Question

pls solve this science questions of class 10

Answer 1

1) nerve impulse
4) a) they have high calorific value ( b) low ignition temperature.
5) a) 2,8,1
b) 1st group
c) it is a metal
d) NaCl
6)(a) AG(NO3)2 + KI ---------: AgI2 + KNO3
it is double displacement reaction.
b) KCl3 -----heat-------: KCl + O2
7) In the modern periodic table 18 groups and 7 periods are their........(a) as we go down a group metallic character and atomic size is increases.
b) and from left to right in a period decreases