hydrogen and

Question 1

dil acid + metal placed above H2 in electro chemial series release which gas

Answer 1

H2

Question 2

amphoteric metals + steong base ( NAOH / KOH )

Answer 2

h2

Question 3

tempary hardening

Answer 3

CA(HCO3) / Mg(HCO3)

Question 4

PARMANENT HARDENING

Answer 4

CA(SO4) /MG(SO4) CAcl2/ Mgcl2

Question 5

halides

Answer 5

Be/Mg halides (hydrogen contaning compound ) covalent rest all sblock halides ionic

Question 6

tempary hardening can be removed by

Answer 6

boling , soak lime ( ca(oh)2 )

Question 7

PARMANENT HARDENING can be removed by

Answer 7

na2co3 washing soda calcogen NA2 (NA4( PO4 ) 2)

Question 8

TREATING PARMANENT HARDENING tempary hardening CONVERT SOLUBLE IMPURITIES INTO INSOLUBLE IMPURITIES LIKE

Answer 8

CACO3 INSOLUBLE mg (OH)2

Question 9

H2O2 REDUCINg

Answer 9

h2o2 ——–o2 Ag20 =Ag o3 = o2 I2 = i-2

Question 10

h2o2 OXIDIsing

Answer 10

h2o2——-h20 s=so4-2 fe+2 = fe+3 no2- =no3-

Question 11

mg(HCO3) + SODA

Answer 11

MG( OH)

Question 12

HYPER CONJUGATION IS SHOWN BY

Answer 12

CARBOCATION DOUBLE BOND FREE RADICAL

Question 13

"Type of reproduction without multiplication" is
consider as ?
(1) Zoospore formation
(2) Conidia formation
(3) Binary fission
(4) Endospore formaion

Answer 13

4

Question 14

Which one is longest stage of cell cycle :-

(1) M-phase
(2) G1 -phase
(3) G2 -phase
(4) S-phase

Answer 14

2

Question 15

Fehling solution is used for the detection of :-

(1) Glucose
(2) Starch
(3) Fat
(4) All of these

Answer 15

1