Description : The atomic masses of three elements X, Y and Z having similar chemical properties are 7, 23 and 39 respectively. a) Calculate the average atomic mass of elements X and Z. b) How is the ... this example? d) Give another example of a set of elements which are classified according to this law.
Last Answer : a) The average atomic mass of X and Z = 7 39 2 46 2 23 b) The average atomic mass of X and Z is equal to the atomic mass of Y c) The law illustrated in this example is Dobereiner’s law of triads. d) Another example of Dobereiner’s law is Calcium, Strontium and Barium.
Description : `X underset("ether")overset(Mg)rarrY underset(H^(+))overset("Dry " CO_(2))rarr X overset("hot " KMnO_(4))rarrP` The two isomeric compounds which will
Last Answer : `X underset("ether")overset(Mg)rarrY underset(H^(+))overset("Dry " CO_(2))rarr X overset("hot " KMnO_(4)) ... B. III and IV C. I and IV D. II and III
Description : Which is true for the following isomeric forms I & II respectively :
Last Answer : Which is true for the following isomeric forms I & II respectively : A. `{:(IgtII,IgtII,IIgtI,IgtII):}` B ... ):}` D. `{:(IIgtI,IIgtI,IgtII,IgtII):}`
Description : How many structural isomeric alkenes are possible with molecular formula `C_(5)H_(10)` that does not show geometrical isomerism
Last Answer : How many structural isomeric alkenes are possible with molecular formula `C_(5)H_(10)` that does not show geometrical isomerism A. 2 B. 4 C. 5 D. 3
Description : How many isomeric forms are possible for the octahedral complex. `[Rh(en)_(2)(NO_(2))(SCN)]^(+)` ?
Last Answer : How many isomeric forms are possible for the octahedral complex. `[Rh(en)_(2)(NO_(2))(SCN)]^(+)` ?
Description : Select the correct option (s) for the coordination compounds and their respectively isomeric forms.
Last Answer : Select the correct option (s) for the coordination compounds and their respectively isomeric forms.
Description : Whichof the following polymer does not exist in geometrical isomeric forms?
Last Answer : Whichof the following polymer does not exist in geometrical isomeric forms? A. Polyisoprene B. Polyacetylene C. Polybutadiene D. Polypropylene
Description : Ethers are isomeric with
Last Answer : Ethers are isomeric with A. Aldehydes B. Acids C. Alcohols D. Ketones
Description : The compound which is not isomeric with diethyl ether is :
Last Answer : The compound which is not isomeric with diethyl ether is : A. Butanone B. Methyl propyl ether C. 2-methyl propane -2-ol D. Butanol -1
Description : How many isomeric compounds are possible for `C_(4)H_(10)O` ?
Last Answer : How many isomeric compounds are possible for `C_(4)H_(10)O` ? A. 4 B. 5 C. 6 D. 7
Description : Why does NH2Cl have any isomeric forms?
Last Answer : Need answer
Description : The carbon atom wh ich becomes asymmetric when the straight chain form of monosaccharide changes into ring form is known as CARBOHYDRATES AND CARBOHYDRATE METABOLISM 9 (A) Anomeric carbon atom (B) Epimeric carbon atom (C) Isomeric carbon atom (D) None of these
Last Answer : A
Description : How many isomeric dichlorobenzenes are there? (a) 3 (b) 6 (c) 9 (d) 12
Last Answer : 3
Description : Which of the following statements is false about glyceraldehyde? (a) Its IUPAC name is 1,2-dihydroxypropanal (b) It is isomeric with 1,3-dihydroxypropanone (c) It is optically active (d) It shows mutarotation
Last Answer : It shows mutarotation
Description : Ethanol is isomeric with (a) Dimethyl ether (b) Ethanal (c) Diethyl ether (d) Propanone
Last Answer : Dimethyl ether
Description : Consider the three isomeric alkanes n-hexane, 2,3-dimethylbutane, and 2- methylpentane. Which of the following correctly lists these compounds in order of increasing boiling point? (a) 2,3-dimethylbutane < 2- ... < 2, 3-dimethylbutane < n-hexane (d) n-hexane < 2-methylpentane < 2,3-dimethylbutane
Last Answer : 2,3-dimethylbutane < 2-methylpentane < n-hexane
Description : Which of the following isomeric compounds show optical isomerism : (a) 1-Aminopentane (b) 2-Aminopentane (c) 3-Aminopentane (d) 2,2-Dimethylpropylamine
Last Answer : 2-Aminopentane
Description : How many isomeric aromatic hydrocarbons are possible for C8H10? (a) 3 (b) 4 (c) 5 (d) 6
Last Answer : 4
Description : Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z? A) Has high melting point B) Has low melting point C) Conducts electricity in molten state D) Occurs as solid
Last Answer : B) Has low melting point
Description : Most of the new atoms formed when atoms in a nuclear reactor capture neutrons without fissioning are: w) fission products x) activation products y) actinides z) lead isotopes
Last Answer : ANSWER: Y -- ACTINIDES
Description : `[HXeO_(4)]^(-)+Ohrarr[X]+[Y]+O_(2)+H_(2)O` The products `[X]` and `[Y]` in unbalanced reaction are:
Last Answer : `[HXeO_(4)]^(-)+Ohrarr[X]+[Y]+O_(2)+H_(2)O` The products `[X]` and `[Y]` in unbalanced reaction are ... -) & XeO_3` C. `XeO_3 & Xe` D. `H_2XeO_4 & Xe`
Description : The rate of a chemical reaction can be affected by: w) temperature x) concentration of products y) concentration of reactants z) all of the above
Last Answer : ANSWER: Z -- ALL OF THE ABOVE
Description : In protolytic reactions in which the reactants are much stronger as an acid and a base than the products, the proton transfer reaction: w) does not occur x) approaches completeness y) produces a much stronger acid and a much weaker base z) produces a much weaker acid and a much stronger base
Last Answer : ANSWER: X -- APPROACHES COMPLETENESS
Description : The Rate Law expresses the rate of a reaction in terms of the concentrations of the: w) reactants x) products y) by-products z) catalysts
Last Answer : ANSWER: W -- REACTANTS
Description : What chemical/physical properties help compare fuels in combustion engines? and how to apply them.
Last Answer : The ratings for fuel energy, flame propagation, combustion speed are based on comparison with octane in gasoline and pentane or cetane (depending on the applicatton) for diesel or jet fuel.. ... are many textbooks on petroleum technology, the Wiki article and references give a good starting point.
Description : Compare chemical properties of metals and non-metals.
Last Answer : Compare chemical properties of metals and non-metals.
Description : How do you Compare the properties or metals and no metals?
Description : How do the physical properties of diamond compare to the physical properties of graphite?
Description : Compare the properties of amorphous and crystalline silicon
Last Answer : morphous silicon It is a brown powder It does not conduct electricity at low temperatures. It is more reactive than crystalline silicon When heated in air, it oxidizes at the surface level ... electricity It is less reactive than amorphous silicon It does not burn in air even when heated
Description : The products formed in the reaction of cumene with `O_(2)` followed by treatment with dil. HCl are :
Last Answer : The products formed in the reaction of cumene with `O_(2)` followed by treatment with dil. HCl are : A. B. C. D.
Description : In the given reaction how many of the following products (1-9) can be formed.
Last Answer : In the given reaction how many of the following products (1-9) can be formed.
Description : Total aldol condensation products (including stereosimers) formed by the reaction between acetaldehyde and acetophenone is :
Last Answer : Total aldol condensation products (including stereosimers) formed by the reaction between acetaldehyde and acetophenone is :
Description : Find out products which are formed by the following reaction:
Last Answer : Find out products which are formed by the following reaction: A. B. C. D.
Description : In the reaction `(CH_(3))_(3)C-O-CH_(2)CH_(3)+underset((1"mole"))(HI)overset(heat)(rarr)` the products formed is (are)
Last Answer : In the reaction `(CH_(3))_(3)C-O-CH_(2)CH_(3)+underset((1"mole"))(HI)overset(heat)(rarr)` the products ... (H)underset(|)O^(+)-CH_(2)CH_(3)I^(-)`
Description : What are the products formed in the reaction of xenon hexafluoride with silicon dioxide?
Last Answer : What are the products formed in the reaction of xenon hexafluoride with silicon dioxide? A. `XeSiO_(4) +HF` B. ` ... 2)+SiF_(4)` D. `XeO_(3)+SiF_(4)`
Description : In the scheme given below, the total number of intramolecular aldol condensation products formed from (Y) is
Last Answer : In the scheme given below, the total number of intramolecular aldol condensation products formed from (Y) is
Description : While discussing the properties of a parallelogram teacher asked about the relation between two angles x and y of a parallelogram as shown ... -Maths 9th
Last Answer : (a) Yes , x < y is correct (b) Ð ADB =Ð DBC = y (alternate int. angles) since BC < CD (angle opp. to smaller side is smaller) there for, x < y (c) Truth value
Description : X and Y are the two elements having similar properties which obey Newland’s law of octaves. How many elements are there in-between X and Y?
Last Answer : There are 6 elements between X and Y
Description : Properties of elements X: (i) Its amide is used as a reducing agent (ii) Its amalgam is used as reducing agent Properties of element Y: (i) It is an o
Last Answer : Properties of elements X: (i) Its amide is used as a reducing agent (ii) Its amalgam is ... in its maximum oxidation state is neutral in aq. Medium
Last Answer : Properties of elements X: (i) Its amide is used as a reducing agent (ii) Its amalgam is used as ... oxidation number of Y in this compound is `+4`
Last Answer : Properties of elements X: (i) Its amide is used as a reducing agent (ii) Its amalgam is used as reducing agent ... 3` and `+5` D. `-2` and `+4`
Description : The theory which ascribes wave-like properties to particles is called: w) general relativity x) quantum mechanics y) special relativity z) classical mechanics
Last Answer : ANSWER: X -- QUANTUM MECHANICS
Description : Refractory metals are known for which of the following properties: w) lack of chemical reactivity x) low density y) high melting point z) high thermal conductivity
Last Answer : ANSWER: Y -- HIGH MELTING POINT
Description : Which of the following physical properties is TRUE of most dense ceramic materials? w) high tensile strength x) good ductility y) high compressive strength z) high electrical conductivity
Last Answer : ANSWER: Y -- HIGH COMPRESSIVE STRENGTH
Description : The amount of heat required to change a boiling liquid to a gas at the same temperature depends on one of the following properties of the liquid. Does it depend on the liquid's: w) heat of fusion x) heat of vaporization y) temperature z) density
Last Answer : ANSWER: X -- HEAT OF VAPORIZATION
Description : The compound which would have the greatest molar effect on the colligative properties of a dilute solution would be: w) CaCl2 x) NaCl y) C6H12O6 z) Benzene
Last Answer : ANSWER: W -- CaCl2
Description : For a substance, density, solubility and melting point are examples of: w) physical properties x) amorphous properties y) chemical properties z) potential properties
Last Answer : ANSWER: W -- PHYSICAL PROPERTIES
Description : Which of the following is the same for both radioactive iodine and stable iodine? w) number of neutrons x) mass number y) half-life z) chemical properties
Last Answer : ANSWER: Z -- CHEMICAL PROPERTIES
Description : Which of the following properties is lower for a solution than for the pure solvent? w) osmotic pressure x) vapor pressure y) temperature z) boiling point
Last Answer : ANSWER: X -- VAPOR PRESSURE