HSSC-I - Chemistry Entry Test No.1

 HSSC-I Entry  Test

Session 2014-2015

Subject: Chemistry

                    

Name:-___________________________________________

Total Marks: 25                                                                                             Time: 25 Minutes                                                              

Note: select the suitable answer from given choices?

1)      Which of the following is not a molecular ion,

i) CH₄⁺¹             ii) NH₄ ⁺¹              iii) O₂⁺¹                   iv) N₂⁺¹

2)      Isotopes of an element differ from each other with respect to,

i)    Chemical properties               ii) Number of electrons

iii) Number of protons                iv) none of these

3)   Which one of the following will have the highest 1st ionization potential,

 i) Be                ii) B                 iii) C               iv) N                 v) O

4)      The main products obtained by the fermentation of  Molasses is,

      i) Ethanol          ii) Carbon dioxide                     iii) Glucose               iv) Both i)  and ii)

5)      Hydrogen gas can be prepared from Methane gas using Nickel as catalyst as shown below,

           CH₄                                                                        1000^o C

                                                                               H₂   +  “Y”

“X”                                                                      

 

6)          What the “X” and “Y” can be,

    a) Oxygen and carbon dioxide                  b) Nitrogen and Ammonia     

                 c) Steam and carbon dioxide                     d) Steam and carbon monoxide.

7)      When carbon dioxide is passed through lime water it turns milky, the milkynes or cloudiness is due to formation of,                                                                                                                        

   a) Calcium Bicarbonate                  b) Calcium Phosphate 

   c) Calcium Sulphate                        d) Calcium Carbonate

8)         In which of the following reactions the Sulphuric acid is not behaving as an acid,

     a)   H₂SO₄ + 2NaOH                                 Na₂SO₄  +   2H₂O     

     b)  H₂SO₄  +  BaCl₂                                  BaSO₄    +   2HCl

    c)  H₂SO₄+  CuO                                      CuSO₄   +   H₂O

    d)  H₂SO₄  +  Mg                                       MgSO₄  +   H₂

9)        NH₄OH is an example of,

i)    Strong acid           ii) Weak acid              iii) Strong base            iv) Weak base

10)    The formula of Ethene gas is,

i)  C₂H₆                         ii)  C₂H₄                       iii) C₂H₂                        iv)  C₃H₈

11)  Which of the following gas will decolorize bromine water

i) C₂H₆          ii)  C₃H₆                  iii) C₄H₁₀                   iv)  C₃H₈

12)  Isotopes of an element have different,

i)  Number of Electrons                         ii) Number of Protons 

iii) Physical properties                         iv) Chemical properties

13)   Which of the following gases do not cause Global worming?

         a)  Methane     b) CFCS            c) Carbon dioxide                         d) Nitrogen di oxide

14)  Ozone layer in atmosphere protects the life on earth from dangerous…….. 

             a)  Infrared rays         b) X-rays         c) cosmic rays              d) ultraviolet rays

15)  The substance used as catalyst in Solvay’s process is,

i)   CaCO₃        ii)   NH₃               iii)   Brine              iv) Ca(OH)₂

16)  The charge on oxide ion is,

i)  +2                  ii) +3                            iii) -3                            iv) -2

17)  The charge on phosphate ion is,

ii)                  +2       ii) +3         iii) -3        iv) -2

18.  In RNA the ……………….. is present which is absent in DNA,

i)  Uracil           ii) double stand           iii) Thymine                 iv) phosphate group

20.  The functional group in ketones is,

i)  RCOOR                    ii) RCOR                     iii) ROH               iv) ROR

21)  The number of atoms in 6 grams diamond piece are equal to,

i)  6.022 x 10²³          ii) 3.011 x 10²³         iii) 2 x 6.022 x 10²³        iv) 3 x 6.022 x 10²³

22)  The colour of phenolphthalein in basic medium is,

i)  Pink                          ii) orange                      iii) yellow                     iv) no colour

23)  The number of moles in 20 grams of caustic soda are equal to,

i)  1mole            ii) 0.5 moles                 iii) 2 moles                   iv) 1.5 moles

24)  Cellulose is an example of.

i)  Polysaccharide          ii) disaccharide             iii) monosaccharide           iv) proteins

25)  The red colour of Blood is due a protein called Hemoglobin, the hemoglobin contains,

i)  Calcium                     ii) Magnesium                 iii) Iron                   iv) Manganese