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Tue Apr 22, 2014 10:06 pm  

Ans: the

Tue Apr 22, 2014 10:05 pm  

Ans: java.lang.Exception: The input exceeds the limit of 3072 characters of length.

Tue Apr 22, 2014 10:01 pm  

Ans: C o n s i d e r space t h e space f o l l o w i n g space s e t space A equals open curly brackets x : x equals 2 n comma space n element of N comma n less than 6 close curly brackets : F o r space n equals 1 comma 2 comma 3 comma 4 comma 5 comma space w e space h a v e 2 n equals 2 comma 4 comma 6 comma 8 comma 10 T h u s comma space A equals open curly brackets 2 comma 4 comma 6 comma 8 comma 10 close curly brackets N o w space l e t space u s space w r i t e space t h e space s e t space open curly brackets 2 comma 4 comma 8 comma 16 comma 32 close curly brackets space i n space s e t space b u i l d e r space f o r m : L e t space B space b e space t h e space s e t space B equals space open curly brackets 2 comma 4 comma 8 comma 16 comma 32 close curly brackets S i n c e space 2 to the power of 1 equals 2 comma 2 squared equals 4 2 cubed equals 8 2 to the power of 4 equals 16 2 to the power of 5 equals 32 comma w e space c a n space w r i t e comma space t h e space s e t space B space a s comma B equals open curly brackets x : x equals 2 to the power of n comma n element of N comma n less than 6 close curly brackets

Tue Apr 22, 2014 9:17 pm  

Ans: Consider the following table:   java.lang.Exception: The input exceeds the limit of 3072 characters of length. Thus the relation is an equivalence relation if it satisfies the conditions, reflexive, symmetry, and transitive.    

Tue Apr 22, 2014 8:11 pm  

Ans: Let the original length of wire be L, cross sectional area be A Then resistance, Now length of wire L in increased 4 times by pulling i.e L'=4L .It means its cross sectional area will become A/4 i.e A'=A/4 Then new resistance will be

Tue Apr 22, 2014 8:11 pm  

Ans: Let the original length of wire be L, cross sectional area be A Then resistance, Now length of wire L in increased 4 times by pulling i.e L'=4L .It means its cross sectional area will become A/4 i.e A'=A/4 Then new resistance will be

Tue Apr 22, 2014 5:12 pm  

Ans: The ground state electronic configuration of silver is  is [Kr]4d105s1.

Tue Apr 22, 2014 3:14 pm  

Ans: Electric power is the rate at which electrical energy is produced or consumed in an electric circuit.   P = VI = I 2 R = V 2 /R   Hence, power is inversely proportional to the resistance. Therefore, higher is  the power rating smaller is the resistance.   Example:        

Tue Apr 22, 2014 2:11 pm  

Ans: Anisotropic solids have different arrangement of particles in all directions. It is the property of being directionally dependent, as opposed to isotropy. Anisotropic solids are those solids, in which due to different arrangement of particles in different directions, the values of physical properties such as refractive index, conductivity, thermal expansion etc. are different in different directions. It is characteristics of crystalline solids.

Tue Apr 22, 2014 11:12 am  

Ans: Dear Ram Benzoic acid is a weak acid (pKa ~ 4.2) will dissolve in sodium bicarbonate which is  a weak base (pKa ~ 6.4). There is no ppt because the products of an acid/base reaction is an ionic salt.   Regards

Topperlearning Team.

Tue Apr 22, 2014 11:10 am  

Ans: Aqueous KOH results into substitution reaction. Cl 3 C−CH 2 −CH 3 +3KOH(aq)→(OH) 3 C−CH 2 −CH 3 +3KCl It may be noted that more than one OH group cannot be present on the same carbon atom. In such a case, the compound will be extremely unstable and will readily lose a water molecule to form more stable propionic acid. (OH) 3 C−CH 2 −CH 3 ⟶HOOC−CH 2 −CH 3 +H 2 O Thus, propionic acid is the major product along with water molecule. Hence, the corrrect option is propionic acid (option 2).

Tue Apr 22, 2014 11:09 am  

Ans: Aqueous KOH results into substitution reaction. Cl 3 C−CH 2 −CH 3 +3KOH(aq)→(OH) 3 C−CH 2 −CH 3 +3KCl It may be noted that more than one OH group cannot be present on the same carbon atom. In such a case, the compound will be extremely unstable and will readily lose a water molecule to form more stable propionic acid. (OH) 3 C−CH 2 −CH 3 ⟶HOOC−CH 2 −CH 3 +H 2 O Thus, propionic acid is the major product along with water molecule. Thus the major product is propionic acid (option 2)

Tue Apr 22, 2014 11:04 am  

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Tue Apr 22, 2014 11:01 am  

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Tue Apr 22, 2014 10:59 am  

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Tue Apr 22, 2014 10:58 am  

Ans: Answer --Option 1  

Tue Apr 22, 2014 10:57 am  

Ans: java.lang.Exception: The input exceeds the limit of 3072 characters of length.

Mon Apr 21, 2014 8:50 pm  

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Mon Apr 21, 2014 8:48 pm  

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Mon Apr 21, 2014 8:45 pm  

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