Chemistry Mock Test | General Science | BPSC

Q1. What unit is used to measure force in the SI system?

Joule Watt Newton Pascal

Q2. Consider the reaction: A → B ΔH = +100 kJ. What is the enthalpy change for the reaction 2A → 2B?

+50 kJ +100 kJ +200 kJ -100 kJ

Q3. Which is the correct IUPAC name for Hg2Cl2?

Mercury(II) chloride Mercury(I) chloride Mercury dichloride Dimercury dichloride

Q4. The element that forms the largest number of stable compounds with carbon is:

Nitrogen (N) Oxygen (O) Hydrogen (H) Silicon (Si)

Q5. Which of the following elements exhibits an anomalous behavior in its second ionization energy, deviating significantly from the general trend due to its electronic configuration?

Sodium (Na). Magnesium (Mg). Aluminum (Al). Silicon (Si).

Q6. Which of the following is an example of an alkene?

Ethane Ethene Ethyne Methane

Q7. A solution of a salt derived from a weak acid and a strong base will have a pH that is:

Less than 7 Equal to 7 Greater than 7 Dependent on the concentration of the salt

Q8. Dry ice is an example of which state of matter?

Liquid Gas Plasma Solid

Q9. The Franck-Condon principle states that electronic transitions are fast compared to nuclear motion. This means that during excitation:

The nuclei of the molecule can rearrange significantly. The nuclear positions and momenta remain approximately unchanged. The molecule vibrates strongly during excitation. The molecule dissociates immediately after absorption.

Q10. What is the safest way to store chemicals in a laboratory?

In a cool, dry, well-ventilated area, away from incompatible materials In direct sunlight Near heat sources Mixed together in a single container

Q11. The regioselectivity of electrophilic aromatic substitution on monosubstituted benzene rings is influenced by the electronic nature of the substituent. An activating group is typically:

Electron-withdrawing Electron-donating A halogen A deactivating group

Q12. What is the sum of the stoichiometric coefficients in the balanced equation for the complete combustion of propane ($\\text{C}_3\text{H}_8$)?

10 11 12 13

Q13. Which of the following is an example of a chelate complex?

[Co(NH3)3Cl3] [Fe(CN)6]4- [Cu(en)2]2+ [PtCl4]2-

Q14. If a reaction produces heat, it is described as:

Endothermic Exothermic Isothermic Adiabatic

Q15. Which thermodynamic process is characterized by constant volume?

Isothermal Adiabatic Isobaric Isochoric

Q16. The law of conservation of energy (First Law of Thermodynamics) states that energy cannot be created or destroyed, only transformed. In an exothermic reaction occurring in an isolated system, what happens to the internal energy of the system?

It increases It decreases It remains constant It is converted into mass

Q17. The reaction in which a substance loses oxygen or gains hydrogen is called:

Oxidation Reduction Combustion Esterification

Q18. Which of the following species has a bond order of 1?

N2 O2 F2 CO

Q19. Which element has the symbol 'Zn'?

Zirconium Zinc Xenon Yttrium

Q20. The Hund's rule states that electrons will fill degenerate orbitals singly with parallel spins before pairing up. In a nitrogen atom (atomic number 7), how many unpaired electrons are there?

1 2 3 0

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