NEET General 4 — Questions and Answers
Question 1: In a series circuit with resistors of 4 Ω and 6 Ω connected to a 20 V battery, what is the current through the circuit?
- 1 A
- 2 A (Correct answer)
- 3 A
- 5 A
Correct answer: 2 A
Total resistance = 4 + 6 = 10 Ω; using Ohm's law, I = V/R = 20/10 = 2 A.
Question 2: What is the process by which plants lose water vapor through their leaves?
- Transpiration (Correct answer)
- Respiration
- Evaporation
- Osmosis
Correct answer: Transpiration
Transpiration is the loss of water vapor from plant surfaces, primarily through stomata in the leaves.
Question 3: Which of the following has the highest electronegativity?
- Oxygen
- Nitrogen
- Chlorine
- Fluorine (Correct answer)
Correct answer: Fluorine
Fluorine has the highest electronegativity value of 3.98 on the Pauling scale, making it the most electronegative element.
Question 4: Which type of muscle tissue is both striated and involuntary?
- Smooth muscle
- Cardiac muscle (Correct answer)
- Skeletal muscle
- Visceral muscle
Correct answer: Cardiac muscle
Cardiac muscle is striated like skeletal muscle but is involuntary, being controlled by the autonomic nervous system.
Question 5: What is the value of the universal gas constant R?
- 6.022 J/mol·K
- 8.314 J/mol·K (Correct answer)
- 1.38 J/mol·K
- 0.082 J/mol·K
Correct answer: 8.314 J/mol·K
The universal gas constant R = 8.314 J/mol·K, used in the ideal gas law PV = nRT.
Question 6: Which structure in the kidney is responsible for filtration of blood?
- Loop of Henle
- Glomerulus (Correct answer)
- Collecting duct
- Distal convoluted tubule
Correct answer: Glomerulus
The glomerulus is a capillary tuft within Bowman's capsule where blood is filtered under pressure to form the filtrate.
Question 7: Which of the following reactions is an example of a disproportionation reaction?
- 2H₂ + O₂ → 2H₂O
- Cl₂ + 2NaOH → NaCl + NaOCl + H₂O (Correct answer)
- Na + H₂O → NaOH + ½H₂
- CaCO₃ → CaO + CO₂
Correct answer: Cl₂ + 2NaOH → NaCl + NaOCl + H₂O
In this reaction, Cl₂ is simultaneously oxidized (to OCl⁻) and reduced (to Cl⁻), a defining feature of disproportionation.
NEET General 4
In a series circuit with resistors of 4 Ω and 6 Ω connected to a 20 V battery, what is the current through the circuit?