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how does boiling makes water safe for drinking
kills germs
most metals do not react with alkalis but ,.................., .......................... can react with NaOH, KOH to form salts and H2
Ai, Zn
composition of gun metal is
cu, sn.zn
composition of german silver is
cu,zn,ni
three methods of metallurgy are
concentration, reduction, refining
nature of metal oxide is
basic
most abundant metal on earth surface is
Ai
define ore
mineral from which metal extracted profitably
...............non metal used in fertilizer
nitrogen
DURING ADOLESCENCE SIZE OF HEART CHANGES TO
50% INCREASE
incubation period in hen is..........................days
21
.......non metal .use in antiseptic
iodine
genetic combination of sperm is
22+x or 22+y
testis are present in sac called as.....................................
scrotum
site of fertilization is
oviduct
budding occurs in
hydra , yeast
GROWTH HORMONE SECRETED FROM
PITUITARY
DURATION OF MENSTRUAL CYCLE ON AN AVG IS
28
multiple fission occurs in
plasmodium
CHEMICAL NEEDED FOR THYROXINE SECRETION
IODINE
composition of duralumin
al,mg,mn