(b) Iron is a transition element.(i) Which two of the following statements about iron are correct?Tick two boxes. A freshly-cut surface of iron is green in colour.Iron exists in only one oxidation state in its compounds.Iron has a high density.Iron has a giant covalent structure.Iron ...
II . Decide which of the following sentences in each group is right. You should mark "√" in the brackets before the right sentence, and "X" otherwise.1.我家里有五口人。() There are five people in my family.()There are five people in my families.2.这个盆子是铁做的。( ) This ...
IronGround waterIn aerated soils Fe is present as Fe(III); however, in certain localized environments, Fe(II) will exist. While the complexation of Fe(III) by hydroxamic and other organic acids has been extensively reported, there is little information available concerning Fe(II) complexation. ...
【3】Which of the following is mentioned in the text? A. Fridges will know what people need. B. Jacket sleeves can be used as a guide. C. Cars will be able to drive automatically. D. Nothing can replace the Internet. 【4】What is the text mainly about? A. Future technology in eve...
Which of the following is (are) formed by ozonolysis of the compound below? a) Only I b) Only II c) Only I and II d) I, II, III Ozonolysis: In ozonolysis, the double bonds are cleaved to form C=O bonds. Each double-bonded ...
(b)Iron reacts with hydrochloric acid to form iron(II) chloride and a gas which 'pops' with a lighted splint.(i) Identify this gas.[1] (ii) Suggest a practical method for investigating the rate of this reaction involving collection of the gas.You may include a labelled diagram in you...
Given the reaction below, which of the following bonds is stronger: Heme-O{eq}_{2} {/eq} or Heme-CO? Heme-O{eq}_{2}\rightarrow {/eq} Heme-CO + O{eq}_{2} {/eq} Coordination Complex: A dative bond is a type of covalent bond in which ...
To determine in which of the given processes colloidal sulfur is formed, we will analyze each reaction step by step. Step 1: Analyze the first reaction Reaction:FeCl2 + H2S → FeS + 2HCl - In this reaction, iron(II) chloride reacts with hydrogen sulfide to form iron(II) sulfide and hyd...
Knowledge Check Which of the following is/are Doeberiners triad (i) P, As, Sb (ii) Cu, Ag, Au (iii) Fe, Co, Ni (iv) S, Se, Te Correct answer is A(i) and (ii) B(ii) and (iii) C(i) and (iv) DAllSubmit
原文在第四段中提及“IBM was also usingthe campaign to align employees around the idea of the Internet as the future oftechnology.The internal campaign changed the way employees thought about everything they did.itgave employees a sense of direction and purpose.”,这一切都在说明 IBM的广告营销...