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CBSE XII
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Chemistry
Chemistry
States of Matter - Solid State
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Chemical Kinetics
Surface Chemistry
Isolation of Elements
p-Block Elements
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Haloalkanes and Haloarenes
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Chemistry in everyday life
Consider the following reaction : $C_2H_5OK +C_2H_5I \to x$Which of the following reagent conuerts ethyl bromide to x?
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 20, 2015
by
meena.p
1
answer
Which among the following is a catalyst for the preparation of Grignard reagent ?
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 20, 2015
by
meena.p
1
answer
Which of the following gives iodoform test ?
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 20, 2015
by
meena.p
1
answer
The major product obtained on treatment of $CH_3CH_2CH(F)CH_3$ with $CH_3 O^{-} /CH_3OH $ is :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 20, 2015
by
meena.p
1
answer
The product obtained on reaction of $C_2H_5Cl$ with hydrogen over palladium carbon is
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 20, 2015
by
meena.p
1
answer
Which of the following is liquid at room temperature ?
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 20, 2015
by
meena.p
1
answer
Tertiary alkyl halider are practically inert to substitution by $Sn_2$ mechanism because of
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 20, 2015
by
meena.p
1
answer
Alkyl halides react with dialkyl copper reagents to give :-
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 20, 2015
by
meena.p
1
answer
At higher temperature iodoform reaction is given by :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Acetone is mixed with bleaching powder to give
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Tert.butyl chloride prefably undergoes hydrolysis by :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
which of the following will not iodoform test ?
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Ethyl orthoformate is formed by heating with sodium ethoxide
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
A mixture of I- chloro butane and 2 - chlorobutane when treated with alcoholic KOH, gives
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Which of the following will not give iodoform test ?
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Ethylene chloride on hydrolysis with aq. KOH gives:
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
n- propyl bromide reacts with ethanolic KOH to
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
$AgNO_3$ does not give precipitate with $CHCl_3$ because
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
A sample of chloroform before using as an anaerthetic is tested by :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Which of the following reactions is an example of nucleophilic substitution reaction ?
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Which is the correct formula of bleaching powder ?
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
The poisonous gas obtained by exposing chloroform to air and sunlight is :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Chloral is :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Ozone is stratosphere is depleted by :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
A crringnard reagent is prepared by the action of magnesium in dry ether on
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
When iodoform is heated with Ag power it forms.
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Chloroform can be obtained from :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Aqueous solution of sodium acetate and sodium proportionate on electrolysis yields :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
No of di-subsitituted isomers of the product of the reaction , $CH_3CH_2CH_3+Br_2$ would be
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Grignard reagent gives alkanes with
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 19, 2015
by
meena.p
1
answer
Which of the following fractions of petroleum has the lowest boiling point ?
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 18, 2015
by
meena.p
1
answer
Reaction of alkanes with halogen is explosive in case of :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 18, 2015
by
meena.p
1
answer
The IUPAC name of neo - pentane is :
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 18, 2015
by
meena.p
1
answer
Correct IUPAC name of alkane obtained in the reaction of 2 chloro propane + Sodium and day either is
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 18, 2015
by
meena.p
1
answer
The re activity of hydrogen atoms attached to carbon atom in an alkane has the order .
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 18, 2015
by
meena.p
1
answer
It is necessary to use in the indoctrination of alkane
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 18, 2015
by
meena.p
1
answer
When criignard reagent $(CH_3MgBr)$ is treated with water , we get
cbse
class12
chemistry
ch-10
haloalkanes-and-alaloarens
asked
Nov 18, 2015
by
meena.p
1
answer
For a complex reaction ___________
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
Mark the incorrect statement :
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
Which of the following statement is not correct for the catalyst ?
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
During decomposition of an activated complex
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
The value of rate constant of a pseudo first order reaction _____________
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
A first order reaction is $50\%$ completed in $1.26 \times 10^{14}\;s$ . how much time would it take for $100 \%$ completion ?
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
Activation energy of a chemical reaction can be determined by __________
cbse
class12
chemistry
ch-4
sec-a
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
In the presence of a catalyst, the heat evolved or absorbed during the reaction
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
The role of a catalyst is to change ______________
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
$T_{50} $ of first order reaction is 10 min storing with $10\; mol^{-1}$ rate after 20 min is
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
According to the law of mass action, rate of a chemical reaction is proportional to
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
Units of rate constants for first and zero order reactions in term of morality M unit are respectively
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
The decomposition of HI on the surface of gold is
cbse
class12
chemistry
ch-4
chemical-kinetics
asked
Sep 24, 2015
by
meena.p
1
answer
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