Chemistry

Topics: Electrochemistry, Hydrogen, Vitamin C Pages: 3 (832 words) Published: January 21, 2014
JEET SCIENCE ACADEMY CHOWK AZAM (LAYYAH)
TIME 2.5 Hr CHEMISTRY 1st YEAR CH # 1,2,9,10 Marks: 85 G.Super . 1 Name…………………………………………...... Objective ROLL NO. ………………………………. Q.NO.1. Encircle the correct answer? (1×17=17)

1. Atoms of which one of the follelement have independent existance: (A) Flourine (B) Krypton (C ) Oxygen (D) Nitrogen 2.18g glucose is dissolved in 90g of water. The relative lowering of vapour pressure is equal to: (A) 1/5 (B) 5.1 (C) 1/51 (D) 6.0 3.The volume occupied by 32g of O2 at S.T.P in dm-3 is : (A) 22.414 (B) 2.2414 (C) 224.414 (D) 0.224 4.The mass of glucose required to prepare 1 dm 3 of 20% glucose solution is : (A) 18g (B) 180g (C) 36g (D) 200g 5.27g of Al will react completely with how much mass of O2 to prouce AL2O3: (A) 8g of oxygen (B) 16g of oxyge (C) 32g of oxygen (D) 24g of oxygen 6. The best reducing agent is : (A) F (B) Cl (C) Br (D) I 7.Molarity of pure water is : (A) 1 (B) 18 (C) 55.5 (D) 60 8.The largest number of molecules present in : (A) 2.8g of CO (B) 3.6g of H2O (C) 4.6g of C2H5OH (D) 5.4g of N2O5 9.The volume occupied by 1.4g of N2 at S.T.P in dm3 is : (A) 1.12 (B) 2.24 (C) 11.2 (D) 22.4...
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