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define metalloid
Indicate the nature of bonding in CCl 4 and CaH 2 : (1) Covalent in Ccl 4 and electrovalent in Cah 2 (2) Electrovalent in both CCl and CaH 2 (3) Covalent in bot
What are the main sources of electrical resistance in a metal? The factors which affect electrical resistance of a metal are impurity, temperature and alloying. Free mean path o
What is Allotropy If the change in structure is reversible then the polymorphism is called as 'allotropy'.Allotropy (Gr. allos, other, and tropos, manner) is a behavior exhibi
Methane (CH4), or natural gas, is commonly used all over the world as a source of energy and fuel. Many homes in the United States combust methane to generate heat for hot water he
balance the equation
Q) Inside the sun four hydrogen nuclei combine to form a helium nucleus by which cycle? Ans) Proton-proton cycle.
what is surface chemistry?
The number of unpaired electrons in a chromic ion Cr 3+ (atomic number = 24) is: (1) 6 (2) 4 (3) 3 (4) 1 Ans: 3
how to make assignmant//
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