Chemistry SECTION- H

      1.   the most electronegative element among the following is

(a)    Fluorine

(b)   Oxygen

(c)    Sodium

(d)   Sulphur

      2.  Match the following:

List  I (item)	List II (Toxic substance)
A.      CFL lamp           B.      Automobile battery          C.      Polymer          D.      Diesel engine	1.       Nitrogen oxides        2.       Phthalates        3.       Lead        4.       Mercury

Codes

                             A    B    C    D

(a)    4     2     3     1 

(b)   4     3     2     1

(c)    1     2     3     4

(d)   1     3     2     4

           3.  Consider the following statements about the commonly used automobile battery

1.       It is usually a lead-acid battery.

2.       It has six cells with a potential of 2 V each.

3.       Its cells work as galvanic class while discharging power.

4.       Its cells work as electrolytic cells while recharging.

Which of the statements given above are correct?

(a)    1 , 2 ,3  and 4

(b)   1, 2 and 3

(c)    2  and 4

(d)   3  and 4

         4. Which one of the following polymeric materials is used for making bullet proof jacket?

(a)    Nylon-6, 6

(b)   Rayon

(c)    Kevlar

(d)   Dacron

         5. Consider the following chemicals

1.       Benzene

2.       Carbon tetrachloride

3.       Sodium carbonate

4.       Trichloroethylene

Which of the above is / are used as dry

(a)    Only 1

(b)   Only 2

(c)    1,2 and 4

(d)   All of these

       6. Consider the following statements

1.       Baking soda is used in fire extinguishers

2.       Quicklime is used in the manufacture of glass.

Which of the statements given above is / are correct?

(a)    Only 1

(b)   Only 2

(c)    Both 1 and 2

(d)   Neither 1 nor 2

       7. Which one of the following is used in preparing match sticks?

(a)    Chile salt petre

(b)   Indian salt petre

(c)    Red phosphorus

(d)   Sodium bicarbonate

        8. Iodized salt is a

                      (a)    Mixture of potassium iodide and common salt 
                      (b)   Mixture of molecular iodine and common slat 
                      (c)    Compound formed by combination of potassium iodide and common salt 
                      (d)   Compound formed by combination of molecular iodine and common salt

         9. Which one among the following is a chemical process?

                      (A)   Distillation of see (salty) water 
                      (B)   Crystallization of impure salt (NaCI) 
                      (C)   Production of iodine (I ₂) from sea-weeds 
                      (D)   Sublimation of iodine (I ₂)

          10. Which one of the following heavy water is used in nuclear reactor?

                       (a)    Water having molecular weight 18 amu 
                       (b)   Water having molecular weight 20 amu 
                       (c)    Water at 4˚C but having molecular weight 19 amu 
                      (d)   Water below the ice in a frozen sea

Answer:

1.       A

2.       B

3.       A

4.       C

5.       C

6.       C

7.       C

8.       A

9.       C

10.   B