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chemistry
What will be the most probable product when compound ‘X’ is treated with two equivalents of NaOH,
What will be the most probable product when compound ‘X’ is treated with two equivalents of NaOH,
chemistryGeneral
chemistry
Aniline reacts with mixed acid (conc. HNO_{3} and conc. H_{2}SO_{4} ) at 288 K to give P (51%), Q (47%) and R (51%), Q(47%) and R (2%). The major product(s) of the following reaction sequence is/are
Aniline reacts with mixed acid (conc. HNO_{3} and conc. H_{2}SO_{4} ) at 288 K to give P (51%), Q (47%) and R (51%), Q(47%) and R (2%). The major product(s) of the following reaction sequence is/are
chemistryGeneral
chemistry
The major product of the following reaction is
The major product of the following reaction is
chemistryGeneral
chemistry
In the following reaction sequences V and W are respectively :
In the following reaction sequences V and W are respectively :
chemistryGeneral
chemistry
GivenKcal Kcal Kcal the heat of formation of methane in Kcal will be
GivenKcal Kcal Kcal the heat of formation of methane in Kcal will be
chemistryGeneral
maths
A set of (2n + 1) elements is given. The no. of subsets of the set which contain atmost n elements 
A set of (2n + 1) elements is given. The no. of subsets of the set which contain atmost n elements 
mathsGeneral
chemistry
under Hofmann conditions will give :
under Hofmann conditions will give :
chemistryGeneral
chemistry
Which step is rate determining ste
Which step is rate determining ste
chemistryGeneral
chemistry
Which reagent (X) is used to convert I to II
Which reagent (X) is used to convert I to II
chemistryGeneral
chemistry
An organic compound A upon reacting with NH_{3} gives B. On heating B gives C. C in presence of KOH reacts with Br_{2} to given CH_{3}CH_{2}NH_{2} . A is :
An organic compound A upon reacting with NH_{3} gives B. On heating B gives C. C in presence of KOH reacts with Br_{2} to given CH_{3}CH_{2}NH_{2} . A is :
chemistryGeneral
Maths
If r, s, t are prime numbers and p, q are the positive integers such that the LCM of p, q is , then the number of ordered pair (p, q) is
Be careful about selecting the r s and t for this particular problem. Because number ways for each selection of r, s and t there are 3 cases. Because there are two values given
p, q . Hence to calculate the total number of ways is to multiply the number of ways for r, number of ways for s and number of ways for t. So, in this way to solve this particular type of problem.
If r, s, t are prime numbers and p, q are the positive integers such that the LCM of p, q is , then the number of ordered pair (p, q) is
MathsGeneral
Be careful about selecting the r s and t for this particular problem. Because number ways for each selection of r, s and t there are 3 cases. Because there are two values given
p, q . Hence to calculate the total number of ways is to multiply the number of ways for r, number of ways for s and number of ways for t. So, in this way to solve this particular type of problem.
Maths
A rectangle has sides of (2m – 1) & (2n – 1) units as shown in the figure composed of squares having edge length one unit then no. of rectangles which have odd unit length –
A rectangle has sides of (2m – 1) & (2n – 1) units as shown in the figure composed of squares having edge length one unit then no. of rectangles which have odd unit length –
MathsGeneral
chemistry
Observe the esterification mechanisms for primary and tertiary alcohols
Type1:
Type2:
Mechanism:
In the above reaction (P) and (Q) are respectively :
Observe the esterification mechanisms for primary and tertiary alcohols
Type1:
Type2:
Mechanism:
In the above reaction (P) and (Q) are respectively :
chemistryGeneral
physics
Two identical samples of a gas are allowed to expand (i) isothermally (ii) adiabatically work done is
Two identical samples of a gas are allowed to expand (i) isothermally (ii) adiabatically work done is
physicsGeneral
physics
A thermodynamic system is taken from state A to B along ACB and is brought back to Along BDA as Shown in the P$\to $V diagram. The net work done during the complete cycle is given by the area.
A thermodynamic system is taken from state A to B along ACB and is brought back to Along BDA as Shown in the P$\to $V diagram. The net work done during the complete cycle is given by the area.
physicsGeneral