Description : `sum_(r=1)^(30) r (""^(30)C_(r))/(""^(30)C_(r-1))=` ___________
Last Answer : `sum_(r=1)^(30) r (""^(30)C_(r))/(""^(30)C_(r-1))=` ___________ A. 930 B. 465 C. 310 D. 630
Description : vlaue of 1963 schwinn high sierra mountain bike excellent condition
Last Answer : Need Answer
Description : A company is selling shares at Rs.120 each. Each has a par vlaue of Rs.100. The premium percentage is _______.
Last Answer : A company is selling shares at Rs.120 each. Each has a par vlaue of Rs.100. The premium percentage is _______.
Description : If `""^(n)C_(r)=1 and n=6,` then what may be the value (s) of r be?
Last Answer : If `""^(n)C_(r)=1 and n=6,` then what may be the value (s) of r be?
Description : `""^(7)C_(2)` = ___________
Last Answer : `""^(7)C_(2)` = ___________
Description : `(n-r)!`= ___________
Last Answer : `(n-r)!`= ___________
Description : If `""^(12)C_(r)(4)^(12-r)(x)^(12-3r)` is a contant term in an expansion, then r = __________
Last Answer : If `""^(12)C_(r)(4)^(12-r)(x)^(12-3r)` is a contant term in an expansion, then r = __________
Description : For the given reaction , `A(g) rarr 2B(g) , Delta_(r)H= 30 kJ//"mole" Delta_(r)S = 150 J//mol` at `300 K` If `C_(P,A) = 20 J//K mol` and `C_(P,B) = 20
Last Answer : For the given reaction , `A(g) rarr 2B(g) , Delta_(r)H= 30 kJ//"mole" Delta_(r)S = 150 J//mol` at ... G` is negative D. At `T = 200, Delta G` is zero
Description : Compounds P and R upon ozonolysis produce Q and S, respectively. The molecular formula of Q and S is `C_(8)H_(8)O`. Q undergoes cannizzaro reactions b
Last Answer : Compounds P and R upon ozonolysis produce Q and S, respectively. The molecular formula of Q and S is `C_(8) ... R , respectively is (are) A. B. C. D.
Description : Assertion: (A) Ethers are relatively inert when compared to `C_(2)H_(5)OH` Reason (R): The hybridization of C and O in `CH_(3)-O-CH_(3) is SP^(3)`
Last Answer : Assertion: (A) Ethers are relatively inert when compared to `C_(2)H_(5)OH` Reason (R): The hybridization of ... R is false D. A is false but R is true
Description : If `""^(n)C_(3)=""^(n)C_(15)`, then `""^(20)C_(n)` is __________
Last Answer : If `""^(n)C_(3)=""^(n)C_(15)`, then `""^(20)C_(n)` is __________
Description : Given that for a reaction of nth order, the integrated rate equation is: `K=1/(t(n-1))[1/C^(n-1)-1/C_(0)^(n-1)]`, where `C` and `C_(0)` are the concen
Last Answer : Given that for a reaction of nth order, the integrated rate equation is: `K=1/(t(n-1))[1/C^(n-1)-1/C_(0)^(n-1)] ... `t_(3//4)=t_(1//2) [2^((n-1))+1]`
Description : Consider the given compounds : (a) `CH_(3)-CH_(2)-NH_(2)` (b) `CH_(3)-CH=NH` (c ) `CH_(3)-C=N` (d) `C_(2)H_(5)-NH-C_(2)H_(5)` Arrange basicity of thes
Last Answer : Consider the given compounds : (a) `CH_(3)-CH_(2)-NH_(2)` (b) `CH_(3)-CH=NH` (c ) `CH_(3)-C=N` (d) `C_(2 ... `a gt d gt b gt c` D. `d gt a gt c gt b`
Description : How many amines are possible with the molecular formula `C_(4)H_(11)N` (structural isomers only) :-
Last Answer : How many amines are possible with the molecular formula `C_(4)H_(11)N` (structural isomers only) :- A. 6 B. 7 C. 8 D. 9
Description : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolve
Last Answer : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts ... . 1-phenylethanamine C. 1-cyclohexylethanamine D. N-ethylaniline
Description : A nitrile X is treated with `LiAIH_(4)` to obtain compound `Y(C_(2)H_(9)N)` reacts with benzensulfonyl chloride to give `Y(C_(13)H_(13)NO_(2)S)` which
Last Answer : A nitrile X is treated with `LiAIH_(4)` to obtain compound `Y(C_(2)H_(9)N)` reacts with benzensulfonyl chloride ... (3)CH_2COO^(-))(CH_(3)NH_(3)^(+))`
Description : Three isometic compounds M,N and P `(C_(5)H_(10)O)` give the following tests (i) M and P react with sodium bisulfite to form an adduct J (ii) N Comsum
Last Answer : Three isometic compounds M,N and P `(C_(5)H_(10)O)` give the following tests (i) M and P react with ... M,N and P, respectively are A. B. C. D.
Description : Which conformational state of n-butane lies in higher energy state when rotated along `C_(2)-C_(3)` bond?
Last Answer : Which conformational state of n-butane lies in higher energy state when rotated along `C_(2)-C_(3)` bond?
Description : The `S_(N^(1))` reactivity of the following halides will be in the order: (i) `(CH_(3))_(3)C-Br` (ii) `(C_(6)H_(5))CHBr` (iii) `(C_(6)H_(5))_(2)C(CH_(
Last Answer : The `S_(N^(1))` reactivity of the following halides will be in the order: (i) `(CH_(3))_(3)C-Br` (ii) `(C_ ... D. (iii) gt (ii) gt (i) gt (iv) gt (v)
Description : Optically active amine having molecular formula `C_(5)H_(13)N` on reaction with `NaNO_(2)+HCI` produces, `3^(@)` optically inative alcohol. Find out s
Last Answer : Optically active amine having molecular formula `C_(5)H_(13)N` on reaction with `NaNO_(2)+HCI` produces, ` ... out structures of amines: A. B. C. D.
Description : The end product (B) of the reaction sequence: `C_(2)H_(5)-underset(H)underset(|)(N)-CH_(3) overset(Ph-overset(O)overset(||)(C)-Cl)underset(NaOH)rarrA
Last Answer : The end product (B) of the reaction sequence: `C_(2)H_(5)-underset(H)underset(|)(N)-CH_(3) overset(Ph-overset ... )underset(H_(2)O)rarr B` A. B. C. D.
Description : Compound `[X] C_(4)H_(11)N` reacts with p-toluence sulphonyl chloride in aqueous `NaOH` to give a solid. The compound [X] is:
Last Answer : Compound `[X] C_(4)H_(11)N` reacts with p-toluence sulphonyl chloride in aqueous `NaOH` to give a solid. ... 2)-underset(CH_(3))underset(|)(N)-CH_(3)`
Description : If reading the AC voltage from the line lead of a 440 VAC controller the range switch illustrated should be set to ___________. EL-0047 A. 1,000 V B. 250 V C. R X 10,000 D. Unable to safely read with this meter.
Last Answer : Answer: A
Description : If reading the AC voltage from a typical wall outlet, the range switch of the device illustrated should be set to ___________. EL-0047 A. 1,000 V B. 250 V C. R X 10,000 D. 10 ma/amps
Last Answer : Answer: B
Description : The sum of the first n even natural numbers is ___________
Last Answer : The sum of the first n even natural numbers is ___________
Description : In the expansion of various power of `(x+y)^(n)` if the expansion contains 49 times, then it is the expansion of ___________
Last Answer : In the expansion of various power of `(x+y)^(n)` if the expansion contains 49 times, then it is the expansion of ___________
Description : The traveling salesman problem involves n cities with paths connecting the cities. The time taken for traversing through all the cities, without knowing in advance the length of a minimum tour, is ___________ a) O(n) b) O(n2) c) O(n!) d) O(n/2)
Last Answer : c) O(n!)
Description : The renewal of NO3 involves release of ___________ from organic fraction of the soil and its rapid nitrification: a. NO2 b. NH4 c. N d. NO
Last Answer : NH4
Description : A(n) ___________ is a name, term, sign, symbol or design, or a combination of these that identifies the maker or seller of a product or service 1. product feature 2. sponsorship 3. brand 4. logo 5. none of these
Last Answer : brand
Description : In Go-Back-N window, when the timer of the packet times out, several packets have to be resent even some may have arrived safe. Whereas in Selective Repeat window, the sender resends ___________ A ... lost B. Only those packets which are lost or corrupted C. Packet from starting D. All the packets
Last Answer : B. Only those packets which are lost or corrupted