A mixture of 2.3 g formic acid and 4.5 g
oxalic acid is treated with conc. ``H_2SO_4``.
The evolved gaseous mixture is passed through
KOH pellets. Weight (in g) of the remaining
product at STP will be
(1) 1.4
(2) 3.0
(3) 2.8
(4) 4.4

Nitration of aniline in strong acidic medium also
gives m-nitroaniline because
(1) In spite of substituents nitro group always
goes to only m-position.
(2) In electrophilic substitution reactions amino
group is meta directive.
(3) In absence of substituents nitro group always
goes to m-position
(4) In acidic (strong) medium aniline is present as
anilinium ion.

Which of the following oxides is most acidic in
nature?
(1) MgO
(2) BeO
(3) BaO
(4) CaO

The difference between amylose and amylopectin is
(1) Amylopectin have 1 ``\rightarrow``4 ``\alpha``-linkage and 1 ``\rightarrow`` 6
``\alpha``-linkage
(2) Amylose have 1 ``\rightarrow`` 4 ``\alpha``-linkage and 1 ``\rightarrow`` 6
``\alpha``-linkage
(3) Amylopectin have 1 ``\rightarrow`` 4 ``\alpha``-linkage and 1 ``\rightarrow`` 6
``\alpha``-linkage.
(4) Amylose is made up of glucose and galactose.

Regarding cross-linked or network polymers, which
of the following statements is incorrect?
(1) They contain covalent bonds between various
linear polymer chains.
(2) They are formed from bi-and tri-functional
monomers.
(3) Examples are bakelite and melamine.
(4) They contain strong covalent bonds in their
polymer chains.

In the reaction

the electrophile involved is
(1) dichloromethyl cation ``\ce{(CHCl2)^\oplus}``
(2) formyl cation ``\ce{(CHO)^\oplus}``
(3) dichloromethyl anion ``\ce{(CHCl2)^\ominus}``
(4)dichlorocarbene ``\ce{(:CCl2)}``

Carboxylic acid have higher boiling points than
aldehydes, ketones and even alcohols of
comparable molecular mass. It is due to their
(1) formation of intramolecular H-bonding
(2) formation of carboxylate ion
(3) more extensive association of carboxylic acid via
van der Waals force of attraction
(4) formation of intermolecular H-bonding.

Compound A, ``\ce{(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
(1)
(2)
(3)
(4)

The correct difference between first- and
second-order reaction is that
(1) the rate of a first-order reaction does not depend
on reactant concentration; the rate of a second-
order reaction does depend on reactant
concentrations.
(2) the half-life of a first-order reaction does not
depend on ``[A]_0``; the half-life of a second-order
reaction does depend on ``[A]_0``
(3) a first-order reaction can be catalyzed;
a second-order reaction cannot be catalyzed.
(4) the rate of a first-order reaction does depend
on reactant concentrations; the rate of a
second-order reaction does not depend on
reactant concentrations

Among ``\ce{CaH2}``, ``\ce{BeH2}``, ``\ce{BaH2}``, the order of ionic
character is
(1)``\ce BeH2 < CaH2 < BaH2``
(2) ``\ce CaH2 < BeH2 < BaH2``
(3) ``\ce BeH2 < BaH2 < CaH2``
(4) ``\ce BaH2 < BeH2 < CaH2``

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

Then the species undergoing disproportionation is:-
(1) ``\ce{BrO3-}``
(2) ``\ce{BrO4-}``
(3) ``\ce{Br2}``
(4) HBrO

In which case is the number of molecules of
water maximum?
(1) 18 mL of water
(2) 0.18 g of water
(3) 0.00224 L of water vapours at 1 atm and 273 K
(4) ``10^{-3}`` mol of water

Magnesium reacts with an element (X) to form an
ionic compound. If the ground state electronic
configuration of (X) is ``1s^2`` ``2s^2`` ``2p^3``, the simplest
formula for this compound is
(1) ``\ce{Mg2X3}`` (2) ``\ce{MgX2}``
(3)``\ce{Mg2X}`` (4)``\ce{Mg3X2}``

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) is
(1)``\frac{\sqrt3}{\sqrt2}``
(2)``\frac{4\sqrt3}{3\sqrt2}``
(3)``\frac{3\sqrt3}{4\sqrt2}``
(4)``\frac{1}{2}``