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The correct set of quantum numbers for the unpaired electron of chlorine atom is
Which of the following reagents react differently with HCHO, CH₃CHO and CH₃COCH₃ ?
In hydrogen atom, energy of first excited state is -3.4 eV. Then find out the K.E. of the electron in the same orbit of hydrogen atom
Which of the following has the smallest number of molecules?
The pH of blood does not appreciably change by a small addition of an acid or a base because blood
Elimination of bromine from 2- bromobutane results in the formation of
To become a carbohydrate a compound must contain at least
The standard enthalpy of formation (∆f Ho) at 298 K for CH₄(g) is -74.8 KJ mol⁻1. The additional information required to determine the average energy of C-H bond would be
If a mixture containing 3 moles of hydrogen and 1 mole of nitrogen is converted completely into ammonia, the ratio of volumes of reactants and products at the same temperature and pressure would be
3H2 + N2 → 2NH3
∴ 3V 1V → 2V
Total initial volume = 3V + 1V = 4V
Final volume = 2V
Hence, ratio of initial and final volume will be 2 : 1
Let electronegativity, ionisation energy and electron affinity be represented as EN, IP and EA respectively. Which one of the following equation is correct according to Mulliken?
Electronegativity (EN) can be regarded as the average of the ionisation energy (IE) and the electron affinity (EA) of an atom.
Which of the following can possibly be used as analgesic without causing addiction and any modification?
ΔH = Total enthalpies of Reactant – Total enthalpies of product
Faraday's law of electrolysis states that mass deposited on electrode is proportional to
In which of the following molecules hydrogen is more acidic?
The hydrocarbon which decolourises alkaline KMnO₄ solution ,but does not give any precipitate with ammonical silver nitrate is
Under what conditions of temperature and pressure, the formation of atomic hydrogen from meolcular hydrogen will be favoured most?
The pH of blood does not appreciably change by a small addition of acid or a base because blood
The isomers, which possess same structural formula, but differ in spatial arrangement of the group around the double bond, are called
Chlorine is passed into dilute, cold KOH solution. What are the oxidation numbers of chlorine in the products formed?
What are the products formed when ammonia reacts with excess chlorine?
The high ionisation potential of noble gases is due to their
Bottles containing C6H5I and C6H5CH2I lost their original labels. They were labelled A and B for testing. A and B were separately taken in test tubes and boiled with NaOH solution. The end solution in each tube was made acidic with dilute HNO3 and then some AgNO3 solution was added. Substance B gave a yellow precipitate. Which one of the following statements is true for this experiment?
The total no. of electrons present in all the p-orbitals of bromine is
When sodium is treated with sufficient oxygen/air, the product obtained is
In a polymer 30% molecules have molecular weight 20,000, 40% molecules have molecular weight 30,000 and the rest 30% molecules have molecular weight 60000. The weight average molecular weight of the polymer is
A 0.6% solution of urea (molecular weight = 60) would be isotonic with
Liguid benzene burns in oxygen according to 2C6H6(l)+15O2(g) → 12CO2(g)+6H2O(g). How many litres of oxygen are required for complete combustion of 39 gm of liquid C6H6 (At. wt.of C=12,O=16)
A colloidal system in which gas bubbles are dispersed in liquid is known as