NEET

NEET  Chemistry is the scoring paper in the medical entrance examination. Here, you will discover the NEET Chemistry MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Chemistry objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Chemistry Soil Pollution Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQs on Soil Pollution

1. Which of the following serves as an indicator of atmospheric pollution?
(a) fern
(b) liverworts
(c) hornworts
(d) epiphytic lichens

Answer

Answer: (d)

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2. In 1984, the Bhopal gas tragedy took place because methyl isocyanate
(a) reacted with ammonia
(b) reacted with water
(c) reacted with DDT
(d) reacted with CO₂

Answer

Answer: (b)

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3. Negative soil pollution is
(a) reduction in soil productivity due to erosion and overuse
(b) reduction in soil productivity due to addition of pesticides and industrial wastes
(c) converting fertile land into harden land by dumping ash, sludge and garbage
(d) None of the above

Answer

Answer: (a)

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4. Air pollution that occurs in sunlight is
(a) reducing smog
(b) acid rain
(c) oxidizing smog
(d) fog

Answer

Answer: (c)

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5. The layer of atmosphere between 10km to 50km above the sea level is called as
(a) troposphere
(b) thermosphere
(c) stratosphere
(d) mesosphere

Answer

Answer: (c)

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6. The concentration of dissolved oxygen in cold water can go up to
(a) 14 ppm
(b) 8 ppm
(c) 10 ppm
(d) 16 ppm

Answer

Answer: (c)

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7. The quantity of DDT at each trophic level in the food chain
(a) decreases
(b) remains the same
(c) increases
(d) changes

Answer

Answer: (c)

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8. Formation of London smog takes place in
(a) winter during day time
(b) summer during day time
(c) summer during morning time
(d) winter during morning time

Answer

Answer: (d)

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9. Brewery and sugar factory waste alter the quality of a water body by increasing
(a) temperature
(b) turbidity
(c) pH
(d) COD and BOD

Answer

Answer: (d)

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10. In a coal-fired power plant electrostatic precipitators are installed to control the emission of
(a) SO₂
(b) NO₂
(c) SPM
(d) CO

Answer

Answer: (c)

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NEET  Physics is the scoring paper in the medical entrance examination. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Physics Addition and Subtraction of Vectors Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQ on Addition and Subtraction of Vectors

1. At what angle should the two force vectors 5N and 12 N be added to get a resultant vector of 13 N?
(a) 0°
(b) 30°
(c) 90°
(d) 180°

Answer

Answer: (c) 90°

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2. If the sum of two unit vectors is 1, then what is the difference between them?
(a) \(\frac { 1 }{ \sqrt { 2 } } \)
(b) √2
(c) √3
(d) √4

Answer

Answer: (c) √3

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3. What is the net force on the particle if it is simultaneously acted upon by two forces 4 N and 3 N?
(a) 1 N
(b) 7 N
(c) 21 N
(d) Between 7 N and 1 N

Answer

Answer: (d) Between 7 N and 1 N

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4. If the magnitude of the resultant force of two forces is lesser than the magnitude of the larger force, then
(a) The two forces are perpendicular to each other
(b) They two forces in opposite directions
(c) The forces are different in magnitude and direction
(d) The forces possess small magnitude

Answer

Answer: (b) The two forces are in opposite directions

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5. Two forces \(\overrightarrow { { F }_{ 1 } } \) and \(\overrightarrow { { F }_{ 2 } } \) that are perpendicular to each other act on a point mass. The resultant force in the point mass is given by
(a) F₁=F₂
(b) F₁−F₂
(c) \({ F }_{ 1 }^{ 2 }+{ F }_{ 2 }^{ 2 }\)
(d) \(\sqrt { { F }_{ 1 }^{ 2 }+{ F }_{ 2 }^{ 2 } } \)

Answer

Answer: \(\sqrt { { F }_{ 1 }^{ 2 }+{ F }_{ 2 }^{ 2 } } \)

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6. If \(\left| \overrightarrow { A } -\overrightarrow { B } \right| =\left| \overrightarrow { A } \right| =\left| \overrightarrow { B } \right| \), then what is the angle between \(\overrightarrow { A } \) and \(\overrightarrow { b } \) ??
(a) 0°
(b) 30°
(c) 60°
(d) 90°

Answer

Answer: (c) 60°

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7. Which of the following is true for the given diagram?

Answer

Answer: (b) \(\overrightarrow { C } +\overrightarrow { A } =\overrightarrow { B } \)

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8. If three vectors A, B and C have magnitudes 5, 12 and 13 and \(\overrightarrow { A } +\overrightarrow { B } =\overrightarrow { C } \), then what is the angle between B and C?

Answer

Answer: (a) \(\cos ^{ -1 }{ \frac { 12 }{ 13 } } \)

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9. Two forces F₁ and F₂ act on a body. One of the forces is double of the other force. The resultant of these forces is equal to the larger force. What is the angle between the forces?

Answer

Answer: (d) \(\cos ^{ -1 }{ -\frac { 1 }{ 4 } } \)

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10. A person travels 10 km North and 20 km East. What will be the displacement from the initial point?
(a) 20 km
(b) 22.36 km
(c) 30 km
(d) 32.36 km

Answer

Answer: (b) 22.36 km

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NEET  Physics is the scoring paper in the medical entrance examination. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Physics Moving Coil Galvanometer Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQ on Moving Coil Galvanometer

1. The deflection θ is related to the electric current I in a galvanometer by the relation
(a) I ∝ θ
(b) I ∝ tan θ
(c) I ∝ sin θ
(d) I ∝ cos θ

Answer

Answer: (a) I ∝ θ

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2. A moving coil galvanometer carries a current I and the magnetic field B is radial. The coil has N number of turns and an effective area A. The torque acting on the coil of a moving coil galvanometer is given by
(a) NA²B²I
(b) NABI²
(c) NABI
(d) N²ABI

Answer

Answer: (c) NABI

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3. The sensitivity of a moving coil galvanometer can be increased by decreasing
(a) The number of turns in the coil
(b) The area of the coil
(c) The magnetic field
(d) The couple per unit twist of the suspension

Answer

Answer: (d) The couple per unit twist of the suspension

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4. In ballistic galvanometer, the frame on which the coil is wound is non-metallic. It is
(a) To avoid the production of induced e.m.f
(b) To avoid the production of eddy currents
(c) To increase the production of eddy currents
(d) To increase the production of induced e.m.f

Answer

Answer: (b) To avoid the production of eddy currents

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5. The reason the coil is bound over the metallic frame in moving coil galvanometer is
(a) The metallic frame helps in oscillation
(b) The metallic frame helps in making steady deflection without any oscillation
(c) The metallic frame increases the magnetic field
(d) None of the above

Answer

Answer: (b) The metallic frame helps in making steady deflection without any oscillation

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6. The deflection in moving coil galvanometer is
(a) Inversely proportional to the area of the coil
(b) Directly proportional to the torsional constant
(c) inversely proportional to the current flowing
(d) Directly proportional to the number of turns of the coil

Answer

Answer: (d) Directly proportional to the number of turns of the coil

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7. The pole pieces of the magnet used in a pivoted coil galvanometer are
(a) Plane surfaces of a horse-shoe magnet
(b) Cylindrical surfaces of a bar magnet
(c) Plane surfaces of a bar magnet
(d) Cylindrical surfaces of a horse-shoe magnet

Answer

Answer: (d) Cylindrical surfaces of a horse-shoe magnet

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8. A current-carrying rectangular coil placed in a uniform magnetic field. In which orientation will the coil rotate?
(a) In any orientation
(b) The magnetic field is parallel to the plane of the coil
(c) The magnetic field is at 45⁰ with the plane of the coil
(d) The magnetic field is perpendicular to the plane

Answer

Answer: (d) The magnetic field is perpendicular to the plane

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9. What is the shape of a magnet in moving coil galvanometer to make the radial magnetic field?
(a) Convex cylindrical magnet
(b) Horse-shoe magnet
(c) Concave cylindrical magnet
(d) None

Answer

Answer: (c) Concave cylindrical magnet

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10. Phospher- bronze wire is used in suspension because it has
(a) A large couple per unit twist
(b) A small couple per unit twist
(c) Low conductivity
(d) High Sensitivity

Answer

Answer: (b) A small couple per unit twist

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NEET  Chemistry is the scoring paper in the medical entrance examination. Here, you will discover the NEET Chemistry MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Chemistry objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Chemistry Cell Constant and Electrochemical Cells Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQs on Cell Constant and Electrochemical Cells

1. Oxygen has a +2 oxidation state in
(a) H₂O
(b) H₂O₂
(c) F₂O
(d) SO₂

Answer

Answer: (c)

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2. Which of the following is the strongest reducing agent?
(a) Li
(b) Na
(c) Mg
(d) Ca

Answer

Answer: (a)

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3. When the salt bridge is removed from a cell, its voltage
(a) will increase
(b) will decrease to half
(c) will decrease to zero
(d) will not change

Answer

Answer: (c)

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4. When a dilute solution of H₂SO₄ is electrolysed using a platinum electrode, at anode the gas evolved is
(a) SO₃
(b) SO₂
(c) H₂
(d) O₂

Answer

Answer: (d)

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5. The oxidation number of sulphur in Caro’s acid is
(a) +4
(b) +5
(c) +6
(d) +8

Answer

Answer: (c)

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6. Which of the following is the most powerful reducing agent?
(a) H₂S
(b) H₂SO₃
(c) SnCl₂
(d) HNO₂

Answer

Answer: (a)

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7. Which of the following substances can act as both oxidising and reducing agent?
(a) KMnO₄
(b) K₂Cr₂O₇
(c) HNO₃
(d) H₂O₂

Answer

Answer: (d)

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8. Electrolytes conduct electric current
(a) by the movement of ions
(b) by the movement of atoms
(c) by the movement of molecules
(d) by the movement of electrons from the cathode to anode

Answer

Answer: (d)

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9. The reductant may be defined as a substance, whose oxidation no of the atom
(a) increases
(b) decreases
(c) remains constant
(d) may increases or decreases

Answer

Answer: (a)

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10. Which of the following is not an example of an oxidizing agent?
(a) hydrogen peroxide
(b) potassium dichromate
(c) nitric acid
(d) hydrogen sulphide

Answer

Answer: (d)

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11. The conductance in electrolyte conductors is due to
(a) Either movement of electrons or ions
(b) The flow of free mobile electrons
(c) Movement of ions
(d) None of the above

Answer

Answer: (c)

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12. The cell constant of a conductivity cell
(a) Changes with a change of concentration of electrolyte
(b) Remains constant for a cell
(c) changes with a change of electrolyte
(d) changes with change in temperature

Answer

Answer: (b)

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NEET  Chemistry is the scoring paper in the medical entrance examination. Here, you will discover the NEET Chemistry MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Chemistry objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Chemistry Corrosion Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQs on Corrosion

1. Which of the following methods is not used for the prevention of corrosion?
(a) greasing
(b) painting
(c) plating
(d) Heating

Answer

Answer: (d)

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2. Widening of a river valley takes place due to
(a) corrosion
(b) lateral erosion
(c) corrasion
(d) hydraulic action

Answer

Answer: (b)

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3. Elements which have properties of metals and nonmetals are
(a) amorphous
(b) crystalline
(c) metalloids
(d) metals

Answer

Answer: (c)

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4. Corrosion can be prevented by
(a) alloying
(b) tinning
(c) galvanizing
(d) all of the above

Answer

Answer: (d)

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5. Galvanic cells are also named as
(a) electrolytic cells
(b) battery cells
(c) daniel cells
(d) john cells

Answer

Answer: (a)

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6. Voltaic cells generate electricity by
(a) spontaneous redox reaction
(b) non spontaneous redox reaction
(c) sublimation reaction
(d) thermochemical reaction

Answer

Answer: (a)

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7. Galvanization is a method to
(a) protect the iron metal from corrosion
(b) extract iron from its ore
(c) protect food from rancidity
(d) improve the ductility property of the metal

Answer

Answer: (a)

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8. Rusting of iron could take place in
(a) distilled water
(b) ordinary water
(c) distilled and ordinary water
(d) none of the above

Answer

Answer: (c)

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9. Which of the following non-metals is liquid at the room temperature?
(a) iodine
(b) bromine
(c) carbon
(d) sulphur

Answer

Answer: (b)

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10. During roasting which of the following poisonous gas is mainly produced
(a) CO
(b) CO₂
(c) SO₂
(d) N₂O

Answer

Answer: (c)

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NEET  Physics is the scoring paper in the medical entrance examination. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Physics Zener Diode Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQs on Zener Diode

1. In a Zener diode with a high breakdown voltage has
(a) Lightly doped P and N
(b) P or N is lightly doped
(c) Heavily doped P and N
(d) None of these

Answer

Answer: (a) Lightly doped P and N

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2. In Zener diode, the Zener breakdown takes place
(a) Below 6 V
(b) At 6 V
(c) Above 6 V
(d) None of the above

Answer

Answer: (a) Below 6 V

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3. Which of the following controls the current in a Zener diode?
(a) Zener diode resistance
(b) Potential barrier
(c) Reverse bias voltage
(d) External circuits

Answer

Answer: (d) External circuits

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4. A Zener diode when biased correctly
(a) a. Never overheats
(b) b. Has a constant voltage across it
(c) c. Acts as a fixed resistance
(d) d. Has a constant current passing through it

Answer

Answer: (c) Has a constant voltage across it

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5. In Zener diode, the breakdown is due to Zener, has a doping
(a) Lowest
(b) Moderate
(c) High
(d) Low

Answer

Answer: (c) High

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6. In a Zener diode
(a) Negative resistance characteristic exists
(b) Forward voltage rating is high
(c) Sharp breakdown occurs at a low reverse voltage
(d) All of the above

Answer

Answer: (c) Sharp breakdown occurs at a low reverse voltage

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7. A Zener diode, having breakdown voltage equal to 15 V, is used in a voltage regulator circuit shown in the figure. The current through the diode is

(a) 10 mA
(b) 15 mA
(c) 20 mA
(d) 5 mA

Answer

Answer: (d) 5 mA

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8. How is the breakdown region set during the manufacturing of the diode?
(a) By controlling the size of the diode
(b) By controlling the doping of the diode
(c) By managing the biasing of diode
(d) All the above

Answer

Answer: (a) By controlling the doping of the diode

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9. Depletion region behaves as
(a) Semiconductor
(b) Insulator
(c) Conductor
(d) High resistance

Answer

Answer: (B) Insulator

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10. Depletion region contains
(a) Free holes
(b) Free electrons
(c) Immobile charge carriers
(d) All of the above

Answer

Answer: (c) Immobile charge carriers

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