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An atom with atomic number 20 is most likely to combine chemically with the atom whose atomic number is:
(1) 11
(2) 14
(3) 16
(4) 10
Ans: 16
Q. in radioactive decay, a nucleus emits an alpha particle and two beta particle successively. show that the final nucleus is an isotope of original nucleus. Ans: Let the mass and
What is vulcanization The process of vulcanization was discovered by Charles Good Year in 1839. He found that when natural rubber is heated with sulphur, its tensile strength,
Q. What do you mean by Permissible level ? To regulate and enforce safety about the use of these synthetic colours and dyes PFA, 1954 has covered their use in part IV comprisin
1. Air is available at 70°F and humidity of 0.001lb/lb. It is to be treated to yield 130°F and 70% humidity. Offer a reasonable design. 2. A mix of granular ceramic
pprocessof j ``
In the transition of Zn atoms to Zn ++ ions there is a decrease in the: (1) Number of valency electrons (2) Atomic weight (3) Atomic number (4) Equivalent weight A
Classification of carbon molecules in organic compounds The carbon atoms in an alkane molecule may be categorized into four types namely Primary (1 o ), Secondary (2 o ),
Q. Illustrate about Borohydrides? Borohydrides like NaBH 4 ,, Be(BH 4 ,) 2 and Al(BH 4 )are the salts of complex tetrahydridoborate anion, BH - 4 ,. Since in BH - 4 ,. bor
what is 1 u equal to ?
How can in understand cosy
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