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Chemistry
List of top Chemistry Questions
Most hazardous metal pollutant of automobile exhausts is
Chemistry
Environmental Chemistry
Taj may be destroyed by
Chemistry
Environmental Chemistry
Which of the following is/are the main agents of soil erosion?
Chemistry
Environmental Chemistry
Classical Smog is also known as
Chemistry
Environmental Chemistry
Ozone layer of upper atmosphere is being destroyed by
Chemistry
Environmental Chemistry
Increased asthmatic attacks in certain seasons are related to
Chemistry
Environmental Chemistry
Which one of the following dissolves more rapidly in blood haemoglobin than oxygen ?
Chemistry
Environmental Chemistry
A type of zeolite used to convert alcohols directly into gasoline is
Chemistry
p -Block Elements
A translucent white waxy solid
$(A)$
reacts with excess of chlorine to give a yellowish white powder
$(B)$
.
$(B)$
reacts with organic compounds containing
$-OH$
group converting them into chloro derivatives.
$(B)$
on hydrolysis gives
$(C)$
and is finally converted to phosphoric acid.
$(A)$
,
$(B)$
and
$(C)$
are
Chemistry
p -Block Elements
A system has internal energy equal to
$E_1$
, 450 J of heat is taken out of it and 600 J of work is done on it. The final energy of the system will be
Chemistry
Thermodynamics
$A$
system absorbs
$50 \,kj$
heat and does
$20\, kj$
of work. What is the net change in the internal energy of the system?
Chemistry
Thermodynamics
A suspension of
$Ca(OH)_2$
in water is called
Chemistry
GROUP 1 ELEMENTS
A standard hydrogen electrode has a zero potential because
Chemistry
Electrochemistry
A solution of a compound
$X$
in dilute
$HCl$
on treatment with a solution of
$BaCl_2$
gives a white precipitate of a compound
$Y$
which is insoluble in cone.
$HNO_3$
and conc.
$HCl$
. Compound
$X$
imparts golden yellow colour to the flame. $\underset{\text{(imparts golden yellow colour)}}{ {X (Solution \,in \,dilute HCl) }}
$ $
+\, {BaCl2 -> }
$$
\underset{\text{Whit ppt}}{ {Y}}
$ $
{->[\text{Conc}. HNO_3][\text{Conc}.HCl] Insoluble}$ What are compounds
$X$
and
$Y$
?
Chemistry
GROUP 1 ELEMENTS
A solution of 10 ml
$\frac{M}{10} {FeSO_4}$
was titrated with
$ {KMnO_4}$
solution in acidic medium. The amount of
$ {KMnO_4}$
used will be :
Chemistry
Redox reactions
A solid
$X^{+} Y^{-}$
has a bee structure. If the distance of closest approach between the two atoms is 173 pm, the edge length of the cell is
Chemistry
The solid state
A solution containing 0.319 g of
$CrCl_3?6H_2O$
was passed through a certain exchange resin and acid coming of cation exchange resin required 28.5 mL of 0.125 M NaOH. The correct formula of complex is (mol. wt. of complex = 266.7)
Chemistry
coordination compounds
A solid is made of two elements
$X$
and
$Z$
. The atoms
$Z$
are in
$ccp$
arrangement while atoms
$X$
occupy all the tetrahedral sites. What is the formula of the compound ?
Chemistry
The solid state
A sample of
$O_2$
gas is collected over water at
$23 ^{\circ}C$
at a barometric pressure of
$751\, mm\, Hg$
(vapour pressure of water at
$23^{\circ}C$
is
$21\, mm\, Hg$
).The partial pressure of
$O_2$
gas in the sample collected is
Chemistry
States of matter
A real gas obeying van der Waal equation will resemble ideal gas if the
Chemistry
States of matter
A primary alkyl halide would prefer to undergo
Chemistry
Haloalkanes and Haloarenes
A primary alcohol,
$C_3H_8O(A)$
on heating with sulphuric acid undergo dehydration to give an alkene,
$B$
.
$B$
when reacted with
$HCl$
gave
$C$
, which on treatment with aqueous
$KOH$
gives compound
$D(C_3H_8O)$
.
$A$
and
$D$
are
Chemistry
Alcohols, Phenols and Ethers
A positive catalyst only
Chemistry
Surface Chemistry
A person living in Shimla observed that cooking food without using pressure cooker takes more time. The reason for this observation is that at high altitude
Chemistry
States of matter
A pair of compounds and a test name is given in each option. Find the option where the test given cannot be used to differentiate the pair of compounds.
Chemistry
Amines
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