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A mixture of one mole each of H₂, He and O₂ each are enclosed in a cylinder of volume V at temperature T. If the partial pressure of H₂ is 2 atm, the total pressure of the gases in the cylinder is:

1) 6 atm 2) 14 atm 3) 38 atm 4) 22 atm Answer: (1) pH2 = 2 atm = xH2... View Article

The compound A in the following reactions is:

Answer: (1)

The strengths of 5.6 volume hydrogen peroxide (of density 1 g/mL) in terms of mass percentage and molarity (M), respectively, are: (Take the molar mass of hydrogen peroxide as 34 g/mol)

1) 0.85 and 0.5 2) 0.85 and 0.25 3) 1.7 and 0.25 4) 1.7 and 0.5 Answer: (4) Volume strength... View Article

Consider the following molecules and statements related to them:

(a) (B) is more likely to be crystalline than (A) (b) (B) has a higher boiling point than (A) (c)... View Article

The d-electron configuration of [Ru(en)₃]Cl₂ and [Fe(H₂O)₆]Cl₂, respectively are:

1) t42g e2g and t62g eog 2) t62g eog and t62g eog 3) t42g e2g and t42g e2g 4) t62g... View Article

Consider the hypothetical situation where the azimuthal quantum number, l, takes values 0, 1, 2, …… n + 1, where n is the principal quantum number. Then, the element with atomic number:

1) 13 has a half-filled valence subshell 2) 9 is the first alkali metal 3) 8 is the first noble... View Article

100 mL of 0.1 M HCl is taken in a beaker and to it, 100 mL of 0.1 M NaOH is added in steps of 2 mL and the pH is continuously measured. Which of the following graphs correctly depicts the change in pH?

Answer: (3) initially pH will be acidic < 7 at eq pH pH = 7 & finally pH will be... View Article

The incorrect statement(s) among (a) – (d) regarding acid rain is (are):

(a) It can corrode water pipes. (b) It can damage structures made up of stone. (c) It cannot cause respiratory... View Article

The increasing order of the reactivity of the following compounds in nucleophilic addition reaction is: Propanal, Benzaldehyde, Propanone, Butanone

1) Benzaldehyde < Propanal < Propanone < Butanone 2) Propanal < Propanone < Butanone < Benzaldehyde 3) Butanone < Propanone... View Article

The decreasing order of reactivity of the following compounds towards nucleophilic substitution (S_N2) is:

1) (III) > (II) > (IV) > (I) 2) (IV) > (II) > (III) > (I) 3) (II) > (III)... View Article

Complex A has a composition of H₁₂O₆Cl₃Cr. If the complex on treatment with conc. H2SO4 loses 13.5% of its original mass, the correct molecular formula of A is: [Given: the atomic mass of Cr = 52 amu and Cl = 35 amu]

1) [Cr(H2O)5Cl]Cl2 .H2O 2) [Cr(H2O)4Cl2]Cl.2H2O 3) [Cr(H2O)3Cl3].3H2O 4) [Cr(H2O)6]Cl3 Answer: (2) Let x molecule of water are lost then 13.5... View Article

Among the statements (I–IV), the correct ones are:

(I) Be has a smaller atomic radius compared to Mg. (II) Be has higher ionization enthalpy than Al. (III) Charge/radius... View Article

An ionic micelle is formed on the addition of

1) liquid diethyl ether to aqueous NaCl solution 2) sodium stearate to pure toluene 3) excess water to liquid 4)... View Article

Match the following drugs with their therapeutic actions:

(i) Ranitidine (a) Antidepressant (ii) Nardil (Phenelzine) (b) Antibiotic (iii)Chloramphenicol (c) Antihistamine (iv) Dimetane (Brompheniramine) (d) Antacid (e) Analgesic 1)... View Article

The five successive ionization enthalpies of an element are 800, 2427, 3658, 25024 and 32824 kJ mol^–1. The number of valence electrons in the element is:

1) 2 2) 4 3) 3 4) 5 Answer: (3) Fourth & Fifth I.E. are very high (periodic properties) indicating... View Article

In connection with the circuit drawn below, the value of current flowing through the 2kΩ resistor is _______ × 10^–4 A.

Answer: 25 In zener diode there will be o change in current after 5V Zener diode breakdown ⇒ i =... View Article

An unpolarized light beam is incident on the polarizer of a polarization experiment and the intensity of the light beam emerging from the analyzer is measured as 100 Lumens. Now, if the analyzer is rotated around the horizontal axis (direction of light) by 30° in clockwise direction, the intensity of emerging light will be________ Lumens.

Answer: 75 Given: I0 = 100 lumens, θ = 30o Inet = I0 cos2θ Inet = 100 × (√3/2)2 =... View Article

A common transistor radio set requires 12 V (D.C.) for its operation. The D.C. source is constructed by using a transformer and a rectifier circuit, which are operated at 220 V (A.C.) on standard domestic A.C. supply. The number of turns of the secondary coil are 24, then the number of turns of the primary are ______.

Answer: 440 Given, Primary voltage, Vp = 220 V Secondary voltage, vs = 12 V No. of turns in secondary... View Article

A hydraulic press can lift 100 kg when a mass ‘m’ is placed on the smaller piston. It can lift _______ kg when the diameter of the larger piston is increased by 4 times and that of the smaller piston is decreased by 4 times keeping the same mass ‘m’ on the smaller piston.

Answer: 25600 Atmospheric pressure P0 will be acting on both the limbs of the hydraulic lift. Applying pascal’s law for... View Article

An electromagnetic wave of frequency 5 GHz, is travelling in a medium whose relative electric permittivity and relative magnetic permeability both are 2. Its velocity in this medium is _______ × 10⁷ m/s.

Answer: 15 Given: f = 5 GHz εr =2 μr = 2 Velocity of wave ⇒ v = c /... View Article

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