Description : When an elemental metal combines with an elemental nonmetal it forms a A covalent compound B binary ionic compound C double salt D polar covalent compound?
Last Answer : Ghh
Description : Define: (a) Radical (b) Valency (c) Molecular formula
Last Answer : (a) Radical: A radical is an atom of an element or a group of atoms of different elements that behaves as a single unit with a positive or negative charge on it. (b) Valency: It is the ... number of atoms of each element present in it. These atoms combine in whole number to form the molecule.
Description : A compound X of the formula `C_(2)H_(6)O` on reaction with Na metal gave Y, X also reacts with `PC1_(5)` to give Z the product obtained in the reactio
Last Answer : A compound X of the formula `C_(2)H_(6)O` on reaction with Na metal gave Y, X also reacts with `PC1_(5)` to ... )H_(5)` D. `C_(2)H_(5)OC_(2)H_(5)`
Description : Which of the following vitamin combines with avid in contained in egg-white forming a compound that cannot be absorbed by the intestine and is therefore, excreted – (1) vitamin B₂ (2) vitamin B₃ (3) vitamin B₇ (4) vitamin A
Last Answer : (3) vitamin B₇
Description : The Grand Unified Theory of the forces of nature combines three of the four forces. Which force is NOT included? w) gravitational x) electromagnetic y) weak nuclear z) strong nuclear
Last Answer : ANSWER: W -- GRAVITATIONAL
Description : Carbon monoxide is a poisonous gas for one of the following reasons. w) it is a powerful acid anhydride x) it combines with the hemoglobin of the blood y) it depletes the dissolved oxygen in the blood by forming carbon dioxide z) it is a strong oxidizing agent
Last Answer : ANSWER: X -- IT COMBINES WITH THE HEMOGLOBIN OF THE BLOOD
Description : Carboxy haemoglobin is formed when haemoglobin combines with a) carbon dioxide b)CFCs c)carbon monoxide d)none of these
Last Answer : a) carbon dioxide
Description : An element X has a mass number 4 and atomic number 2. Write the valency of this element? -Science
Last Answer : Mass number = 4 Atomic number = 2 X is Helium. It has 0 valency and it will not react with any other atom because it has its outer shell filled.
Description : A metal X' acquires a green colour coating on its surface on exposure to air. (i) Identify the metal X' and name the process responsible for this change. (ii)Name and write chemical ... the green coating formed on the metal. (iii) List two important methods to prevent the process. -Chemistry
Last Answer : (i) Metal is copper. The process is corrosion. (ii)Basic copper carbonate [CuCO3.Cu(0H)2]. (iii) • It should be coated with tin • It should be mixed with other metals to form alloys.
Description : Two elemets `X(` atomic weight `=75)` and `Y(` atomic weight `=16)` combine to give a compound having `75.8%` X.` The formula of the compound is
Last Answer : Two elemets `X(` atomic weight `=75)` and `Y(` atomic weight `=16)` combine to give a compound having `75.8%` X.` ... C. `X_(2)Y_(2)` D. `X_(2)Y_(3)`
Last Answer : Two elemets `X(` atomic weight `=75)` and `Y(` atomic weight `=16)` combine to give a compound having `75.8%` X. ... B. `xy_(2)` C. xy D. `x_(3)y_(3)`
Description : Two element X (at. Mass = 75) and Y (at. Mass = 16) combine to give a compound having 75.8% of X. the formula of the compound is :-
Last Answer : Two element X (at. Mass = 75) and Y (at. Mass = 16) combine to give a compound having 75.8% of X. the formula of ... ` C. `X_(2)Y_(2)` D. `X_(2)Y_(3)`
Description : A compound 'X' of the formula `C_(3)H_(8)O` gives iodoform test. On oxidation with acidified `K_(2)Cr_(2)O_(7)X` gave Y. Y also gives iodogorm test. T
Last Answer : A compound 'X' of the formula `C_(3)H_(8)O` gives iodoform test. On oxidation with acidified `K_(2)Cr_(2) ... ` D. `CH_(3)COCH_(3), CH_(3)CHOHCH_(3)`
Description : A compound X with moleuclar formula `C_(3)H_(8)O` can be oxidized to a compoud Y with the molecular formula `C_(3)H_(6)O_(2)`. X is most likely to be
Last Answer : A compound X with moleuclar formula `C_(3)H_(8)O` can be oxidized to a compoud Y with the molecular ... Aldehye B. Alcohol C. Ether D. Both 2 and 3
Description : Which of the following elements would form an acid oxide with the formula XO2 and an acidic compound with hydrogen with the formula XH2? w) Sodium x) Magnesium y) Aluminum z) Sulfur
Last Answer : ANSWER: Z -- SULFUR
Description : Aromatic carbonyl compound having molecular formula `C_(8)H_(8)O` react with `NH_(2)OH` how many oximes can be formed
Last Answer : Aromatic carbonyl compound having molecular formula `C_(8)H_(8)O` react with `NH_(2)OH` how many oximes can be formed A. 8 B. 10 C. 12 D. 6
Description : What is the formula of the compound formed between nitrate and chromium ions?
Last Answer : The chemical formula of chromium nitrate is Cr(NO3)3.
Description : What is the formula of the compound formed between the ions Cr 3plus and CO3 2minus?
Last Answer : Cr2(CO3)3
Description : What is the formula of the compound formed between Magnesium and Chlorine?
Last Answer : The ionic compound formed between magnesium and chlorine has theformula MgCl2.
Description : What is the formula of the compound formed between the ions Co2 plus and PO43-?
Last Answer : The formula is Co3(PO4)2.
Description : What is the ionic compound formula when Na and P are formed?
Last Answer : The ionic sodium phosphide is Na3P.
Description : What is the formula for a compound formed from the elements Al and S?
Last Answer : Al and S combine to form aluminum sulfide, Al2S3
Description : What is the chemical formula for the compound formed between stronium and oxygen?
Last Answer : Strontium oxide is SrO.
Description : What is the formula of the compound formed between magnesium and oxygen? A MgO B Mg2O2 C Mg2O3 D MgO2 E Mg2O
Last Answer : A MgO
Description : What is the formula for the compound that is formed from Sodium and Fluorine?
Last Answer : ANSWER: NaF
Description : Why do Helium, Neon and Argon have a zero valency? -Science
Last Answer : Helium has 2 electrons in its outermost orbit thus filling shell 1 and forming duplet configuration in the valence shell. Neon has 8 electrons in their valence orbit hence completing duplet ... reach stable electron configuration and they will not take part in any sort of chemical reactions.
Description : The valency of silicon is -Science
Last Answer : According to the electronic configuration the valency is +4 or -4 because silicon can either gain 4 electrons or lose 4 electrons because it is a noble gas. Hence valency of silicon is 4
Description : Difference between Valency and Valence electrons ? -Chemistry
Last Answer : 1 ) Valency : The ability to gain, loose and sharing of electrons is valency / combinig capacity atoms of other elements is valency. 2 ) Valence elctrons : Electrons present in the outermost shell of the atom is valence electrons.
Description : An atom has atomic number 12, what is its valency and name the element? -Chemistry 9th
Last Answer : Element with atomic number 12 is Magnesium (Mg). Electronic configuration of magnesium is 1s2 2s2 2p6 3s2. It has 2 e- in its outermost orbit and can donate these to form a stable octet. Hence, its valency is +2.
Description : Define the term valency. What is the valency for magnesium and copper? -Chemistry 9th
Last Answer : The no.of electrons required for the element to be octate or duplate is known as valency. Magnesium = 2 Copper = 1 hope this helps u
Description : Find the valency factor for following bases : `(i) Ca(OH)_(2) " " (ii) CsOH " " (iii) Al(OH)_(3)`
Last Answer : Find the valency factor for following bases : `(i) Ca(OH)_(2) " " (ii) CsOH " " (iii) Al(OH)_(3)`
Description : Find the the valency factor for following acids `(i) CH_(3)CO OH " " (ii) NaH_(2)PO_(4) " " (iii) H_(3)BO_(3)`
Last Answer : Find the the valency factor for following acids `(i) CH_(3)CO OH " " (ii) NaH_(2)PO_(4) " " (iii) H_(3)BO_(3)`
Description : How does valency of an element vary across a period?
Last Answer : How does valency of an element vary across a period?
Description : Find the atomic structure of `._(12)^(24)Mg`. What is its valency?
Last Answer : Find the atomic structure of `._(12)^(24)Mg`. What is its valency?
Description : The valency is zero for
Last Answer : The valency is zero for A. Neon B. Fluorine C. Oxygen D. Carbon
Description : What is the name of the family of reactive metals having valency two?
Last Answer : What is the name of the family of reactive metals having valency two?
Description : What is the name of the family of reactive metals having valency one?
Last Answer : What is the name of the family of reactive metals having valency one?
Description : What the valency of bicarbonate is?
Last Answer : The charge of ion bicarbonate, HCO3 (not valency) is -1.
Description : What is the valency of fluorine in calcium fluoride?
Last Answer : 1. This is answerI have another question to ask youWhat is the valency of calcium in calcium flouridePlease can you answer to my question
Description : Why the valency of an element is a whole number?
Last Answer : Because there is no such thing as a fraction of an electron.
Description : Tyrosine of thyroglobulin is acted upon by ________ to give mono and diiodo tyrosines. (A) Potassium Iodide (B) Iodine (C) Iodide I (D) Higher valency state of iodine (I+)
Last Answer : Answer : D
Description : The cause of periodicity of properties (a) Increasing atomic radius (b) Increasing atomic weights (c) Number of electrons in the valency orbit (d) The recurrence of similar outer electronic configuration
Last Answer : Ans:(d)
Description : The valency of carbon is
Last Answer : four.
Description : Why do inert gases have zero valency?
Last Answer : Inert gases have zero valency because their octet is complete.
Description : The two elements required to form substitutional solid solution should not have (A) Same crystalline structure (B) Same valency (C) Widely differing electronegativity (D) Same atomic sizes
Last Answer : C) Widely differing electronegativity
Description : Why chlorine is electronegative? What type of valency it will show with hydrogen.
Last Answer : Chlorine gains one electron from another atom so as to complete its octet therefore chlorine is electronegative. Type of valency with hydrogen : Co-valency.
Description : Define valency. Write their types.
Last Answer : Valency:- The number of electrons donated (lose) or accepted (gain) or shared by atom of an element in order to complete its octet & attain stability is called as Valency. Types of Valency : 1. Electro valency 2. Co valency 3. Co-ordinate valency
Description : Define: i) Valency ii) Valence electrons.
Last Answer : Valency:- The number of electrons donated (lose) or accepted (gain) or shared by atom of an element in order to complete its octet & attain stability is called as Valency. Valence electrons: ... in the outermost orbit of an atom determine the valency of an atom and hence called valence electrons.
Description : A compound X' on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound Y'. X' also reacts with sodium metal to evolve a colourless gas Z'. Identify X', Y' ... the chemical reaction of formation of Y' and also write the role of sulphuric acid in the reaction. -Science
Last Answer : X-Ethanol/ (C2H5OH)/Ethyl AlcoholY- Ethene / (C2H4)Z- Hydrogen/ (H2)Role of sulphuric acid - dehydrating agent