Important Guess of Chemistry Class 9

Very Important Guess of Chemistry Class 9 written by Honorable Sir Mr. Abbas Mirza Suib. These notes are very helpful in the preparation of the Important Guess of Chemistry Class 9 of Chemistry Urdu Medium for the students of the Matriculation and these are according to the paper patterns of all Punjab boards.

Summary and Contents:
Topics which are discussed in the notes are given below:
  • Here are the detailed  Important Guess of Chemistry Class 9 to help you prepare for your exams.
  • Very important Short Questions of each Chapter of the Chemistry Urdu Medium Class 9th for all Punjab Textbook Boards.
  • Industrial chemistry deals with the manufacturing of compounds: (a) In the laboratory (b) On micro scale (c) On commercial  (d) On economic scale
  • Which one of the following compounds can be separated by physical means? (A) Radicals(B) Compounds (C) Elements  (D) Mixtures
  • How compounds are formed in industrial chemistry? (A) On economic scale (B) On commercial (C) On small scale  (D) In laboratory
  • The most abundant element occurring in the oceans is: (A) Oxygen (B) Hydrogen (C) Nitrogen (D) Silicon
  • Which one of the following elements is found in most abundance in the earth’s crust? (A) Oxygen (B) Aluminum (C) Silicon (D) Argon
  • The third abundant gas found in the earth’s atmosphere is: (A) Carbon monoxide (B) Oxygen (C) Nitrogen (D) Argon
  • The number of naturally occurring elements is: (A) 92 (B) 86 (C) 80 (D) 75
  • The quantity of nitrogen by weight on Earth’s crust is: (A) 0.79 (B) 0.78 (C) 0.76 (D) 75
  • The percentage quantity of oxygen in human body is: (A) 64 (B) 65 (C) 66 (D) 67
  • The element occurring in the form of liquid is: (A) Iodine (B) Chlorine (C) Fluorine (D) Bromine
  • Elements are mostly found as: (A) Metalloids (B) Solid (C) Liquid (D) Gas
  • The lightest element is: (A) Calcium (B) Sodium (C) Liquid (D) Lithium
  • The valency of boron is: (A) 3 (B) 4 (C) 2 (D) 1
  • The example of homogeneous mixture is: (A) Radicals Compounds (B) Elements (C) Ice (D) cream
  • Formula of washing soda is: (A) NaOH (B) Na2CO3 (C) 10H2O (D) Na2CO3
  • Empirical formula of benzene is: (A) C6H6 (B) C2H2 (C) CH (D) CH2O
  • The valency of iron in ferric sulphate Fe2(SO4)3  is: (A) 4 (B) 3 (C) 2 (D) 1
  • The percentage of nitrogen in air is: (A) 20% (B) 0.21 (C) 0.78 (D) 0.7
  • Atomic mass number of an element is represented as: (A) K (B) N (C) A (D) Z
  • Atomic number of oxygens is: (A) 10 (B) 8 (C) 9 (D) 6
  • At room temperature, ……… is found in liquid form: (A) Mercury (B) Zinc (C) Copper (D) Sodium
  • Atomic number of sodium is: (A) 13 (B) 12 (C) 10 (D) 11
  • Isotope C-12 is found in quantity: (A) 0.989 (B) 0.997 (C) 0.976 (D) 0.969
  • Mass number of hydrogen is: (A) -1 (B) 1 (C) 2 (D) 0
  • Element found in gaseous state is: (A) Sodium  (B) Oxygen (C) Gold (D) Mercury
  • Which one of the following can be separated by physical means? (A) Mixture (B) Element (C) Compound (D) Radical
  • Molecular formula of glucose is: (A) C2H4O2 (B) CH2O (C) CHO (D) C6H12O6
  • Molecular mass of benzene is: (A) C6H6 (B) C6H12O6 (C) CH2O (D) H2O2
  • Empirical formula of hydrogen per oxide is: (A) SiO (B) CH20 (C) OH (D) CH
  • Which one of the following molecules is not tri-atomic? (A) CO2 (B) H20 (C) O (D) H2
  • ……… is formed with the removal of an electron from an atom: (A) Molecular anion (B) Molecular cation (C) Anion (D) Cation
  • All are tri atomic molecules except: (A) CO2 (B) H2O (C) O3 (D) H2
  • Molar mass usually expressed in grams. Which one of the following is molar mass of O2 in amu?
  • Sea water is a source of how many naturally occurring elements? (A) 92 (B) 71 (C) 63 (D) 43

Loading your document...

Download PDF