Which of the following will not from a yellow precipitate on heating with an alkaline solution of iodine?
Schiff's reagent is
Ascorbic acid is a chemical name of
The IUPAC name of (C2H5)4C is
When H₂S gas is passed through the HCl containing aqueous solution of CuCl₂, HgCl₂, BiCl₃ and coCl₂, it does not precipitate out
Heaviest particle is
The greater the s- character in an orbital the ... is its energy
The greater the s- character in an orbital, the shorter is the bond and greater is its strength. Thus, bond formed by sp hybridisation , as in acetylene is stronger as compare to ethane and ethene , because it has maximum bond energy.
Electrophile in the case of chlorination of benzene in presence of FeCl₃ is
Sulphuric acid provides a simple example of
Which of the following is aromatic?
The acid showing salt like character in aqueous solutions is
60 J of heat flows out from 600 g of water at 30°C into surroundings at 25°C.The net entropy change in universe is approximately
A catalyst is used to
A glass bulb is filled with NO₂ gas and immersed in an ice bath at 0°C which becomes colourless after some time . This colourless gas will be
Calculate the heat of formation Δ H of CO (in kcal) from the following data :
C(graphite) + O2(g) → CO2 (g); ΔH = -94K. cal
CO(g) + (g) → CO2 (g) ; ΔH = -68K. cal
Aspirin is an acetylation product of
Which one of the following reactions occur at the cathode?
The IUPAC name of
The lightest metal is
Lithium is lightest among all the metals with density 0.534 g/cm3.
One mole of argon gas will have least density at
Which of the following applies to the reaction,
1. CH₃CH = CHCH₃(major product)
2. CH₂ = CH − CH₂CH₃(minor product)
A compound having the formula NH₂CH₂COOH may behave
A symmetrical molecule has 2 chiral carbon atoms. The no. of isomers is
C-14 has a half-life of 5760 years. 100 mg of a sample containing C-14 is reduced to 25 mg in
Lacrymotor or tear gas is
Aniline reacts with concentrated HNO₃ to give :
Which is incorrect representation?
In Duma's method, the gas which is collected in Nitrometer is
Which of the following is used for making horses, shoe heels and stoppers?
The oxidation number of Pt in [Pt(C₂H₄)Cl₃]- is
Which of the following describes the hexagonal close packed arrangement of spheres?
If 100 ml of 1 N sulphuric acid were mixed with 100 ml of 1 M sodium hydroxide, the solution will be
The number of moles of H₂ in 0.224 L of hydrogen gas at STP (273 K, 1atm. assuming ideal gas behaviour is
The empirical formula of an organic compound containing carbon and hydrogen is CH2. The mass of one litre of this organic gas is exactly equal to that of one litre of nitrogen. Therefore the molecular formula of the organic gas is
When H₂S is passed through nitric acid, the product is