Description : If neutral atoms become positive ions they?
Last Answer : have lost electrons
Description : Pick out the correct statement. (A) Loss of electrons from neutral atoms produces negative ions (B) The radius of nucleus & atomic size are of the order of 10 -12 cm & 10 - 8 cm respectively (C) Gain of electrons by neutral atoms form cations
Last Answer : (B) The radius of nucleus & atomic size are of the order of 10 -12 cm & 10 - 8 cm respectivel
Description : At neutral pH, a mixture of amino acids in solution would be predominantly: (A) Dipolar ions (B) Nonpolar molecules (C) Positive and monovalent (D) Hydrophobic
Last Answer : Answer : A
Last Answer : (A) Dipolar ions
Description : The amino acid exist as Zwitter ions when they are in (A) solid state (B) acidic solution (C) alkaline solution (D) neutral solution
Last Answer : Answer : D
Description : Phosphorus and nitrogen ions generally get depleted in soil because they usually occur as (a) neutral ions (b) negatively charged ions (c) positively charged ions (d) both positively and negatively charged but disproportionate mixture.
Last Answer : (b) negatively charged ions
Description : What is the ratio of Femc003-1.jpg ions to Omc003-2.jpg ions in a neutral compound?
Last Answer : What is the answer ?
Description : Lipids are insoluble in water because lipid molecules are (a) hydrophilic (b) hydrophobic (c) neutral (d) zwitter ions.
Last Answer : (b) hydrophobic
Description : An aqueous solution of glycine is neutral because of the formation of : (a) Carbanion (b) Zwitterion (c) Carbonium ions (d) Free radicals
Last Answer : Zwitterion
Description : In a neutral solution (A) H+ions are absent (B) OH ions are absent (C) Both H+ and OH ions are present in very small but equal concentration (D) None of these
Last Answer : (C) Both H+ and OH ions are present in very small but equal concentration
Description : Assertion :- In the reaction `Zn(s)+cu^(+2)(aq)rarrZn^(+2)(aq)+Cu(s)` `Cu^(+2)` ions act as oxidising agent and Zn atoms act as a reducing agent. Reas
Last Answer : Assertion :- In the reaction `Zn(s)+cu^(+2)(aq)rarrZn^(+2)(aq)+Cu(s)` `Cu^(+2)` ions ... the Reason is False. D. If both Assertion & Reason are False.
Description : What is A repeating pattern of atoms ions or molecules in a mineral called?
Last Answer : crystalline structure
Description : How do atoms of nonmetallic elements generally form ions?
Last Answer : Non metals usually form ions by gaining electrons to becomeanions (negatively charged ions).
Description : Why the ionic radii of negative ions are larger than size of their parent atoms?
Last Answer : because when electron are aded to form a anion , the increase of electron_elctron repulsion cause the elcectron to spread out in more spaces
Description : In a chemical reaction, __________ are conserved. (A) Ions (B) Masses (C) Atoms (D) Both (B) & (C)
Last Answer : (D) Both (B) & (C)
Description : Homolytic fission of covalent bond between carbon atoms will produce : (a) Two carbonium ions (b) Two molecules (c) Free radicals (d) Carbonium ion and carbanion
Last Answer : Free radicals
Description : Atoms with varying mass numbers are called ________. a. Electrons b. Ions c. Isotopes d. Neutrons
Last Answer : c. Isotopes
Description : An inert element has electron shells that a. Overlap The Shells Of Other Atoms. b. Are Completely Filled With Electrons. c. Yield Hydrogen Ions. d. Form Covalent Bonds.
Last Answer : b. Are Completely Filled With Electrons.
Description : Atoms of the same element that have different numbers of neutrons are called _______ a. isotopes b. ions c. isomers d. inert elements
Last Answer : a. isotopes
Description : Which of the following atoms or ions would be the smallest? w) sodium atom x) magnesium atom y) singly charged sodium ion z) doubly charged magnesium ion
Last Answer : ANSWER: Z -- DOUBLY CHARGED MAGNESIUM ION
Description : Which one is different for the neutral atoms of the isotopes of an element? (A) Atomic weights (B) Atomic numbers (C) Number of protons (D) Number of electrons
Last Answer : (A) Atomic weights
Description : The accelerated positive ions in a discharge tube colide with_________to eject electrons.
Last Answer : The accelerated positive ions in a discharge tube colide with_________to eject electrons.
Description : An ionized gas contains both positive and negative ions . If it is subjected simultaneously to an electric field along the ` +x` - direction and a mag
Last Answer : An ionized gas contains both positive and negative ions . If it is subjected simultaneously to ... y-direction and negative ions towards +y-direction
Description : Do the positive charges of calcium ions and sodium ions make these ions more likely to move into or out of the cell?
Last Answer : Need answer
Description : What is a type of bond in which positive and negative charged ions attract each other in an ionic bond?
Last Answer : That is called an ionic bond or coulombic attraction.
Description : Why do gamma radiation produce positive ions?
Last Answer : If a gamma ray knocks an electron out of an atom, the remainingatom (assuming it was originally neutral) will have one electronless - therefore it will have a positive charge.
Description : How Compare the formation of positive ions with the formation of negative ions in terms of energy changes?
Description : What of the eight elements in the table is most likely to form a positive ions and why?
Description : Consider the following statements: 1. When a nerve fibre is stimulated, a profound change is produced in the electrical properties of surface membrane and in steady potential. 2. Upon excitation, the resting potentialis suddenly changed. 3. It is due ... 1, 2, 3 (b) 2, 3 (c) 1, 2, 3, 4 (d) 1, 2, 4
Last Answer : Ans:(d)
Description : Consider the following statements: 1. Even when a nerve cell is not conducting an impulse, it is actively transporting K+ and Na+ ions in and out respectively against their concentration gradients at the expense of energy 2. As a ... is/are untrue? (a) 1 only (b) 1, 2, 4 (c) 2, 4 (d) 4 only
Description : A level of atmosphere which is composed partly of electrons and positive ions is called – (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Mesosphere
Last Answer : (2) Ionosphere Explanation: Ionosphere is composed partly of electrons and positive ions. It is a region of Earth's upper atmosphere, from about 60 km to 1,000 km altitude, that is ionized by solar radiation. This layer is also called thermosphere as its temperature rises with height.
Description : In the illustration, the component labeled 'G' is ______. EL-0031 A. hard rubber, plastic or bituminous composition B. porous inside to absorb excess positive ions C. precharged for (-) and (+) in manufacturing D. All the above
Last Answer : Answer: A
Description : In p-type semiconductor the majority carriers are (A) holes. (B) electrons. (C) positive ions. (D) negative ions.
Last Answer : (A) holes.
Description : Which of the following terms denotes the polar molecules or negative ions clustered about a central positive ion? w) ligands x) isomers y) complex ions z) dipoles
Last Answer : ANSWER: W -- LIGAND
Description : A level of atmosphere which is composed partly of electrons and positive ions is called (1) Troposphere (2) Ionosphere (3) Stratosphere (4) Mesosphere
Last Answer : Ionosphere
Description : Is playing the numbers game more negative, neutral, or positive?
Last Answer : Overall I would have to say neutral. The numbers game IMO will play out much differently depending on the issue or task at hand.
Description : Which of the following compounds decolourise `Br_(2) - H_(2)O` and also give positive test with neutral `FeCl_(3)` :
Last Answer : Which of the following compounds decolourise `Br_(2) - H_(2)O` and also give positive test with neutral `FeCl_(3)` : A. B. C. D.
Description : A hexa peptide with 5 aspartic acid would have a net charge at pH 7: (A) Neutral (B) Positive (C) Negative (D) Not predictable
Last Answer : Answer : C
Description : A good conductor while carrying current is - (1) alternately charged positive and negative (2) negatively charged (3) positively charged (4) electrically neutral
Last Answer : (2) negatively charged Explanation: Electrons carry current in a good conductor of electricity and they are negatively charged. This makes a good electrical conductor negatively charged.
Description : In the schematic diagram of the DC compound generator shown in the illustration, the positive ammeter reading is 500 amps and the negative ammeter reading is 475 amps. What is the current flow through the neutral bus? EL-0037 A. 0 amp B. 12.5 amp C. 25 amp D. 975 amp
Last Answer : Answer: C
Description : As the ahead valve opens as shown in the illustration, pin #5 of the Sensor ______________. EL-0099 A. becomes more negative B. becomes more positive C. approaches neutral point D. approaches ground potential
Last Answer : Answer: B
Description : A bus disconnect link is used to isolate _____________. A. one bus bar from another B. the generator circuit breaker from the bus C. different phases from the equalizer connection D. positive and negative buses from the neutral
Description : The main advantage of sunk key is that it is a _____ drive. a) Positive b) Negative c) Neutral d) None of the listed
Last Answer : a) Positive
Description : Sunk key is a .............. drive. A. Positive B. Negative C. Neutral D. None
Last Answer : A. Positive
Description : Which are more suitable normal form to be used with definite clause? a) Positive literal b) Negative literal c) Generalized modus ponens d) Neutral literal
Last Answer : c) Generalized modus ponens
Description : Which digital data encoding method records a digital one as a positive pulse and a digital (zero) as a negative pulse and returns the tape to neutral between pulses?
Last Answer : Return-to-zero (RZ) encoding.
Description : In liquids and gases the current is due to the motion a. negative charges b. positive charges c. both negative and positive charges d. neutral particles
Last Answer : c. both negative and positive charges
Description : When a semiconductor is doped with a P-type impurity, each impurity atom will (A) acquire negative charge. (B) acquire positive charge. (C) remain electrically neutral. (D) give away one electron.
Last Answer : (A) acquire negative charge.