Description : From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask. (a) CH4, H2, NH3 and water vapor at 800°C (b) CH3, H2, NH4 and water vapor at 800°C (c) CH4, H2, NH3 and water vapor at 600°C (d) CH3, H2, NH3 and water vapor at 600°C
Last Answer : a) CH4, H2, NH3 and water vapor at 800°C
Description : `CH_(3)NH_(2)+CHCl_(3)+KOH to` Nitrogen containing compound `+KCl + H_(2)O`.
Last Answer : `CH_(3)NH_(2)+CHCl_(3)+KOH to` Nitrogen containing compound `+KCl + H_(2)O`. A. `CH_(3)-C-=N` B. `CH_(3)-NH- ... -= C^(+)` D. `CH_(3)-N^(+)-=C^(-)`
Description : (i) `NH_(3)` (ii) `N_(2)H_(4)` (iii) `HN_(3)` (iv) `PH_(3)` (v) `H_(2)S` (vi) `AsH_(3)` (vii) `SbH_(3)` (viii) `H_(2)Se` (ix) `H_(2)Te` Number of mole
Last Answer : (i) `NH_(3)` (ii) `N_(2)H_(4)` (iii) `HN_(3)` (iv) `PH_(3)` (v) `H_(2) ... lone pair of electrons on the central atom is present in pure s-orbital
Description : In the experiment of Stanely Miller the temp. of water vapour was :
Last Answer : In the experiment of Stanely Miller the temp. of water vapour was : A. `1200^(@)C` B. `1000^(@)C` C. `800^(@)C` D. `1500^(@)C`
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 : What is the product when `C_(6)H_(5)CH_(2)NH_(2)` reacts with `HNO_(3)`?
Last Answer : What is the product when `C_(6)H_(5)CH_(2)NH_(2)` reacts with `HNO_(3)`?
Description : An organic compound A,`C_(5)H_(8)O` reacts with `H_(2)O, NH_(3)` and `CH_(3)COOH` as described below A is
Last Answer : An organic compound A,`C_(5)H_(8)O` reacts with `H_(2)O, NH_(3)` and `CH_(3)COOH` as described ... 2))underset(||)(C)-underset(H)underset(|)(C)=O`
Description : In the given reaction which one of the following statement is correct - `C_(6)H_(5)-underset(CH_(3))underset(|)(C)=O+NH_(2)-OH to "Oxime" overset(PCl_
Last Answer : In the given reaction which one of the following statement is correct - `C_(6)H_(5)- ... elimination reaction. D. oxime and amides are isomers.
Description : Among the complex ions, `[Co(NH_(2) - CH_(2) - CH_(2) - NH_(2))_(2) Cl_(2)]^(+), [CrCl_(2) (C_(2)O_(4))_(2)]^(3-)` `[Fe(H_(2)O)_(4) (OH)_(2)]^(+), [Fe
Last Answer : Among the complex ions, `[Co(NH_(2) - CH_(2) - CH_(2) - NH_(2))_(2) Cl_(2)]^(+), [CrCl_(2) ... (3)) Cl]^(2+)` and that show(s) cis-trans isomerism is
Description : Arragne basicity of the following compounds in decreasing order: `CH_(3)CH_(2)NH_(2)(I)," "H_(2)C=CH-NH_(2)(II),` `HC-=C-NH_(2)(III)," "C_(6)H_(5)NH_(
Last Answer : Arragne basicity of the following compounds in decreasing order: `CH_(3)CH_(2)NH_(2)(I), ... `IVgtIIIgtIIgtI` C. `IIIgtIIgtIgtIV` D. `IgtIIIgtIIgtIV`
Description : `Ph-overset(O)overset(||)(C)-NH_(2)+Ph-CH_(2)-overset(O)overset(||)(C)-overset(15)(N)H_(2) overset(overset(Theta)(OH)+Br_(2))rarr A+B` Products A and
Last Answer : `Ph-overset(O)overset(||)(C)-NH_(2)+Ph-CH_(2)-overset(O)overset(||)(C)-overset(15)(N)H_(2) overset(overset ... (2)-NH_(2)` D. `Ph-overset(15)(N)H_(2)`
Description : In the given reaction sequence `C_(6)H_(5)-CH_(2)-NH_(2) overset(CHCl_(3)//Alc.KOH)underset(Delta)rarr [X] overset(H_(2)O //NaOH)rarr [Y],[Y]` will be
Last Answer : In the given reaction sequence `C_(6)H_(5)-CH_(2)-NH_(2) overset(CHCl_(3)//Alc.KOH)underset(Delta)rarr [X] ... -NH_(2)` D. `C_(6)H_(5)-CH_(2)OH`
Description : In 1953 S.L. Miller created primitive earth conditions in the labortory and gave experimental evidence for origin of first form of life from pre-exist
Last Answer : In 1953 S.L. Miller created primitive earth conditions in the labortory and gave experimental evidence ... atmosphere containing `CH_(4)NH_(3)` etc.
Description : 6. In 1953 S L Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from pre existing non living organic molecules. The ... -reducing atmosphere. d) High temperature, volcanic storms, reducing atmosphere and contains NH3 and CH4
Last Answer : d) High temperature, volcanic storms, reducing atmosphere and contains NH3 and CH4
Description : Millaer and Urey performed an experiment to prove the origin of life. They took gases `NH_(3) and H_(2)` along with :
Last Answer : Millaer and Urey performed an experiment to prove the origin of life. They took gases `NH_(3) and H_(2)` along ... and N_(2)` D. `CO_(2) and NH_(3)`
Description : The racemic mixture of Alanine `(CH_(3)-underset(NH_(2))underset(|)(C )H-COOH)` can be resolved by using, (1) (+) -2-Butanol (2) (l)-2-Chlorobutanoic
Last Answer : The racemic mixture of Alanine `(CH_(3)-underset(NH_(2))underset(|)(C )H-COOH)` can be resolved by using, (1) ... 3 only C. 2 & 4 only D. 3 & 4 only
Description : What happens if the solution in the conical flask gets washed with distilled water during the experiment?
Last Answer : That will depend on what the solution is, as well as many otherpossible conditions what you failed to specify in yourquestion.
Description : Swan neck flask experiment proved :
Last Answer : Swan neck flask experiment proved : A. biogenesis B. abiogenesis C. special creation D. both (1) and (2)
Description : Amongest `H_(2)O,H_(2)S,H_(2)Se` and `H_(2)Te` the one with highest boiling point is :
Last Answer : Amongest `H_(2)O,H_(2)S,H_(2)Se` and `H_(2)Te` the one with highest boiling point is : A ... H-bonding D. `H_(2)Se` because of lower molecular weight
Description : Why is `H_(2)S` less acidic than `H_(2)Te` ?
Last Answer : Why is `H_(2)S` less acidic than `H_(2)Te` ? A. Less dissociation enthalpy of `H_(2)S` B. More ... ` is less D. Melting point of `H_(2)S` is less
Description : The boiling points of `H_(2)O,H_(2)S,H_(2)Se` and `H_(2)Te` are in the following order
Last Answer : The boiling points of `H_(2)O,H_(2)S,H_(2)Se` and `H_(2)Te` are in the following order A. `H_(2)OgtH_ ... (2)O` D. `H_(2)SgtH_(2)OgtH_(2)TegtH_(2)Se`
Description : The possible number of geometrical isomers for the complex `[CoL_(2) Cl_(2)]^(-) (L = H_(2)NCH_(2) CH_(2)O^(-))` is (are)....
Last Answer : The possible number of geometrical isomers for the complex `[CoL_(2) Cl_(2)]^(-) (L = H_(2)NCH_(2) CH_(2)O^(-))` is (are)....
Description : A well stoppered thermo flask containing some ice cubes is an example of
Last Answer : A well stoppered thermo flask containing some ice cubes is an example of A. Closed system B. ... system C. Isolated system D. Non-thermodynamic system
Description : Who among the following demonstrated experimentally that simple organic molecules like sugar s and amino acids could be produced from inorganic molecules if early earth atmosphere is created (a) Donald Brown (b) A.I. Oparin (c) Oscar Miller (d) Stanley Miller
Last Answer : Ans:(d)
Description : Stanley miller observed the formation of ______ during the experiment.
Last Answer : Stanley miller observed the formation of ______ during the experiment. A. Nuclei Acid B. Nucleotides C. Amino acid D. Polypeptide
Description : 5.Miller and Urey performed an experiment to p[rove origin of life.They took gases NH3 and H2 along with (a)N2 and H2O (b)H2O and CH4 (c)CH4 and N2 (d)CO2 and NH3
Last Answer : ANS.(B) H2O and CH4
Description : For the reaction `NH_(4)HS(s)rArrNH_(3)(g)+H_(2)S(g) ,K_(p)=0.09`. The total pressure at equilibrum is :-
Last Answer : For the reaction `NH_(4)HS(s)rArrNH_(3)(g)+H_(2)S(g) ,K_(p)=0.09`. The total pressure at equilibrum is :- ... atm B. 0.09 atm C. 0.6 atm D. 0.36 atm
Description : If a dilute solution of aqueous `NH_(3)` is saturated with `H_(2)S` then the product formed is :
Last Answer : If a dilute solution of aqueous `NH_(3)` is saturated with `H_(2)S` then the product formed is : A. `(NH_(4))_( ... (NH_(4))_(2)S_(x)` D. `NH_(4)OH+S`
Description : Let us consider the gases: `H_(2)S,CO_(2)` and `NH_(3)` How many of these gases can be dried by conc `H_(2)SO_(4)` ?
Last Answer : Let us consider the gases: `H_(2)S,CO_(2)` and `NH_(3)` How many of these gases can be dried by conc `H_(2)SO_(4)` ?
Description : `CH_(3) equiv C CH_(3) overset(Na, NH_(3) (i))(rarr) Q overset("dil. Cold")underset(KMnO_(4))(rarr) R` If Q is an unsaturated hydrocarbon then product
Last Answer : `CH_(3) equiv C CH_(3) overset(Na, NH_(3) (i))(rarr) Q overset("dil. Cold")underset(KMnO_(4))(rarr) R` If ... ii & iii B. i & ii C. only v D. only iv
Description : The conjugate base of `(CH_(3))_(2)overset(+)(NH_(2))` is :-
Last Answer : The conjugate base of `(CH_(3))_(2)overset(+)(NH_(2))` is :- A. `CH_(3)NH_(2)` B. `(CH_(3))_(2)N^(+)` C. `(CH_(3))_(2)N` D. `(CH_(3))_(2)NH`
Description : Correct order of basic strength in gas phase is (I) `CH_(3)-NH_(2)` (II) `(CH_(3))_(2)NH` (III) `(CH_(3))_(3)N` (IV) `NH_(3)`
Last Answer : Correct order of basic strength in gas phase is (I) `CH_(3)-NH_(2)` (II) `(CH_(3))_(2)NH` (III) `(CH_(3))_(3 ... C` C. `A gt C gt B` D. `C gt A gt B`
Description : An orgainc compound A upon reacting with `NH_(3)` gives `B` On heating `B` give `C.C` in presence `KOH` reacts with `Br_(2)` to yield `CH_(3)CH_(2)NH_
Last Answer : An orgainc compound A upon reacting with `NH_(3)` gives `B` On heating `B` give `C.C` in presence `KOH ... underset(|)(CH)-COOH` D. `CH_(3)CH_(2)COOH`
Description : In the chemical reaction `CH_(3)CH_(2)NH_(2) + CHCI_(3) + 3KOH rarr (A) + (B) + 3H_(2)O` the compound `(A) `and `(B)` are respectively
Last Answer : In the chemical reaction `CH_(3)CH_(2)NH_(2) + CHCI_(3) + 3KOH rarr (A) + (B) + 3H_(2)O` the compound ... `3KCl` D. `CH_(3)CH_(2)CONH_(2)` and `3KCl`
Description : The decreasing order of strength of the bases, `OH^(-), NH_(2)^(-), H-C-=C^(-)` and `CH_(3)-CH_(2)^(-)`:
Last Answer : The decreasing order of strength of the bases, `OH^(-), NH_(2)^(-), H-C-=C^(-)` and `CH_(3)-CH_(2)^(-)`: ... " IV"` D. `"II "gt" III "gt" I "gt" IV"`
Description : Which of the following sequence of reagent is the good mean to furnish the conversion? `R-CH_(2)OHrarr R -CH_(2)NH_(2)`
Last Answer : Which of the following sequence of reagent is the good mean to furnish the conversion? `R-CH_(2)OHrarr R -CH_(2) ... D. `Cu,300^(@)C,NH_(2),LiAiH_(4)`
Description : Which of the following can distinguish? `CH_(3)-overset(CH_(3))overset(|)(CH)-NH_(2)` and `CH_(3)-overset(H)overset(|)(N)-CH_(3)`
Last Answer : Which of the following can distinguish? `CH_(3)-overset(CH_(3))overset(|)(CH)-NH_(2)` and `CH_(3)-overset(H ... `Cs_(2),HgCI_(2)` D. `Ag_(2)O //Delta`
Description : The final major product of the reaction is: `Ph-overset(OH)overset(|)underset(Ph)underset(|)(C)-underset(" "NH_(2))underset(|)(CH)-CH_(3)overset(NaNO_
Last Answer : The final major product of the reaction is: `Ph-overset(OH)overset(|)underset(Ph)underset(|)(C)-underset(" " ... (" "CH_(3))underset(|)(C)-CH_(3)`
Description : Predict the nature of P in the following reaction: `Me_(3)C CH_(2)NH_(2) overset(HOMO)rarrP` (main product)
Last Answer : Predict the nature of P in the following reaction: `Me_(3)C CH_(2)NH_(2) overset(HOMO)rarrP` (main product) A. ` ... )H_(5)` D. `Me_(3)C CH_(2)NH(NO)`
Description : Which of the following will give unsymmetrical di-substituted urea after reaction with `CH_(3)NH_(2)`?
Last Answer : Which of the following will give unsymmetrical di-substituted urea after reaction with `CH_(3)NH_(2)`? A. ` ... `CH_(3)CH_(2)NCO` D. all of these
Description : The correct statement(s) about the compound `H_(3)C(HO)HC-CH=CH-CH(OH)CH_(3) (X)` is/are
Last Answer : The correct statement(s) about the compound `H_(3)C(HO)HC-CH=CH-CH(OH)CH_(3) (X)` is/are A ... is cis, the number of enantiomers possible for X is 2.
Description : How many of the following compounds would give Iodoform test (1) `s CH_(3) - CO - CH_(2) - CO - OCH_(3)` (2) `C_(6) H_(5) - CO - CH_(2) - CO - C_(6)H_
Last Answer : How many of the following compounds would give Iodoform test (1) `s CH_(3) - CO - CH_(2) - CO - OCH_(3)` (2 ... `CH_(3) - CO - CH_(2) - CHOH - CH_(3)`
Description : Te dimensions of frequency are a.107 dynes b.MLT c.L-1 d.T-1 e.L-1T-1
Last Answer : d. T-1
Description : Oxidation state of cobalt in `[Co(NH_(3))_(4)(H_(2)O)Cl]SO_(4)` is
Last Answer : Oxidation state of cobalt in `[Co(NH_(3))_(4)(H_(2)O)Cl]SO_(4)` is
Description : In the balanced equation - `[Zn+H^(+)+NO_(3)^(-)rarr NH_(4)^(-) rarr NH_(4)^(+) +Zn^(+2)+H_(2)O]` coefficient of `NH_(4)^(+)` is :-
Last Answer : In the balanced equation - `[Zn+H^(+)+NO_(3)^(-)rarr NH_(4)^(-) rarr NH_(4)^(+) +Zn^(+2)+H_(2)O]` coefficient ... (4)^(+)` is :- A. 4 B. 3 C. 2 D. 1
Description : 20.0 kg of `N_(2(g))` and 3.0 kg of `H_(2(g))` are mixed to produce `NH_(3(g))`. The amount of `NH_(3(g))` formed is :-
Last Answer : 20.0 kg of `N_(2(g))` and 3.0 kg of `H_(2(g))` are mixed to produce `NH_(3(g))`. The amount of `NH_(3 ... is :- A. 17 kg B. 34 kg C. 20 kg D. 3 kg