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Q. Explain Dalton’s atomic theory?
The atomic theory In 1808 John Dalton projected a theory to explain the laws of conservation of matter definite proportions and multiple proportions. Dalton's atomic theory base on experimental results held that matter consists of atoms that all atoms of an element are alike and that atoms of one element differ from atoms of other elements. Further the theory proposed that atoms were indestructible and only were rearranged during chemical reactions.
Which of the following has maximum number of unpaired electron (atomic number of Fe 26): (1) Fe (2) Fe (II) (3) Fe (III) (4) Fe (IV) An
Q. Determine the fat content in the given sample of milk? After undertaking this activity, you will be able to: • explain the technique of determination of the total fat c
what is addition,substitution,rearrangement,elimination reactions?
The sulphate of a metal has the formula M 2 (SO 4 ) 3 . The formula for its phosphate will be: (1) M(HPO 4 ) 2 (2) M 3 (PO
color formation of d-block elements
Leibermann nitro test why we add concentrated acid
Q. Describe about groups or families in periodic table? Every element may be represented by a one or two letter symbol. In the middle of nineteenth century a Russian chemist Dm
A first order reaction takes 69.3 minutes for 50% completion. Set up an equation for determining the time needed for 80% completion of this reaction.
1. Of, relating to, or formed at the lowest possible temperature of solidification for any mixture of specified constituents. Used especially of an alloy whose melting point is low
decomposition of carbonates
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