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 : 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 : 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 : The vlaue of `""^(n+1)C_(r)`= ___________
Last Answer : The vlaue of `""^(n+1)C_(r)`= ___________
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 : 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 : Based onthe Clos criteria, if N = 200, then the minimum number of crosspoints isgreater thanor equal to _______. A) 15,200 B) 18,000 C) 42,000 D) 20,000
Last Answer : 15,200
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 : Compound (A) `C_(12)H_(20)` discharges the colour of `Br_(2)-H_(2)O` and cold `KMnO_(4)` . On reduction with `H_(2)`/Pt it gives compound (B) `C_(12)H
Last Answer : Compound (A) `C_(12)H_(20)` discharges the colour of `Br_(2)-H_(2)O` and cold `KMnO_(4)` . On ... Find structure of A : A. B. C. D. None of these
Description : The number of coordination isomers possible for `[Fe(NH_(3))_(6)]^(3+)[Cr(C_(2)O_(4))_(3)]^(3-)` is __________
Last Answer : The number of coordination isomers possible for `[Fe(NH_(3))_(6)]^(3+)[Cr(C_(2)O_(4))_(3)]^(3-)` is __________
Description : The `C_(4)` plants are photosynthesis more efficient then `C_(3)` plant because
Last Answer : The `C_(4)` plants are photosynthesis more efficient then `C_(3)` plant because ... photorespiration is trapped and recycled through PEP carboxylase
Description : `C_(6)H_(5)-CH_(2)-I overset(NaN_(3))underset(Delta)rarr` Products Reaction is assumed to involve nitrene as intermediate, then various possible produ
Last Answer : `C_(6)H_(5)-CH_(2)-I overset(NaN_(3))underset(Delta)rarr` Products Reaction is assumed to involve nitrene as ... (2)` C. `C_(6)H_(5)CN=NH` D.
Description : Ethyl alcohol forms X `CaCl_(2)^(3). C_(2)H_(5)OH` when `C_(2)H_(5)OH` reacts with respective anhydrous salts. Then
Last Answer : Ethyl alcohol forms X `CaCl_(2)^(3). C_(2)H_(5)OH` when `C_(2)H_(5)OH` reacts with respective anhydrous salts. Then ... = 4` D. `X = 4, Y = 4, Z = 4`
Description : The observed N- value from a standard penetration test conducted in saturated sandy strata is 30; the N- value corrected for dilatancy may be taken as : (b) 15 (a) 20 (c) 23 (d) 39
Last Answer : (c) 23
Description : What is the shear stress acting on the outer surface of a hollow shaft subjected to a torque of 100 Nm?(The inner and outer diameter of the shaft is 15 mm and 30 mm respectively.) a. 50.26 N/mm2 b. 40.24 N/mm2 c. 20.120 N/mm2 d. 8.74 N/mm2
Last Answer : c. 20.120 N/mm2
Description : Three pumps, M, N and O are opened to fill a tank such that M and N can fill the tank alone in 18 min. and 23 min. respectively and O can empty it in 15 min. After 3 minutes the emptying pipe is closed. In how many minutes the tank will be full in this way? A) 20 B) 25 C) 18 D) 12
Last Answer : D Let the tank full in x minutes, then M and N opened for x minutes and O for 3 minutes. (1/18 + 1/23)*x – (1/15)*3 = 1 (23+18/414)X=1+1/5 Solve, x = 12
Description : Smoke point of a test sample of kerosene is found to be 15 mm. On removal of __________ from it, the smoke point rises to 25 mm. (A) n-paraffins (B) Olefins (C) Aromatics (D) None of these
Last Answer : (C) Aromatics
Description : Under Liberalised Remittance Scheme, PAN card need not be insisted upon for remittance made towards permissible current account transactions up to __________ A. USD 25,000 B. USD 20,000 C. USD 15,000 D. USD 10,000 E. None of the Above
Last Answer : A. USD 25,000 Explanation: PAN card need not be insisted upon for remittance made towards permissible current account transactions up to USD 25,000 per financial year.
Description : The yield of straight run LPG from crude oil is about __________ weight percent. (A) 20-25 (B) 1-1.5 (C) 10-15 (D) 0.1-0.2
Last Answer : (B) 1-1.5
Description : Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms. (A) 0.1 to 0.5 (B) 1.5 to 4.5 (C) 7.5 to 12.5 (D) 15-20
Last Answer : (B) 1.5 to 4.5
Description : Trommels are revolving screens which normally operate in the range of __________ rpm. (A) 1 - 2 (B) 15 - 20 (C) 40 - 50 (D) 60 - 75
Last Answer : (B) 15 - 20
Description : The optimum moisture content in solids to be crushed/ground ranges from __________ percent. (A) 3 to 4 (B) 8 to 10 (C) 10 to 15 (D) 15 to 20
Last Answer : (A) 3 to 4
Description : Calorific value of furnace oil is about __________ Kcal/kg. (A) 10,000 (B) 15,000 (C) 5,000 (D) 20,000
Last Answer : (A) 10,000
Description : Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent. (A) 3 & 10 (B) 10 & 3 (C) 10 & 20 (D) 15 & 8
Last Answer : (B) 10 & 3
Description : A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the 'carpet loss'. The carpet loss may be of the order of __________ cms. (A) 1 to 2 (B) 3 to 4 (C) 5 to 15 (D) 20 to 40
Last Answer : (C) 5 to 15
Description : P2O5 content in triple superphosphate is about __________ percent. (A) 42-50 (B) 15-20 (C) 85-90 (D) 70-75
Last Answer : (A) 42-50
Description : P2O5 content in superphosphate is about __________ percent. (A) 30-35 (B) 15-20 (C) 65-70 (D) 85-90
Last Answer : (B) 15-20
Description : Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools). (A) 1-2 (B) 5-10 (C) 15-20 (D) 25-30
Last Answer : (B) 5-10
Description : Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m2 /hr. (A) 0.1 to 1 (B) 3 to 6 (C) 10 to 15 (D) 15 to 20
Last Answer : (B) 3 to 6
Description : In sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks. (A) 1 to 2 (B) 4 to 5 (C) 9 to 10 (D) 15 to 20
Last Answer : (B) 4 to 5
Description : . Sucrose content in the raw juice extracted from sugar cane is about __________ percent (B) 15 - 20 (A) 1 - 2285 (C) 50 - 60 (D) 80 - 85
Description : Sugar content in sugarcane on cane basis is about __________ percent by weight. (A) 1 to 5 (B) 5 to 10 (C) 15 to 20 (D) 20 to 30
Last Answer : (B) 5 to 10
Description : The Al2O3 content of cryolite in Hall-Heroult cell is maintained between __________ percent. (A) 2-5 (B) 18-20 (C) 12-15 (D) 6-12
Last Answer : (A) 2-5
Description : The standard and labelling scheme is invoked for 20 equipment from which __________ number of equipment are mandatory. A. 30. B. 20. C. 10. D. 15.
Last Answer : 20
Description : In Go-Back-N ARQ, if 5 is the number of bits for thesequencenumber, then the maximum size of the receive window mustbe _____ A) 15 B) 16 C) 31 D) 1
Last Answer : 1
Description : In Go-Back-N ARQ, if 5 is the number of bits for thesequencenumber, then the maximum size of the send window must be _____ A) 15 B) 16 C) 31 D) 1
Last Answer : 31