Basic Concept and Experimental Techniques in Chemistry IV

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

1. 10 moles of h2 reacts with 4 moles of O2 then number of water produced is

A) 4 mole
B) 16 mole
C) 8 mole
D) 12 mole

2. The comparative rates at which the solutes move in paper chromatography, depend on

A) The size of paper
B) Rf values
C) Temperature of the experiment
D) Size of the chromatographic tank used

3. Which of the following elements has maximum number of isotopes

A) Ni
B) Ca
C) Pd
D) Sn

4. Which of the following type of chromatography is commonly used in the laboratory

A) Ascending
B) Radial
C) Descending
D) all

5. The agent which is not used in vacuum dessicator as drying agent is

A) CaCl2
B) Slica gel
C) P2O5
D) Dil. H2SO4

6. During the process of crystallization the hot saturated solution

A) Should be cooled very slowly to get large sized crystals
B) Should be cooled at moderate to get medium sized crytals
C) should be evaporated to get crystals
D) Should be mixed with immescible liquid to get the pure crystals of the product

7. Chromatography involves the distribution of solute between

A) Two stationary phases
B) Two mobile phases
C) A stationary phase and mobile phase
D) Two stationary and two mobile phase

8. The dried pattern obtain on the filter paper in the form of separated component of mixture is called

A) Histogram
B) Chromatogram
C) Oscillograph
D) Mass spectrum

9. The dried pattern obtain on the filter paper in the form of separated component of mixture is called

A) Histogram
B) Chromatogram
C) Oscillograph
D) Mass spectrum

10. Which of the following is the most convenient way of filtration by

A) This component mostly remains in stationary phase
B) This component is mostly remains in mobile phase
C) Component equally distributes itself between stationary and mobole phase
D) all