Chemistry MCQs Test 07 Online Preparation Leave a Comment / Chemistry Test / By Shani Malik Chemistry MCQs Test 07 Online Preparation 1. Atomic number of Mn is 25 what is the electronic configuration in the ground state ?A. 1s2 2s2 2p6 3s2 3p6 4s2 4p5B. 1s2 2s2 2p6 3s2 3p6 3d7C. 1s2 2s2 2p6 3s2 3p6 4s23d5D. 1s2 2s2 2p6 3s2 3p5 3d10 Loading... 2. When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is ?A. 0.33 nmB. 0.35 nm C. 0.34 nmD. 0.36 nm Loading... 3. Which of the following is mineral fiber.A. asbestosB. teflonC. acrylicD. saran Loading... 4. Which of the following statement is correct ?A. size of Na atom < Na+ ionB. Cl- < Na+C. size of Na+ ion < Na atomD. size of Cl atoms > Cl- ion Loading... 5. When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained ?A. 3B. 2C. 1D. 4 Loading... 6. Which of the following is mineral fiber.A. asbestosB. acrylicC. teflonD. saran Loading... 7. Which statement is consistent with Hunds rule.A. There is maximum of two electrons is an orbitalB. Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spinC. The electrons in the same atom cannot have the same four quantum numbersD. None Loading... 8. Which catalyst is used in contact process?A. Fe2O3B. SO3C. Ag2OD. V2O5 Loading... 9. On heating aldehydes with Fehlings solution we get a precipitate whose colour is ?A. brick redB. yellow C. pinkD. black Loading... 10. What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3A. 6B. 2C. 8D. 4 Loading... Loading... Related NTS Results Post:Chemistry MCQs Test 05 Online PreparationChemistry MCQs Test 06 Online PreparationBiology Mcqs Test 09 Online PreparationBiology Mcqs Test 08 Online PreparationBiology Mcqs Test 06 Online PreparationBiology Mcqs Test 07 Online PreparationBiology Mcqs Test 11 Online PreparationIslamiat Mcqs Test 01 Online Preparation