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The density of metal which crystallises in bcc lattice with unit cell edge length 300 pm and molar mass 50 g mol-1 will be

(A) 6.15 g cm-3 (B) 9.31 g cm-3 (C) 10.0 g cm-3 (D) 14.2 g cm-3 The Correct Answer is... View Article

Which of the following has the highest bond order?

(A) H2 (B) O2 (C) N2 (D) He2 The Correct Answer is (C) N2 Solution: Nitrogen (N2) has the highest... View Article

P is an aqueous solution of acid and Q is an aqueous solution of base. When these two are diluted separately, then:

(A) The pH of P and Q increases (B) The pH of P and Q decreases (C) The pH of... View Article

If two liquids A and B form minimum boiling azeotrope at some specific composition then:

(A) A-B interactions are weaker than those between A-A or B-B. (B) A-B interactions are stronger than those between A-A... View Article

Calculate the percentage by mole of NO2 in a mixture of NO2(g) and NO(g) having average molecular mass equal to 34?

(A) 20 % (B) 25 % (C) 40 % (D) 75 % The Correct Answer is (B) 25 % Solution:... View Article

Atoms of element B from HCP lattice and those of the element A occupy 2/3 rd of tetrahedral voids. What is the formula of the compound formed by the elements A and B?

(A) A1B1 (B) A2B1 (C) A3B2 (D) A4B3 The Correct Answer is (D) A4B3 Solution: As given in the question,... View Article

The ease of formation of free radicals follows which of the following order?

(A) 1° > 2° > 3° > CH3 (B) 2° > 1° > 3° > CH3 (C) 3° > 2°... View Article

If the concentration of hydrogen ion in a sample of soft drink is 3.8 * 10–3 m.What will be its pH?

(A) 2.42 (B) 2.82 (C) 3.08 (D) None Of These The Correct Answer is (A) 2.42. Solution: As given in... View Article

Two plots are shown below between concentration and time t. Which of the given orders are shown by the graphs respectively?

(A) Zero-order and first-order reaction (B) Zero-order and second-order reaction (C) Second-order and zero-order reaction (D) First-order and second-order reaction... View Article

Which of the following statement is true for an oxidation reaction?

(A) Removal of oxygen (B) Addition of oxygen (C) Removal of hydrogen (D) Both (B) and (C) The Correct Answer... View Article

What will be the ratio between the root mean square speed of H2 at 50 k and that of O2 at 800 k?

(A) 1 (B) 2 (C) 4 (D) 1/4 The Correct Answer is (A) 1 Solution: As we know, \(\begin{array}{l} v_{rms}... View Article

The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be:

(A) -51eV (B) -5.1eV (C) -255eV (D) -2.55eV The Correct Answer is (B) -5.1eV Solution: \(\begin{array}{l} Na\rightarrow Na^{+} + e^{-}... View Article

Which of the following statement explains why oxygen can be separated from nitrogen by the fractional distillation of liquid air?

(A) Oxygen is denser than nitrogen (B) Oxygen is more reactive than nitrogen (C) Both oxygen and nitrogen have different... View Article

A compound XY crystallizes in BCC lattice with unit cell edge length of 480 pm. If the radius of Y− is 225 pm. What will be the radius of X+

(A) 225 pm (B) 255 pm (C) 127.5 pm (D) 190.68 pm The Correct Answer is (D) 190.68 pm Solution:... View Article

The volume of air increases by 5% in its adiabatic expansion. The percentage decrease in its pressure will be:

(A) 6 % (B) 7 % (C) 8 % (D) 9 % The Correct Answer is (B) 7 % Solution:... View Article

Which of the following compound have sp3d2 hybridization?

(A) IF7 (B) ICl-2 (C) ICl-4 (D) BrF-2 The Correct Answer is (C) ICl-4 Solution: (A) IF7 — sp3d3 (B)... View Article

Although chlorine is an electron withdrawing group, yet it is ortho-, para- directing in electrophilic aromatic substitution reaction. Explain why it is so?

Solution: The electron-withdrawing inductive effect of chlorine withdraws electrons from a benzene ring and the negative charge accumulates at ortho-para... View Article

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