IIT JAM Chemistry - MCQ Test 2

Which of the following magnetic moment values will correspond to highest ionization energy form Mn species:

For the reaction   

Then relation between k₁, k₂ and k₃ is 

Efficiency of Carnot’s engine is 100 % when

Arrange the following compounds in order of Ca—Cb bond length:

All the following are the resonance structure of one another except:

Bombardment of aluminium by α-particle leads to its artificial disintegration in two ways (i) and (ii) as shown. Product X, Y and Z respectively are:

Heat of dissociation of CH₃COOH is 0.005 kcal g^-1, hence enthalpy change when 1 mole of Ca(OH)₂ is completely neutralized by CH₃COOH is:

The heat released on neutralization of CsOH with all strong acids is 13.4 kcal mol^-1. The heat released on neutralization of CsOH with HF (weak acid) is 16.4 kcal mol^-1. ΔH° of ionization of HF in water is:

At low pressure, that Vander Waal’s equation is reduced to:

Correct order of stability of the following carbocation is:

The decay modes of ¹⁴C and ¹⁴O are:

If 3/4 quantity of a radioactive element disintegrates in two hours its half- life would be:

What is the stereochemical relationship between the following compound:

Among the structures given below, the most stable conformation for the following compound is:

Following configuration of the tartaric acid represents:

The gauche conformation (θ = 60°) of n-butane possess:

Rate of formation of SO₃ in the following reaction

is 100g min^-1. Hence, rate of disappearance of O₂ is:

Any gas shows maximum deviation from ideal gas at:

The de-Broglie wavelength of the electron in the ground state of hydrogen atom is ? Given: KE = 13.6 eV, 1 eV = 1.6*10 ^-19J.

For a first order homogenous gaseous reaction, then initial pressure was P, while total pressure after time ‘t’ was P_t. The write expression for the rate constants k in terms of P_i, P_t and t is:

In which of the following reactions, hydrogen peroxide acts as on oxidizing agent:

Heat of neutralization of H₂C₂O₄ (oxalic acid) is - 2 6 kcal mol^-1. Hence dissociation energy of:

Which is the correct order of dipole moments of the compounds:

Which carbocation is the most stabilized:

Nodal plane in the π bond is located in:

The correct order of increasing bond angles in the following triatomic species  

The schrodinger wave equation for hydrogen atom is:

where a_o is Bohr radius. Find position of radial node.

For the reaction: H₃PO₃ + Ba(OH)₂  → BaHPO₃ + 2H₂O The correct statement(s) is/are

Select incorrect statement(s):

Which of the following set(s) of quantum numbers is(are) not allowed:

A radioactive element X emits α-particles followed by 2 p-particles in the successive steps as:

Which of the following statement(s) is/are correct?

Identify which of the structures below are meso structures:

Select the correct statements, out of I, II and III for zeroth order reaction.
(I) Quantity of the product formed, is directly proportional to time.
(II) Larger the initial concentration of the reactant greater the half-life period
(III) If 50% reaction takes place in 100 min, 75% reaction take place in 150 min.

Which is/are correct statements):

The enthalpy of neutralization of which of the following acids and bases is nearly -13.6 kcal:

The following is (are) endothermic reaction:

Hydrogen bonding plays a central role in the following phenomena:

What is the strength (in g/litre) of a solution of H₂SO₄, 12 mL of which neutralized 15 mL of N/10 NaOH solution:

In an ideal monoatomic gas, the speed of sound is given by . If the speed of sound in argon at 25°C us 1245 km h^-1, the root mean square velocity (in ms^-1) is...........?

Volume (mL) of H₂C₂O₄. 2H₂O solution to prepare 0.10 M from 1.575g of it is ?

The effective nuclear charge of helium atom is 1.7. The first ionization energy of helium atom (in eV) is ....... ? 

The standard molar enthalpy of formation of molecular oxygen at 298 K is zero. Thus its value  (in KJ/mol) at 315 K is...... ? Given 

The amount of heat (in kJ) evolved when 500 cm³ of 0.1 M HCl is mixed with 200 cm³ of 0.2M NaOH is.......?

Find out the double bond equivalent (DBE) value of the given following compound:

A mixture of 50.0 mL o f NH₃ and 60.0 mL of O₂ gas reacts as

If all the gases are at the same temperature and pressure and the reaction continuous until one of the gases is completely consumed, what volume (in mL) of water vapour is produced.

How many of the following inter halogen species have 2 lone pairs of electrons on the central atom? ClF₃, ClF₂^-, CIF₅ ICl₂^- and XeF₂

For the radioactive isotope ¹³¹I, the time required for 50% disintegration is 8 days. The time required for the 99.9% disintegration of 5.5g of ¹³¹I is __________ days, (up to one decimal place):

The number of resonance structures for the compound is: 

The standard enthalpy of formation of NH3 is -4 6 .0 kJ mol ^-1. If the enthalpy of formation of H₂ from its atoms is —436 kJ mol ^-1 and that of N₂ is -712 kJ mol the average bond enthalpy of N—H bond in NH₃ is: (in kJ/mol)

The ΔH° for the reaction at 400 K in kJ mol^-1 is ___________________.

Given at 298 K:

One mole of Al₄C₃(s) reacts with H₂O in a closed vessel at 27°C against atmospheric pressure. Work done (in cal) is....?

The total number of compounds which show -M effects:

;   ; 
; 

What will be the longest wavelength line in Balmer’s series of spectrum: (in nm)

N₂ + 3H₂ —> 2NH₃. 1 mole N₂ and 4 moles H₂ are taken in 15 L flask at 27°C. After complete conversion of N₂ into NH₃, 5L of H₂O is added. Pressure set up in the flask is: (in atm)

The potential energy of an electron in the first Bohr orbit in the He⁺ ion is: (in eV)

At equilibrium, number of atoms disintegrating at two different stages are in the ratio of 1:10. If the half-life of first stage is 15 minutes, half-life second stage would be: (in min)

Among the following, the number of anhydrides of acids are.
CO, NO, B₂O₃, N₂O₅, SO₃, P₄O₁₀, SO₂