2025
NEET
MCQ
NEET 2025
Which one of the following reactions does NOT belong to "Lassaigne's test"?
A.
$\mathrm{Na}+\mathrm{X} \xrightarrow[\Delta]{ }+\mathrm{NaX}$
B.
$2 \mathrm{CuO}+\mathrm{C} \xrightarrow[\Delta]{ } 2 \mathrm{Cu}+\mathrm{CO}_2$
C.
$\mathrm{Na}+\mathrm{C}+\mathrm{N} \underset{\Delta}{\longrightarrow} \mathrm{NaCN}$
D.
$2 \mathrm{Na}+\mathrm{S} \underset{\Delta}{\longrightarrow} \mathrm{Na}_2 \mathrm{~S}$
2023
NEET
MCQ
NEET 2023 Manipur
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Lithium and beryllium unlike their other respective group members form compounds with pronounced ionic character.
Reason (R) : Lithium and Magnesium have similar properties due to diagonal relationship.
In the light of the above statements, choose the correct answer from the options given below:
A.
(A) is true but (R) is false.
B.
(A) is false but (R) is true.
C.
Both (A) and (R) are true and (R) is the correct explanation of (A).
D.
Both (A) and (R) are true but (R) is not the correct explanation of (A).
2023
NEET
MCQ
NEET 2023
Given below are two statements : one is labelled as Assertion $\mathbf{A}$ and the other is labelled as Reason $\mathbf{R}$ :
Assertion A : Metallic sodium dissolves in liquid ammonia giving a deep blue solution, which is paramagnetic.
Reason R : The deep blue solution is due to the formation of amide.
In the light of the above statements, choose the correct answer from the options given below :
A.
Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is NOT the correct explanation of $\mathbf{A}$.
B.
$\mathbf{A}$ is true but $\mathbf{R}$ is false
C.
$\mathbf{A}$ is false but $\mathbf{R}$ is true
D.
Both $\mathbf{A}$ and $\mathbf{R}$ are true and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$.
2023
NEET
MCQ
NEET 2023
Which one of the following statements is correct?
A.
All enzymes that utilise ATP in phosphate transfer require $\mathrm{Ca}$ as the cofactor.
B.
The bone in human body is an inert and unchanging substance.
C.
$\mathrm{Mg}$ plays roles in neuromuscular function and interneuronal transmission.
D.
The daily requirement of $\mathrm{Mg}$ and $\mathrm{Ca}$ in the human body is estimated to be 0.2 - 0.3 $\mathrm{g}$.
2023
NEET
MCQ
NEET 2023
Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in presence of calcium oxide is :
A.
32
B.
30
C.
18
D.
16
2022
NEET
MCQ
NEET 2022 Phase 2
The element used for welding metals with high melting points is
A.
He
B.
Cl2
C.
H2
D.
Ne
2022
NEET
MCQ
NEET 2022 Phase 2
CaCl2 and Ca(OCl)2 are components of
A.
Lime water
B.
Gypsum
C.
Portland cement
D.
Bleaching powder
2022
NEET
MCQ
NEET 2022 Phase 2
Which one of the following is not a calcination reaction?
A.
CaCO3 + 2HCl $\buildrel \Delta \over
\longrightarrow $ CaCl2 + H2O + CO2
B.
ZnCO3 $\buildrel \Delta \over
\longrightarrow $ ZnO + CO2
C.
Fe2O3 . xH2O $\buildrel \Delta \over
\longrightarrow $ Fe2O3 + xH2O
D.
CaCO3 . MgCO3 $\buildrel \Delta \over
\longrightarrow $ CaO + MgO + 2CO2
2022
NEET
MCQ
NEET 2022 Phase 1
Identify the incorrect statement from the following
A.
Alkali metals react with water to form their hydroxides.
B.
The oxidation number of K in KO2 is +4.
C.
Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
D.
Lithium is the strongest reducing agent among the alkali metals.
2022
NEET
MCQ
NEET 2022 Phase 1
Match List - I with List - II
| List - I | List - II | ||
|---|---|---|---|
| (a) | Li | (i) | absorbent for carbon dioxide |
| (b) | Na | (ii) | electrochemical cells |
| (c) | KOH | (iii) | coolant in fast breeder reactors |
| (d) | Cs | (iv) | photoelectric cell |
Choose the correct answer from the options given below :
A.
(a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)
B.
(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
C.
(a) - (i), (b) - (iii), (c) - (iv), (d) - (ii)
D.
(a) - (ii), (b) - (iii), (c) - (i), (d) - (iv)
2021
NEET
MCQ
NEET 2021
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is :
A.
Beryllium chloride
B.
Calcium chloride
C.
Strontium chloride
D.
Magnesium chloride
2021
NEET
MCQ
NEET 2021
The structures of beryllium chloride in solid state and vapour phase, are :
A.
Chain in both
B.
Chain and dimer, respectively
C.
Linear in both
D.
Dimer and Linear, respectively
2020
NEET
MCQ
NEET 2020 Phase 1
The following metal ion activities many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.
A.
Copper
B.
Calcium
C.
Potassium
D.
Iron
2020
NEET
MCQ
NEET 2020 Phase 1
HCl was passed through A solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallize(s)?
A.
Only NaCl
B.
Only MgCl2
C.
NaCl, MgCl2 and CaCl2
D.
Both MgCl2 and CaCl2
2019
NEET
MCQ
NEET 2019
Which of the following is an amphoteric hydroxide?
A.
Mg(OH)2
B.
Be(OH)2
C.
Sr(OH)2
D.
Ca(OH)2
2019
NEET
MCQ
NEET 2019
Enzymes that utilize ATP is phosphate transfer require an alkaline earth metal (M) as the cofactor. M is
A.
Ca
B.
Sr
C.
Be
D.
Mg
2018
NEET
MCQ
NEET 2018
Magnesium reacts with an element (X) to form
an ionic compound. If the ground state
electronic configuration of (X) is 1s22s22p3,
the simplest formula for this compound is
A.
Mg2X3
B.
MgX2
C.
Mg2X
D.
Mg3X2
2018
NEET
MCQ
NEET 2018
Among CaH2
, BeH2
, BaH2
, the order of ionic
character is
A.
BeH2
< CaH2
< BaH2
B.
CaH2
< BeH2
< BaH2
C.
BeH2
< BaH2
< CaH2
D.
BaH2
< BeH2
< CaH2
2017
NEET
MCQ
NEET 2017
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?
A.
K
B.
Rb
C.
Li
D.
Na
2016
NEET
MCQ
NEET 2016 Phase 2
In context with beryllium, which one of the following statements is incorrect?
A.
It is rendered passive by nitric acid.
B.
It forms Be2C
C.
Its salts rarely hydrolyze.
D.
Its hydride is electron-deficient and polymeric.
2016
NEET
MCQ
NEET 2016 Phase 2
The suspension of slaked lime in water is known as
A.
lime water
B.
quick lime
C.
milk of lime
D.
aqueous solution of slaked lime.
2016
NEET
MCQ
NEET 2016 Phase 1
The product obtained as a result of a reaction of nitrogen with CaC2 is
A.
CaCN2
B.
Ca2CN
C.
Ca(CN)2
D.
CaCN
2016
NEET
MCQ
NEET 2016 Phase 1
Which of the following statments is false?
A.
Ca2+ ions are not important in maintaining the regular beating of the heart.
B.
Mg2+ ions are important in the green parts of the plants.
C.
Mg2+ ions form a complex with ATP.
D.
Ca2+ ions are important in blood clotting.
2015
NEET
MCQ
AIPMT 2015
20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample?
(At. wt. of Mg = 24)
(At. wt. of Mg = 24)
A.
96
B.
60
C.
84
D.
75
2015
NEET
MCQ
AIPMT 2015
On heating which of the following releases CO2 most easily?
A.
Na2CO3
B.
MgCO3
C.
CaCO3
D.
K2CO3
2015
NEET
MCQ
AIPMT 2015 Cancelled Paper
The function of ''Sodium pump'' is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?
A.
K+
B.
Fe2+
C.
Ca2+
D.
Mg2+
2015
NEET
MCQ
AIPMT 2015 Cancelled Paper
Solubility of the alkaline earth metal sulphates in water decreases in the sequence
A.
Sr > Ca > Mg > Ba
B.
Ba > Mg > Sr > Ca
C.
Mg > Ca > Sr > Ba
D.
Ca > Sr > Ba > Mg
2013
NEET
MCQ
NEET 2013 (Karnataka)
In Castner-Kellner cell for production of sodium hydroxide
A.
brine is electrolyzed using graphite electrodes
B.
molten sodium chloride is electrolysed
C.
sodium amalgam is formed at mercury cathode
D.
brine is electrolyzed with Pt electrodes
2012
NEET
MCQ
AIPMT 2012 Prelims
Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air?
A.
Rb
B.
K
C.
Li
D.
Na
2012
NEET
MCQ
AIPMT 2012 Prelims
The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resins follows the order :
A.
Li+ < K+ < Na+ < Rb+
B.
Rb+ < K+ < Na+ < Li+
C.
K+ < Na+ < Rb+ < Li+
D.
Na+ < Li+ < K+ < Rb+
2011
NEET
MCQ
AIPMT 2011 Mains
Match List-I with List-II for the compositions of substances and select the correct answer using the code given above.
| List-I (Substances) |
List-II (Composition) |
||
|---|---|---|---|
| (A) | Plaster of Pairs | (i) | CaSO4$ \cdot $2H2O |
| (B) | Epsomite | (ii) | CaSO4$ \cdot $1/2 H2O |
| (C) | Kieserite | (iii) | MgSO4$ \cdot $7H2O |
| (D) | Gypsum | (iv) | MgSO4$ \cdot $H2O |
| (v) | CaSO4 | ||
A.
(A)-(iii), (B)-(iv), (C)-(i), (D)-(ii)
B.
(A)-(ii), (B)-(iii), (C)-(iv), (D)-(i)
C.
(A)-(i), (B)-(ii), (C)-(iii), (D)-(iv)
D.
(A)-(iv), (B)-(iii), (C)-(ii), (D)-(i)
2011
NEET
MCQ
AIPMT 2011 Prelims
Which one of the following is present as an active ingredient in bleaching powder for bleaching action?
A.
CaOCl2
B.
Ca(OCl)2
C.
CaO2Cl
D.
CaCl2
2011
NEET
MCQ
AIPMT 2011 Prelims
Which of the following compounds has the lowest melting point?
A.
CaCl2
B.
CaBr2
C.
CaI2
D.
CaF2
2010
NEET
MCQ
AIPMT 2010 Mains
The compound A on heating gives a colourless gas and a residue that is dissolved in water to obtain B. Excess of CO2 is bubbled through aqueous solution of B, C is formed which is recovered in the solid form. Solid C on gentle heating gives back A. The compound is
A.
CaCO3
B.
Na2CO3
C.
K2CO3
D.
CaSO4$ \cdot $2H2O
2010
NEET
MCQ
AIPMT 2010 Prelims
Which one of the following compounds is a peroxide?
A.
KO2
B.
BaO2
C.
MnO2
D.
NO2
2010
NEET
MCQ
AIPMT 2010 Prelims
Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?
A.
CaSO4
B.
BeSO4
C.
BaSO4
D.
SrSO4
2010
NEET
MCQ
AIPMT 2010 Prelims
Property of the alkaline earth metals that increases with their atomic number
A.
solubility of their hydroxides in water
B.
solubility of their sulphates in water
C.
ionization energy
D.
electronegativity
2009
NEET
MCQ
AIPMT 2009
Which of the following oxides is not expected to react with sodium hydroxide?
A.
CaO
B.
SiO2
C.
BeO
D.
B2O3
2009
NEET
MCQ
AIPMT 2009
In the case of alkali metals, the covalent character decreases in the order
A.
MF > MCl > MBr > MI
B.
MF > MCl > MI > MBr
C.
MI > MBr > MCl > MF
D.
MCl > MI > MBr > MF
2008
NEET
MCQ
AIPMT 2008
Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?
A.
MgCl2
B.
CaCl2
C.
SrCl2
D.
BaCl2
2008
NEET
MCQ
AIPMT 2008
The sequence of ionic mobility in aqueous solution is
A.
Rb+ > K+ > Cs+ > Na+
B.
Na+ > K+ > Rb+ > Cs+
C.
K+ > Na+ > Rb+ > Cs+
D.
Cs+ > Rb+ > K+ > Na+
2008
NEET
MCQ
AIPMT 2008
The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?
A.
NaH > LiH > KH > RbH > CsH
B.
LiH > NaH > KH > RbH > CsH
C.
CsH > RbH > KH > NaH > LiH
D.
KH > NaH > LiH > CsH > RbH
2007
NEET
MCQ
AIPMT 2007
The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3 and BeCO3 is
A.
BeCO3 < MgCO3 < CaCO3 < K2CO3
B.
MgCO3 < BeCO3 < CaCO3 < K2CO3
C.
K2CO3 < MgCO3 < CaCO3 < BeCO3
D.
BeCO3 < MgCO3 < K2CO3 < CaCO3
2007
NEET
MCQ
AIPMT 2007
In which of the following the hydration energy is higher than the lattice energy?
A.
MgSO4
B.
RaSO4
C.
SrSO4
D.
BaSO4
2006
NEET
MCQ
AIPMT 2006
The correct order of the mobility of the alkali metal ions in aqueous solution is
A.
Rb+ > K+ > Na+ > Li+
B.
Li+ > Na+ > K+ > Rb+
C.
Na+ > K+ > Rb+ > Li+
D.
K+ > Rb+ > Na+ > Li+
2004
NEET
MCQ
AIPMT 2004
A solid compound X on heating gives CO2 gas and a residue. The residue mixed with water forms Y. On passing an excess of CO2 through Y in water, a clear solution Z is obtained. On boiling Z, compound X is reformed. The compound X is
A.
Ca(HCO3)2
B.
CaCO3
C.
Na2CO3
D.
K2CO3
2002
NEET
MCQ
AIPMT 2002
In which of the following processes, fused sodium hydroxide is electrolysed at a 330oC temperature for extraction of sodium?
A.
Castner's process
B.
Down's process
C.
Cyanide process
D.
Both 'b' and 'c'