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L −2 M −1 T 3 I 2: scalar Electrical conductivity: σ: Measure of a material's ability to conduct an electric current S/m L −3 M −1 T 3 I 2: scalar Electric potential: φ: Energy required to move a unit charge through an electric field from a reference point volt (V = J/C) L 2 M T −3 I −1: extensive, scalar Electrical resistance: R
For example, the methylation of benzene (C 6 H 6), through a Friedel–Crafts reaction using AlCl 3 as a catalyst, may produce singly methylated (C 6 H 5 CH 3), doubly methylated (C 6 H 4 (CH 3) 2), or still more highly methylated (C 6 H 6−n (CH 3) n) products, as shown in the following example, C 6 H 6 + CH 3 Cl → C 6 H 5 CH 3 + HCl C 6 H ...
It was established in 1958. [5] Over 2750 schools in India and abroad are affiliated to the CISCE. [2] It is also recognized as a 'Non-Governmental National Board of Secondary Education'. [6] CISCE conducts ICSE exam for Class 10 and ISC exam for Class 12.
The ICSE Examination is a school examination and the standard of the examination pre-supposes a school course of ten years duration (Classes I-X). The Indian Certificate of Secondary Education Examination will ensure a general education and all candidates are required to enter for six or more subjects and Socially Useful Productive Work (SUPW). [3]
1.205 883 199 (60) × 10 −5 m 3 ⋅mol −1: 4.9 ... While the values of the physical constants are independent of the system of units in use, each uncertainty as ...
Valence 3 Valence 4 Valence 5 Valence 6 Valence 7 Valence 8 Typical valences 1 (I) NaCl KCl: 1 2 (II) MgCl 2 CaCl 2: 2 13 (III) InBr TlI: BCl 3 AlCl 3 Al 2 O 3: 3 14 (IV) CO PbCl 2: CO 2 CH 4 SiCl 4: 2 and 4 15 (V) NO: NH 3 PH 3 As 2 O 3: NO 2: N 2 O 5 PCl 5: 3 and 5 16 (VI) H 2 O H 2 S SCl 2: SO 2 SF 4: SO 3 SF 6 H 2 SO 4: 2, 4 and 6 17 (VII ...
This notation consists of symbols used for representing operations, unspecified numbers, relations and any other mathematical objects, and then assembling them into expressions and formulas. [94] More precisely, numbers and other mathematical objects are represented by symbols called variables, which are generally Latin or Greek letters, and ...
Arsenic trioxide powder.. Compounds of arsenic resemble in some respects those of phosphorus which occupies the same group (column) of the periodic table.The most common oxidation states for arsenic are: −3 in the arsenides, which are alloy-like intermetallic compounds, +3 in the arsenites, and +5 in the arsenates and most organoarsenic compounds.