datavorous/entrance-exam-dataset huggingface dataset:
Which type of bonding exists in $\mathrm{Li}_2 \mathrm{O}$ and $\mathrm{CaF}_2$ respectively

Options:
A Ionic, ionic
B Ionic, covalent
C Covalent, ionic
D Coordinate, ionic

The correct answer is:
Ionic, ionic

Solution:
Lithium oxide and calcium fluoride show ionic characters.

Topic: Chemistry, Chemical Bonding and Molecular Structure, JEE Main
Which type of compounds show high melting and boiling points

Options:
A Electrovalent compounds
B Covalent compounds
C Coordinate compounds
D All the three types of compounds have equal melting and boiling points

The correct answer is:
Electrovalent compounds

Solution:
Melting point and boiling point of electrovalent compounds are high due to strong electrostatic force of attraction between the ions.

Topic: Chemistry, Chemical Bonding and Molecular Structure, JEE Main
Which type of 'defect' has the presence of cations in the interstitial sites?

Options:
A Metal deficiency defect
B Schottky defect
C Vacancy defect
D Frenkel defect

The correct answer is:
Frenkel defect

Solution:
In Frenkel defect, some of the ions (usually cation due to their small size) missing from their correct position and occupies interstitial position.

Topic: Chemistry, Solid State, JEE Main, JEE Main 2018 (08 Apr)
Which type of defect present in NaCl ?

Options:
A Frenkel defect
B Schottky defect
C F-centre defect
D None of these

The correct answer is:
Schottky defect

Solution:
Key Idea Schottky defect is a vacancy defect in ionic solids. It is shown by those ionic substances in which the cations and anions are of almost similar sizes.
Schottky defect is present in sodium chloride $(\mathrm{NaCl})$. This defect arises when equal number of cations and anions are missing from their lattice sites such that electrical neutrality is maintained. e.g. $\mathrm{CsCl}, \mathrm{NaCl}, \mathrm{KCl}, \mathrm{AgBr}$, etc.

Topic: Chemistry, Solid State, JIPMER, JIPMER 2019
Which type of movement is shown by macrophages?

Options:
A Ciliary
B Amoeboid
C Flagellar
D Muscular.

The correct answer is:
Amoeboid

Solution:
Types of movements: The cells of the human body exhibit three main types of movements,
1. Amoeboid movement is shown by the macrophages and leucocytes.
2. Ciliary movement is observed in,
(i) Removing dust or foreign particles, etc in trachea.
(ii) Movement of ova through the female reproductive tract.
3. Muscular movement of limbs, jaws, tongue, etc in human beings and majority of multicellular organisms.

Topic: Biology, Locomotion and Movement, NEET
Which type of plants use the Calvin cycle as the main biosynthetic pathway?

Options:
A C₃ plants
B C₄ plants
C C₃ and C₄ plants
D None of the above

The correct answer is:
C₃ and C₄ plants

Solution:
Both C₃ and C₄ plants use the Calvin cycle as the main biosynthetic pathway.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Which type of silicate compound, Beryl Be 3 Al 2 Si 6 O 18 is?

Options:
A Chain silicate
B Cyclic silicate
C Planar silicate
D Disilicate

The correct answer is:
Cyclic silicate

Solution:
Beryl is a mineral composed of beryllium aluminum cyclic silicate with the chemical formula Be 3 Al 2 SiO 3 6

Topic: Chemistry, p Block Elements (Group 13 & 14), JEE Main
Which type of thermal expansion is responsible for expansion in liquids?

Options:
A Linear expansion
B Superficial expansion
C Cubical expansion
D All of these

The correct answer is:
Cubical expansion

Solution:
Cubical expansion is responsible for thermal expansion in liquids. When the temperature increases, liquids start to expand in their volumes.

Topic: Physics, Thermal Properties of Matter, JEE Main
Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?

Options:
A Monocytes
B Neutrophils
C Basophils
D Eosinophils

The correct answer is:
Basophils

Solution:
Basophils have a function similar to mast cells. So both basophils and mast cells contain heparin, histamine and serotonin.

Topic: Biology, Body Fluids and Circulation, NEET, NEET 2008 (Mains)
Which types of bonds is/are present in diborane (B2H6)?

Options:
A Ionic bond
B Three centre bond
C Hydrogen bond
D Co-ordinate bond

The correct answer is:
Three centre bond

Solution:
The diborane molecule has two types of B-H bond :
(i) B-Ht -It is a normal covalent bond.
(ii) B-Hb-B - It is a three centred bond (bridging bond).

Topic: Chemistry, p Block Elements (Group 13 & 14), JEE Main
Which types of isomerism is shown by 2,3-dichlorobutane?

Options:
A
Diastereo

B
Optical

C
Geometric

D
Structural

The correct answer is:
Optical

Solution:

Topic: Chemistry, General Organic Chemistry, JEE Main, JEE Main 2005
Which underground stem helps in the storage of food and perennation?

Options:
A Colocasia
B Zamikand
C Turmeric
D All of these

The correct answer is:
All of these

Solution:
Underground stems are modified plants that grow horizontally under the surface of the stem but are derived from the stem tissue only. They mainly work as a storage for food and nutrients, like tubers and rhizomes, these modified stems also function to propagate new clones and perennation. Few examples of such stems are Colocasia, Zamikand, Turmeric, potatoes, ginger etc.

Topic: Biology, Morphology of Flowering Plants, NEET
Which vitamin deficiency can lead to the condition known as scurvy?

Options:
A Vitamin A
B Vitamin B12
C Vitamin D
D Vitamin C

The correct answer is:
Vitamin C

Solution:
Scurvy is caused by a deficiency of vitamin C, which is necessary for the synthesis of collagen and the maintenance of healthy skin and blood vessels.

Topic: Chemistry, Biomolecules, NEET
Which vitamin deficiency can lead to the condition known as xerophthalmia, characterized by dryness and damage to the eyes?

Options:
A Vitamin A
B Vitamin B6
C Vitamin C
D Vitamin D

The correct answer is:
Vitamin A

Solution:
Xerophthalmia is a condition resulting from a deficiency of vitamin A, which is essential for maintaining healthy eyes and preventing dryness and damage.

Topic: Chemistry, Biomolecules, NEET
Which vitamin is associated with the maintenance of bone density?

Options:
A Vitamin C
B Vitamin D
C Vitamin $\mathrm{B}_{12}$
D All of these

The correct answer is:
All of these

Solution:
Bone density is the amount of bone mineral present in bone tissue. The higher the bone mineral content, the denser the bones are. Several vitamins are important to bone health. Vitamin $\mathrm{B}_{12}$ has an effect on bone building cells. The low levels of $\mathrm{B}_{12}$ result in the higher risk of osteoporosis in both men and women and thus results in lower bone density. Vitamin $\mathrm{C}$ is essential for the formation of collagen, the foundation that bone mineralization is built on. Increased levels of vitamin $\mathrm{C}$ results in greater bone density. Vitamin D is most essential for greater bone density. It helps the body to absorb calcium.

Topic: Biology, Digestion and Absorption, AIIMS, AIIMS 2019 (25 May)
Which vitamin is essential for the absorption of calcium in the intestines?

Options:
A Vitamin B12
B Vitamin D
C Vitamin C
D Vitamin A

The correct answer is:
Vitamin D

Solution:
Vitamin D plays a crucial role in the absorption of calcium in the intestines, helping to maintain healthy bones and teeth.

Topic: Chemistry, Biomolecules, NEET
Which vitamin is important for calcium absorption and bone health?

Options:
A Vitamin A
B Vitamin C
C Vitamin D
D Vitamin K

The correct answer is:
Vitamin D

Solution:
Vitamin D is essential for the absorption of calcium and plays a crucial role in maintaining bone health.

Topic: Chemistry, Biomolecules, NEET
Which vitamin is important for maintaining healthy vision and is commonly found in carrots and other orange-colored vegetables?

Options:
A Vitamin B1
B Vitamin C
C Vitamin D
D Vitamin A

The correct answer is:
Vitamin A

Solution:
Vitamin A is important for maintaining healthy vision and is commonly found in orange-colored vegetables like carrots.

Topic: Chemistry, Biomolecules, NEET
Which vitamin is important for the formation and maintenance of healthy skin, and a deficiency can lead to skin problems?

Options:
A Vitamin C
B Vitamin K
C Vitamin A
D Vitamin B12

The correct answer is:
Vitamin A

Solution:
Vitamin A is essential for the formation and maintenance of healthy skin, and a deficiency can lead to various skin problems.

Topic: Chemistry, Biomolecules, NEET
Which weight (W) for block B would maintain equilibrium for the system described, where block A weighs 100 N and rests on a frictionless inclined plane with a slope angle of 30°, and a flexible cord passes over a frictionless pulley to connect to block B?

Options:
A W = 25 N
B W = 50 N
C W = 75 N
D W = 100 N

The correct answer is:
W = 50 N

Solution:
Correct Option is : (B)
W = 50 N

Topic: Chemistry, Laws of Motion, NEET
Which will have the highest enol content?

Options:
A

B

C

D

The correct answer is:

Solution:
Keto enol tautomerism

As complete conjugation is there in the above enolic form, It is the most stable enol and option D is the correct answer.

Topic: Chemistry, General Organic Chemistry, JEE Main, JEE Main 2022 (26 Jun Shift 1)
Which will undergo reaction with ammoniacal $\mathrm{AgNO}_3$

Options:
A

B $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{C} \equiv \mathrm{CH}$
C $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_2-\mathrm{CH}_3$
D $\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{CH}_3$

The correct answer is:
$\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{C} \equiv \mathrm{CH}$

Solution:
$\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{C} \equiv \mathrm{C}-\mathrm{H}$. Acidic hydrogen
( $H$ atom attached to triple bond) is present therefore it gives reaction with ammoniacal
$\mathrm{AgNO}_3$

Topic: Chemistry, Hydrocarbons, JEE Main
While a capacitor remains connected to a battery and dielectric slab is applied between the plates, then

Options:
A Potential difference between the plates is changed
B Charge flows from the battery to the capacitor
C Electric field between the plates increases
D Energy store in the capacitor decreases

The correct answer is:
Charge flows from the battery to the capacitor

Solution:
By inserting the dielectric slab. Capacitance (i.e. ability to hold the charge) increases. In the presence of battery more charge is supplied from battery.

Topic: Physics, Capacitance, JEE Main
While assigning R and S configuration, the correct order of priority of groups attached to the chiral carbon atom is

Options:
A CONH2>COCH3>CH2OH>CHO
B CONH2>COCH3>CHO>CH2OH
C COCH3>CONH2>CHO>CH2OH
D CHO>CH2OH>COCH3>CONH3

The correct answer is:
CONH2>COCH3>CHO>CH2OH

Solution:
Priority of groups attached to chiral carbon atom is decided based on the atomic number of the substituent.

Topic: Chemistry, General Organic Chemistry, JEE Main
While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from 0.25 g of the compound neutralized 2.5 mL of 2MH2SO4. The percentage of nitrogen present in organic compound is _____ .

Options:

The correct answer is:
56

Solution:
The equivalent of ammonia contains 14 grams of nitrogen. The number of equivalents of acid used is equal to number of equivalents of ammonia evolved.

Number of equivalents of acid used =Normality ×Volume in L

Hence, the percentage of nitrogen can be calculated form the following

%N=1.4 N1V1 mass of organic compound

% N=1.42.5×2×20.25=56

Topic: Chemistry, General Organic Chemistry, JEE Main, JEE Main 2022 (25 Jul Shift 1)
While isolating DNA from bacteria, which of the following enzyme is not used?

Options:
A Lysozyme
B Ribonuclease
C Deoxyribonuclease
D Protease.

The correct answer is:
Deoxyribonuclease

Solution:
DNA isolation is a process where the whole intact DNA is separated from the cell body for further use. One of the important steps in the isolation process is to avoid breaking the DNA. Hence, DNA breaking or digesting enzymes are not used in the process deoxyribonuclease.
Ribonuclease is the group of enzymes that break down RNA having ribose sugar in its nucleotides. Proteases are the enzymes that break smaller peptides chains to dipeptides found to be active in the digestion process in our alimentary canal. Lysozymes are the lytic group of enzymes found in the organelle lysosome with the main function being the digestion or breaking down of foreign and waste particles.

Topic: Biology, Biotechnology - Principles and Processes, NEET
While light is used in the Young's double slit experiment. Then

Options:
A The central fringe will be white.
B There will not be a completely dark fringe.
C Fringe next to the central fringe will be red.
D Fringe next to the central fringe will be violet.

The correct answer is:
The central fringe will be white.

Solution:
The waves of each wavelength form their separate interference pattern. Therefore, the central fringe is white, violet fringe appears next and red fringe last according to their respective wavelengths.

Topic: Physics, Wave Optics, JEE Main
While measuring diameter of wire using screw gauge the following readings were noted. Main scale reading is $1 \mathrm{~mm}$ and circular scale reading is equal to 42 divisions. Pitch of screw gauge is $1 \mathrm{~mm}$ and it has 100 divisions on circular scale. The diameter of the wire is $\frac{x}{50} \mathrm{~mm}$. The value of $x$ is :

Options:
A 21
B 142
C 71
D 42

The correct answer is:
71

Solution:
$\begin{aligned} & \mathrm{MSR}=1 \mathrm{~mm}, \mathrm{CSR}=42, \text { pitch }=1 \mathrm{~mm} \\ & \mathrm{LC}=\frac{\text { pitch }}{\text { No. of CSD }}=\left(\frac{1}{100}\right)=0.01 \mathrm{~mm} \\ & \text { Diameter }=\mathrm{MSR}+\mathrm{LC} \times \mathrm{CSD} \\ & \text { Diameter }=1+(0.01) \times 42 \mathrm{~mm} \\ & \text { Diameter }=1.42 \mathrm{~mm}=\frac{\mathrm{x}}{50} \\ & \therefore \mathrm{x}=71\end{aligned}$

Topic: Physics, Experimental Physics, JEE Main, JEE Main 2024 (06 Apr Shift 1)
While measuring the speed of sound by performing a resonance column experiment, a student gets the first resonance condition at a column length of $18 \mathrm{~cm}$ during winter. Repeating the same experiment during summer, she measures the column length to be $\mathrm{xcm}$ for the second resonance. Then

Options:
A
$18>x$

B
$x>54$

C
$54>x>36$

D
$36>x>18$

The correct answer is:
$x>54$

Solution:
$$
\begin{aligned}
& n=\frac{1}{4 x} \sqrt{\frac{\gamma R T}{M}} \\
& x n=\frac{1}{4} \sqrt{\frac{\gamma R T}{M}} \\
& x \propto \sqrt{T}
\end{aligned}
$$

Topic: Physics, Waves and Sound, JEE Main, JEE Main 2008
While performing a thermodynamics experiment, a student made the following observations, HCl+NaOH→NaCl+H2OΔH=-57.3 kJ mol-1

CH3COOH+NaOH→CH3COONa+H2O

ΔH=-55.3 kJ mol-1.

The enthalpy of ionization of CH3COOH as calculated by the student is kJ mol-1.

Options:

The correct answer is:
2

Solution:
The enthalpy of neutralization (ΔHn) is the change in enthalpy that occurs when one equivalent of an acid and a base undergo a neutralization reaction to form water and a salt. It is a special case of the enthalpy of reaction. It is defined as the energy released with the formation of 1 mole of water.

△H Ionization of weak acid =∆H Neutralization of W A + S B − ∆H Neutralization of S A + S B =

ΔHionisation of CH3COOH=-55.3-(-57.3)

=2KJ/mol

Hence, 2KJ/mol of heat is absorbed for the ionization of acetic acid.

Topic: Chemistry, Thermodynamics (C), JEE Main, JEE Main 2022 (25 Jul Shift 2)
While preparing crystals of Mohr's salt, dil \(\mathrm{H}_2 \mathrm{SO}_4\) is added to a mixture of ferrous sulphate and ammonium sulphate, before dissolving this mixture in water, dil \(\mathrm{H}_2 \mathrm{SO}_4\) is added here to :

Options:
A prevent the hydrolysis of ferrous sulphate
B prevent the hydrolysis of ammonium sulphate
C make the medium strongly acidic
D increase the rate of formation of crystals

The correct answer is:
prevent the hydrolysis of ferrous sulphate

Solution:
$\mathrm{Fe}^{+2}$ ions undergoes hydrolysis, therefore while preparing aqueous solution of ferrous sulphate and ammonium sulphate in water dilute sulphuric acid is added to prevent hydrolysis of ferrous sulphate.

Topic: Chemistry, d and f Block Elements, JEE Main, JEE Main 2024 (05 Apr Shift 2)
While titration dilute HCI solution with aqueous NaOH, which of the following will not be required ?

Options:
A Burette and porcelain tile
B Pipette and distilled water
C Clamp and phenolphthalein
D Bunsen burner and measuring cyclinder

The correct answer is:
Bunsen burner and measuring cyclinder

Solution:
In this acid base Titrating there is no use of Bunsen burner and measuring cylinder other laboratory equipments will be required for getting the end point of titration.

These are the equipment required for titration.

Burette

Conical flask

Beaker

Pipette

Stirring rod

Small (filter) funnel

Burette stand and clamp (note 2)

White tile

Indicator

Topic: Chemistry, Redox Reactions, JEE Main
While titration dilute HCI solution with aqueous NaOH, which of the following will not be required ?

Options:
A Burette and porcelain tile
B Pipette and distilled water
C Clamp and phenolphthalein
D Bunsen burner and measuring cyclinder

The correct answer is:
Bunsen burner and measuring cyclinder

Solution:
In this acid base Titrating there is no use of Bunsen burner and measuring cylinder other laboratory equipments will be required for getting the end point of titration.

These are the equipment required for titration.

Burette

Conical flask

Beaker

Pipette

Stirring rod

Small (filter) funnel

Burette stand and clamp (note 2)

White tile

Indicator

Topic: Chemistry, Redox Reactions, JEE Main, JEE Main 2020 (02 Sep Shift 1)
White bauxite is leached by

Options:
A Hall's process
B Serpeck's process
C Bayer's process
D All of these

The correct answer is:
Serpeck's process

Solution:
In white bauxite, SiO 2 is main impurity and concentrated by serpeck's process.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, JEE Main
White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in air contains

Options:
A Yellow, orange, red
B Violet, indigo, blue
C All colours
D All colours except green

The correct answer is:
Yellow, orange, red

Solution:
$C=\sin ^{-1}\left(\frac{1}{\mu}\right)$ and $\mu \propto \frac{1}{\lambda}$
Yellow, orange and red have higher wavelength than green, so $\mu$ will be less for these rays, consequently critical angle for these rays will be high, hence if green is just totally internally reflected then yellow, orange and red rays will emerge out.

Topic: Physics, Ray Optics, JEE Main
White light is passed through a double slit and interference is observed on a screen 1.5 m away. The separation between the slits is 0.3 mm. The first violet and red fringes are formed 2.0 mm and 3.5 mm away from the central white fringes. The difference in wavelengths of red and violet light is in nm.

Options:

The correct answer is:
300

Solution:
y1=λrDd

y2=λvDd

λr−λv=y1−y2dD=(3.5−2)mm×0.3mm1.5m=300nm

Topic: Physics, Wave Optics, JEE Main, JEE Main 2021 (26 Aug Shift 1)
White light is used to illuminate the two slits in a Young's double experiment. The observed central fringe is

Options:
A black
B white
C blue
D red

The correct answer is:
white

Solution:
White light is used to illuminate the two slits in a Young's double slit experiment. The central point of the fringe pattern is at the same distance from the two coherent sources. Hence, at this point, each of the colours (white light consists of seven different colours) maintain same phase differences.
Therefore, the observed central fringe is white.

Topic: Physics, Wave Optics, TS EAMCET, TS EAMCET 2021 (06 Aug Shift 2)
White light is used to illuminate the two slits in Young's double-slit experiment. The separation between the slits is d and the distance between the slits and screen is D dâªD. At a point on the screen directly in front of one of the slits, certain wavelengths are missing. The missing wavelengths are

Options:
A λ=d2Dn-1
B λ=d2D2n-1
C λ=d2Dn
D λ=d2Dn

The correct answer is:
λ=d2D2n-1

Solution:
The nth order dark fringe is at a distance yn from the control zero-order bright fringe where
yn=n+12λDd, Here, n=0, 1, 2 ......etc.
yn=n-12λDd, Here n=1,2 .......etc.
For the point on the screen directly infront of one of the slits, yn=d2.
So, d2=n-12λDd ⇒ λ=d2D2n-1

Topic: Physics, Wave Optics, JEE Main
White light is used to illuminate the two slits in Young's double-slit experiment. The separation between two slits is x and the screen is at distance z>>x from the slits. At a point on the screen directly in front of one of the slit which wavelength is absent?

Options:
A 2x2z
B 3x2z
C x25z
D x22z

The correct answer is:
x25z

Solution:
ynth dark=2n-1λD2d =2n-1×z2x
x2=2n-12λzx

λ=x22n-1z

λ=x2z for n=1

λ=x23z for n=2

λ=x25z for n=3

Topic: Physics, Wave Optics, JEE Main
White light reflected at normal incidence from a soap film has minima at 6500 Aâ and maxima at 7500 Aâ in the visible region without minimum in between. If Î¼ is 53 for the thin film, the thickness of the film is

Options:
A 7.40Ã10-7 m
B 9.75Ã10-5Â mm
C 9.70Ã10-7Â cm
D 9.75Ã10-4Â mmÂ

The correct answer is:
7.40Ã10-7 m

Solution:
For minima to occur,
2μt=2nλ12 ...(i)
and for maxima
2μt=2n-1λ22 ...(ii)
From Equations. (i) and (ii), we get
2n-1λ2=2nλ1
or 2n-17500=2n6500
given, λ2=7500 A∘, λ1=6500 A∘
or 15000n-7500=13000n
or 2000n=7500
or n=3.75
Substituting the value of n in equation (i), we get
2×53×t=2×3.75×65002×10-10∵ μ=53
⇒ t=7.40×10-7 m

Topic: Physics, Wave Optics, JEE Main
White phosphorus contains

Options:
A $P_5$ molecules
B $P_4$ molecules
C $P_6$ molecules
D $P_2$ molecules

The correct answer is:
$P_4$ molecules

Solution:
White Phosphorus contains $P_4$ molecules.
Hence, Option "2" is the correct answer.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), JEE Main
White phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2 gives phosphine and compound X.X on acidification with HCl gives compound Y. The basicity of compound Y is:

Options:
A 2
B 1
C 4
D 3

The correct answer is:
1

Solution:
P 4 +3NaOH+3 H 2 Oâ 3 NaH 2 PO 2 x + PH 3
NaH 2 PO 2 +HClâNaCl+ H 3 PO 2 Y

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), JEE Main, JEE Main 2020 (08 Jan Shift 2)
White phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2 gives phosphine and compound (X) . (X) on acidification with HCl gives compound (Y) . The basicity of compound (Y) is

Options:
A 3
B 5
C 2
D 1

The correct answer is:
1

Solution:
Here Hypophosphorus acid is formed as Y and its basicity is 1.
P4+NaOH+H2O→PH3+NaH2PO2→HClH3PO2
Basicity = 1

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), JEE Main
White phosphorus reacts with thionyl chloride to give

Options:
A PCl5,SO2 and S2Cl2
B PCl3,SO2 and S2Cl2
C PCl3,SO2 and Cl2
D PCl5,SO2 and Cl2

The correct answer is:
PCl3,SO2 and S2Cl2

Solution:
The action of thionyl chloride with white phosphorus produces phosphorus trichloride, sulphur dioxide and sulphur monochloride.

P4+8SOCl2→4PCl3+4SO2+2 S2Cl2

PCl3 has a pyramidal shape,in which phosphorus is sp 3 hybridised.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), JEE Main, JEE Main 2022 (28 Jul Shift 2)
Who coined the word 'atom'?

Options:
A Democritus
B Thomson
C E Rutherford
D John Dalton

The correct answer is:
Democritus

Solution:
The word "atomos" was coined by a Greek philosopher named Democritus.

Topic: Physics, Atomic Physics, JEE Main
Who developed the long form of periodic table

Options:
A Lothar Meyer
B Niels Bohr
C Mendeleef
D Moseley

The correct answer is:
Niels Bohr

Solution:
Neils Bohr developed the long form of periodic table on the basis of Mosley’s principle

Topic: Chemistry, Classification of Elements and Periodicity in Properties, JEE Main