The order of basicity among the following compounds is:
The rate of the reaction A → products, at the initial concentration of 3.24 × 10–2 M is nine times its rate at another initial concentration of 1.2 × 10–3 M. The order of the reaction is:
For the reaction the value of rate of disappearance of is given as 6.25 × 10–3 mol L–1S–1. The rate of formation of NO2 and O2 is given respectively as:
In the synthesis of ammonia by Haber process, if 60 moles of ammonia is obtained in one hour, then the rate of disappearance of Nitrogen is:
For a first order reaction A → P, the temperature (T) dependent rate constant (k) was found to follow the equation The pre-exponential factor A and the activation energy Ea, respectively, are:
In the case of alkali metals, the covalent character decreases in the order:
Which of the following does not illustrate the anomalous properties of lithium
On heating anhydrous Na2CO3.........is evolved:
The chemical formula of sodium carbonate (washing soda) is Na2CO3. When it is heated it undergoes a thermal decomposition reaction. This takes place above 500 degree C. The reaction of decomposition is Na2CO3(s)→Na2O(s)+CO2(g)
The name of the first reaction product Na2O is Sodium Oxide which is solid and used in glass making and the name of the second reaction product is Carbon Dioxide which is a gas.
Which of the following sulphates have the highest solubility in water:
The element that does not show catenation among the following p-block elements is:
A quantity of 0.50 mole of an ideal gas at 20°C expands isothermally against a constant pressure of 2.0 atm from 1.0 L to 5.0 L. Entropy change of the system is:
Given the molecular formula of the hexa-coordinated complexes (A) CoCl3.6NH3 (B) CoCl3.5NH3 (C) CoCl3.4NH3. If the number of coordinated NH3 molecules in A, B and C respectively are 6, 5 and 4 the primary valency in (A), (B) and (C) are:
Ketones react with Mg-Hg over water gives
Which one of the following statement for order of reaction is not correct:
t1/4 can be taken as the time taken for the concentration of a reactant to drop to 3/4 of its initial value. If the rate constant for a first order reaction is K, the t1/4 can be written as:
The compound that undergoes decarboxylation most readily under mild condition is:
Consider the acidity of the carboxylic acids:
(I) PhCOOH
(II) o-NO2C6H4COOH
(III) p-NO2C6H4COOH
(IV) m-NO2C6H4COOH
Which of the following order is correct:
Starting with one mole of a compound A it is found that the reaction is 3/4th complete in one hour. If the reaction is first order, the rate constant is:
Find the organic acid produced from the below reaction:
The diketone on intramolecular aldol condensation gives the final product.
Nitrogen forms how many oxide?
Which of the following does not have optical isomer
Which one is not correct:
Which of the following complex ions is expected to absorb visible light:
The reaction [Fe(CNS)6]3– → [FeF6]3– takes place with
The crystal field stabilization energy (CFSE) is the highest for:
Higher the oxidation state of the metal, greater the crystal field splitting energy . In options (a), (b) and (d), Co is present in +2+2 oxidation state and in (c ) it is present in +3+3 oxidation state and hence has a higher value of CFSE.
The product X is
An optically active compound having molecular formula C8H16 on ozonolysis gives acetone as one of the products. The structure of the compound is:
The major organic product formed from the following reaction:
For the redox reaction
The correct coefficients of the reaction for the balanced reaction are:
For a first order reaction:
The following statement(s) is(are) correct:
For the first order reaction
2N2O5(g) → 4NO2 (g) + O2 (g)
The rate of law for the reaction
RCI + NaOH → ROH + NaCl
is given by rate = k[RCl]. The rate of this reaction
For the reaction
The correct statement(s) in the balanced equation is/are:
Reduction of the metal centre in aqueous permangnate ion involves:
In the reaction of sodium thiosulphate with I2 in aqueous medium the equivalent weight of sodium thiosulphate is equal to:
In which of the following arrangements the sequence is not strictly according to the property written against it:
Which one of the following is wrongly matched:
Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal Ni(II). Which of the following statement is/are true:
If the activation energy for the forward reaction is 150 kJ mol–1 and that of the reverse reaction is 260 kJ mol–1, what is the enthalpy change (kJ mol–1) for the reaction:
The rate of a reaction is doubled for every 10°C rise in temperature. The increase in reaction rate as a result of temperature rise from 10°C to 100°C is:
Cyclopropene rearranges to form propene
This follows first order kinetics. The rate constant is 2.714 × 10–3 sec–1. The initial concentration of cyclopropane is 0.29 M. What will be the concentration (M) of cyclcopropene after 100 sec:
A gaseous hypothetical chemical equation 2A → 4B +C is carried out in a closed vessel. The concentration of B is found to increase by 5 × 10–3 mol l–3 in 10 second. The rate of appearance of B is(mol l–3 sec–1):
1 mole of an ideal gas for which CV = 3/2 R is heated reversibly at a constant pressure of 1 atm from 25°C to 100°C. The ΔH(cal) is:
The number of isomers possible for distributed borazine, B3N3H4X2 is:
The possible number of optical isomers in [Co(en)2Cl2]+ are:
The magnetic moment of a transition metal ion is BM. Therefore the number of unpaired electrons present in it is:
The spin only magnetic moment value (in Bohr magneton units) of Cr(CO)6 is:
The total number of possible isomers for the complex compound [CuII(NH3)4][PtIICl4] are:
The decomposition of Proceeds as a first order reaction with a half-life period of 30 seconds at a certain temperature. If the initial concentration [N2O5] = 0.4 M, what is the rate constant of the reaction(sec-1):
If a substance with half life 3 days is taken at other place in 12 days. What amount of substance is left now:
The rate of reaction between two reactants A and B decreases by a factor of 4 if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is:
The rate of disappearance of SO2in the reaction 2SO2 + O2 → 2SO3 is 1.28 × 10–3 g/sec then the rate of formation (g/sec) of SO3 is:1.28 × 10–3
Number of P-O bonds in P4O10 is:
From figure it is clear that we have 12 P-O and 4 P=O bonds.
Heat obtained due to expansion of 1 mole of H2 gas at 1000 K from 10 L to 100 L under isothermal reversible condition is absorbed by an engine having a sink at 300 K. Useful work (cal) obtained is:
At constant pressure 200 g of water is heated from 10°C to 20°C. Thus, increase in entropy is (molar heat capacity of water (Joules) at constant pressure is 75.3 JK–1 mol–1):
Carnot cycle is said to have 25% efficiency when it operates between T (source) and 300 K (sink), Temperature T is (in K):
The value of log10 K for the reaction A <=> B is (Given, ΔtH°298 K = – 54.07 kJ mol–1, ΔtS°298 K = 10 JK–1 mol–1, R = 8.314 JK–1 mol–1; 2.303 × 8.314 × 298 = 5705):
1 mole of an ideal gas is allowed to expand reversibly and adiabatically from a temperature of 27°C. The work done is 3 kJ. The final temperature (K) of the gas is equal to (CV = 20 J mol–1K–1):
Doc | 11 Pages
Video | 17:26 min
Test | 60 questions | 180 min
Test | 60 questions | 180 min
Test | 60 questions | 180 min
Test | 30 questions | 90 min
Test | 60 questions | 180 min