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In which of the following conversions all the three oxygen atoms of O_(3) molecules are utilised for oxidation: I. Ferrous oxide to ferric oxide II. Acidified stannous chloride to stannic chloride III. Moist iodine to iodic acid VI. Sulphur dioxide to sulphur trioxide

In this reaction {:(CH_(3)CHO+HCN),(""darr),(CH_(3)CH(OH)CNoverset(H^(+)//OH^(-))rarrCH_(3)CH(OH)COOH):} as asymmetric centre is generated. The acid obtained would be

In which of the following conditions a chemical reaction can not occur

In this reaction C_(6)H_(5)NH_(2)+HCl+NaNO_(2)rarrX. Product X is

In which of the following compounds X is bonded to an sp^(2) carbon-

In this reaction, CH_(3)CHOtoCH_(3)CH(OH)Cnoverset(H*OH)toCH_(3)CH(OH)COOH An asymmetric centre is generated. The acid obtained would be

In which of the following compounds the ring on the left side undergoes electrophilic substitution reaction -

In which of the following complexes the nickel metal is in highest oxidation state:

In which of the following compounds, the periodicity of the definite formation is not observed ?

In this case we have A rarrB +C Time ""t" "prop Total pressure of A + B + C""P_(2)" " P_(3) Find k.

In which complex is the transition metal in zero. oxidation state:

In third row of periodic table the atomic radii from Na and Cl

In third group, iron gives blood red colouration with ammonium thiocyanate due to the formation of the compound?

In which of the following compounds the oxidation state of the nickel atom is zero,

In third group of qualitive analysis, NH_(4)Cl is added before NH_(4)OH so that

In third row of periodic table from Na to Cl

In which of the following compounds, the nucleophilic character of N - atom is maximum-

In thermodynamics which one of the following is not an intensive property

In thermite process the metal used as reducing agent is

In the Zn-Cu cell, when the concentrations of Zn^(2+) and Cu^(2+)are unity, the e.m.f. is

In the Victor-Meyer's test, the colours given by 1^(@), 2^(@), and 3^(@) alcohols are, respectively

In the vulcanisation of rubber:

In the Wacker process, the oxidation of ethyne to ethanol is catalysed by____________.

In the viscope process the solvent for cellulose consists of

In the Victor Meyer's method for the determination of molecular mass of an organic compound, what is measured ?

InthevanArkelprocess .........is usedto purify.............or........... .

In the use of Cl_2 as bleaching agent, the substance that is mainly responsible for the bleaching is

In the unsaturatedhydrocarbon compound have

In the upper layer of the atmosphere, ozone is formed by the:

In the upper layers of atmosphere, ozone is formed.

In the trinitrocellulose, each glucose unit contains how many-OH groups

In the unit-cell of NaCI lattice there are:

In the treatment of waste water discharge, which treatment stage involves biological treatment

In the transition series,starting from lanthanum (._(57)La), the next elements hafnium (._(72)Hf), has an atomicnumberof 72. Why do weobserve this jump in atomic number ?

In the transition series, with an increase in atomic number, the atomic radius does not change very much. Why is it so ?

In the transition series, with an increase in atomic number, the atomic radius does not change very much. Why is it so?

In the transformation of ""_(92)^(238)U to ""_(92)^(234)U, if one emission is an alpha-particle, what should be the other emission ?

In the transformation of ._(92)^(235)U " to " ._(92)^(234)U, if one emission is an alpha-particle, what should be the other emission (s)

In the titration of Cl^(-)ions in solution with AgNO_(3) sodium salt of fluorescein is used as an indicator. The equivalence point is marked with the appearance of reddish pink colour. This is due to

In the titration between oxalic acid and acidified potassium permanganate, the manganous salt formed during the reaction catalyses the reaction. The manganous salt acts as:

What is the action of hydrochloric acid on potassium permanganate ?

In the titratin of Fe^(2+) ions with KMnO_(4) in acidic medium, why dilute H_(2)SO_(4) is used and not dilute HCl ?

In the thermite process, the reducing agent is :

In the thermite process ______ is used as a reducing agent.

In the thermal refining silicates of which metals float as slag on copper ?

Inthethermiteprocess …………… isusedas areucingagent.

In the thermal dissociation fo PCl_(5). the partical pressure in the gaseous equlibrium mixture is 1.0 atmosphere when half of PCl_(5) is found to dissociate. The equlibrium constant of the reaction (K_(p)) in atomosphere is

In the thermal decomposition of N_(2)O" at "764^(@)C, the time required to decompose half the reactant was 263 seconds, when the initial pressure was 290 mm of Hg and 212 seconds at an initial pressure of 360 mm of Hg. What is the order of this reaction ?