Which one of the following substances will decolourise alkaline KMnO4 solution?
Carbon atom holding in aryl halides is
Which is most soluble in water?
Acetylene reacts with ammonical silver nitrate to form
The energy of second Bohr orbit of hydrogen atom is -328 kJ mol-1, hence energy of fourth Bohr orbit would be
The H-spectrum shows
The most probable radius (in pm) for finding the electron in He⁺ is
The alkyl halide is converted into ethyl alcohol by
Pi bond is formed by the overlapping of
The second order rate constant is usually expressed as
Which of the following is not tetrahedral?
A chemical reaction will be spontaneous if it is accompained by a decrease of
Which of the following is true for an isochoric processes
The rate of forward reaction is two times that of the reverse reaction at a given temperature and identical concentration, K equilibrium is
The ΔH value for the reaction H2 + Cl2 → 2 HCl is − 44.12 K.cal. If E1 is the activation energy of the reactants and E2 is the activation energy of the products, then for the above reaction
Which of the following is used as an antiseptic?
Name of the compound as per IUPAC system is
The number of electrons required to deposit 1 g equivalent aluminium (At. wt. = 27) from a solution of aluminium chloride will be
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.
EN = (IP + EA)/2
The number of isomers exhibited by [Cr(NH₃)₃Cl₃] is
ChemicalA is used for water softening to remove temporary hardness. A reacts with Na₂CO₃ to generate caustic soda. When CO₂ is bubbled throughA, it turns cloudy. What is the chemical formula of A?
The value of gas constant per degree per mole is approximately
Wt. of 112 ml oxygen at NTP on liquification would be
Sodium conducts electricity because
Which one of the following reacts with conc. H₂SO₄?
Aluminium is extracted by the electrolysis of
Gun metal is an alloy of
The acid which forms two series of salts is
When I₂ is dissolved in CCl4 the colour that results is
Which of the following oxides reacts with HCl and NaOH?
The nitride salt of Ca when treated with H₂O gives
Which of the following has highest pH?
A metal which does not liberate H₂ (g) from acids
Sodium carbonate cannot be used in place of ammonium carbonate for the identification of the fifth group radicals . This is because the
If pH values of P, Q, R and S are 9.5, 2.5, 3.5 and 5.5 respectively, then the strongest acid is
Which of the following is the strongest acid ?
The property by virtue of which, a compound can turn the plane polarized light is known as
Unstable substances exhibit higher radioactivity due to
A cyclotron can not accelerate
Carbylamines are formed when chloroform and alcoholic KOH are heated with
Organic acid without a carboxylic acid group is
The most appropriate reagent to convrert
Which of the following reagent will convert Propanoic acid to Propan-1-ol?
Which does not contain conjugate system?
In dienes, when the double bonds connected to each other by a single bond, this arrangement is known as conjugated.
Conc. HNO3 forms NO2+ in presence of :
The co-ordination number of Fe(II) in oxyhaemoglobin
Phenol on reduction with H₂ in presence of nickel catalyst gives
Which of the following is a constituent of nylon?
In Kjeldahl's method ,nitrogen present is estimated as
In the chemical reaction Ag₂O + H₂O + 2e- → 2Ag + 2OH-
In a reaction between zinc and iodine, zinc iodide is formed, what is being oxidised?
Piezoelectric crystals are used in
1% solution of Ca(NO₃)₂ has freezing point
Equal volumes of 0.1 M AgNO₃ and 0.2 M NaCl are mixed. The concentration of NO₃- ions in the mixture will be
Which of the following can exhibit optical isomerism?
The ability of an ion to bring about coagulation of a given colloid depends on
The number of moles of oxygen in one litre of air containing 21% oxygen by volume, in standard conditions, is
Amount of O2 in 1 litre air = 21 % = 0.21 L .
∵ 22.4 L . of O2 = 1 mol
∴ 0.21 L of O2 = 1/22.4 x 0.21 mol = 0.0093 mol
Which has highest radii ?