pb\left( s \right) +C{ O }_{ 2 }\left( g \right) $<br/>(a) Lead is getting reduced.<br/>(b) Carbon dioxide is getting oxidised.<br/>(c) Carbon is getting oxidised.<br/>(d) Lead oxide is getting reduced.
Question 67 :
The chemical equation $Ba{ Cl }_{ 2 }+{ Na }_{ 2 }S{ O }_{ 4 }\rightarrow BaS{ O }_{ 4 }+2NaCl$ represents following type of chemical reaction.
Question 68 :
Which of the following statement is incorrect about the given reaction?<br/>$3Fe+4H_2O\rightarrow Fe_3O_4+4H_2$
Question 69 :
Identify the product(s) which will be formed by using the information provided about the reactants :<br/>${C}_{4}{H}_{10}(g)+{O}_{2}(g) \rightarrow$
Question 72 :
Which of the following equations is not an example ofsingle displacementreaction ?
Question 73 :
Four hypothetical metallic elements A, B, C and D form soluble nitrates having formulae $ANO_3,\ B(NO_3)_2,\ CNO_3,\ D(NO_3)_3$.<br/>Strips of each of the four metals were immersed in 0.1 M aqueous solution of the other metal nitrates, and the following observations recorded.<br/>1. Metal B underwent reaction in all solutions.<br/>2. Metal A only reacted with $CNO_3$.<br/>Metal D would react with:
Question 74 :
When magnesium burns in air, compound of magnesium formed are magnesium oxide and :
Question 75 :
What would you observe when a mixture of iron filings and sulphur powder is heated strongly?<br/>
Question 76 :
Assertion: Silver metal does not show any change when it is placed in HCl solution.
Reason: Silver metal does not react with dilute HCl.
Question 78 :
$CaC{ O }_{ 3 }\xrightarrow { \quad \quad \Delta \quad \quad  } CaO+C{ O }_{ 2 }\uparrow $ is a ________ reaction.
Question 79 :
Four hypothetical metallic elements $A, B, C$ and $D$ forms soluble nitrates having formulae $ANO_3, B(NO_3)_2, CNO_3$ and $D(NO_3)_3$.<br/>Strips of each of the four metals were immersed in $0.1\ M$ aqueous solution of the other metal nitrates, and the following observations recorded.<br/>1. Metal $B$ underwent reaction in all solutions.<br/>2. Metal $A$ only reacted with $CNO_3$.<br/>In order of increasing strength as reducing agents, the metals are :
Question 80 :
The decomposition of mercuric oxide ($Hg)$) on heating, resulting in the formation of mercury and oxygen, is represented by the following chemical equation-<br/>$2HgO+180kJ\longrightarrow 2Hg+{O}_{2}$<br/>Which one of the following represents the heat of formation of mercuric oxide?
Question 82 :
Which of the following reaction are disproportion reaction?<br/>a) $2Cu^+\rightarrow Cu^{2+}+Cu^o$<br/>b) $3MnO^{2-}_4+4H^+\rightarrow 2MnO_4^-+MnO_2+2H_2O$<br/>c) $2KMnO_4\xrightarrow []{\Delta}K_2MnO_4+MnO_2+O_2$<br/>d) $2MnO_4^-+3Mn^{2+}+2H_2O\rightarrow 5MnO_2+4H^{+}$
Question 83 :
In the reaction between zinc and iodine, zinc iodide is formed. What is being oxidized?
Question 85 :
Which of the following is (are) not an example of a decomposition reaction?
Question 87 :
Ferrous sulphate decomposes with the evolution of a gas having a characteristic odour of burning sulphur. Identify the type of reaction.<br/>
Question 88 :
Which of the statements about the reaction below are incorrect ?<br/>$2PbO(s) + C(s) \rightarrow 2Pb(s) + CO_2(g)$<br/><br/>(a) Lead is getting reduced.<br/>(b) Carbon dioxide is getting oxidised.<br/>(c) Carbon is getting oxidised.<br/>(d) Lead oxide is getting reduced
Question 90 :
When nitrogen reacts with hydrogen under high temperature and pressure to form ammonia gas. This is an example of:
Question 91 :
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 92 :
The digestion of food in the body is an example of __________ reaction.
Question 93 :
Two aqueous solutions are mixed and a precipitate is formed. What type of reaction is it? 
Question 94 :
In the context of redox reactions, the gain of hydrogen from a substance is known as:
Question 95 :
Which of the following can act only as a reducing agent?<br>
Question 97 :
If the value of $n$ is $2$, then the atomic weight of metal $M$, is
Question 99 :
A quantity of $12\ g$ of magnesium is burnt completely in air $(O_{2}=20\%$ and $N_{2}=80\%$ by volume). Which of the following is/are correct statement(s) regarding this combustion?
Question 100 :
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 101 :
What mass of ammonium nitrate should be heated to produce 8.96 litres of steam? [Note : Relative molecular mass of $NH_4NO_3$ is 80]
Question 103 :
What amount of $BaSO_4$ can be obtained on mixing 0.5 mole $BaCl_2$ with 1 mole of $H_2SO_4$ ?
Question 104 : For the cell $Zn(s) |Zn^{2+} (aq) || M^{x+} (aq) | M(s)$, different half cells and their standard electrode potentials are given below:<br/><table class="wysiwyg-table"><tbody><tr><td>$M^{x+} (aq/M(s))$</td><td>$Au^{3+} (aq)/Au(s)$</td><td>$Ag^+ \, /Ag(s)$</td><td>$Fe^{3+}(aq)/Fe^{2+} (aq)$</td><td>$Fe^{2+}(aq)/Fe(s)$</td></tr><tr><td>$E^o_{M^{x+}/M^{/(V)}}$<br/></td><td>$1.40$</td><td>$0.80$</td><td>$0.77$</td><td>$-0.44$</td></tr></tbody></table><br/>If $E^o_{Zn^{2+}/Zn} = -0.76 V$, which cathode will give a maximum value of $E^o_{cell}$ per electron transferred ?
Question 105 :
A mixture of propane and benzene is burst completely in excess of oxygen at $110^{o}C$. It result the production of equal volumes of $CO_{2}(g)$ and steam (measured under identical pressure and temperature). Which of the following is correct regarding the original mixture?
Question 107 :
How much $CaO$ is to be added to the furnace charge for each $1280\ kg$ of pure $CaC_{2}$ produced ?
Question 109 :
How many grams of ammonium nitrate will be formed in the reaction?
Question 112 :
What is not a mole ratio of $ \displaystyle 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$? <br/>
Question 113 :
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 $ABC_3 \rightarrow AB +C_2$ 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) Thus the coefficients of $ABC_3$, AB and $C_2$ in the balanced chemical equation will be 2,2 & 3 respectively and the balanced chemical equation can be represented as :$2ABC_3 \rightarrow 2AB +3C_2$Now answer the following question.<br/> <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 CO and $CO_2$ . What would be the weight ratio of CO and $CO_2$  in mixture?
Question 114 :
For the reaction of sodium with water, the balanced equation using the smallest whole numbers has which of the following coefficients?<br/>I. $1$<br/>II. $2$<br/>III. $3$<br/>Select the correct option.<br/>
Question 115 :
Consider the following statements.<br/><br/>1. If all the reactants are not taken in their stoichiometric ratio, then at least one reactant will be left behind.<br/><br/>2. 2 moles of $H_2(g)$ and 3 moles of $O_2 (g)$ produce 2 moles of water.<br/><br/>3. If equal weights of carbon and oxygen are taken to produce $CO_2$, then $O_2$ is limiting reagent.<br/><br/>The above statements 1, 2, 3 respectively are (T = True, F = False):
Question 116 :
A metal ($A$) on heating in nitrogen gas gives compound $B$. $B$ on treatment with ${H}_{2}O$ gives a colourless gas which when passed through $Cu{SO}_{4}$ solution gives a dark blue-violet coloured solution. $A$ and $B$ respectively, are :
Question 118 :
Minimum amount of $Ag_2CO_3$ (s) required to produce sufficient amount of oxygen for the complete  combustion of $C_2H_2$ which produces 11.2 L of $CO_2$ at STP after combustion is_________.<br/>$Ag_2CO_3 (s) \, \rightarrow\, 2Ag (s)\, +\, CO_2 (g)\, +\, \dfrac12 O_2 (g)$<br/>$C_2H_2\, +\, \dfrac52 O_2\, \rightarrow\, 2CO_2\, +\, H_2O$<br/>
Question 119 :
The equation which is balanced and represents the correct product is:
Question 120 :
A quantity of $6\ g\ NaOH$ and $4.4\ g\ CO_{2}$ is allowed to react to form $Na_{2}CO_{3}$ or $NaHCO_{3}$ or both. Which of the following is correct statement regarding the reaction?
Question 123 :
Which of the following chemical reaction is balanced as well as is combustion reaction?
Question 124 :
The reaction, when balanced, $m, n, p$ and $q$ are respectively:<br/>$K_2Cr_2O_7+ \ m FeSO_4+n H_2SO_4\rightarrow Cr_2(SO_4)_3+pFe_2(SO_4)_3+K_2SO_4+qH_2O$ 
Question 125 :
What is the minimum mass of ${ CaCO }_{ 3 }(s)$, below which it decomposes completely, required to established equilibrium in a $6.50\ litre$ container for the reaction:<br/>${ CaCO }_{ 3 }(s)\rightleftharpoons CaO(s)+{ CO }_{ 2 }(g);\space { K }_{ c }=0.005\ mole/litre$<br/>
Question 126 :
A quantity of 5.68 g of pure $ P_{4}O_{10} $ is dissolved completely in sufficient water and the solution is diluted to 250 ml. Which of the following statement (s) is/are correct?
