Question

a. Explain the oxidation and reduction reaction giving examples.
b. Why do wall do not acquire white colour after white wash immediately?
Give few methods to prevent rusting.
C.
ECTION -C (BIOLOGY
(26 MAR
1. Multiple choice questions. Each question contains 1 marks.
a. Green plants get nutrition by which mode?
i. Hetrotropic
ii. Autotropic
iii. Seprophytic
iv. Parasitic
b. The cell surrounding the stomatal pore are called
i. Epidermal Cell
ii. Guard Cell
iii. Subsidiary Cell
iv. Common Cell
c. Stomata opens during
i. Night
ii. Day time
iii. Evening
iv. Dusk
d. Seprophytes take their food by
i. Other Livings​

Answer 1

Answer:

a. Oxidation reaction=when a substance loses electrons or gain oxidation number, or gains oxygen and loses hydrogen.

b. Reduction reaction=when a substance(metal) gain electrones or loses oxidation no.,or gains hydrogen and loses oxygen

eg-fe + o2 ---- fe2 o3

BIOLOGY

A.Autotrophic

B.Guard cells.

C.Day time