1st Year Chemistry | Basic Concepts | Quiz Part-1

Dear Students!

• This quiz is from Chemistry FSc Part-I / 1st Year, Chapter No.1: Basic Concepts.
• We tried our best to make/choose maximum Multiple Choice Questions (MCQs) in this chapter.
• Improve yourself by attempting all quizzes of 11th Class (Chemistry). 
• This quiz is the Part-I of this chapter.

NOTE: 

The remaining MCQs of this chapter will be uploaded soon Insha Allah.

Attempt Short Questions and Answer (Chapter No.1: Basic Concepts) 

Chapter No.1: Basic Concepts | Quiz Part-I

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1. The mass of one mole of electron is:
   1.   1.008 mg
   2.   1.673 mg
   3.   0.184 mg
   4.   0.55 mg
2. Which one is the empirical formula of a compound?
   1.   $B_2{H}_6$
   2.   $A{l}_{2}C{l}_6$
   3.   $H{g}_{2}C{l}_2$
   4.   $HgC{l}_2$
3. Which of the following is approximately 3400 times lighter than haemoglobin molecule?
   1.   ${}_{12}Mg$
   2.   ${}_{20}Ne$
   3.   ${}_{4}He$
   4.   ${}_{40}Ca$
4. Gold has number of isotopes:
   1.   6
   2.   3
   3.   1
   4.   9
5. Number of moles of water present in 90 g of water are:
   1.   4
   2.   3
   3.   5
   4.   2
6. The mass of Aluminium in 51 g of $A{l}_2{O}_3$ is:
   1.   54 g
   2.   13 g
   3.   108 g
   4.   27 g
7. Number of atoms present in 1 mole of NaOH:
   1.   None of these
   2.   $2\times 6.02\times {10}^{23}$ atoms/mole
   3.   $3\times 6.02\times {10}^{23}$ atoms/mole
   4.   $6.02\times {10}^{23}$ atoms/mole
8. The radius of atoms are in the range:
   1.   2 $A^o$
   2.   4 $A^o$
   3.   1 $A^o$
   4.   3 $A^o$
9. Tin (element) has number of isotopes:
   1.   11
   2.   9
   3.   7
   4.   5
10. Isotopes differ in:
    1.   Properties which depend upon mass
    2.   The extent to which they may be affected in electromagnetic field
    3.   Arrangement of electrons in orbitals
    4.   Chemical properties
11. Silver has number of isotopes:
    1.   16
    2.   2
    3.   8
    4.   4
12. Which one is a molecular ion?
    1.   $N{H}_4^{+1}$
    2.   $F{e}^{+3}$
    3.   $F^{-1}$
    4.   $N_2^{+2}$
13. Mass spectrometer separates different positive isotopic ions on the basis of their:
    1.   charge value
    2.   m/e value
    3.   e/m value
    4.   mass value
14. In a mass spectrum, the height of peak explains:
    1.   number of electrons
    2.   number of isotopes
    3.   relative abundance of isotopes
    4.   atomic number
15. When we compare one mole each of $O_2$ and $H_2$, then we observe:
    1.   $N_2$ has greater no. of molecules than $O_2$
    2.   same no. of molecules
    3.   $O_2$ has greater no. of molecules than $N_2$
    4.   None of these