Lithium ion batteries are now commonly used in rechargeable consumer electronic devices. The main reason lithium is used in these devices is because :A. lithium has a lower electronegativity than nickel in common nickel-cadmium batteriesB. lithium batteries are not as toxic as common alkaline batteriesC. lithium batteries have a reduced risk of leakage of chemicalsD. lithium batteries achieve a greater amount of energy stored per unit mass than other common batteries

Lithium ion batteries are now commonly used in rechargeable consumer e

1.	Lithium ion batteries are now commonly used in rechargeable consumer electronic devices. The main reason lithium is used in these devices is because :A. lithium has a lower electronegativity than nickel in common nickel-cadmium batteriesB. lithium batteries are not as toxic as common alkaline batteriesC. lithium batteries have a reduced risk of leakage of chemicalsD. lithium batteries achieve a greater amount of energy stored per unit mass than other common batteries
Answer» Correct Answer - D

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A Typical characteristic of the representative element is that the first member of each group gives different present in that group. Lithium is no excepton. Through it is the first member of the alkali metal family (group f), it is anomalous in behaviour. This may be attributed to the small size of both Li and `Li^(+)` ion, high ionisation enthalpy, high polarising power, and non- availability of d-electrons in its valence shell. Which of the following ions has the lowest mobility in aqueous solution ?A. `Li^(+)`B. `Na^(+)`C. `K^(+)`D. `Cs^(+)`
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`{:(,"COLUMN-I","COLUMN-II"),((A),KHCO_(3) ,(P)"Exists in solid state"),((B),NaHCO_(3),(Q)"Soluble in water"),((C),LiHCO_(3),(R)"Hydrogen bonding"),((D),NH_(4)HCO_(3),(S)"Dimeric anion"):}`A. A-Q,B-PR,C-P,D-SB. A-PQRS,B-PQR,C-Q,D-PC. A-PQ,B-S,C-P,D-RSD. A-P,B-PS,C-R,D-Q
Number of `HCO_(3)` ions joined by Hydrogen bonding in `KHCO_(3)` is :
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