Description : Thermal decomposition of alkanes is known as which name? -General Knowledge
Last Answer : The answer is 'Cracking'
Last Answer : answer:
Description : Thermal decomposition of alkanes is known as which name?
Last Answer : Cracking
Description : The thermal decomposition of alkanes in the absence of air is called : (a) Combustion (b) Oxidation (c) Cracking (d) Hydrogenation
Description : Which of the following compounds on thermal decomposition yields as basic as well as acidic oxides ?
Last Answer : Which of the following compounds on thermal decomposition yields as basic as well as acidic oxides ? A. `Ca(OH)_(2) ... C. `K_(2)CO_(3)` D. `MgCO_(3)`
Description : For per gram of reactant, the maximum quantity of `N_(2)` gas is produce in which of the following thermal decomposition reactions ? (Given : Atomic w
Last Answer : For per gram of reactant, the maximum quantity of `N_(2)` gas is produce in which of the following thermal ... rarr N_(2) (g) + 3H_(2) (g)`
Description : The compound that does not produce nitrogen gas by the thermal decomposition is
Last Answer : The compound that does not produce nitrogen gas by the thermal decomposition is A. `NH_(4)NO_(2)` B. `(NH_(4))_(2 ... 2)` D. `(NH_(4))_(2)Cr_(2)O_(7)`
Description : Nitrogen is obtained by the thermal decomposition of :
Last Answer : Nitrogen is obtained by the thermal decomposition of : A. `NH_(4)Cl` B. `NH_(4)NO_(3)` C. `AgNO_(3)` D. `NH_(4)NO_(2)`
Description : Thermal decomposition product(s) of `XeF_(2)` are:
Last Answer : Thermal decomposition product(s) of `XeF_(2)` are: A. `Xe` B. `XeF_(2)` C. `XeF_(4)` D. `F_(2)`
Description : Asseration: The thermal stability of hydrides of oxygen family decrease with molecular weight. Reason: The decomposition of `M-H` bond requires lesser
Last Answer : Asseration: The thermal stability of hydrides of oxygen family decrease with molecular weight. Reason: The decomposition ... in `O-H` than `S-H`.
Description : What are the uses of thermal decomposition?
Last Answer : Need answer
Description : What is the equation of the thermal decomposition of silane?
Last Answer : The chemical equation is:SiH4 = Si + 2 H2
Description : Crude oil is subjected to vacuum distillation in the last stage, because (A) High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose (B) Lighter/low ... prone to thermal decomposition (C) High purity products can be obtained thereby (D) None of these
Last Answer : (A) High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose
Description : High pressure at the bottom of a distillation tower handling heat sensitive materials results in (A) Thermal decomposition of bottoms (B) Increased relative volatility (C) Erosion of the tower (D) Very efficient operation
Last Answer : (A) Thermal decomposition of bottoms
Description : Steam distillation is used to (A) Reduce the number of plates (B) Avoid thermal decomposition of a component (C) Increase the efficiency of separation (D) Increase the total pressure of distillation
Last Answer : (B) Avoid thermal decomposition of a component
Description : mmonium nitrate is (A) Having about 40% N2 (B) Not hygroscopic (C) Not prone to explosive thermal decomposition (D) Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer
Last Answer : (D) Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer
Description : Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate (A) Is prone to thermal decomposition (B) Has high water solubility and is unstable (C) Is soluble in ammonium chloride and potassium chloride solution (D) All (A), (B) and (C)
Last Answer : (C) Is soluble in ammonium chloride and potassium chloride solution
Description : Hydrocarbons that contain a triple bond between carbon atoms are known as: w) alkenes x) alkanes y) alkynes z) polymers
Last Answer : ANSWER: Y -- ALKYNES
Description : The general formula of alkanes is
Last Answer : C n H 2n+2
Description : What kind of combustion is observed in alkanes? Why do air holes of a gas burner have to be adjusted when vessel being heated gets blackened by the flame? -Science
Last Answer : Alkanes are saturated hydrocarbons and generally burn in air with a blue, non-sooty flame. If the bottoms of the cooking vessels in our homes are getting blackened, it shows that the air holes of the gas stove are getting blocked and the fuel is not burning completely.
Description : How many alkanes (only structural isomers) are possible with the molecular formula `C_(4)H_(8)`
Last Answer : How many alkanes (only structural isomers) are possible with the molecular formula `C_(4)H_(8)` A. 4 B. 3 C. 5 D. 6
Description : How can we separate Alkanes?
Description : Saturated hydrocarbons are called - (1) Alkynes (2) Alkenes (3) Alkanes (4) All of the above
Last Answer : (3) Alkanes Explanation: Carbon compounds which contain just carbon and hydrogen are called hydrocarbons. Among these, the saturated hydrocarbons are called alkanes. The unsaturated hydrocarbons which contain one or more double bonds are called alkenes.
Description : What is another name of alkanes?
Last Answer : Paraffins
Description : What are alkanes? Why are they called paraffins?
Last Answer : Ans. Those hydrocarbons which contain single bond between carbon- carbon are called alkanes. They are called paraffins because they are very less reactive (Latin- Parum= little, affins = affinity)
Description : Arrange the following in order of decreasing reactivity towards alkanes. HCl, HBr, HI, HF
Last Answer : Ans. HI> HBr> HCl >HF
Description : Explain why Grignard reagents do not reacts with alkanes.
Last Answer : Ans. In alkanes , the C – H bond has very little polarity . The hydrogen cannot be abstracted by the Grignard reagent.
Description : Why do the C-C bonds rather than C-H bonds break during cracking of alkanes?
Last Answer : Ans. Since the bond dissociation energy of C-C bonds (348kj /mol) is lower than bond dissociation energy of C-H bonds (414kj/mol), therefore, during cracking of alkanes, C-C bonds break more early than C-H bonds.
Description : Why are alkanes called paraffins?
Last Answer : Paraffin’s means little affinity; alkanes due to strong C-C and C-H bonds are relatively chemically inert.
Description : What is the hybridization of carbon atoms in alkanes ?
Last Answer : Ans. Sp3
Description : Long chain alkanes or alkenes containing terminal carboxylic acid ( – COOH) are called
Last Answer : fatty acid.
Description : The first member of the alkanes or saturated hydrocarbon is
Last Answer : methane.
Description : Give reason: Alkanes undergo only substitution reactions but alkenes and alkynes undergo both substitution and addition reactions.
Last Answer : Alkenes and alkynes have double and triple bonds, which on breaking can add hydrogen atoms to satisfy the valency.
Description : Compare the characteristics of alkanes, alkenes and alkynes.
Last Answer : Alkanes Alkynes They are saturated They are unsaturated They are unsaturated Their general formula is C n H 2n+2 Their general formula is C n H 2n Their general formula is C n H 2n-2 They have ... ene' They have triple bond between one of the carbon atoms. Their names end with yne'
Description : Give reason: Alkanes are chemically stable.
Last Answer : In alkanes all carbon atoms are bonded to the maximum number of hydrogen atoms. They are made up single bond between carbon atoms and are saturated with hydrogen in every bond is used. Hence they are chemically stable.
Description : Why are alkanes referred to as paraffins?
Last Answer : Paraffin is derived from the Latin word meaning ‘less activity’. Alkanes are compounds which undergo few reactions. Hence they are referred to as paraffins.
Description : Mention the characteristics of alkanes.
Last Answer : a) In alkanes the carbon atoms are bonded with maximum number of hydrogen atoms. b) They have single bond between carbon atoms. c) Their general formula is C n H 2n+2
Description : What are alkanes?
Last Answer : Alkanes are saturated hydrocarbons in which the carbon atoms are connected by only single bond. Ex: Methane, Ethane, Propane
Description : Why do first three alkanes methane, ethane and propane have no isomers?
Last Answer : Methane (CH 4 ), ethane (C 2 H 6 ) and propane (C 3 H 8 ) have no scope for branching of C – C chain hence they do not exhibit isomerism.
Description : Cycloalkanes have the same molecular formula as : (a) Alkanes (b) Alkenes (c) Alkynes (d) Cycloalkenes
Last Answer : Alkenes
Description : Ninhydrin test is given by (a) Carbohydrates (b) Proteins (c) Alkanes (d) Alkenes
Last Answer : Proteins
Description : The high boiling points of alcohols, as compared to the corresponding alkanes, are due to (a) Hydrogen bonding (b) Heavy oxygen atom (c) Water solubility (d) None of these
Last Answer : Hydrogen bonding
Description : Which statements about alkenes and alkanes of corresponding chain lengths is true? (I) Alkenes have slightly lower melting points than alkanes (II) Alkenes have slightly higher melting points than alkanes (III) Alkenes have higher boiling ... (a) I and III (b) II and IV (c) I and IV (d) II and III
Last Answer : I and III
Description : Which of the following methods can be used to increase the octane rating of gasoline? (a) Adding branched-chain alkanes (b) Adding tetraethyllead (c) Adding aromatic hydrocarbons (d) All of these
Last Answer : All of these
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 : In the chlorination of alkanes, the first step in which chlorine free radicals are produced is called : (a) initiation (b) activation (c) propagation (d) deactivation
Last Answer : initiation
Description : Why is the halogenation of alkanes considered a chain reaction? (a) it occurs quickly. (b) it occurs without the generation of intermediates. (c) each step generates the reactive intermediate that causes the next step to occur. (d) the reaction allows long chains of halogenated alkanes to be formed
Last Answer : each step generates the reactive intermediate that causes the next step to occur