Question 8 : Elements of IIA group having electronic configuration <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea8d274fdd8313cc8728626"> are called alkaline earth elements because:
Question 9 : Anhydrous magnesium chloride can be prepared by heating <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea8d274fdd8313cc8728628"> :
Question 11 :
Alkali metals have high oxidation potential and hence, they behave as
Question 19 :
Which of the following metals is extracted by the electrometallurgical method?
Question 20 :
The major role of fluorspar {tex}\mathrm {(CaF)}{/tex} which is added in small quantity in the electrolytic reduction of alumina dissolved in fused cryolite {tex} \left( \mathrm { Na } _ { 3 } \mathrm { AlF } _ { 6 } \right) {/tex} is :- <br>(a) as a catalyst <br>(b) to make the fused mixture very conducting <br>(c) to lower the temperature of melting <br>(d) to decrease the rate of oxidation of carbon at the anode
Question 22 :
Metals belonging to the same group in the periodic table are:
Question 31 :
The solubilities of carbonates decrease down the magnesium group due to decrease in
Question 32 :
Which on mixing with water gives a hissing sound and becomes very hard?
Question 36 :
One of the elements present in carnallite shows flame colouration. The colour of the flame is
Question 37 : Slaked lime <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea8d2a7a3d2442ab829535b"> is used in the manufacture of
Question 38 :
Lithium is the only alkali metal which is not placed in kerosene but is wrapped in paraffin wax, because:
Question 39 : <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea8d1f7fdd8313cc8728496"> is soluble in water whereas fluorides of other alkaline earth metals are insoluble because of:
Question 41 : In the Downs cell <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea8d1e7fdd8313cc872848a"> is added in <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea8d1c8a3d2442ab8295042"> to:
Question 43 :
The electrolyte employed in the extraction of sodium by Downs electrolysis method is:
Question 46 :
Elements of group 1 and group VI in the periodic table have one thing common. That is with the increasing atomic number, the:
Question 47 : When one mole of bleaching powder is completely decomposed in presence of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea8d1cca3d2442ab829505f"> then the mass of chlorine gas that is liberated will be:
Question 48 :
In which of the following molecule central atom is having complete octet
Question 53 :
Which of the following oxyacid contains both $P - H$ and $P - P$ bond simultaneously ?
Question 55 :
The correct increasing order of covalent character of LiCl, LiBr, LiI is:<br/>
Question 59 : The table shows some reactions of a white compound, G.<br/><br/><table class="wysiwyg-table"><tbody><tr><td>Test</td><td>Observation</td></tr><tr><td>Silver nitrate is added to a solution of G followed by aqueous ammonia</td><td>A precipitate is formed which does not dissolve when the ammonia is added</td></tr><tr><td>Solid G is warmed with concentrated sulfuric acid</td><td>A mixture of gases is formed including hydrogen sulphide</td></tr></tbody></table><br/><div>What could be the identity of G?<br/></div>
Question 60 :
For two ionic solids $ CaO $ and $ KI $ identify the wrong statement among the following ?<br><br>
Question 61 :
What is the biological importance of $Na^+$ and $K^+$ ions in cell fluids like blood plasma?
Question 62 :
A typical $70$ kg man constitutes $X$ kg of sodium and $Y$ kg of potassium?
Question 66 :
Which of the following compound is the final product of Solvay process?
Question 68 :
Statement 1: Crystals of sodium chloride go into aqueous solution as ions.<br/>Statement 2: The sodium ion has a $1+$ change and the chloride ion has a $1-$ charge and they are hydrated by the water molecules.
Question 69 :
The properties of lithium are similar to those of Mg.<br>This is because
Question 70 :
A metal M reacts with nitrogen to give nitride which on reaction with water produces ammonia gas. Metal M can be:
Question 72 :
Lithium shows similarities with magnesium in its chemical behaviour because :<br>
Question 75 :
Nature of $CO$ when it reacts with $NaOH$ is acidic. State True or False:<br/>
Question 76 :
Which of the following statements about {tex} \mathrm { H } _ { 3 } \mathrm { BO } _ { 3 } {/tex} is not correct?
Question 77 :
If {tex} \mathrm { x } {/tex} pentagonal rings and {tex} \mathrm { y } {/tex} hexagonal Rings are present in fullerene of {tex} \mathrm { z } {/tex} carbon atoms then :-
Question 78 :
The stability of dihalides of {tex}\mathrm{Si, Ge, Sn}{/tex} and {tex}\mathrm{Pb}{/tex} increases steadily in the sequence
Question 79 :
The catenation tendency of {tex} \mathrm { C } , \mathrm { Si } {/tex} and {tex} \mathrm { Ge } {/tex} is in the order {tex} \mathrm { Ge } < \mathrm { Si } < \mathrm { C } {/tex}. The bond energies {tex} \left( \mathrm { inkJ } \mathrm { mol } ^ { - 1 } \right) {/tex} of {tex} \mathrm { C } - \mathrm { C } , \mathrm { Si- \ Si } {/tex} and {tex} \mathrm { Ge-Ge} {/tex} bonds are respectively<br>
Question 80 :
Method used for obtaining highly pure silicon, used as a semiconductor material, is
Question 81 :
Specify the coordination geometry around and hybridization of {tex} \mathrm { N }{/tex} and {tex} \mathrm { B }{/tex} atoms in a {tex}1: 1{/tex} complex of {tex} \mathrm { BF }_ { 3 } {/tex} and {tex} \mathrm { NH } _ { 3 } {/tex}
Question 85 :
Carbon and silicon belong to group {tex} 14 . {/tex} The maximum coordination number of carbon in commonly occurring compounds is {tex} 4 , {/tex} whereas that of silicon is {tex} 6 . {/tex} This is due to
Question 87 :
Which one of the following molecular hydrides acts as a Lewis acid?
Question 88 :
Carbon and silicon belong to (IV) group. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6. This is due to
Question 89 :
Which of the following statements about {tex} \mathrm { H } _ { 3 } \mathrm { BO } _ { 3 } {/tex} is not correct?
Question 91 :
{tex} \mathrm { CO } _ { 2 } {/tex} and {tex} \mathrm { N } _ { 2 } {/tex} are non-supporters of combustion. However for putting out fires {tex} \mathrm { CO } _ { 2 } {/tex} is preferred over {tex} \mathrm { N } _ { 2 } {/tex} because {tex} \mathrm { CO } _ { 2 } {/tex}
Question 92 :
The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to
Question 94 :
An aqueous solution of {tex} \mathrm { FeSO } _ { 4 } , \mathrm { Al } _ { 2 } \left( \mathrm { SO } _ { 4 } \right) _ { 3 } {/tex} and chrome alum is heated with excess of {tex} \mathrm { Na } _ { 2 } \mathrm { O } _ { 2 } {/tex} and filtered. The materials obtained are:
Question 96 :
_________ helps to maintain pH of blood between 7.26 to 7.42
Question 97 :
{tex} \mathrm { Na } ^ { + } , \mathrm { Mg } ^ { 2 + } , \mathrm { Al } ^ { 3 + } {/tex} and {tex} \mathrm { Si } ^ { 4 + } {/tex} are isoelectronic, their ionic size will follow the order
Question 98 :
The {tex} \mathrm { BCl } _ { 3 } {/tex} is a planar molecule whereas {tex} \mathrm { NCl } _ { 3 } {/tex} is pyramidal because
Question 99 :
Which of the following statement(s) is/are incorrect?<br>(i) Trichlorides on hydrolysis in water form tetrahedral {tex} \left[ \mathrm { M } ( \mathrm { OH } ) _ { 4 } \right] ^ { - } {/tex} species.<br> (ii) Hybridisation state of metal in tetrahedral species is {tex} \mathrm { sp } ^ { 3 } {/tex}. <br>(iii) Aluminium chloride in acidified aqueous solution forms {tex} \left[ \mathrm { Al } ( \mathrm { OH } ) _ { 4 } \right] ^ { - } {/tex} ion.<br>
Question 100 :
On adding ammonium hydroxide solution to {tex} \mathrm { Al } _ { 2 } \left( \mathrm { SO } _ { 4 } \right) _ { 3 } ( \mathrm { aq } ): {/tex}
Question 101 :
Which of the following statement(s) is/are incorrect?<br>(i) Higher boranes are not flammable.<br> (ii) Boranes are hydrolysed by water to give orthoboric acid.?<br> (iii) Boranes undergoes cleavage reactions with Lewis bases to give borane adducts.<br>
Question 102 :
{tex} \mathrm { R } _ { 3 } \mathrm { SiCl } {/tex} on hydrolysis forms
Question 105 :
A solid element (symbol {tex}\mathrm{Y}{/tex}) conducts electricity and forms two chlorides {tex}\mathrm{YCl_n}{/tex} (colourless volatile liquid) and {tex}\mathrm{YCl_{n-2}}{/tex} (a colourlesssolid). To which one of the following groups of the periodic table does {tex}\mathrm{Y}{/tex} belong?
Question 106 :
{tex} \mathrm { B } ( \mathrm { OH } ) _ { 3 } + \mathrm { NaOH } \rightarrow \mathrm { NaBO } _ { 2 } + \mathrm { Na } \left[ \mathrm { B } ( \mathrm { OH } ) _ { 4 } \right] + \mathrm { H } _ { 2 } \mathrm { O } {/tex}<br>How can this reaction is made to proceed in forward direction?
Question 109 :
Ge(II) compounds are powerful reducing agents. whereas Pb(IV) compounds are strong oxidants. It is because
Question 110 :
The structure and hybridization of {tex} \mathrm { Si } \left( \mathrm { CH } _ { 3 } \right) _ { 4 } {/tex} is
Question 112 :
Which of the following oxidation states are the most characteristic for lead and tin respectively?
Question 113 :
Choose the correct sequence for the geometry of the given molecules Borazone, Borazole, {tex} \mathrm { B } _ { 3 } \mathrm { O } _ { 6 } ^ { 3 - } {/tex} [P' stands for planar and "N' stands for non- planar]
Question 114 :
Name the two type of the structure of silicate in which one oxygen atom of {tex} \left[ \mathrm { SiO } _ { 4 } \right] ^ { 4- } {/tex} is shared?
Question 116 :
Which of the following statement(s) is / are incorrect for {tex} \mathrm { CO } _ { 2 } ? {/tex}<br>(i) Iaboratory {tex} \mathrm { CO } _ { 2 } {/tex} is prepared by the action of dilute {tex} \mathrm { HCl } {/tex} on calcium carbonate<br>(ii) Carbon dioxide is a poisonous gas<br> (iii) Increase in carbon dioxide content in atmosphere lead to increase in green house effect.<br> (iv) {tex} \mathrm { CO } _ { 2 } {/tex} as dry ice is used as a refrigerant for ice cream and frozen food.<br>
Question 117 :
Which of the following properties of aluminium makes it useful for food packaging?
Question 122 :
{tex} \mathrm { AlI } _ { 3 } , {/tex} when reacts with {tex} \mathrm { CCl } _ { 4 } , {/tex} gives
Question 124 :
Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is
Question 126 :
{tex} \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } {/tex} can be converted to anhydrous {tex}\mathrm{AlCl} _ { 3 } {/tex} by heating
Question 128 :
Which one of the following is a correct set for {tex} \mathrm { SiO } _ { 2 } ? {/tex}
Question 129 :
Which one of the following statements about the zeolite is false?
Question 130 :
Which of the following species exists (A) {tex} \left[ \mathrm { SiF } _ { 6 } \right] ^ { 2 - } , {/tex} (B) {tex} \left[ \mathrm { GeCl } _ { 6 } \right] ^ { 2 - } {/tex} and (C) {tex} \mathrm { } \left[ \mathrm { CCl } _ { 6 } \right] ^ { 2 - } ? {/tex}
Question 132 :
In view of the signs of {tex} \Delta _ { r } G ^ { \circ } {/tex} for the following reactions:<br>{tex} \begin{array} { l l } { \mathrm { PbO } _ { 2 } + \mathrm { Pb } \rightarrow 2 \mathrm { PbO } , } & { \Delta _ { r } \mathrm G ^ { \circ } < 0 } \\ { \mathrm { SnO } _ { 2 } + \mathrm { Sn } \rightarrow 2 \mathrm { SnO } , } & { \Delta _ { r } \mathrm G ^ { \circ } > 0 } \end{array} {/tex}<br>Which oxidation states are more characteristics for lead and {tex} \operatorname { tin } ? {/tex}
Question 133 :
Identify the statement that is not correct as far as structure of diborane is concerned
Question 134 :
Often a ground glass stopper gets stuck in the neck of a glass bottle containing {tex}\mathrm{NaOH}{/tex} solution. This is due to :
Question 135 :
In the following sets of reactants which two sets best exhibit the amphoteric characters of<br>{tex} \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } \cdot \mathrm { xH } _ { 2 } \mathrm { O } ? {/tex}<br>Set {tex} 1: \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } \cdot \mathrm { xH } _ { 2 } \mathrm { O } ( \mathrm { s } ) {/tex} and {tex} \mathrm { OH } ^ { - } ( \mathrm { aq } ) {/tex}<br> Set {tex} 2: \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } \cdot \mathrm { xH } _ { 2 } \mathrm { O } ( \mathrm { s } ) {/tex} and {tex} \mathrm { H } _ { 2 } \mathrm { O } ( \mathrm { l } ) {/tex}<br> Set {tex} 3: \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } \cdot \mathrm { xH } _ { 2 } \mathrm { O } ( \mathrm { s } ) {/tex} and {tex} \mathrm { H } ^ { + } ( \mathrm { aq } ) {/tex}<br> Set {tex} 4: \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } \cdot \mathrm { xH } _ { 2 } \mathrm { O } ( \mathrm { s } ) {/tex} and {tex} \mathrm { NH } _ { 3 } ( \mathrm { aq } ) {/tex}
Question 136 :
{tex} \mathrm { PbF } _ { 4 } , \mathrm { PbCl } _ { 4 } {/tex} exist but {tex}\mathrm{PbBr} _ { 4 } {/tex} and {tex} \mathrm { PbI } _ { 4 } {/tex} donot exist because of
Question 137 :
{tex}\mathrm{AlF_{3}}{/tex} is soluble in {tex}\mathrm{HF}{/tex} only in presence of {tex}\mathrm{KF}{/tex}. It is due to the formation of
Question 138 :
Which of these is not a monomer for a high molecular mass silicone polymer?
Question 141 :
Which among the following oxides react with alkali?<br> {tex} \mathrm { B } _ { 2 } \mathrm { O } _ { 3 } , \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } {/tex} and {tex} \mathrm { Tl } _ { 2 } \mathrm { O } {/tex}
Question 144 :
In reaction {tex} 8 \mathrm { BF } _ { 3 } + 6 \mathrm { LiH } \stackrel { \Delta } { \longrightarrow } \mathrm { X } + \mathrm { LiBF } _ { 4 } {/tex}<br>
Question 145 :
Among the following molecules<br> (i) {tex} \operatorname { XeO } _ { 3 } {/tex} (ii) {tex} \operatorname { XeOF } _ { 4 } {/tex} (iii) {tex} \operatorname { XeF } _ { 6 } {/tex} <br>Those having same number of lone pairs on {tex}\mathrm{Xe}{/tex} are
Question 147 :
It is because of inability of {tex} \mathrm{n s} ^ { 2 } {/tex} electrons of the valence shell to participate in bonding that
Question 148 :
Bauxite ore is generally contaminated with impurity of oxides of two elements {tex}\mathrm X {/tex} and {tex}\mathrm Y . {/tex} Which of the following statement is correct?
