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The angle between the tangents drawn from the point
4) to the parabola y2 = 4x is
When a mixture of calcium benzoate and calcium acetate is dry distilled, the resulting compound is____
The rate of radiation of black body at 0°C is Ewatt.
The rate of radiation of this black body at 273°C will be
What is the catalyst in the Haber process
out of the following, which is not emitted by radioactive substance
The two basic types of diodes are
For a first order reaction A → P, the temperature (T) dependent rate constant (k) was found to follow the equation log k
(2000) 1 6.0 T= −
. The pre-xponential factor A and the activation energy Ea, respectively,are
6.0 s−1 and 16.6 kJmol−1
1.0 × 106 s−1 and 16.6 kJmol−1
1.0 × 106 s−1 and 9.2 kJmol−1
1.0 × 106 s−1 and 38.3 kJmol−1
A sonometer string and a tuning fork when sounded together gives 6 beats/sec, whether the length of sonometer string is 85 cm or 100 cm. The frequency of tuning fork is
Which reaction conditions would best convert 3-hexyne to cis-3-hexene
Pt catalyst and H2.
Na in liquid NH3.
Lindlar\'s Pd catalyst and H2.
NaNH2 in liquid NH3
If 1 kg of water at its normal boiling point forms 1.671 m3 of steam, the external latent heat of vaporization of water is about (J = 4200\nJ/kcal)
If the half-life of Thorium is 24 days, the amount of a 12 gram sample remaining after 96 days is
Metallic bonds are generally stronger when
There are more electrons in the sea of electrons
There are less electrons in the sea of electrons.
The metal can conduct electricity.
There are more neutrons
Two pool balls, each moving at 2 m/s, roll toward each other andcollide.
Suppose after bouncing apart, each moves at 4 m/s. This collision violates conservation of
None of these.
both of these
The conversion of methane into chloromethane in the presence of UV light is an example of____
Free radical substitution
The oxygen in a ketone is usually ___ hybridized
NONE OF THESE
One calorie is defined as the heat required to raise the temperature of 1 gm of water by 10C in a certain interval of temperature and at certainpressure.
The temperature interval and pressure is
13.50C to 14.50C & 76 mm of Hg
14.50C to 15.50C & 760 mm of Hg
6.50C to 7.50C & 76 mm of Hg
98.50C to 99.50C & 760 mm of Hg
Super conductors are derived from compounds of
p – block
Which product would be formed, after work up with dilute sulfuric acid, when an excess of phenylmagnesium bromide, Ph-Mg-Br, reacts with methyl benzoate, PhCOOCH3
Two identical arrows, one with twice the speed of the other, are fired into a haybale.
The faster arrow will penetrate
twice as far as the slower arrow.
the same distance as the slower arrow.
None of these.
four times as far as the slower arrow.
A/c to Fick’s second law , rate of change of concentration with time
Which one of the following compounds contains the greatest number of sp2 hybridized carbon atoms
Suppose that two capacitors are inparallel.
Their values are 47.0 pF and 470 µF. What is the net capacitance of this combination
Pick out the scalar quantity
Which two characteristics of light can best be explained by the wave theory of light
reflection and interference
refraction and diffraction
relection and refraction
interference and diffraction
The compound whose 0.1 M solution is basic is
The Hα spectral line in Lyman series of hydrogen atomic spectrum is formed due to an electronic transition in hydrogenatom.
The energies associated with the electron in each of the orbits involved in the transition (in kCal mol-1) are
Which one of the following cannot be made from 1-bromopropane in a single reaction
Any p-orbital can accommodate up to
Two electrons in parallel groups
Two electrons with opposite spins
What is the ionization energy of the neutral hydrogen atom
NONE OF THESE
The compound that is not a Lewis acid is
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