Question 3 :
A hard and resistant alloy generally used in tip of nib of pen is:
Question 4 : The 3 <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead6ae741e6ca4117818f76"> -block element that exhibits maximum number of oxidation states is
Question 8 : Which compound does not dissolve in hot, dil. <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead6aec41e6ca4117818f87"> ?
Question 9 :
In chromite ore, the oxidation number of iron and chromium are respectively.
Question 10 :
Mac Arthur and Forest cyanide process is used in the extraction of:
Question 11 :
In context of the lanthanoids, which of the following statements is not correct?
Question 13 :
Dissolving metallic {tex} \mathrm { Zn } {/tex} in excess of {tex} \mathrm { NaOH } {/tex} produces :-
Question 14 :
In which metals metallurgical process carbon is used for reduction of metal oxides?
Question 16 : When oxyhaemoglobin changes to deoxyhaemoglobin, <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead6b05381c2135355c800b"> ion changes from
Question 18 :
Number of electrons present in the outermost orbit of Fe atom is:
Question 21 :
Cerium (Z = 58) is an important member of the lanthanides. Which of the following statements about cerium is incorrect?
Question 24 :
When metallic copper comes in contact with moisture, a green power/pasty coating can be seen over it. This is chemically known as
Question 27 : From gold aurocyanide <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead6bee6694ca4eac0fd03f"> , gold can be precipitated by adding powder of:
Question 28 :
Which one of the following metals, is extracted on smelting of its ore in blast furnace?
Question 35 : An aqueous solution of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead6c0241e6ca41178190fe"> and chrome alum is heated with excess of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead6c026694ca4eac0fd07f"> and filtered. The materials obtained are:
Question 38 :
The formula mass of Mohr's salt is {tex}392{/tex} . The iron present in it is oxidised by {tex} \mathrm { KMnO } _ { 4 } {/tex} in acid medium. The equivalent mass of Mohr's salt is
Question 39 : When dil. <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead6af886ab836963764155"> is added to aqueous solution of potassium chromate, yellow colour of solution turns to orange colour. It indicates
Question 42 :
The smelting of iron in a blast furnace involves the following processes:
Question 44 :
Most of the transition metals are paramagnetic due to the presence of:
Question 45 :
Which substance can be used in the preparation of making ink?
Question 47 :
Which of the following statement is incorrect about {tex} \left[ \mathrm { Fe } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 5 } \mathrm { NO } \right] \mathrm { SO } _ { 4 }: {/tex} -
Question 48 : The reason for the stability of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead6bf041e6ca41178190c2"> ion is
Question 50 :
Which lanthanoid compound is used as a most powerful liquid lasers after dissolving it in selenium oxychloride?
Question 51 :
Select correct statement for the lesser number of oxidations states in 3d-series.
Question 52 :
Among the following outermost configurations of transition metals, which shows the highest oxidation state.
Question 53 :
The number of equivalents of  $Na_{2} S_{2} O_{3}$ required for the volumetric estimation of one equivalent of $Cu^{2+}$ is:<br/>
Question 54 :
Among the following outermost configuration of transition metals which shows the highest oxidation state, is:
Question 55 :
Choose the correct answer from the alternative given.<br/>$E^{o}_{Mn^{3+}}/Mn^ {2+}$ is highly positive than that of $E^o_{Cr^{3+}}/Cr^ {2+}$or $E^o_{Fe^{3+}}/Fe^ {2+}$because:
Question 56 :
Which of the following species will be the strongest Lewis acid?
Question 58 :
The transitional metal which form green compound in +3 oxidation state and yellow-orange compound in +6 oxidation state is
Question 59 :
Which of the following series of elements have nearly the same atomic radii?
Question 60 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left">Which of the following transition metal has the highest melting point?<br/></p>
Question 62 :
In which of the following compound transition metal has zero oxidation state?
Question 63 :
The numbers of d-electrons retained in $Fe^{2+}$ (atomic number $Fe=26$) ion is:
Question 64 :
In context with the transition elements, which of the following statements is incorrect?
Question 72 :
Which of the following metal has more than one oxidation state?
Question 76 : <div>What is the correct order of size in each pair given below ?<br/></div><div>$Cu  $ and $Z n$</div>
Question 77 :
What is the atomic number of the element with $M^{2+}$ ion having electronic configuration $[Ar]3d^{8}$?
Question 78 :
Which one of the following statement is true for transition elements?
Question 79 :
Assertion: $NaBO_{3} / OH^{-}$ can be used for oxidation of $Cr^{3+}$ to $Cr^{6+}$
Reason: In alkaline medium $NaBO_{3}$ produces $H_{2}O_{2}$
Question 81 :
Which of the following ions will exhibit colour in aqueous solutions?
Question 83 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left">How many unpaired electrons are present in $Ni^{2+}$ ion?</p>
Question 84 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p>Transition elements have high MP & BP due to:</p>
Question 86 :
In which of the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other?
Question 89 :
The compound in which nickel has the lowest oxidation state is:
Question 90 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left"><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">The correct order of ionic radius for $Y^{3+}, La^{3+},Eu^{3+}$ and $Lu^{3+}$</span></span><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"> </span></span><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">is:</span></span></p>
Question 91 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left">Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?                   </p>
Question 93 :
Which of the following statements are correct about $Zn,Cd$ and $Hg$?<br>$(I)$ they exhibit high enthalpies of atomisation as the $d$-subshell is full<br>$(II)$ $Zn$ and $Cd$ do not show variable oxidation states while $Hg$ shows $+I$ and $+II$<br>$(III)$ Compound of $Zn,Cd$ and $Hg$ are paramagnetic in nature<br>$(IV)$ $Zn,Cd$ and $Hg$ are called soft metals.<br>
Question 94 :
In first transition series, the melting point of Mn is low because
Question 95 :
Dipositive zinc exhibits paramagnetism due to loss of two electrons from 3d-orbitals of neutral atom.
Question 96 :
For successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy?
Question 97 :
Order of magnitude of density of Uranium nucleous is: $[m_{p}=1.67 \times 10^{-27}kg]$
Question 101 :
Chooe the correct amswer using given codes. Use T if statement is true and F if it is false.<br/>(I) Sulphide ions reacts with $Na_2[Fe (CN)_5 (NO)]$ to form a purple coloured compound $Na_4[Fe (CN)_5 (NOS)]$. In the reaction, the oxidation state of iron changes.<br/>(II) $Pt(IV)$ compounds are relatively more stable than $Ni(IV)$ compounds.<br/>(III) The welding of magnesium can be done in the atmosphere of helium.<br/>(IV) $LiAIH_4$ on hydrolysis will give $H_2$.
Question 102 :
Assertion: $K_2PtCl_6$ is well-known compound whereas corresponding $Ni$ compound is not known.
Reason: $Pt^{+4}$ is thermodynamically more stable than $Ni^{+4}$.
Question 103 :
The equivalent weight of $MnO_{2}$ is equal to its molecular weight when it is converted to:<br/>
Question 104 :
A solution of metallic ion when treated with $KI$ gives a red precipitate which dissolves in excess of $KI$ to give a colourless solution. Moreover, the solution of metal ion on treatment with solution of cobalt(II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is:
Question 105 :
In which of the following oxoanions the oxidation state of central atom is not same as that of its group number in periodic table?
Question 109 :
Calculate magnetic moment of $Mn$ in $MnO^-_4 $ $ x$ unpaired electrons on $Mn$ in $MnO^-_4\, y$ BM. <br/>$x, \, y$ are respectively:
Question 111 :
Among the following, the species that is both paramagnetic and coloured is :
Question 113 :
Copper becomes green when exposed to moist air for a long period. This is due to :
Question 114 : Select the correct order with respect to the basic character of the transition metal monoxides. <div>(Atomic number in amu of $Ti = 22,\ V = 23,\ Cr = 24,\ Fe = 26)$<br/></div>
Question 116 :
Which of the following is true for the species having 3d$^4$ configuration?
Question 117 :
Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy? 
Question 118 : <div>Consider a reaction sequence as follows:</div>$FeCr_2O_4 + Na_2CO_3 + O_2 \xrightarrow{Fusion} [X]  \underset{H_2O}{\xrightarrow{H^+}} [Y] \underset{H_2O_2}{\xrightarrow{H^+}}[Z]$<br/>Which of the following statements is true for the compounds [X], [Y] and [Z]?
Question 119 :
Atoms of the transition element are smaller than those of the s-block elements. This is because of  :
Question 121 :
The oxidation state of chromium in the final product formed by the reaction between $KI$ and acidified $K_{2}Cr_{2}O_{7}$ solution is:
Question 122 :
The main product obtained when a solution of sodium carbonate reacts with mercuric chloride is
Question 124 :
Assertion: The difference in the successive oxidation states exhibited by transition elements is unity only
Reason: d orbitals of transition elements are incompletely filled
Question 125 :
Mercury is the only metal which is liquid at $ 0^o C $. This is due to its 
Question 126 :
The equilibrium established when $HgCl_2$  is shaken with an excess of $Hg$ is: 
Question 127 :
Statement 1 : A piece of zinc placed in a blue copper nitrate solution will displace the copper from the solution, producing copper metal and a colorless $\displaystyle { Zn }^{ 2+ }$ solution.<br/>Statement 2 : Copper is a much more active metal than zinc.
Question 129 :
The pair of compounds having metals in their highest oxidation state is?
Question 130 :
When acetic and $K_4Fe(CN)_6$ is added to a copper salt a chocolate precipitate is obtained of the compound.<br/>
Question 132 :
Arrange the following species in the increasing order of their magnetic moment.<br/>$(I)\ VCl_3\ \ (II)\ \ VOSO_4\ \ (III)\ Na_3VO_4\ \ (IV)\ [V(H_2O)_6]SO_4. H_2O$<br/>
Question 133 :
Copper becomes green when exposed to moist air for a long period of time due to the
Question 134 :
Assertion: AgBr is used in photography.
Reason: AgBr undergoes photochemical reaction.
Question 135 :
$AgCl$ dissolves in a solution of $ NH_3 $ but not in water because 
Question 136 :
Among the following pairs of ions, which pair has a lower oxidation state in aqueous solution more stable than the other?
Question 137 :
Which one of the following species is stable in aqueous solution<br>
Question 138 :
Ammonium dichromate is used in some fire works. The green colour powder below in air is:
Question 139 :
$Mn^{2+}$ compounds are more stable than $Fe^{2+}$ compounds towards oxidation to their $+3$ state, because :
Question 140 :
The atomic number of vanadium (V), chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26 which one of these may be expected to have the highest second ionization enthalpy: 
Question 141 :
Assertion: For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7 - 9 elements.
Reason: The reactants are most strongly adsorbed on group 7 - 9 elements.
Question 142 :
Assertion: The number of unpaired electrons in the following gaseous ions:<br>$Mn^{3+}, Cr^{3+}, V^{3+} $ and $Ti^{3+}$ are 4, 3, 2 and 1 respectively.
Reason: Among these Cr$^{3+}$ is most stable in aqueous solution.
