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Q. Illustrate Metallic Bonding? Ans. A metal is crystalline because it has a regularly repeating, closely packed structure. In a metal, though, this closely packed structu
Mutation: A mutation is a physical or chemical change which changes the sequence of bases in DNA molecule. Anything which causes mutation is known as mutagen. A mutation conseq
The nucleus of the element 21 E 45 contains: (1) 45 protons and 21 neutrons (2) 21 protons and 24 neutrons (3) 21 protons and 45 neutrons (4) 24 protons and 21 n
Uses of Biodegradable polymers Biodegradable polymers are utilized basically for medical goods like surgical tissue, sutures in enlargement materials or for controlled drug fre
2. A mixture is prepared by adding 25.0 mL of 0.185 M Na3PO4 to 34.0 mL of 0.140 M Ca(NO3)2. (a) What mass of Ca3(PO4)2 will be formed? (b) What will be the concentrations of eac
solubility of s-block elements to flame test
The number of nodal planes in a Px is: (1) One (2) Two (3) Three (4) Zero Ans: One
Physical properties of Alkynes (a) it is a colourless gas. It comprises a garlic odour. The odour is because of existence of impurities of phosphorous and hydrogen sulphide. Th
how long does time take to wash away the colour
The lactone, a cyclic ester, can form an enolate ion, and this ion is alkylated by methyl iodide.
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