NEET 2018

The compound A on treatment with Na gives
B, and with PCl5
gives C. B and C react together
to give diethyl ether. A, B and C are in the order

In the reaction,

the electrophile involved is

Identify the major products P, Q and R in the
following sequence of reactions :

Compound A, C8H10O, is found to react with
NaOI (produced by reacting Y with NaOH) and
yields a yellow precipitate with characteristic
smell. A and Y are respectively

Carboxylic acids have higher boiling points
than aldehydes, ketones and even alcohols of
comparable molecular mass. It is due to their

Which of the following compounds can form a
zwitter ion?

The difference between amylose and amylopectin
is

In the structure of ClF3
, the number of lone
pairs of electrons on central atom ‘Cl’ is

Consider the following species : CN+
, CN–
, NO
and CN. Which one of these will have the
highest bond order?

Which one of the following conditions will
favour maximum formation of the product in
the reaction
A2(g)
+ B2(g) ⇌ X2(g)
, \(\Delta\)rH = –X kJ ?

The correct difference between first and
second order reactions is that

When initial concentration of the reactant is
doubled, the half-life period of a zero order
reaction

The type of isomerism shown by the complex
[CoCl2(en)2] is

The geometry and magnetic behaviour of the
complex [Ni(CO)4] are

Iron carbonyl, Fe(CO)5
is

Which one of the following ions exhibits d-d
transition and paramagnetism as well?

Match the metal ions given in Column I with
the spin magnetic moments of the ions given
in Column II and assign the correct code :

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Consider the change in oxidation state of
bromine corresponding to different emf values
as shown in the given diagram :

Then the species undergoing disproportionation
is :

Which oxide of nitrogen is not a common
pollutant introduced into the atmosphere both
due to natural and human activity?

The correction factor ‘a’ to the ideal gas
equation corresponds to

Given van der Waals’ constant for NH3
, H2,
O2
and CO2
are respectively 4.17, 0.244, 1.36
and 3.59, which one of the following gases is
most easily liquefied?

The compound C7H8
undergoes the following
reactions :

The product ‘C’ is

Hydrocarbon (A) reacts with bromine by
substitution to form an alkyl bromide which by
Wurtz reaction is converted to gaseous
hydrocarbon containing less than four carbon
atoms. (A) is

The solubility of BaSO4
in water is
2.42 × 10–3 g L–1 at 298 K. The value of its
solubility product (Ksp) will be (Given molar
mass of BaSO4
= 233 g mol–1)

Following solutions were prepared by mixing
different volumes of NaOH and HCl of different
concentrations :
A. 60 mL \({M \over {10}}\) HCl + 40 mL \({M \over {10}}\) NaOH
B. 55 mL \({M \over {10}}\) HCl + 45 mL \({M \over {10}}\) NaOH
C. 7...

Nitration of aniline in strong acidic medium
also gives m-nitroaniline because

Which of the following statements is not true
for halogens?

Which one of the following elements is unable
to form MF63– ion?

The correct order of atomic radii in group 13
elements is

Which of the following oxides is most acidic in
nature?

Regarding cross-linked or network polymers,
which of the following statements is incorrect?

Considering Ellingham diagram, which of the
following metals can be used to reduce
alumina?

For the redox reaction,
MnO4–
+ C2O4
2– + H+ \(\to\) Mn2+ + CO2
+ H2O
The correct coefficients of the reactants for
the balanced equation are

The correct order of N-compounds in its
decreasing order of oxidation states is

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

Among CaH2
, BeH2
, BaH2
, the order of ionic
character is

Iron exhibits bcc structure at room temperature.
Above 900°C, it transforms to fcc structure. The
ratio of density of iron at room temperature to
that at 900°C (assuming molar mass and atomic
radii of iron remains constant with temperature)...

In which case is number of molecules of water
maximum?

A mixture of 2.3 g formic acid and 4.5 g oxalic
acid is treated with conc. H2SO4
. The evolved
gaseous mixture is passed through KOH
pellets. Weight (in g) of the remaining product
at STP will be

Which of the following molecules represents
the order of hybridisation sp2
, sp2
, sp, sp from
left to right atoms?

Which of the following carbocations is
expected to be most stable?

Which of the following is correct with respect
to – I effect of the substituents? (R = alkyl)

Which one is a wrong statement?

On which of the following properties does the
coagulating power of an ion depend?

The bond dissociation energies of X2
, Y2
and
XY are in the ratio of 1 : 0.5 : 1. \(\Delta\)H for the
formation of XY is –200 kJ mol–1. The bond
dissociation energy of X2
will be