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The principal quantum number of an atom is related to the
orbital angular momentum
spin angular momentum
orientation of the orbital in space
size of the orbital
Which requires more work: lifting a 50-kg sack vertically 2 meters or lifting a 25-kg sack vertically meters
Lifting the 50-kg sack
none of them
Both require the same amount of work.
Lifting the 25-kg sack
A tertiary carbocation
(carbonium ion) is more stable than either a secondary or primary carbocation because
it carries three positive charges
it has a pyramidal configuration
it possesses three electron-donating substituent groups
it has a trigonal planar configuration
A circle touches the line L and the circle C1 externally such that both the circles are on the same side of the line, then thelocus of centre of the circle is
parts of straight line
Which one of the following compounds contains the greatest number of sp2 hybridized carbon atoms
Find the inverse of the function f(x) = 2x +3
y=1/2x - 3/2
NONE OF THESE
y = 1/ (2x+3)
y = 2x + 3
A steel bar can be magnetized by which one of the following methods
Divided touch method
All of These
Electric current method
Single touch method or Double touch method
The elevation in boiling point, when 13.44 g of freshly prepared CuCl2 are added to one kilogram of water, is.[Some useful data, Kb = 0.52 kg K mol–1, molecular weight of CuCl2 =134.
Which of the following is a factor preventing the use of nuclear fusion as a controlled energy source
Controlling the fusion reaction
Producing a container for high temperature gaseous ions.
All of the above.
Attaining a vary high temperature
The bonds present in N2O5 are
Covalent and ionic
Covalent and coordinate
The temperature at which real gases obey the ideal gas laws over a wide range of pressure is called
Of the following natural phenomena, tell which one known in Sanskrit as \'deer\'s thirst\'
Which of the following metals would be attracted to a permanent magnet
The most commonly used bleaching agent is
On a rainy day, small oil films on water show brilliantcolours.
This is due to___
In an alkaline medium, glycine predominantly exists as a /an____
A perfectly black body emits radiation at temperature T1 K.If it is to radiate 16 times this power, its temperature T2 will be
T2 = 16 T1
T1 = 4 T1
T2 = 8 T1
T2 = 2 T1
A standing wave having 3 nodes and 2 antinodes is found between two atoms having a distance of 1.2A°.Between them the wavelength of standing wave will be
A photon is a particle that
cannot travel in a vacuum
has zero electric field associated with it
has zero electric charge
has a velocity in a vacuum that varies with the photon frequency
(C = 4.0 μF) is connected through a resistor (R = 2.5 MΩ) across a battery of negligible internal resistance of voltage 12volts.
The time after which the potential difference across the capacitor becomes three times to that of resistor is (ln 2 = 0.693)
Calculate the temperature at which CO2 has the same rms speed to that of O2 at STP
∴ T =265.36 K
∴ T =335.56 K
∴ T =375.38 K
NONE OF THESE
Which of the following statements is not an essential feature of an optically active compound
The molecules of an optically active molecule must have at least one stereogenic site.
The molecules of an optically active compound will be dissymetric or asymmetric.
An optically active compound will have at least one stereoisomer.
An optically active compound\'s molecular configuration will not be identical with its mirror image
Let α, β be the roots of the equation x2 − px+ r = 0 and 2,2αβ be the roots of the equation x2 − qx+ r = 0. Then the value of r is
2 (p q)(2q p)9− −
2 (q 2p)(2q p)9− −
2 (2p q)(2q p)9− −
2 (q p)(2p q)9− −
A solution of metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourlesssolution.
Moreover, the solution of metal ion on treatment with a solution of cobalt(II) thiocyanate gives rise to a deep blue crystallineprecipitate.
The metal ion is
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because___
density of mercury is greater than that of water
cohesion of water is greater than its adhesion with glass
mercury is a metal
cohesion of mercury is greater than its adhesion with glass
Plank's constant has a value of
8.85 × 10^26
6.626 × 10^-34
8.988 × 10^-16
1.055 × 10^34
Energy is not carried by
Transverse progressive waves
Longitudinal progressive waves
In the experiment to determine the speed of sound using a resonance column,________
prongs of the tuning fork are kept in a vertical plane
prongs of the tuning fork are kept in a horizontal plane
out of the following, which is not emitted by radioactive substance
The rate constant of a first order reaction depends on the
Concentration of the product
Concentration of the reactant
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