'Colourless gas' diaporamas de présentation

W507 Overview of health effects

W507 Overview of health effects. Overview of health effects of selected substances. Gases Organic solvents and vapours Other selected organic liquids Metals and metal compounds Dusts and particulate materials Mineral fibres. Gases. Gases may be grouped as: simple asphyxiants

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Towards a smokefree Europe

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Q1 Describe briefly how rocks are weathered?

Q1 Describe briefly how rocks are weathered?. Ans: By physical weathering and Chemical weathering. Q2 Which of the following substance can sublimes to form vapour on heating? a) Stone b) Ice c) Iodine solid d) Glass Ans: c. Q3 Describe the steps of fractional distillation.

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ACIDS, BASES AND SALTS A guide for A level students

ACIDS, BASES AND SALTS A guide for A level students. 2008 SPECIFICATIONS. KNOCKHARDY PUBLISHING. KNOCKHARDY PUBLISHING. ACIDS, BASES AND SALTS. INTRODUCTION

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Periodic Relationship among the Oxides of the Elements Li to Cl

Periodic Relationship among the Oxides of the Elements Li to Cl. Ch. 39 Periodicity in Nature of Bonding of Oxides (p.19). The oxides of Periods 2 and 3 elements can be grouped into 3 types according to the nature of their bonding:. 1. Ionic oxides ;

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Sulphur and its Compounds

Sulphur and its Compounds. Chapter 42. General properties. Group VIA (1s 2 2s 2 2p 6 3s 2 3p 4 ) m.p. 113 o C, b.p. 445 o C Allotropes: (1) Rhombic sulphur, S 8 (room to 96 o C) (2) Monoclinic sulphur, S 8 (stable btn. 96-119 o C) (3) Plastic sulphur, long polymeric chains.

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Uses of Gases

Uses of Gases. Gas is Compressible. Inflating. Flotation. Storage. Propulsion. Natural Gas. It is drilled from gas fields (fossil fuel: mainly methane) A smell is added to it It is flammable Hazardous to life as it is explosive. Helium. It is colourless, odourless and has no taste.

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