A telescope of aperture diameter 5 m is used to observe the moon from the earth
A telescope of aperture diameter 5 m is used to observe the moon from the earth. Distance between the moon... View Article
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A screw gauge advances by 3 mm on main scale in 6 rotations
A screw gauge advances by 3 mm on main scale in 6 rotations. There are 50 divisions on circular scale.... View Article
An ideal liquid (water) flowing through a tube
An ideal liquid (water) flowing through a tube of non-uniform cross-sectional area, where area at A and B are 40... View Article
Three harmonic waves of same frequency (v)
Three harmonic waves of same frequency (v) and intensity (I0) having initial phase angles 0, π/4, -π/4 rad respectively. When... View Article
Two particles of equal mass
Two particles of equal mass m have respective initial velocities \(\begin{array}{l}\vec{u_{1}} = u\hat{i}\end{array} \) and \(\begin{array}{l}\vec{u_{2}} = \frac{u}{2}\hat{i} + \frac{u}{2}\hat{j}\end{array}... View Article
A body A of mass m is revolving around a planet in a circular orbit of radius R.
A body A of mass m is revolving around a planet in a circular orbit of radius R. At the... View Article
An electric dipole of moment
An electric dipole of moment \(\begin{array}{l}\vec{p} = (-\hat{i}-3\hat{j}+2\hat{k})\times 10^{-29}Cm\end{array} \) is at the origin (0,0,0). The electric field due to... View Article
For the given P-V graph of an ideal gas, chose the correct V-T graph. Process BC is adiabatic. (Graphs are schematic and not to scale).
For the given P-V graph of an ideal gas, chose the correct V-T graph. Process BC is adiabatic. (Graphs are... View Article
Particle moves from point A to point B along the line
Particle moves from point to point along the line shown in figure under the action of force \(\begin{array}{l}\vec{F} = -x\hat{i}+... View Article
Consider an infinitely long current carrying cylindrical straight wire
Consider an infinitely long current carrying cylindrical straight wire having radius ‘a’. Then the ratio of magnetic field due to... View Article
A solid sphere having a radius R and uniform charge density ρ.
A solid sphere having a radius R and uniform charge density ρ. If a sphere of radius R/2 is carved... View Article
Three identical solid sphere
Three identical solid spheres each have mass ‘m’ and diameter ‘d’ are touching each other as shown in the figure.... View Article
A xenon compound ‘A’ upon partial hydrolysis gives XeO2F2. The number of lone pairs of electrons presents in compound A is ______. (Round off to the Nearest Integer).
Answer: 19 Partial Hydrolysis XeF6 + H2O → XeOF4 + 2HF XeF6 + 2H2O → XeO2F2 + 4HF Complete hydrolysis... View Article
In Tollen’s test for aldehyde
In Tollen’s test for aldehyde, the overall number of electron(s) transferred to the Tollen’s reagent formula [Ag(NH3)2]+ per aldehyde group... View Article
10. 0 mL of Na2CO3 solution is titrated
10. 0 mL of Na2CO3 solution is titrated against 0.2 M HCl solution. The following litre values were obtained in... View Article
The number of species below that has two lone pairs of electrons in their central atom is ______. (Round off to the Nearest Integer.)
SF4, BF4–, CIF3, AsF3, PCl5, BrF5, XeF4, SF6 Answer: 2 ClF3 and XeF4 have two lp-in their central atom
A solute A dimerizes in water. The boiling point of a 2 molal solution of A is 100.52ºC. The percentage association of A is ______. (Round off to the nearest integer.)
A solute A dimerizes in water. The boiling point of a 2 molal solution of A is 100.52ºC. The percentage... View Article
Consider the below reaction
Consider the below reaction where 6.1 g of benzoic acid is used to get 7.8 g of m-bromo benzoic acid.... View Article
The equilibrium constant KC for this reaction is ______ × 10–2. (Round off to the Nearest Integer)
The equilibrium constant KC for this reaction is ______ × 10–2. (Round off to the Nearest Integer). [Use : R... View Article
A reaction has a half life of 1 min. The time required for 99.9% completion of the reaction is _____ min. (Round off to the nearest integer) [ Use ln2 = 0.69, ln10 = 2.3]
A reaction has a half life of 1 min. The time required for 99.9% completion of the reaction is _____... View Article
