Description : The electron affinity for the inert gases is (a) Zero (b) High (c) Negative (d) Positive
Last Answer : Ans:(a)
Description : A characteristic of the noble gases is that they all: w) have eight electrons in the outer shell x) have low stability y) form many compounds z) have filled outer electron shells
Last Answer : ANSWER: Z -- HAVE FILLED OUTER ELECTRON SHELLS
Description : The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell
Last Answer : ANSWER: X -- ONLY WEAK VAN DER WAALS FORCES HOLD THE ATOMS TOGETHER
Description : Explain why Electron gain enthalpy of noble gases is positive.
Last Answer : Ans. Noble gases have large positive electron gain enthalpies because the extra electron has to be placed in the next higher principal quantum energy level, thereby producing highly unstable electronic configuration.
Description : The elements that have an outer electron configuration ns2 (read: n - s - 2) are called: w) halogens x) transition metals y) alkaline earths z) noble gases
Last Answer : ANSWER: Y -- ALKALINE EARTHS
Description : Why do noble gases such neon or argon have very low chemical reactivity?
Last Answer : They have very low chemical reactivity because they all have afull outer shell, i.e. they all have 8 electrons in their outershell. This makes them very stable and thus not very reactive.
Description : Give reason: Elements of group 18 or group zero are called inert or noble gases.
Last Answer : Elements of group 18 do not form chemical bond on their own with other elements as they have completed shells of electrons. They have no tendency to gain or lose electrons. Hence they are most un-reactive
Description : Noble gases are group of elements which exhibit very :
Last Answer : Noble gases are group of elements which exhibit very : A. High chemical activity B. Much ... C. Maximum electronegativity D. Low chemical activity
Description : Noble gases form compounds very easily with
Last Answer : Noble gases form compounds very easily with A. Sulphur B. Nitrogen C. Oxygen D. Fluorine
Description : Define the following : Atomic Radii , Ionization Energy , Electron Affinity , Electronegativity.
Last Answer : Ans :(1) Atomic Radii : An atom does not have strictly defined boundaries so it is impossible to determine the exact radius of an atom but theoretically it is defined as half the distance between the ... in Period : It increases from left to right in a period due to increase in nuclear charge.
Description : Which of the following terms refers to the energy released when an electron is added to a neutral atom? w) electrovalence x) electron affinity y) electroconductance z) none of these
Last Answer : ANSWER: X -- ELECTRON AFFINITY
Description : List the following atoms in order of increasing electron affinity: oxygen, boron, and fluorine.
Last Answer : ANSWER: (1) BORON, (2) OXYGEN, (3) FLUORINE
Description : The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The low boiling points of the lighter nob
Last Answer : The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. ... (C) unreactive D. (D) strongly basic
Description : The noble gases have closed-shell electronic cordigaration and are monatomic gases under normal condition .The low bolling points of the ligher noble
Last Answer : The noble gases have closed-shell electronic cordigaration and are monatomic gases under normal condition .The low ... (C) pyramidal D. (D) T-shaped
Last Answer : The noble gases have closed-shell electronic configuration and are monoatomic gases under normal ... flammablity D. (D) high calorific value
Last Answer : The noble gases have closed-shell electronic configuration and are monoatomic gases under normal ... reducing C. unreactive D. strongly basic
Last Answer : The noble gases have closed-shell electronic cordigaration and are monatomic gases under normal condition .The ... B. planar C. pyramidal D. T-shaped
Last Answer : The noble gases have closed-shell electronic cordigaration and are monatomic gases under normal condition ... C. flammability D. high calorific value
Description : A specific fructokinase present in liver has a very high affinity for its substrate because (A) Km for fructose is very high (B) Km for fructose is very low (C) Activity is affected by fasting (D) Activity is affected by insulin
Last Answer : Answer : B
Description : All noble gases are - (1) Colourless (2) Odourless (3) Colourless and Odourless (4) Light blue
Last Answer : (3) Colourless and Odourless Explanation: Other characteristics of the noble gases are that they all conduct electricity, fluoresce, are odorless and colorless, and are used in many conditions when a stable element is needed to maintain a safe and constant environment.
Description : Which one of the following noble gases is not found in the atmosphere? (1) Argon (2) Krypton (3) Radon (4) Xenon
Last Answer : (3) Radon Explanation: All the noble gases are present in Earth's atmosphere and, except for helium and radon, their major commercial source is the air, from which they are obtained by liquefaction and fractional distillation.
Description : why do noble gases have bigger atomic size than halogens?
Last Answer : Ans.Noble gases have higher atomic size than halogens because Van der Waals radii are bigger than covalent radii.
Description : Name any five of the six noble gases.
Last Answer : ANSWER: HELIUM, NEON, ARGON, KRYPTON, XENON, OR RADON
Description : Which one of the following statements is TRUE regarding the molar heat capacity for the noble gases? w) heat capacity decreases from Helium to Xenon x) heat capacity increases from helium to argon y) heat ... Helium to Argon, then decreases to Xenon z) heat capacity is the same for all noble gases
Last Answer : ANSWER: Z -- HEAT CAPACITY IS THE SAME FOR ALL NOBLE GASES
Description : 76. People who have migrated from the planes to an area adjoining Rohtang Pass about six months back (1) Have the usual RBC count but their haemoglobin has very high binding affinuty of O2 (2 ... to play games like football (4) Suffer from altitude sickness with symptoms like nausea, fatigue, etc
Last Answer : Have more RBCs and their haemoglobin has a lower binding affinity of O2
Description : Which element has the lowest electron affinity? -Do You Know?
Last Answer : answer:
Description : Assertion :- First electrons affinity fo all element is positive. Reason :- Successive electron affinity of all elements is negative
Last Answer : Assertion :- First electrons affinity fo all element is positive. Reason :- Successive electron affinity ... D. If both Assertion & Reason are false
Description : Electron affinity order of chalcogens is
Last Answer : Electron affinity order of chalcogens is A. `SgtSegtTegtO` B. `OgtSgtSegtTegtPo` C. `SgtOgtSegtTegtPo` D. `PgtPogtTegtSegtS`
Description : Explain the trend of the following in group 13 elements : A. atomic radii B. ionization enthalpy C. electron affinity
Last Answer : Explain the trend of the following in group 13 elements : A. atomic radii B. ionization enthalpy C. electron affinity
Description : Who can help me with this problem Rank the following elements by electron affinity from most positive to most negative I have the elements Ar Cl O Sb and Rb?
Last Answer : The order is: O, Cl, Sb, Rb, Ar.
Description : The energy released when an extra electron is added to a neutral gaseous atom is called (a) Bond energy (b) Electron affinity (c) Ionization potential (d) Electronegativity
Last Answer : Ans:(b)
Description : Which element has the lowest electron affinity?
Last Answer : Argon
Description : Give reason: sodium has lower electron affinity than chlorine atom.
Last Answer : As electron affinity increases across a period (from left to right)
Description : which of the following is not true in regard to noble gases? -General Knowledge
Last Answer : These elements tend to gain or lose electrons easily. -is not true in regard to noble gases.
Description : The correct order of boiling point of noble gases is :
Last Answer : The correct order of boiling point of noble gases is : A. `Xe lt Kr lt Ar lt Ne` B. `Kr lt Xe lt Ar lt Ne ... lt Kr lt Ne` D. ` Xe gt Kr gt Ar gt Ne`
Description : Consider following properties of the noble gases. I. They readily form compounds which are colourless. II: They generally do not form ionic compounds.
Last Answer : Consider following properties of the noble gases. I. They readily form compounds which are colourless. II: They ... IV C. I,III,IV D. (D) All
Description : The order of solubility of noble gases in water is
Last Answer : The order of solubility of noble gases in water is A. (A)HegtArgtKrgtNegtXe B. (B)HegtNegtArgtKrgtXe C. (C)XegtArgtKrgtHegtNe D. (D)XegtKrgtArgtNegtHe
Description : How many of the following properties of noble gases would increase from Helium to Radon? Boiling point, First lonisation enthalpy, Atomic volume, Abun
Last Answer : How many of the following properties of noble gases would increase from Helium to Radon? ... Density at STP. Valence electrons, Critical temperature.
Description : Which one of the following noble gases is not found in atmosphere ?
Last Answer : Which one of the following noble gases is not found in atmosphere ? A. (A) Rn B. (B) Kr C. Ne D. (D) Ar
Description : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with highly electronegative elements like F and
Last Answer : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with ... )d` and linear D. `sp` and linear
Last Answer : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with highly ... D. `sp^(3)d^(2)` & 2
Last Answer : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with highly ... A. zero B. 2 C. 6 D. 8
Description : Asseration: The first real compound of the noble gases in `1962 "was" Xe^(+)[PtF_(6)]^(-)`. Reason: The discovery was based on the basis of comparable
Last Answer : Asseration: The first real compound of the noble gases in `1962 "was" Xe^(+)[PtF_(6)]^(-)`. Reason: The discovery ... = 90^(@)` D. `A = B = 90^(@)`
Last Answer : Asseration: The first real compound of the noble gases in `1962 "was" Xe^(+)[PtF_(6)]^(-)` ... `. A. tetrahedral B. pyramidal C. octahedral D. angular
Description : Among noble gases, Xe is quite reactive and form a number of fluorides and oxyfluorides. In these compounds the electrons, from 5p orbitals are excite
Last Answer : Among noble gases, Xe is quite reactive and form a number of fluorides and oxyfluorides. In these ... B. Square pyramid C. square planar D. octahedral
Last Answer : Among noble gases, Xe is quite reactive and form a number of fluorides and oxyfluorides. In these compounds ... `XeF_(2)` and tetraheddral `XeO_(3)`
Last Answer : Among noble gases, Xe is quite reactive and form a number of fluorides and oxyfluorides. In these compounds the ... ` C. `XeO_(2)F_(2)` D. Xe
Description : The noble gases which do not form any clatherate
Last Answer : The noble gases which do not form any clatherate A. He B. Ar C. Kr D. Xe
Description : Which of the following noble gases do not reasct with function
Last Answer : Which of the following noble gases do not reasct with function A. Xe B. He C. Ar D. Kr