Question

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Answer 1

Explanation:

1. According to ohm's law current flowing in a conductor is directly proportional to potential difference across the ends of the conductor.

V ∞ I

V = IR

• Resistance R = 6 ohm
• Current I = 20 A
• Potential Difference V = ?

V = IR = 6 × 20 = 120 Volt

2. a) 2 Na + H2O -------> 2 NaOH

b) N2 + 3 H2 -------> 2 NH3

c) CaCO3 ---------> CaO + CO2

3. Conducting Tissue in plants are Xylem and Phloem. They help in transportation of water, minerals snd food respectively

4. a. Aerobic Respiration

• It take place in presence of oxygen.
• Complete break down glucose take place.
• It take place in mitochondria and cytoplasm.
• More energy is released.

Anaerobic Respiration

• it take place in absence of oxygen.
• incomplete break down of glucose take place.
• it take only in mitochondria.
• Less energy is released.

b. Respiratory centre of the cell is mitochondria.