Physics-
General
Easy
Question
What is the net force on the square coil
moving towards wire
- moving away from wire
moving towards wire
- moving away from wire
moving towards wire
moving away from wire
moving towards wire
moving away from wire
The correct answer is: moving towards wire
Force on side BC and AD are equal but opposite so their net will be zero.
But 
and 
Þ 
, towards the wire.
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obtained. by chlorination of n--butane will be:
obtained. by chlorination of n--butane will be:
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A solid sphere of density h (> 1) times lighter than water is suspended in a water tank by a string tied to its base as shown in fig. If the mass of the sphere is m then the tension in the string is given by
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A given shaped glass tube having uniform cross section is filled with water and is mounted on a rotatable shaft as shown in figure. If the tube is rotated with a constant angular velocity 
then
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Physics-General
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From the adjacent figure, the correct observation is
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A vertical U-tube of uniform inner cross section contains mercury in both sides of its arms. A glycerin (density = 1.3 g/cm3) column of length 10 cm is introduced into one of its arms. Oil of density 0.8 gm/cm3 is poured into the other arm until the upper surfaces of the oil and glycerin are in the same horizontal level. Find the length of the oil column, Density of mercury = 13.6 g/cm3
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Chemistry-
Acetylene on treatment with dilute.
having 
gives:
Acetylene on treatment with dilute. having gives:
Chemistry-General
Chemistry-
In the given reaction,
X will be:
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Chemistry-General
Chemistry-
(isomeric products), 
(isomeric products) Give the number of N and M:
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Chemistry-General
Chemistry-
Free radical halogenation takes place in tile presence of light or at high temperature (above 500
C). Formation of halogen free radical intermediate takes place in first step called chain initiation •.
This reaction is mainly given by those compounds which have at least one hydrogen atom present at sp3 -hybrid carbon. Reactivity of 
-hybrid carbon depends on' the reactivity of reaction intermediate.
The relative rate of formation of alkyl radicals by a chlorine radical is:
Relative amount =
Relative amount = Number of hydrogen atoms on the respective carbon x relative reactivity. NBS (N-Bromo succinimide) is used for bromination at allylic and benzylic carbon, whereas 
gives bromination at benzylic, allylic and alkyl carbons Which one of the following compounds will react with NBS?
Free radical halogenation takes place in tile presence of light or at high temperature (above 500C). Formation of halogen free radical intermediate takes place in first step called chain initiation •.
This reaction is mainly given by those compounds which have at least one hydrogen atom present at sp3 -hybrid carbon. Reactivity of -hybrid carbon depends on' the reactivity of reaction intermediate.
The relative rate of formation of alkyl radicals by a chlorine radical is:
Relative amount =
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Chemistry-General
Chemistry-
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or 1lIlim0lecular: 
Bimolecular reaction takes place in single step, involving transition state intermediate. In 
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Which among the following will give reaction?
I) 
II) 
III) 
IV) 
Nucleophilic substitution reaction" is given by those compounds which have nucleophilic. groups as leaving groups. The weaker the basicity of a group of the substrate, the better is its leaving ability. In nucleophilic substitution reactions, the basicity of leaving group should be less than the incoming nucleophilic group. Nucleophilic substitution reaction at sp3-hybridised carbon is either bimolecular or 1lIlim0lecular: Bimolecular reaction takes place in single step, involving transition state intermediate. In reaction, inversion in configuration takes place. In case of optically active alkyl halides, the inversion in configuration is called Walden "inversion. reaction is preferred if the compound has less steric hindrance. " Unimolecular ( ) reaction" involves two steps and" carbonium ion intermediate. Optically active" substrates give racemic mixture in these" reactions.
Which among the following will give reaction?
I)
II)
III)
IV)
Chemistry-General
Chemistry-
Identify the correct order of reactivity in electrophilic substitution reactions of the following compounds:
I) 
II) 
III) 
IV) 
Identify the correct order of reactivity in electrophilic substitution reactions of the following compounds:
I)
II)
III)
IV)
Chemistry-General
Chemistry-
Dehydrobromination (HBr-) of the following in increasing order will be:
I) 
II) 
III) 
Dehydrobromination (HBr-) of the following in increasing order will be:
I)
II)
III)
Chemistry-General
