datavorous/entrance-exam-dataset huggingface dataset:
Question: Why do two field lines never cross each other at any point?

Options:
A The direction of the electric field at any point is fixed. Two electric fields never cross each other because if two fields cut each other then there will be two different directions of the electric field
B Because field lines are imaginary constructs and do not physically exist to cross each other.
C Because field lines are always parallel and do not have the ability to intersect.
D Because field lines follow the path of least resistance and avoid crossing to minimize energy.

The correct answer is:
The direction of the electric field at any point is fixed. Two electric fields never cross each other because if two fields cut each other then there will be two different directions of the electric field

Solution:
Correct Option is : (A)
The direction of the electric field at any point is fixed. Two electric fields never cross each other because if two fields cut each other then there will be two different directions of the electric field

Topic: Chemistry, Electrostatics, NEET
Question: Why does an iron nail near a bar magnet experience both a force of attraction and a torque?

Options:
A Because the iron nail is made of a magnetic material.
B Due to the presence of an induced magnetic moment in the nail.
C Because the bar magnet exerts a uniform magnetic field.
D Because the nail's shape causes it to experience torque.

The correct answer is:
Due to the presence of an induced magnetic moment in the nail.

Solution:
Correct Option is : (B)
Due to the presence of an induced magnetic moment in the nail.

Topic: Chemistry, Magnetic Properties of Matter, NEET
Question: Why does running a comb through one's dry hair attract small bits of paper? Options:

Options:
A Static electricity
B Chemical reaction
C Hair follicle interaction
D Temperature change

The correct answer is:
Static electricity

Solution:
Correct Option is : (A)
Static electricity

Topic: Chemistry, Capacitance, NEET
Question: Why does the conductivity of an aqueous solution of sugar differ from that of a solution containing sodium chloride, and how is this difference affected by changes in sodium chloride concentration?

Options:
A Sugar ionizes completely in water, while NaCl does not ionize, leading to different conductivities.
B Sugar ionizes partially in water, while NaCl ionizes completely, resulting in varied conductivities.
C Sugar does not ionize in water, but NaCl ionizes completely, causing differences in conductance.
D Sugar ionizes fully in water, while NaCl ionizes partially, influencing their conductivities.

The correct answer is:
Sugar does not ionize in water, but NaCl ionizes completely, causing differences in conductance.

Solution:
Correct Option is : (C)
Sugar does not ionize in water, but NaCl ionizes completely, causing differences in conductance.

Topic: Chemistry, Ionic Equilibrium, NEET
Question: Why does the stability of peroxide and superoxide of alkali metals increase as we go down the group?

Options:
A Due to an increase in atomic size and metallic character
B Because of a decrease in atomic size and metallic character
C As a result of increased electronegativity
D Because of a decrease in the number of valence electrons

The correct answer is:
Due to an increase in atomic size and metallic character

Solution:
Correct Option is : (A)
Due to an increase in atomic size and metallic character

Topic: Chemistry, s Block Elements, NEET
R-CH=CH2+CO+H2→HighTempRCH2CH2CHO
The above reaction is

Options:
A Mendius reaction
B Oxo process
C Sandorn's reaction
D Stephen's reaction

The correct answer is:
Oxo process

Solution:
Hydroformylation, also known as oxo synthesis or oxo process, is an industrial process for the production of aldehydes from alkenes. This chemical reaction entails the net addition of a formyl group (CHO) and a hydrogen atom to a carbon-carbon double bond.

Topic: Chemistry, Hydrocarbons, NEET
$\mathrm{R}-\mathrm{COOH} \frac{\text { (i) "X" }}{\text { (ii) } \mathrm{H}_2 \mathrm{O} / \mathrm{HCl}} \mathrm{R}-\mathrm{CH}_2 \mathrm{OH}$
$\mathrm{R}-\mathrm{CH}=\mathrm{CH}_2 \frac{\text { (i) " X" }}{\text { (ii) } \mathrm{H}_2 \mathrm{O}, \mathrm{NaOH}, \mathrm{H}_2 \mathrm{O}_2} \mathrm{R}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{OH}$
Identify ' $X$ ' in above reactions.

Options:
A $\mathrm{NaBH}_4$
B $\mathrm{H}_2 / \mathrm{Pd}$
C $\mathrm{B}_2 \mathrm{H}_6$
D $\mathrm{LiAlH}_4$

The correct answer is:
$\mathrm{B}_2 \mathrm{H}_6$

Solution:
$\mathrm{R}-\mathrm{COOH} \frac{\text { (i) } \mathrm{B}_2 \mathrm{H}_6}{\text { (ii) } \mathrm{H}_2 \mathrm{O} / \mathrm{HCl}} \mathrm{R}-\mathrm{CH}_2 \mathrm{OH}$
$\mathrm{R}-\mathrm{CH}=\mathrm{CH}_2 \frac{\text { (i) } \mathrm{B}_2 \mathrm{H}_6}{\text { (ii) } \mathrm{H}_2 \mathrm{O}, \mathrm{NaOH}, \mathrm{H}_2 \mathrm{O}_2} \mathrm{R}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{OH}$
- $\mathrm{LiAlH}_4$ and $\mathrm{NaBH}_4$ cannot reduce $\mathrm{C}=\mathrm{C}$
- $\mathrm{H}_2 / \mathrm{Pd}$ reduce alkene to alkane

Topic: Chemistry, Alcohols Phenols and Ethers, NEET, NEET 2023 (Manipur)
R is

Options:
A CH3CH2NH2
B CH3CN
C CH3CH2COOH
D CH3NH2

The correct answer is:
CH3NH2

Solution:
Here the reaction is as follows and the final product is methyl amine

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
R. M. S velocity of oxygen molecules at N.T.P is 0.5 km s-1. The R.M.S velocity for the hydrogen molecule at N.T.P is

Options:
A 4 km s-1
B 2 km s-1
C 3 km s-1
D 1 km s-1

The correct answer is:
2 km s-1

Solution:
The root mean square velocity is given by :
Vrms=3RTM
∴ Vrms∝ 1M
∴ Vo2VH2=232=14
∴ VH2=4 Vo2= 2 km s-1

Topic: Physics, Kinetic Theory of Gases, NEET
, R (major product) is

Options:
A
B
C
D None of these

The correct answer is:

Solution:

Topic: Chemistry, Amines, NEET
Rachel Carson's famous book ''Silent Spring'' is related to:

Options:
A Pesticide pollution
B Noise pollution
C Population explosion
D Ecosystem management

The correct answer is:
Pesticide pollution

Solution:
Rachel Carson's book "Silent Spring" is related to pesticide pollution which documented the detrimental effects on the environment particularly on birds by the indiscriminate use of pesticides. Carson accused the chemical industry of spreading disinformation and public officials of accepting industry claims unquestioningly.

Topic: Biology, Environmental Issues, NEET, NEET 2015 (Phase 1)
Radial nodes present in 2s and 2p-orbitals are respectively

Options:
A 0, 2
B 1, 0
C 2, 1
D 1, 2

The correct answer is:
1, 0

Solution:
Number of radial nodes =(n-l-1)
For 2s, n=2,l=0 (Number of radial node =2-0-1=1 )
For 2p,
n=2,l=1 (Number of radial node =2-1-1=0 )

Topic: Chemistry, Structure of Atom, NEET
Radial nodes present in 3s and 3p-orbitals are respectively

Options:
A 0, 2
B 2, 0
C 2, 1
D 1, 2

The correct answer is:
2, 1

Solution:
Number of radial nodes =(n-l-1)
For 3s, n=3,l=0
(Number of radial node =3-0-1=2 )
For 3p,
n=3,l=1
(Number of radial node =3-1-1=1 )

Topic: Chemistry, Structure of Atom, NEET
Radial symmetry is found in the flowers of

Options:
A Brassica
B Trifolium
C Pisum
D Cassia

The correct answer is:
Brassica

Solution:
Technical terms used to describe a flower:
Incomplete: A flower is described as incomplete, if one or more whorls are absent. E.g. Euphorbia
Actinomorphic: If the flower can be divided into two equal halves from any plane of symmetry it is called an actinomorphic flower. E.g. members of Brassicaceae, Solanaceae and Liliaceae family.
Zygomorphic: If the flower can be divided into two equal parts by just one plane of symmetry it is called a zygomorphic flower. E.g. members of the Fabaceae family.
Asymmetric: When the flower cannot be divided into two equal halves by any plane of symmetry.

Topic: Biology, Morphology of Flowering Plants, NEET, NEET 2016 (Phase 2)
Radial symmetry is found in

Options:
A Larva of Echinodermates
B Most of sponges
C Molluscs
D None of the above

The correct answer is:
None of the above

Solution:
Types of animals on the basis of symmetry:
a. Asymmetrical - No particular symmetry.
Examples - Most of the sponges.
b. Radially symmetrical - When any plane passing through the central axis of the body divides the organism into 2 equal halves.
Examples - Few sponges, coelenterates, ctenophores and adult echinoderms.
c. Bilaterally symmetrical - If the body of an organism is divisible into 2 equal halves only in one plane.
Examples - Platyhelminthes, aschelminthes, annelids, arthropods, molluscs, echinoderms and chordates.

Topic: Biology, Animal Kingdom, NEET
Radial symmetry is NOT found in adults of phylum ____

Options:
A Coelenterata
B Echinodermata
C Ctenophora
D Hemichordata

The correct answer is:
Hemichordata

Solution:
Hemichordata:

This phylum consists of a small group of worm-like marine animals with organ-system level of organisation.

They are bilaterally symmetrical, triploblastic and coelomate animals.

Stomochord is present.

The body is cylindrical and is composed of an anterior proboscis, a collar and a long trunk.

Circulatory system is of open type.

Adult Echinodermata members, Coelenterata members and Ctinophora members show radial symmetry.

Topic: Biology, Animal Kingdom, NEET, NEET 2023 (All India)
Radial vascular bundles characteristically occur in

Options:
A monocot and dicot stems.
B monocot and dicot leaves.
C monocot and dicot roots.
D all of these.

The correct answer is:
monocot and dicot roots.

Solution:
According to the arrangement of xylem and phloem, they are of 3 basic types of vascular tissues- radial vascular strand, concentric vascular strand and conjoint vascular strand. Radial vascular strand is found in all monocot and dicot roots while concentric vascular bundle is found in stem of fern and yucca whereas conjoint vascular bundle is found in T.S of monocot and dicot stem. Monocot and dicot leaves show collateral close vascular bundle (a type of conjoint vascular bundle).

Topic: Biology, Anatomy of Flowering Plants, NEET
Radiations of two photon's energy, twice and ten times the work function of metal are incident on the metal surface successively. The ratio of maximum velocities of photoelectrons emitted in two cases is

Options:
A 1 : 2
B 1 : 3
C 1 : 4
D 1 : 1

The correct answer is:
1 : 3

Solution:
12mv12=2ϕ0-ϕ0=ϕ0 and 12mv22=10ϕ0-ϕ0=9ϕ0
∴ v1v2=ϕ09ϕ0=13

Topic: Physics, Dual Nature of Matter, NEET
Radiations of two photon's energy, twice and ten times the work function of metal are incident on the metal surface successively. The ratio of maximum velocities of photoelectrons emitted in two cases is

Options:
A 1 : 2
B 1 : 3
C 1 : 4
D 1 : 1

The correct answer is:
1 : 3

Solution:
We know that
12mv12=2Ï0-Ï0=Ï0 and
12mv22=10Ï0-Ï0=9Ï0
â´ v1v2=Ï09Ï0=13

Topic: Physics, Dual Nature of Matter, NEET
Radii of two conducting circular loops are b and a respectively, where bâ«a. Centres of both loops coincide but planes of both loops are perpendicular to each other. The value of mutual inductance for these loops

Options:
A μ0πb22a
B Zero
C μ0πab2(a+b)
D μ0πa22b

The correct answer is:
Zero

Solution:
At the position of smaller loop, magnetic field due to larger loop is parallel to the plane of smaller loop. Due to larger loop. Magnetic flux with smaller loop is zero. Hence, mutual induction is zero.
Ï=Mi2
â 0=Mi2
â M=0

Topic: Physics, Electromagnetic Induction, NEET
Radioactive material A has decay constant 8λ and material B has decay constant λ. Initially they have the same number of nuclei. After what time, the ratio of number of nuclei of material A to that B will be 1e?

Options:
A 1λ
B 17λ
C 18λ
D 19λ

The correct answer is:
17λ

Solution:
Number of undecayed nuclei present at time t is
N=N0e-λt, here N0 is the number of radioactive nuclei in sample at time t=0.
So for A, NA=N0e-8λt
for B, NB=N0e-λt
given NANB=1e
Then
NANB=N0e-8λtN0e-λt
1e=e-7λt
-1=-7λt
t=17λ

Topic: Physics, Nuclear Physics, NEET, NEET 2017
Radioactively-labelled d-nucleotides are introduced into a cell.

In which cell structures will the radioactivity first become concentrated?

Options:
A 1 and 2
B 1 and 4
C 2 and 3
D 3 and 4

The correct answer is:
2 and 3

Solution:
Here, 2 and 3 are nucleus and mitochondria which contain DNA that made of nucleotide. Rest of the labelled organelles do not contain nucleotides/DNA where 1 is rough endoplasmic reticulum and 4 is golgi complex.

Topic: Biology, Cell - The Unit of Life, NEET
Radula and water vascular system are found in organism A and organism B respectively. Identify A and B.

Options:
A A - Locusta, B - Chiton
B A - Sea hare, B - Betta
C A - Tusk shell, B - Sea urchin
D A - Apis, B - Bombyx

The correct answer is:
A - Tusk shell, B - Sea urchin

Solution:
Radula in Mollusca - It is a file like rasping organ in the mouth that helps in feeding.
Examples: Pila (Apple snail), Pinctada (Pearl oyster), Sepia (Cuttlefish), Loligo (Squid), Octopus (Devilfish), Aplysia (Seahare), Dentalium (Tusk shell) and Chaetopleura (Chiton).
A most important feature of Echinodermates: Presence of water vascular system. It performs the function of locomotion, capture and transport of food.
Examples: Asterias (Star fish), Echinus (Sea urchin), Antedon (Sea lily), Cucumaria (Sea cucumber) and Ophiura (Brittle star).

Topic: Biology, Animal Kingdom, NEET
Rain, driven by the wind, falls on a railway compartment with a velocity of 20 m s-1, at an angle of 30Â° to the vertical. The train moves, along the direction of wind flow, at a speed of 108 km h-1. The apparent velocity of rain for a person sitting in the train is

Options:
A 207 m s-1
B 107 m s-1
C 157 m s-1
D 107 km h-1

The correct answer is:
107 m s-1

Solution:
Speed of train=108×518=30 m s-1
Let v⁡ → R⁡ and v⁡ → T⁡ represent the respective velocities of rain and train.
Now, the relative velocity of rain w.r.t person (train) is given by v⁡R, T=v⁡→R⁡-v⁡→T⁡⇒v⁡→R⁡+-v⁡→T⁡
Let OR → and RT → represent the vectors in magnitude and direction.
vR,T2=vR2+vT2+2×vR×vT×cos 120°
= 2 0 2 + 3 0 2 - 2 × 2 0 × 3 0 × 1 2
=400+900-600=700

Apparent velocity of rain=700 m s-1=107 m s-1

Topic: Physics, Motion In Two Dimensions, NEET
Raj having genotype AaBBCc for skin colour marries Simran having genotype AAbbCc for skin colour. What is the chance that they have a child whose skin colour doesn't match with either Raj's or Simran's?

Options:
A 12.5%
B 16.67%
C 25%
D 50%

The correct answer is:
25%

Solution:
Inheritance of skin colour is polygenic. Three different genes colour this trait. The more number of dominant alleles a person has the darker is his skin. Raj has genotype AaBBCc with 4 dominant alleles. He will produce four types of gametes ABC, ABc, aBC, and aBc. Simran has genotype AAbbCc with 3 dominant alleles. She will produce two types of gametes AbC and Abc. Simran is fairer than Raj. The genotypes of their children can be tabulated as follows:

ABC	ABc	aBC	aBc

AbC	AABbCC
5 dominant alleles Darker than Raj and Simran	AABbCc
4 dominant alleles Same skin tone as that of Raj	AaBbCC
4 dominant alleles Same skin tone as that of Raj	AaBbCc
3 dominant alleles Same skin tone as that of Simran

Abc	AABbCc
4 dominant alleles Same skin tone as that of Raj	AABbcc
3 dominant alleles Same skin tone as that of Simran	AaBbCc
3 dominant alleles Same skin tone as that of Simran	AaBbcc
2 dominant alleles Fairer than Raj and Simran

Thus two genotypes AABbCC and AaBbcc out of 8 genotypes whose skin colour doesn't match with either Raj's or Simran's. Their probability is 28 = 25%

Topic: Biology, Principles of Inheritance and Variation, NEET
"Ramachandran plot" is used to confirm the structure of

Options:
A RNA
B proteins
C triacylglycerides
D DNA

The correct answer is:
proteins

Solution:
'Ramachandran plot' is used to confirm the structure of proteins. Ramachandran plot is a plot of the angles-phi $(\varphi)$ and psi $(\psi)$ of amino acids found in a peptide chain. This plot was developed by GN Ramachandran, an Indian Scientist in 1963.

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2019 (Odisha)
Ramesh's grandfather falls ill repeatedly due to infections. The doctor says it's because his immunity is lowered owing to his old age. Which of the following is likely to be affected?

Options:
A Thyroid gland
B Pituitary gland
C Adrenals
D Thymus

The correct answer is:
Thymus

Solution:
Thymus gland secretes hormones called thymosins. Thymosins play a major role in the differentiation of T lymphocytes, which provide cell-mediated immunity and also promote production of antibodies to provide humoral immunity. Thymus is degenerated in old individuals resulting in a decreased production of thymosins. As a result, the immune responses of old persons become weak.

Topic: Biology, Human Health and Diseases, NEET
Random genetic drift in a population probably results from:

Options:
A highly genetically variable individuals
B interbreeding within this population
C constant low mutation rate
D large population size

The correct answer is:
interbreeding within this population

Solution:
Genetic drift (Sewall Wright effect) is the random change in the frequency of alleles in a population over successive generations in the gametes. Each new generation differs from its parental generation with regard to allele frequencies simply because of random variation in the distribution of gametes. This process is more rapid in smaller populations, or when the alleles concerned confer no apparent benefit compared to their counterparts.
Related Theory
A founder effect occurs when a new colony is started by a few members of the original population. This small population size means that the colony may have reduced genetic variation from the original population and a non-random sample of the genes in the original population.

Topic: Biology, Evolution, NEET, NEET 2003
Random unidirectional change in allele frequencies that occurs by chance in all populations and especially in small populations is known as:

Options:
A Migration
B Natural Selection
C Genetic drift
D Mutation.

The correct answer is:
Genetic drift

Solution:
Genetic drift is defined as the change in gene frequency that occurs by chance in a small population. It provides diversity to a population without any adaptations.

Topic: Biology, Evolution, NEET, NEET 2013 (Karnataka)
Rank the compounds given below in order of decreasing basicity

Options:
A I, II, III
B III, II, I
C II, III, I
D II, I, III

The correct answer is:
II, I, III

Solution:
Here the correct of basicity is
III is the weakest base since it is resonance stabilized and both resonance structures have negative charge on more electronegative (oxygen) atom.
I is weaker base than II since former has resonance stability.

Topic: Chemistry, General Organic Chemistry, NEET
Rank the following compounds in increasing order of their acidity:
1. 3-fluorobutanoic acid
2. 3-chlorobutanoic acid
3. 2-fluorobutanoic acid
4. Butanoic acid
5. 4-chlorobutanoic acid.

Options:
A 3 < 1 < 2 < 4 < 5
B 4 < 3 < 1 < 2 < 5
C 5 < 2 < 1 < 3 < 4
D 4 < 5 < 2 < 1 < 3

The correct answer is:
4 < 5 < 2 < 1 < 3

Solution:
Smaller the distance and higher the electronegativity of halogen, greater the -I effect, stronger the acid

Topic: Chemistry, General Organic Chemistry, NEET
Rank the following in the increasing order of rate of reaction with HBr

Options:
A R > P > Q
B R > Q > P
C P > R > S
D P > S > R

The correct answer is:
R > P > Q

Solution:
+M(-NH)>+M(O⋅⋅)>+H(-CH3)
Rate of E.A.R. ∝ Stability of carbocation ∝+M/+H/+I-M/-H/-I
(R) > (P) > (Q).

Topic: Chemistry, General Organic Chemistry, NEET
Rank the three compounds in order of decreasing acidity

Options:
A I, II, III
B III, II, I
C II, I, III
D II, III, I

The correct answer is:
II, I, III

Solution:
II is the strongest acid due to electron withdrawing resonance effect of -NO2 and III is weakest acid due to electron donating effect of -CH3 The decreasing order is
.

Topic: Chemistry, General Organic Chemistry, NEET
Rapid inter-nodal elongation is caused due to which hormone?

Options:
A Gibberellin
B Auxin
C Cytokinin
D Abscisic acid

The correct answer is:
Gibberellin

Solution:
Gibberellin promotes rapid intermodal elongation in genetically dwarf plants, this phenomenon is known as bolting. It also causes intermodal elongation in plants plant like sugarcane, thus is used to increase productivity of sugarcane.

Topic: Biology, Plant - Growth and Development, NEET
Rate constant of two reactions are given below. Indentifying their order of reaction.
(i)k=6.3×10-2Lmol-1s-1
(ii)k=2.8×10-4s-1

Options:
A (i) second order, (ii) first order
B (i) first order, (ii) second order
C (i) zero order, (ii) first order
D (i) second order, (ii) zero order

The correct answer is:
(i) second order, (ii) first order

Solution:
For second order, units of rate constant
=molL-1s×1(molL-1)2
=mol-1Ls-1
For first order, units of rate constant =molL-1s×1molL-1=s-1

Topic: Chemistry, Chemical Kinetics, NEET
Rate constants of a reaction at 500 K and $700 \mid \mathrm{K}$ are $0.04 \mathrm{~s}^{-1}$ and $0.14 \mathrm{~s}^{-1}$, respectively; then, activation energy of the reaction is :
(Given: $\log 3.5=0.5441, \mathrm{R}=8.31 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$

Options:
A 182310 J
B 18500 J
C 18219 J
D 18030 J

The correct answer is:
18219 J

Solution:
$\mathrm{K}=A e^{-E_a / R T}$
After taking In both side
$\ln K=\ln A-\frac{E_a}{R T}$
$\operatorname{In} \mathrm{K}_1=\ln \mathrm{A}-\frac{\mathrm{E}_{\mathrm{a}}}{\mathrm{RT}_1}$ at temp. $\mathrm{T}_1$...(i)
$\operatorname{In} \mathrm{K}_2=\ln \mathrm{A}-\frac{\mathrm{E}_{\mathrm{a}}}{\mathrm{RT}_2}$ at temp. $\mathrm{T}_2$,,(ii)
(ii) - (i)
$\operatorname{In} K_2-\operatorname{InK} K_1=\frac{E_a}{R}\left[\frac{1}{T_1}-\frac{1}{T_2}\right]$
$\ln \frac{\mathrm{K}_2}{\mathrm{~K}_1}=\frac{\mathrm{E}_{\mathrm{a}}}{\mathrm{R}}\left[\frac{1}{500}-\frac{1}{700}\right]$
$\ln \frac{0.14}{0.04}=\frac{E_a}{R}\left[\frac{700-500}{500 \times 700}\right]$
$\ln \frac{14}{4}=\frac{E_a}{R}\left[\frac{200}{500 \times 700}\right]$
$\log 3.5=\frac{E_a}{2.303 \times R}\left[\frac{1}{250 \times 7}\right]$
$0.5441=\frac{E_a}{2.303 \times 8.31}\left[\frac{1}{250 \times 7}\right]$
$E_a=0.5441 \times 8.31 \times 250 \times 7 \times 2.303$
$=0.5441 \times 83.1 \times 25 \times 7 \times 2.303$
$=18222.65$
$\approx 18219 \mathrm{~J}$

Topic: Chemistry, Chemical Kinetics, NEET, NEET 2024 (Re-NEET)
Rate of change of torque τ with deflection θ is maximum for magnet suspended freely in a uniform magnetic field of induction B, when

Options:
A θ=90°
B θ=60°
C θ=45°
D θ=0°

The correct answer is:
θ=0°

Solution:
Given that, θ=0°
Torque, τ=mBsin⁡ϕ
τ will be maximum, when
ϕ=90°
∴ Deflection angle, θ=90-ϕ
=90°-90°=0°

Topic: Physics, Magnetic Properties of Matter, NEET
Rate of reaction depends upon

Options:
A temperature
B catalyst
C concentration
D All of these

The correct answer is:
All of these

Solution:
Rate of reaction depends upon nature of reactants, concentration of the reactants, temperature and presence of catalyst.
It concentration of reactant â Rate of reaction â
Catalyst increases or decreases the rate of reaction
If âH=+ve as temperature increase rate of reaction increases
âH = -ve as temperature decreases the rate of reaction increases.

Topic: Chemistry, Chemical Kinetics, NEET
Ratio between the three speeds of gases Ump:Uavg:Urmsis

Options:
A 1:1.128:1.224
B 1.128:1:1.224
C 1.224:1.128:1
D 1:1.224:1.128

The correct answer is:
1:1.128:1.224

Solution:
Correct Option is : 1
1:1.128:1.224

Topic: Chemistry, States of Matter, NEET
Ratio in hydrogen and oxygen in water molecule by volume is

Options:
A 2 :1
B 3 :1
C 1 :2
D 1 :1

The correct answer is:
2 :1

Solution:
Formula of water is H2O .
So, 2 :1

Topic: Chemistry, Hydrogen, NEET
Ratio of intensities in consecutive maxima in a diffraction pattern due to a single slit is

Options:
A 1 : 2 : 3
B 1 : 4 : 9
C 1Â :2Ï2Â :3Ï2
D 1:49Ï2 :425Ï2

The correct answer is:
1:49Ï2 :425Ï2

Solution:
I=I0sinαα2and α=0,3π2,5π2, ………, for maxima
The ratio of Intensities of successive maxima is
1 :23π2 :25π2 or 1 : 49π2 :425π2

Topic: Physics, Wave Optics, NEET