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Welcome to your NEET WEEKLY TEST CHEMISTRY (25.10.2025)
IMPORTANT INSTRUCTIONS
1. The test is of 90 minutes duration and Test Booklet contains 45 questions. Each question carried 4 marks for each correct response, the candidate will get 4 marks. For each incorrect response, one mark will be deducted from the total scores.2. Use of Cell phone/Electronics gadgets/Calculator etc. are not allowed.CHEMISTRY1. Hydrogen atoms are excited from ground state to the state of the principal quantum number 5. Then the number of spectral lines observed will be:
1) 62) 103) 15 4) 20
2. What is the ratio of the longest to shortest wavelengths in Brackett series of Hydrogen spectra?
1) 12/3 2) 25/93) 16/25 4) 4/3
3. Calculate the radius of Bohr’s fifth orbit (in nm) for Hydrogen atom.
1) 1322.5 2) 13.2253) 1.32254) 0.1322
4. What is the value of orbital angular momentum for an electron in 5s orbital?
1) 12) 03) 24) 4
5. Which of the following is the energy of a possible excited state of Hydrogen?
1) +3.4 eV2) -13.6 eV3) -3.4 eV4) +13.6 eV
6. How many spherical nodes are present in 5s orbital in a Hydrogen atom
1) 32) 43) 1 4) 0
7. Azimuthal quantum number for the last electron in Ca atom is:
1) 02) 13) 24) 3
8. Calculate the uncertainty in the position of an electron if the uncertainty in its velocity is 5.7 X 105 m/s.
1) 2 × 10 12 m2) 1 × 10-10m3) 3 × 10 3 m4) 1 × 10 -2 m
9. How many electrons in Magnesium have m = 0?
1) 122) 103) 8 4) 6
10. The speed of an electron having a wavelength of 10-5 m is
1) 7.27 × 106 m/s2) 0.761 ×104 m/s3) 0.725 × 102 m/s4) 7.6 3 × 104 m/s
11. The uncertainty in measuring velocity of a proton is 4 X 103 m/s. The minimum uncertainty involved in measuring the position of proton will be?1) 3.7 × 104 m2) 4.3 × 10-12 m3) 7.9 × 10 -12 m4) 3.7 × 108 m
12. What is the normality of a solution containing 49 g of H₂SO₄ in 100 m L of solution?
1) 1N 2) 0.01 N3) 10 N 4) 100 N
1) 30.25 g2) 37.74 g3) 50.32 g4) 52.50 g
1) 60 M2) 65 M3) 45 M 4) 50 M
1) 50 g2) 1g3) 10g 4) 5g
1) HF2) H2F23) H3F3 4) H4F4
1) 0.502) 0.353) 0.30 4) 0.20
1) Law of Conservation of Mass2) Law of Definite Proportions3) Law of Multiple Proportions4) Law of Reciprocal Proportions
1) 2.8 L 2) 5.6 L3) 1.4 L 4) 4.2 L
1) 0.6022 x 1023 2) 3.011 x 10233) 3.6 x 10234) 6.022 x 1023
1) 1.32 g 2) 1.47 g3) 1.25 g 4) 3.66 g
1) 2.24 x 104 2) 2.24 x 1033) 3.136 x 1044) 3.136 x 103
1) 0.075 2) 0.0173) 0.5 4) 0.025
1) Fe4[Fe (CN)6]3 2) Na3[Fe (CN)6]3) Fe (CN)3 4) Na4[Fe(CN)5NOS]
1) Cobalt salt2) Lead slat3) Zinc Salt 4) Silver Salt
1) 42) 33) 54) 7
1) H2S2) NO23) NH34) SO2
1) HCO3–2) NO3–3) S24) All of these
1) Chloride2) Carbonate3) Nitrate4) Both (1) and (3)
1) 0 2) 23) 3 4) 4
1) CH3CH2NH22) CH3CH3OH3) CH3CH2NHCH3 4) CH3CH2CN
1) Tartaric acid2) α-amino acids3) Maleic acid4) Lactic acid
1) NO2 donates electron meta position2) NO2 withdraws electron from ortho and para positions3) NO2 make ring electron rich at ortho and para.4) NO2 withdraws electron from meta position.
1) n-butane2) 1-butene3) cis-2-butene 4) trans-2-butene.
1) Cl–< Br– < I– 2) I–< Cl– < Br–3) Br– < Cl– < I^– 4) I–< Br– < Cl–
1) (I), (II)2) (II), (I)3) (I), (III)4) (III), (I)
1) C6 H5 CH2 Br2) C6 H5 CH(C6H5)Br3) C6 H5 CH(CH3)Br4) C6 H5 C(CH3)(C6 H5)Br
45. Which of the following has highest nucleophilicity?
1) SH–2) H₂O3) OH–4) F–