Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 General Science Chemistry Classification of Elements and Periodicity in Properties
For metals and non-metals consider the following statement and select the correct statements:
(i) Out of known elements about 75% or more are metals.
(ii) Sodium metal is very reactive therefore it is stored in water.
(iii) Phosphorus is very reactive non-metal therefore to prevent non-metal therefore to prevent it from atmospheric oxygen it is stored in water
(iv) Non-metals are used in fertilizers and crackers.
1
(ii), (iii) & (iv)
2
(i), (iii) & (iv)
3
(iii) & (iv)
4
All statements are correct