Question

Waves
Q.2 Fill in the blanks:-
1. 1 mole =
particles.
2. Atomicity of C.He is
3. Formula mass unit of ZnO is
4. Discovery of neutron was done by
5. Oxygen atom is having
valency.
6.
is an eg of non-locomotive animal.
7. Bryophyta means
plants.
8. Crops which are grown in winter are called
9. Continous use of fertilizers in an area can
10.
micro nutrients are required by plants.
soil fertility​

Answer 1

Answer:

1.) 6.022×10^23

3.) ZnO = (65+16)u = 81u

4.) James Chadwick

5.) 2

6.) Sycon

7.) The term Bryophyta came up from the word 'Bryon' which means mosses and phyton meaning plants. These are the plants that grow in shady and damp areas and are small in size. They lack vascular tissues. They reproduce through spores instead of producing flowers and seeds. The study of bryophytes is called Bryology.

8.) Rabi Crops

9.) destroy soil fertility

10.) There are 7 essential plant nutrient elements defined as micronutrients [boron (B), zinc (Zn), manganese (Mn), iron (Fe), copper (Cu), molybdenum (Mo), chlorine (Cl)]. They constitute in total less than 1% of the dry weight of most plants.