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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... 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 is (D) Both (B) and (C)... 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, For H_{2} at 50 K For O_{2} at 800 K... 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: Here IE = 5.1 eV Here the second reaction is... 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 boiling points (D)... 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: As we know, the sum of the ionic... 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: As we know: dQ = 0 Solving = constant By... 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) ICl-2 --- sp3d (D) BrF-2 --- sp3d... 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... View Article

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Archives

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

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

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

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

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

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+

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

Which of the following compound have sp3d2 hybridization?

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

For a free expansion of an ideal gas in an the isolated chamber which of the following statements is true?

Draw organic products formed in the following reaction

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