Chemistry Mock Test

The number of moles in 22.4 L of an ideal gas at STP is ||| 0.5 mol ||| 1 mol ||| 2 mol ||| 22.4 mol ||| 2 The atomic number of an element is equal to ||| Number of neutrons ||| Mass number ||| Number of protons ||| Number of electrons + neutrons ||| 3 The shape of \( \text{CH}_4 \) molecule is ||| Linear ||| Tetrahedral ||| Trigonal planar ||| Octahedral ||| 2 Which of the following is a strong electrolyte? ||| Glucose ||| Urea ||| NaCl ||| Acetic acid ||| 3 The bond order of \( \text{O}_2 \) molecule is ||| 1 ||| 2 ||| 3 ||| 2.5 ||| 2 Which gas evolves during the reaction of zinc with dilute HCl? ||| \( \text{O}_2 \) ||| \( \text{H}_2 \) ||| \( \text{CO}_2 \) ||| \( \text{N}_2 \) ||| 2 Which of the following is not a colligative property? ||| Boiling point elevation ||| Freezing point depression ||| Osmotic pressure ||| Refractive index ||| 4 The pH of a neutral solution at 25°C is ||| 0 ||| 7 ||| 14 ||| 1 ||| 2 In an exothermic reaction, the enthalpy of products is ||| Greater than reactants ||| Equal to reactants ||| Less than reactants ||| Infinite ||| 3 The unit of rate constant for a first-order reaction is ||| \( \text{mol}^{-1} \, \text{L} \, \text{s}^{-1} \) ||| \( \text{s}^{-1} \) ||| \( \text{mol} \, \text{L}^{-1} \, \text{s}^{-1} \) ||| \( \text{L}^2 \, \text{mol}^{-2} \, \text{s}^{-1} \) ||| 2 The oxidation number of Fe in \( \text{Fe}_2\text{O}_3 \) is ||| +2 ||| +3 ||| -2 ||| 0 ||| 2 Which element has the highest electronegativity? ||| Fluorine ||| Oxygen ||| Nitrogen ||| Chlorine ||| 1 Which of the following is not an isomer of \( \text{C}_4\text{H}_{10} \)? ||| n-butane ||| isobutane ||| cyclobutane ||| None of these ||| 3 Which hybridization is present in the carbon of ethyne (\( \text{C}_2\text{H}_2 \))? ||| \( sp^3 \) ||| \( sp^2 \) ||| \( sp \) ||| None ||| 3 Which of the following is aromatic? ||| Cyclohexane ||| Benzene ||| Cyclopentane ||| Butene ||| 2 Which of the following ions is colorless in aqueous solution? ||| \( \text{Cu}^{2+} \) ||| \( \text{Fe}^{2+} \) ||| \( \text{Zn}^{2+} \) ||| \( \text{Ni}^{2+} \) ||| 3 Which compound gives a positive Tollen’s test? ||| Ethanol ||| Acetone ||| Formaldehyde ||| Acetic acid ||| 3 Electrode potential of a metal depends on ||| Its atomic number ||| Position in periodic table ||| Tendency to lose electrons ||| Melting point ||| 3 Which of the following helps in the coagulation of a colloid? ||| Heating ||| Adding electrolyte ||| Shaking ||| Cooling ||| 2 The number of valence electrons in phosphorus is ||| 3 ||| 5 ||| 7 ||| 15 ||| 2