Question

UR
1
1
In the formula Na,C03.10H,O, What does 10H,0 signify? What is the
chemical name of Na,CO3.10H,0?
10. Draw field lines of a magnetic field around a straight conducting wire.
11. Iron articles get coated with a reddish brown powder when left for some
time. What is the process known as?
OR
A student takes 2g of barium hydroxide and 1 g of ammonium chloride in a
test tube and mixes with the help of a glass rod. After that he/she touches
the bottom of the test tube with his/her palm. What type of reaction is it -
exothermic or endothermic? Give one more example of such type of reaction.
12. Complete the following ray diagram and mark angle of incidence and angle
of reflection.
P
0+
F
​

Answer 1

Answer:

विधानें के सामने या असत्य लिखिए

Explanation:

बिल्ल की इसी ने बनाई है