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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 Multiplication of Vectors Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQ on Multiplication of Vectors

1. Two vectors \(2 \hat{i}+3 \hat{j}+8 \hat{k}\) and \(4 \hat{j}-4 \hat{j}+\alpha \hat{k}\) are perpendicular to each other. What is the value of α?
(a) ½
(b) -½
(c) 1
(d) -1

2. A force of 50 N acts on a body and displaces it through a distance of 10 meters in a direction making an angle of 60⁰ with the force. What is the work done by the force?
(a) 100 J
(b) 150 J
(c) 200 J
(d) 250 J

3. If the sum of two vectors is perpendicular to the difference between them. The ratio of their magnitude will be
(a) 1
(b) 2
(c) 3
(d) 4

4. If \(\vec{A} \times \vec{B}=\vec{A} \cdot \vec{B}\)  then the angle between A and B will be
(a) π
(b) π/2
(c) π/3
(d) π/4

5. What is the value of \(|\vec{P} \times \vec{Q}| \text { if } \vec{P}=3 \hat{i}+\hat{j}+2 \hat{k} \text { and } \vec{Q}=2 \hat{i}-2 \hat{j}+4 \hat{k} \)?
(a) 8√3
(b) 3√8
(c) 4√3
(d) 3√4

6. If \(\vec{P} \times \vec{Q}=\vec{R}\), then which of the following statements is true?

7. The magnitude of the scalar product of the vectors \(\overrightarrow{V_{1}}=2 \hat{i}+5 \hat{k}\) and \(\overrightarrow{V_{1}}=2 \hat{i}+5 \hat{k}\) is
(a) 20
(b) 36
(c) 24
(d) 34

8. Which of the following statements is true if \(\vec{P}\)  and \(\vec{Q}\) are perpendicular to each other?

9. What is the angle between the vectors \(-2 \hat{i}+3 \hat{j}+\hat{k}\) and \(\hat{i}+2 \hat{j}+-4 \hat{k}\)?
(a) 0°
(b) 25°
(c) 90°
(d) 180°

10. A force \(\vec{F}=5 \hat{i}+6 \hat{i}+4 \hat{k}\) acts on a body and displaces it by \(\vec{S}=6 \hat{i}-5 \hat{\imath}\). What is the work done by the force?
(a) 5 Units
(b) 10 Units
(c) 15 Units
(d) 20 Units

11. What is the area of the parallelogram which represented by vectors \(\vec{P}=2 \hat{i}+3 \hat{j}\) and \(\vec{Q}=i+4 \hat{j}\)?
(a) 5 Units
(b) 10 Units
(c) 15 Units
(d) 20 Units

12. What is the angle between vectors \(\vec{A} \times \vec{B}\) and \(\vec{B} \times \vec{A}\)?
(a) π
(b) 0⁰
(c) π/2
(d) π/4

13. The angle between \(\vec{A}+\vec{B}\) and \(\vec{A} \times \vec{B}\) is
(a) π
(b) π/2
(c) π/4
(d) 0

14. The vectors \(\vec{a}\), \(\vec{b}\) and \(\vec{c}\) satisfy the relation \(\vec{a} \cdot \vec{b}=0\) and \(\vec{a} \cdot \vec{c}=0\). The vector \(\vec{a}\) is parallel to

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

MCQs on Chromosome Structure

1. The least level of chromosome organization is
(a) 30nm fibre
(b) solenoid
(c) nucleosome
(d) none of the above

2. This has the largest number of chromosomes
(a) Pisum sativum
(b) Giant redwood tree
(c) Haplopappus gracilis
(d) Ophioglossum reticulatum

3. A chromosome with a very short arm and a very long arm is referred to as
(a) Metacentric
(b) telocentric
(c) Acrocentric
(d) Sub-metacentric

4. A chromosome is the thickest during
(a) anaphase
(b) prophase
(c) interphase
(d) metaphase

5. The diagrammatic representation of karyotype (morphological representation of chromosomes) of a species is known as
(a) Cladogram
(b) Ecogram
(c) Chromogram
(d) Idiogram

6. If Bb is a gene pair of an individual then the alleles for this gene pair are
(a) A and B
(b) a and A
(c) a and b
(d) b and B

7. Euchromatin
(a) stains lightly
(b) is partially condensed
(c) genetically active chromatin with genes
(d) all of the above

8. The point at which polytene chromosomes appear to be attached together is known as
(a) centriole
(b) centromere
(c) chromomere
(d) chromocenter

9. In which typical stage are Lampbrush chromosomes observed?
(a) meiotic prophase
(b) mitotic metaphase
(c) mitotic prophase
(d) mitotic anaphase

10. Each of the chromosome at the anaphase stage of a bone marrow cell in our body has
(a) one chromatid
(b) two chromatids
(c) several chromatids
(d) no chromatids

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 Haloalkanes and Haloarenes Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQs on Haloalkanes and Haloarenes

1. Which of the following undergoes nucleophilic substitution exclusively by S_N1 mechanism?
(a) Benzyl Chloride
(b) Ethyl chloride
(c) Chlorobenzene
(d) Isopropyl chloride

2. The increasing order of nucleophilicity would be?
(a) Cl^– < Br^– < I^–
(b) I^– < Cl^– < Br^–
(c) Br^– < Cl^– < F^–
(d) I^– < Br^– < Cl^–

3. Which of the following is most reactive towards SN1 reaction?
(a) C₆H₅C(CH₃)C₆H₅Br
(b) C₈H₅CH₂Br
(c) C₆H₅CH(C₆H₅)Br
(d) C₆H₅CH(CH₃)Br

4. CH₃CH₂CH₂Br + NaCN → CH₃CH₂CH₂CN + NaBr, will be fastest in
(a) ethanol
(b) methanol
(c) N, N-dimethylformamide
(d) Water

5. A Grignard reagent may be made by reacting magnesium with
(a) Methyl amine
(b) Diethyl ether
(c) Ethyl iodide
(d) Ethyl alcohol

6. C-Cl bond of chlorobenzene in comparison to C-Cl bond in methyl chloride is
(a) Longer and weaker
(b) Shorter and weaker
(c) Shorter and stronger
(d) Longer and stronger

7. A solution of (+) 2-chloro-2-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl₅, due to the formation of
(a) carbanion
(b) carbene
(c) free radical
(d) carbocation

8. The decreasing order of boiling points of alkyl halides is
(a) RF > RCl > RBr > RI
(b) RBr > RCl > RCl > RF
(c) RI > RBr > RCl > RF
(d) RCl > RF > RI > RBr

9. Phosgene is commonly known as
(a) thionyl chloride
(b) carbonyl chloride
(c) carbon dioxide and phosphine
(d) phosphoryl chloride

10. The reaction of tert butyl bromide with sodium methoxide produces mainly
(a) isobutane
(b) isobutylene
(c) tert-butyl methyl ether
(d) sodium tert butoxide

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

MCQs on Neural Communication

1. The mode of communication between the neurons by sending electrical impulses known as _______.
(a) Membrane potentials
(b) Neuromodulators
(c) Neurotransmitters
(d) Action potentials

2. If the cell stimulation is strong, then the strength of the action potential produced would be ______.
(a) Weaker than the produced by weak stimulation
(b) Stronger than the produced by weak stimulation
(c) Double then the produced by the weak stimulation
(d) No different to the produced by weak stimulation

3. Dopamine, serotonin and noradrenaline are collectively called _______.
(a) Amines
(b) Hallucinogens
(c) Anxiolytics
(d) Neurotransmitters

4. The excess amount of produced neurotransmitters by presynaptic neurons is __________.
(a) Taken up by postsynaptic neurons
(b) Recycled back into the presynaptic neuron
(c) Removed and taken around the rest of the body
(d)  Eliminated by substances contained within the cell body

5. Acetylcholine is a neurotransmitter enabling communication between muscles and nerves. In case of an interruption in the interaction between acetylcholine and acetylcholine receptor sites on the muscles, this condition can occur in _______.
(a) Botulism
(b) Myasthenia gravis
(c) Multiple sclerosis
(d) Both A and B

6. Which of the following disorder causes dopamine neurons to die?
(a) Seizure disorder
(b) Multiple sclerosis
(c)Parkinson’s disease
(d) Lou Gehrig’s disease

7. Which of the following is a genetic disorder that induces neurons in the brain to drain away and die?
(a) Poliomyelitis
(b) Encephalitis
(c) Multiple sclerosis
(d) Huntington’s disease

8. Which of the following is called the common neurotransmitter?
(a) Acetylcholine
(b) Dopamine
(c) Serotonin
(d) All of the above

9. The cavity of the diencephalon is known as _______.
(a) First ventricle
(b) Third ventricle
(c) Second ventricle
(d)  Fourth ventricle

10. Which of the following is the cause for transmission of nerve impulse through nerve fibre in a single direction?
(a) Neurotransmitters released by dendrites.
(b) Neurotransmitters released by axon endings.
(c) Nerve fibre is insulated by a medullary sheath
(d) None of the above.