NMDCAT Chapter 2 Practice TestAttempt your Practice test and see the results to know your preparation level. 82 Dear Students 25 minutes are given to solve 25 MCQs.Your result will be displayed at the end of the quiz. Created by Umair Ali khan NMDCAT Chemistry Chapter 2 Practice Test 1 / 251) A hypothetical element carrying a -2 charge contains 27 electrons and 50 mass number. Its atomic number will be a) 25 b) 26 c) 27 d) 24 2 / 252) Positive rays are produced a) by burning of gas b) By cooling of the gas c) By the bombardment of cathode rays on gas molecules d) From anode like cathode rays, produced from cathode 3 / 253) When an atom goes in excited state it violates a) Aufbau principle b) Hund's rule c) Pauli's exclusion principle d) All of these 4 / 254) The electron in K-Shell can be distinguish by a) Principal quantum number b) Azimuthal quantum number c) Magnetic quantum number d) Spin Quantum number 5 / 255) Which of the following is true relationship between principal and azimuthal quantum number? a) n is equal to l b) n is larger than l c) n is smaller than l d) n is equal to +1 6 / 256) An element X has the configuration 1s², 2s², 2p5.. In its chemical reactions it is most likely to a) Gain three electrons b) Lose one electron c) Lose three electrons d) Gain one electron 7 / 257) λ of indigo colour is 400nm approximately. The wave number of the above-mentioned colour will be. a) 400 x 10-9m-1 b) 2.5 x 10+6m-1 c) 2.5 x 10-5m-1 d) 2.5 x 10-4m-1 8 / 258) The number of orbitals accommodated in the nth energy level is given by a) n+2 b) 2n c) 2n2 d) n2 9 / 259) The nature of canal rays depends upon a) Composition of glass b) Composition of electrode c) Gas inside the discharge tube d) All of these 10 / 2510) The correct set of quantum numbers for the valance electron of Na is a) n = 3 l= 2 m=0 S = +1/2 b) n = 3 l=0 m=0 S=+1/2 c) n=3 l=2 m=0 S = -1/2 d) n = 3 l=2 m = +1 S = +1/2 11 / 2511) The quantum of energy is called photon in the case of a) Heat b) Sound c) Wave d) Light 12 / 2512) The atomic number of an element having maximum number of unpaired electrons in p-subshell, is a) 7 b) 10 c) 12 d) 16 13 / 2513) The e/m of which pair will be same a) H2+, He+ b) N2+, CO+ c) NH3+, O2+ d) O2+, SO2+ 14 / 2514) Number of subshells and orbitals in N-shell are _____and ______ respectively. a) 4,4 b) 4,8 c) 4,12 d) 4,16 15 / 2515) Atoms of two different elements having same nucleon number but different proton number are called a) Isotopes b) Isotones c) Isobars d) Isoelectronic 16 / 2516) The deflection of positive rays in the magnetic field will be a) Toward the north pole b) Towards the south pole c) Towards cathode d) Perpendicular to magnetic field 17 / 2517) Minimum number of electron in N-shell are a) 22 Ti b) 23 V c) 24 Cr d) 25 Mn 18 / 2518) A di-valent cation having 10 electrons and 24 nucleon number. The number of neutrons are a) 11 b) 12 c) 10 d) 24 19 / 2519) Mass of one mole of proton is approximately equal to a) 1.0073 amu b) 1.008 g c) 1.0087 amu d) 1.6726 10-24 g 20 / 2520) Number of subshells in a shell are determined by using a) n b) 2n2 c) n2 d) n2/2 21 / 2521) When 6d orbital is complete, the entering electron goes into a) 7f b) 7s c) 7p d) 7d 22 / 2522) The number of waves per unit length is called a) Frequency b) Wave length c) Wave crust d) wave number 23 / 2523) Charge on 1 mole of proton is a) 96500C b) +1.6022 × 10-19C c) 1.7588 × 1011C d) 9.1095 x 1016C 24 / 2524) Which of following violates Hund's rule a) 1s², 2s², 2px¹, 2py¹, 2pz0 b) 1s², 2s², 2px², 2py0, 2pz0 c) 1s², 2s², 2px², 2py², 2pz² d) 1s², 2s¹ 25 / 2525) The ratio between energy and frequency of photon is a) Wave number of photon b) Wave length of photon c) Speed of photon d) Plank's constant Write your Name and see your result. My WhatsApp no is +923099164667 for your query. Your score isThe average score is 60%Share to your social media, or take a screenshot Facebook 0% Restart quiz Exit See review Send feedback Pages: 1 2 3 4 5 6 7 8 9 10 11 This Post Has 6 Comments Umair Ali khan July 26, 2022 Reply Dear students write your questions here. Hifsa Pervez October 1, 2022 Reply Shapes of orbitals were explained by magnetic or azimuthal quantum number? Answer below the question is given magnetic quantum number but in the explanation video of this question answer is given azimuthal quantum number. Umair Ali khan October 5, 2022 Reply Azimuthal. The discussion has correct answers. Please mention the question number, therefore, it is corrected. Haseeb UR Rehman July 26, 2022 Reply In ethanol and methanol, which has greater hydrogen bonding? Umair Ali khan July 28, 2022 Reply Methanol Hifsa Pervez October 7, 2022 Reply MCQ no.26Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment. Sign me up for the newsletter! Δ
Hifsa Pervez October 1, 2022 Reply Shapes of orbitals were explained by magnetic or azimuthal quantum number? Answer below the question is given magnetic quantum number but in the explanation video of this question answer is given azimuthal quantum number.
Umair Ali khan October 5, 2022 Reply Azimuthal. The discussion has correct answers. Please mention the question number, therefore, it is corrected.
Dear students write your questions here.
Shapes of orbitals were explained by magnetic or azimuthal quantum number? Answer below the question is given magnetic quantum number but in the explanation video of this question answer is given azimuthal quantum number.
Azimuthal. The discussion has correct answers. Please mention the question number, therefore, it is corrected.
In ethanol and methanol, which has greater hydrogen bonding?
Methanol
MCQ no.26