According to Collision Theory, the rate constant of a chemical reaction depends on activation energy. If the activation energy of a reaction increases, then the value of the rate constant \(k\) will:

• (A) Increase exponentially
• (B) Remain unchanged
• (C) Decrease exponentially
• (D) Become zero

For a first order reaction, the time required for completion of 75% of the reaction is 40 minutes. The half-life of the reaction is:

• (A) 10 min
• (B) 20 min
• (C) 40 min
• (D) 80 min

The standard electrode potential of zinc electrode is -0.76 V and that of copper electrode is +0.34 V. The standard EMF of the Daniell cell is:

• (A) 0.42 V
• (B) 1.10 V
• (C) 0.76 V
• (D) 1.52 V

The Nernst equation for a half-cell reaction at 298 K is:

• (A) \(E = E^\circ - \frac{0.0591}{n} \log Q\)
• (B) \(E = E^\circ + \frac{0.0591}{n} \log Q\)
• (C) \(E = E^\circ - \frac{n}{0.0591} \log Q\)
• (D) \(E = E^\circ + \frac{n}{0.0591} \log Q\)

The violet colour of \(KMnO_4\) solution is due to:

• (A) d \(-\) d transition
• (B) Charge transfer transition
• (C) Presence of unpaired electrons
• (D) Hybridization

For the reaction:

2A \(\rightarrow\) Products


the rate law is:

Rate = \(k[A]^2\)


If the concentration of A is doubled, the rate of reaction will become:

• (A) Doubled
• (B) Four times
• (C) Half
• (D) Unchanged

The IUPAC name of the compound
\(CH_3-CH(CH_3)-CH_2-OH\)


is:

• (A) Propan-1-ol
• (B) 2-Methylpropan-1-ol
• (C) Butan-2-ol
• (D) 2-Methylpropan-2-ol

The number of sigma (\(\sigma\)) and pi (\(\pi\)) bonds respectively in ethene molecule are:

• (A) 4\(\sigma\), 1\(\pi\)
• (B) 5\(\sigma\), 1\(\pi\)
• (C) 6\(\sigma\), 1\(\pi\)
• (D) 5\(\sigma\), 2\(\pi\)

The hybridization of carbon atom in \(CH_4\) molecule is:

• (A) sp
• (B) \(sp^2\)
• (C) \(sp^3\)
• (D) \(dsp^2\)

Which of the following solutions will conduct electricity most effectively?

• (A) Glucose solution
• (B) Urea solution
• (C) Sodium chloride solution
• (D) Sugar solution