Chemistry Nios plus two Welcome to your Chemistry Nios plus two Total Questions: 18 Name Mobile No: 1. The boiling points of hydrides of group 16 are in the order H2O > H2S > H2Se > H2Te H2O > H2Te > H2Se > H2S None of these H2O > H2Te > H2S > H2Se None Hint 2. Which of the following aqueous solutions will have highest pH? CH3COONa NH4Cl NaCl Na2CO3 None Hint 3. Maximum number of electrons in a subshell can be 2l + 1 4. 2n2 4l – 2 4l + 2 None Hint 4. H2S is more acidic than H2O because Atomic number of Sulphur is higher than oxygen. H — O bond dissociation energy is less also compared to H — S bond. Oxygen is more electronegative than Sulphur. H — S bond dissociation energy is less as compared to H — O bond. None Hint 5. Which has the lowest boiling point at 1 atm pressure? 0.1 M A1Cl3 0.1 M CaCl2 0.1 M Urea 0.1 M KCl None Hint 6. In the manufacture of sulphuric acid by contact process Tyndall box is used to Filter dust particles Remove impurities Convert SO2 and SO3 Test the presence of dust particles None Hint 7. What is the pH of a 0.10 M solution of barium hydroxide, Ba (OH)2? None of these 11.7 13.30 11.31 None Hint 8. The pH of a 10-10 M NaOH solution is nearest to 7 4 10 -10 None Hint 9. MX6 is a molecule with octahedral geometry. How many X – M – X bonds are at 180°? Six Four Two Three None Hint 10. H2S is more acidic than H2O because. Atomic number of sulphur is higher than oxygen. Oxygen is more electronegative than sulphur. H — O bond dissociation energy is less also compared to H — S bond. H — S bond dissociation energy is less as compared to H — O bond. None Hint 11. A gas X has Cp and CV ratio as 1.4, at NTP 11.2 L of gas X will contain_______ number of atoms 2.01 × 102 6.02 × 1023 1.2 × 1023 3.01 × 1023 None Hint 12. Third law of thermodynamics provides a method to evaluate which property? Absolute Enthalpy Absolute Energy Absolute Free Energy Absolute Entropy None Hint 13. The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows. No deviation from Raoult’s Law. Negative deviation from Raoult’s Law. Positive deviation from Raoult’s Law. That the solution is unsaturated None Hint 14. The orientation of atomic orbital’s depends on their Magnetic quantum number Azimuthal quantum number Principal quantum number 5 Spin quantum number None Hint 15. Which of the following oxides is not expected to react with sodium hydroxide? CaO B2O3 5 SiO2 Beo None Hint 16. Molecules are held together in a crystal by Van der Waal’s attraction Electrostatic attraction Hydrogen bond Dipole-dipole attraction None Hint 17. One mole of which of the following has the highest entropy? Mercury Diamond Liquid Nitrogen Hydrogen Gas None Hint 18. Find the molecule with the maximum dipole moment NH3 CH4 CO2 NF3 5. None Hint Time's up Share: admin Previous post Hindi Nios Plus Two PQ - II June 21, 2025 Next post English Nios Plus Two June 23, 2025
