Chemistry MCQ's Test 3

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Here is another test for entry test preparation for NUST, PIEAS, UHS, LUMS, GIKI, FAST, AIR, UET, Medical Colleges and Engineering Universities. These are also very helpful for annual exams.

1. All the periodic properties have same periodicity except

A) Ionization energy
B) Electron affinity
C) Electronegativity
D) Atomic radius

2. Which one of the following has incomplete octet

A) NF3
B) BH3
C) O2
D) N2

3. Which of following is correct order of decreasing energy units

A) Erg>cal>j
B) Erg>J>cal
C) Cal>J>erg
D) J>cal>erg

4. The substance which can act as oxidizing as well as reducing agent is/are:

A) H2O2
B) O3
C) NH2---NH2
D) HNO3

5. Which of the following is incorrect about fermentation

A) Exothermic process
B) Optimum temperatures 25-35 C
C) Proper aeration
D) Concentration of the above

6. Cannizzaros reaction is given by

A) C6H5CHO
B) C6H5COCH3
C) C6H5COOH
D) NONE

7. During hydrogenation of oils which of the following catalyst is use

A) Pd
B) Fe
C) Ni
D) V2O5

8. Which of following period contains element of all blocks

A) 2
B) 4
C) 5
D) 6

9. Isotopes are sister atoms of same which are similar with respect to the followings except:

A) Atomic number
B) m/e value
C) chemical properties
D) position in periodic table

10. Loss of a particle is equibalent to

A) Increase in number of protons by one
B) Decrease in number of neutrons by one
C) Change in atomic mass by one unit
D) none