Basic comcept and Experimental Techniques in Chemistry II

17:09:00 Unknown 0 Comments

Basic Concept and Experimental Techniques II
Here are MCQ's from chapter 1 basic concepts and chapter 2 Experimental techniques in chemistry Book 1


1. Which one of the following is the molecular formula of hydrocarbon which contains 80% by mass of carbon and 20% by mass of hydrogen?
    A) CH4
    B) C3H6
    C) C2H6
    D) C3H6


2. Actual yield is less than theoretical yield because of

    A) Inexperienced work
    B) Lake of proper techniques
    C) Some competing side reactions
    D) all


3. Which of the following statements is correct

    A) For smooth filtration stem of the funnel should remain continuously filled by liquid
    B) Selection of filter paper depends on the size of precipitate
    C) In order to avoid splashing stem of the funnel should touch side of the wall of a beaker
    D) all


4. Fluted filter paper is used instead of ordinary filter paper because it has

    A) Greater pore size
    B) Greater surface area
    C) Increases rate of filtration
    D) Both b and c


5. Which of the following is not sublime substance

    A) Iodine
    B) Ammonium chloride
    C) Benzoic acid
    D) Potash alum


6. Solvent extraction is particularly useful technique for separation when the product to be separated is

    A) non volatile or thermally unstable
    B) Volatile or thermally stable
    C) Non volatile or ther stable
    D) Volatile or thermally unstable


7. Which statement is not correct about the properties of good solvent

    A) It should easily be removable
    B) It should dissolve maximum solute at room temperature and minimum at its boiling point
    C) It should be inexpensive
    D) It should not reqact with solute


8. Safe and reliable method of drying crystal is through

    A) Vacuum desiccators
    B) Pressing between folds of filter paper
    C) Drying in oven
    D) Evaporation of solution


9. To achieve a good separation, the two liquids are gently shaken to increase

    A) Their area of contact
    B) Their miscibility
    C) their separation
    D) Their solubility into each other


10. Chromatography in which stationary phase is solid is called

    A) Partition chromatography
    B) Adsorption chromatography
    C) Paper chromatography
    D) HPLC

I am Mechatronics and Control Engineer from UET, Lahore. Helping Engineering students gives me pleasure.

You Might Also Like

0 comments:

Confused? Feel Free To Ask
Your feedback is always appreciated. We will try to reply to your queries as soon as time allows.

Subscribe to: Post Comments (Atom)