The order of appearance of the following with increasing temperature during the refining of crude oil is:
Kerosene, gasoline, diesel
Diesel, gasoline, kerosene
Gasoline, kerosene, diesel
Gasoline, diesel, kerosene
Fast neutrons can easily be slowed down by:
The use of lead shelding
Passing them through water
Elastic collisions with heavy nuclei
Applying a strong electric field
For a spontaneous change in a system at constant temperature and pressure, which of the following statements is true?
ΔG < 0
ΔG = 0
ΔG > 0
There is no restriction on the value of ΔG
Phenyl magnesium bromide reacts with methanol to give:
A mixture of anisole and Mg(OH)Br
A mixture of benzene and Mg(OMe)Br
A mixture of toluene and Mg(OH)Br
A mixture of phenol and Mg(Me)Br
Which among the following element is an essential constituent of acids?
Which one of the following statements is not true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?
The most probable speed increases
The fraction of the molecules with the most probable speed increases
The distribution becomes broader
The area under the distribution curve remains the same as under the lower temperature
Which of the following statements is always true for a system at equilibrium under conditions of constant temperature and pressure?
ΔS > 0
ΔG = 0
dG = dw'max
ΔG > 0
The ore which is found in abundance in India is:
Faraday's Law is associated with:
Reaction of gases
Pressure of gases
Temperature and pressure
Which of the following statements is always true for a liquid mixture of two components A and B in equilibrium with a mixture of their vapours?
μA(l) = μB(l) and μA(g) = μB(g)
μA(l) = μA(g) = μB(l) = μB(g)
μA(l) = μA(g) and μB(l) = μB(g)
μA(l) ≠ μA(g) ≠ μB(l) ≠ μB(g)
pH of water is:
What is the most common isotope of hydrogen?
Hydrogen only has one isotope!
A pressure vessel contains a gaseous mixture made up of 2.34 kg silane, SiH4, and 55.4 kg argon. Determine the mole fraction of silane.
The metal that is used as a catalyst in the hydrogenation of oils is:
Which among the following is the most abundant organic compound in nature?
Equimolar solutions in the same solvent have
Same boiling point but different freezing point
Same freezing point but different boiling point
Same boiling and same freezing points
Different boiling and different freezing points
The molecular formula of phosphorous is:
Which one is an organic Acid ?
If α is the degree of dissociation of Na2SO4, the vant Hoff’s factor (i) used for calculating the molecular mass is:
1 + α
1 - α
1 + 2 α
1 – 2 α
How many nearest neighbours are there for an atom in a hexagonal close-packed crystal structure?
A catalyst is a substance which:
Increases the activation energy
Increases the rate of reaction and increases the equilibrium concentration of products
Changes the equilibrium of a reaction so that the concentration of the product increases
Hastens the attainment of equilibrium
What is the role of ultraviolet (UV) radiation in the water purification system? (1) It inactivates / kills the harmful micro- organisms in water. (2) It removes all the undesirable odours from the water. (3) It quickens the sedimentation of solid particles and improves the clarity of water. Which of the statements given above is/are correct?
2 and 3 only
1 and 3 only
1, 2 and 3
What is the degeneracy of the energy level with n = 6 in a hydrogenic atom or ion?
In the hooch tragedy (casualty occurring due to the wine poisoning) sometimes the incidents of blindness occurs due to the poisonous substance:
Which among the following happens in an oxidation reaction ?
Electrons are gained
Electrons are lost
Protons are gained
Protons are lost
Highest percentage of nitrogen is found in which among the following fertilizers among the given options?
Calcium ammonium nitrate
A nuclear magnetic resonance transition is shifted from the reference in a 400 MHz NMR spectrometer by 529 Hz. Calculate the chemical shift.
On a pressure-temperature phase diagram, the conditions under which a one-component system exists as two phases in equilibrium corresponds to:
The entire diagram
Group 0 elements are ____________.
Unreactive non metals
Reactive non metals
Due to rusting the weight of iron:
Remains the same
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