Q JEE MAIN 2026

Identify the correct truth table of the given logic circuit.

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A voltage regulating circuit consisting of Zener diode, having break-down voltage of 10 V and maximum power dissipation of 0.4...

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Q JEE MAIN 2019

At $100^{\circ} \mathrm{C}$, copper $(\mathrm{Cu})$ has FCC unit cell structure with cell edge length of $\mathrm{x} \AA$. What is the...

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Q JEE MAIN 2019

An element has a face-centred cubic (fcc) structure with a cell edge of a. The distance between the centres of...

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Q JEE MAIN 2019

The ratio of number of atoms present in a simple cubic, body centered cubic and face centered cubic structure are,...

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Q JEE MAIN 2019

At $100^{\circ} \mathrm{C}$, copper $(\mathrm{Cu})$ has FCC unit cell structure with cell edge length of $\mathrm{x} \AA$. What is the...

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Q JEE MAIN 2019

A solid having density of $9 \times 10^3 \mathrm{~kg} \mathrm{~m}^{-3}$ forms face centred cubic crystals of edge length $...

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Q JEE Main 2019

To get output ‘1’ at R, for the given logic gate circuit the input values must be

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Q JEE MAIN 2019

The radius of the largest sphere which fits properly at the centre of the edge of a body centred cubic...

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Q JEE MAIN 2020

Which of the following compounds is likely to show both Frenkel and Schottky defects in its crystalline form ?

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Q JEE MAIN 2021

The empirical formula for a compound with a cubic close packed arrangement of anions and with cations occupying all the...

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Q JEE MAIN 2019

A compound of formula A2B3 has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral...

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Q JEE MAIN 2021

Given below are two statements. Statement I: Frenkel defects are vacancy as well as interstitial defects. Statement II: Frenkel defect...

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Q _JEE MAIN_2021_

Select the correct statements. (A) Crystalline solids have long range order. (B) Crystalline solids are isotropic. (C) Amorphous solid are...

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Q JEE MAIN 2021

Match List – I with List - II.

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Q JEE MAIN 2019

Element ‘B’ forms ccp structure and ‘A’ occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral...

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Q JEE MAIN 2021

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Q JEE MAIN 2021

Diamond has a three dimensional structure of C atoms formed by covalent bonds. The structure of diamond has face centred...

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The parameters of the unit cell of a substance are $a=2.5, b=3.0, c=4.0, \alpha=90^{\circ}, \beta=120^{\circ} \gamma=90^{\circ}$. The crystal system of...

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Q JEE MAIN 2019

Consider the bcc unit cells of the solids 1 and 2 with the position of atoms as shown below. The...

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Q JEE-MAIN 2021

KBr is doped with $10^{-5}$ mole percent of $\mathrm{SrBr}_2$. The number of cationic vacancies in 1 g of KBr crystal...

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Q JEE MAIN 2021

A hard substance melts at high temperature and is an insulator in both solid and in molten state. This solid...

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The unit cell of copper corresponds to a face centered cube of edge length $3.596 A $ with one copper...

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Q JEE Main 2019

The one that is extensively used as a piezoelectric material is

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Q JEE MAIN 2021

Ga (atomic mass 70 u) crystallizes in a hexagonal close packed structure. The total number of voids in 0.581 g...

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In a binary compound, atoms of element A form a hcp structure and those of element M occupy 2/3 of...

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Q JEE MAIN 2021

The number of octahedral voids per lattice site in a lattice is _____.(Rounded off to the nearest integer)

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Q JEE MAIN 2021

A certain element crystallises in a bcc lattice of unit cell edge length 27 Å. If the same element under...

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Q JEE MAIN 2021

The coordination number of an atom in a bodycentered cubic structure is _______. [Assume that the lattice is made up...

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Q JEE MAIN 2022

An element M crystallises in a body centred cubic unit cell with a cell edge of 300 pm . The...

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Metal $M$ crystallizes into a FCC lattice with the edge length of $4.0 \times 10^{-8} \mathrm{~cm}$. The atomic mass of...

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Q JEE MAIN 2022

An n.p.n transistor with current gain $\beta=100$ in common emitter configuration is shown in figure. The output voltage of the...

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Q JEE MAIN 2022

In the circuit, the logical value of A = 1 or B = 1 when potential at A or B...

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Q JEE-Main 2022

Atoms of element $X$ form hcp lattice and those of element $Y$ occupy $\frac{2}{3}$ of its tetrahedral voids. The percentage...

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Q JEE MAIN 2022

The distance between $\mathrm{Na}^{+}$and $\mathrm{Cl}^{-}$ions in 'solid NaCl of density $43.1 \mathrm{~g} \mathrm{~cm}^{-3}$ is $\_\_\_\_$ $\times 10^{-10} \mathrm{~m}$. (Nearest Integer)...

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Q JEE MAIN 2022

The incorrect statement about the imperfections in solids is :

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Q JEE MAIN 2024

In the given circuit, the voltage across load resistance ( $R_L$ ) is:

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Q JEE-Main_2023

A sample of a metal oxide has formula $\mathrm{M}_{0.83} \mathrm{O}_{100}$. The metal M can exist in two oxidation states +2...

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Q JEE MAIN 2025

The output voltage in the following circuit is (Consider ideal diode case)

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Q JEE MAIN 2023

Sodium metal crystallizes in a body centred cubic lattice with unit cell edge length of 4 Å. The radius of...

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Q JEE MAIN 2025

Consider the following logic circuit. The output is Y = 0 when :

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Q JEE MAIN 2023

https://competishun.com/the-correct-relationship-between-unit-cell-edge-length-a-and-radius-of-sphere-r-for-facecentred-and-body-centred-cubic-structures-respectively-are/

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Q JEE MAIN 2023

If each diode has a forward bias resistance of $25 \Omega$ in the below circuit, Which of the following options...

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Q JEE MAIN 2023

Number of crystal systems from the following where body centred unit cell can be found, is ____ Cubic, tetragonal, orthorhombic,...

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Q JEE MAIN 2023

A metal M forms hexagonal close-packed structure. The total number of voids in 0.02 mol of it is $\_\_\_\_$ $...

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Q JEE MAIN 2023

Iron oxide FeO , crystallises in a cubic lattice with a unit cell edge length of 5.0 A . If...

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Q JEE MAIN 2023

20 mL of 0.5 M NaCl is required to coagulate 200 mL of $\mathrm{AS}_2 \mathrm{~S}_3$ solution in 2 hours. The...

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Q JEE MAIN 2023

Choose the correct statement about Zener diode:

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Q JEE MAIN 2023

Which of the following expressions is correct in case of a CsCI unit cell (edge length'a')?

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Q JEE MAIN 2023

An atomic substance A of molar mass $12 \mathrm{~g} \mathrm{~mol}^{-1}$ has a cubic crystal structure with edge length of 300...

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Q JEE MAIN 2023

A compound is formed by two elements X and Y. The element Y forms cubic close packed arrangement and those...

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Q JEE MAIN 2023

In the given circuit, the current (I) through the battery will be :

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Q JEE MAIN 2023

A zener diode of power rating 1.6 W is to be used as voltage regulator. If the zener diode has...

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Q JEE MAIN 2023

When $\mathrm{Fe}_{0.93} \mathrm{O}$ is heated in presence of oxygen, it converts to $\mathrm{Fe}_2 \mathrm{O}_3$. The number of correct statement/s from...

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Q JEE MAIN 2023

A zener diode of power rating 1.6 W is to be used as voltage regulator. If the zener diode has...

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Q JEE MAIN 2023

When $\mathrm{Fe}_{0.93} \mathrm{O}$ is heated in presence of oxygen, it converts to $\mathrm{Fe}_2 \mathrm{O}_3$. The number of correct statement/s from...

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Q JEE MAIN 2023

Which of the following represents the lattice structure of$\mathrm{A}_{0.95} \mathrm{O}$ containing $\mathrm{A}^{2+} \mathrm{A}^{3+}$ and $\mathrm{O}^2$ions?

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Q JEE MAIN 2023

A cubic solid is made up of two elements $X$ and $Y$. Atoms of $X$ are present on every alternate...

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Q JEE MAIN

The correct truth table for the following logic circuit is :

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Q JEE MAINS 2024

Identify the logic operation performed by the given circuit

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