Which of the following is not true ?

For preparing a buffer solution of pH 6 by mixing sodium acetate and acetic acid, the ratio of the concentration of salt and acid should be (K_a = 10^-5)

The electronegativity follows the order

The amine that does not react with acetyl chloride is

Which one of the following pairs of molecules will have permanent dipole moments for both members?

Dissolving 120 g of a compound of (mol. wt. 60) in 1000 g of water gave a solution of density 1.12 g/mL. The molarity of the solution is:

Complete hydrolysis of starch gives :

Which of the following is not formed when glycerol reacts with HI?

The structure and hybridization of Si(CH₃)₄ is

Addition of HI to double bond of propene yields isopropyl iodide and not n-propyl iodide as the major product, because addition proceeds throughs

The cell constant of a given cell is 0.47 cm^-1. The resistance of a solution placed in this cell is measured to be 31.6 ohm. The conductivity of the solution (in S cm^-1 where S has usual meaning) is

An example of Perkin’s reaction is

The value of the ‘spin only’ magnetic moment for one of the following configurations is 2.84 BM. The correct one is

The ether that undergoes electrophilic substitution reactions is

Consider the following changes

A→A⁺ + e^- : E₁ and A⁺→A+e^-  :

The energy required to pull out the two electrons
are E₁ and E₂ respectively. The correct
relationship between two energies would be

BCl₃ is a planar molecule whereas NCl₃ is pyramidal because

For a reaction of type A + B→ products , it is observed that doubling concentration of A causes the reaction rate to be four times as great, but doubling amount of B does not affect the rate. The rate equation is

An organic compound, C₃H₆O does not give a precipitate with 2, 4 dinitrophenyl-hydrazine reagent and does not react with metallic sodium. It could be

An element has bcc strucutre having unit cells 12.08×10²³. The number of atoms in these cells is

At 00 C and one atm pressure, a gas occupies 100 cc. If the pressure is increased to one and a half-time and temperature is increased by one third of absolute temperature, then final volume of the gas will be

A solution is prepared by mixing 8.5 g of CH₂Cl₂ and 11.95 g of CHCl₃. If vapour pressure of CH₂Cl₂ and CHCl₂ at 298 K are 415 and 200 mmHg respectively, the mole fraction of CHCl₂ in vapour form is :
(Molar mass of Cl = 35.5 g mol^-1)

From the following statements regarding H₂O₂, choose the incorrect statement :

The major organic compound formed by the reaction of 1, 1, 1-trichloroethane with silver powder is:

Which of the following is a redox reaction ?

Match list I with list II and select the correct answer using the codes given below the lists:

Beilstein’s test is given by which of the following

N₂ and O₂ are converted into monoanions, N₂^- and O₂^- respectively. Which of the following statements is wrong ?

Point out the false statement

In which of the following, resonance will be possible?

In a reaction A + B ⇌ C + D, the initial concentrations, of A and B were 0.9 mol dm^-3 each. At equilibrium the concentration of D was found to be 0.6 mol dm^-3 . What is the value of equilibrium constant for the reaction

Standard entropy of X₂, Y₂ and X Y₃ are 60, 40 and 50 J K^-1 mol^-1, respectively. For the reaction,

1/2X₂+3/2Y₂ →X Y₃ ΔH=–30kJ to be at equilibrium, the temperature will be

Which one of the following statement is not true

1.08 g of pure silver was converted into silver nitrate and its solution was taken in a beaker. It was electrolysed using platinum cathode and silver anode. 0.01 Faraday of electricity was passed using 0.15 volt above the decomposition potential of silver. The silver content of the beaker after the above shall be

The plot shows the variation of – ln K_p versus temperature for the two reactions

M(s) +1/2O₂(g) →MO(s) and C(s) 1/2O₂ (g) →CO(s)

Identify the correct statement:

The end product (C) in the following sequence of reactions is

CsCl crystallises in body centered cubic lattice. If ‘a’ is its edge length then which of the following expressions is correct?

An unknown metal M displaces nickel from nickel (II) sulphate solution but does not displace manganese from manganese sulphate solution. Which order represents the correct order of reducing power?

Indicate the wrongly named compound

Number of electrons transfered in each case when KMnO₄ acts as an oxidising agent to give MnO₂ ,Mn²⁺, Mn(OH)₃ and 24 MnO₄^2-  are respectively

The standard enthalpy of formation (Δ_fH°298) for methane, CH₄ is – 74.9 kJ mol–1. In order to calculate the average energy given out in the formation of a C – H bond from this it is necessary to know which one of the following?

At STP, the order of root mean square speed of molecules H₂, N₂, O₂ and HBr is

The radius of the second Bohr orbit for hydrogen
atom is :
(Plank's const. h = 6.6262 × 10^-34 Js ; mass of
electron = 9.1091 × 10^-31 kg ; charge of electron
e = 1.60210 × 10^-19 C ; permittivity of vaccum
Î0 = 8.854185 × 10^-12 kg^-1 m^-3 A²)

The compound A on heating gives a colourless gas. and a residue which dissolves in water to give B. When excess of CO₂ is passed into B and gently heated, A is formed. The compound A is

Which of the following is a biodegradable polymer ?

The activation energy for a hypothetical reaction, A → Product, is 12.49 kcal/mole. If temperature is raised from 295 to 305, the rate of reaction increased by