Question

11. Physical state of carbon is
A) liquid
B) Solid
C) gas
D) none


12. Neutralisation reaction occurs when acid reacts with
A) base
B) water
C) salt
D) complex salt


13. When CuO reacts with H2 gas, CuO is
A) Oxidised
B) reduced
C) neither oxidises nor reduces
D) both


14. When H2 gas reacts with N2 gas, the new gas formed is
A) NO2
B) ammonia
C) HCl
D) O2


15. Calcium Carbonate on heating gives
A) O2 gas
B) H2 gas
D) Ca


16. Methane reacts with O2 forming CO2 and water. This is an example of
A) decomposition reaction
B) exothermic reaction
C) endothermic reaction
D) Combination reaction


17. FeSO4 on heating gives
A) 2. gases
B) 1 gas
C) 3. gases
D) 4. gases


18. The reaction which takes place in presence of sunlight are called
A) neutralisation reaction
B) photochemical reaction
C) Electrolysis
D) Redox reactions


19. When lead nitrate is heated
A) combination reaction takes place
B) decomposition reaction takes place
C) displacement reaction takes place
D) precipitation reaction takes place


20. Substance used for white washing the wall is
A) methane
B) Slaked lime
C) CuO
D) ammonia​

Answer 1

Answer:

11. solid

12. base

13. oxidised

14. 3H2 + N2 → 2NH3

15. calcium oxide

17. 3gases

18. photochemical reaction

19. decomposition reaction takes place

20. CaO

pls mark me as BRAINIEST

sorry dear I don't know 16th question