1. N2 + O2 .. 2NO - Q. This is a ...... reaction.
A) Reduction B) Displacement
C) Endothermic D) Exothermic Sunlight
2. 2 AgCl .... 2 Ag + Cl2.
This is a ........ reaction.
A) Exothermic B) Displacement
C) Photo Chemical D) Double displacement
3. Rancidity can be prevented by adding....
A) Antioxidants B) Oxides
C) Vitamins D) Potato chips
4. Bleaching of coloured objects is done with...
A) Bleaching powder B) moist Chlorine
C) Washing soda D) All the above
5. The method of protecting iron from rusting by coating them a thin layer of Zinc is called.....
A) Alloying B) Galvanizing C) Colouring D) Painting
6. Oxidation means addition of .....
A) Hydrogen B) Oxygen
C) Heat D) an anti oxidant
7. C + O2 .. CO2 + Q. This reaction is called....
A) a chemical reaction
B) Exothermic reaction
C) Photo chemical reaction
D) Endothermic reaction
8. Corrosion can be prevented by....
A) greasing B) painting
C) galvanizing D) All the above
9. Rusting of iron is an example for ....
A) Oxidation B) Reduction
C) Rancidation D) Electrolysis
10. The chemical formula for marble is....
A) CaO B) CaCOHs2
C) CaCO3 D) CaCl2
11. This gas is used as cooking fuel ......
A) Coal B) Propane C) CO2 D) Hydrogen
12. 2.0 gm. of Hydrogen at S.T.P. occupies a volume of ........
A) 2 litres B) 2.24 litres
C) 22.4 litres D) 224 litres
13. When lime stone is heated this gas is released .....
A) Hydrogen B) Oxygen
C) Nitrogen D) Carbon Dioxide
1. The colour of Silver bromide is.....
A) Yellow B) Red C) Light Yellow D) Blue
15. Na2SO4(aq) + BaCl2 (aq) .. BaSO4 (s) + 2 NaCl (aq)
This is an example for ........ reaction.
A) combination B) double displacement
C) displacement D) decomposition heat
16. CuO (s) + H2 (g) .. Cu (s) + H2O (g) is an example for ........ reaction.
A) Oxidation B) Reduction C) Decomposition D) Redox
17. Potatoes contain this enzyme ....
A) Tyrosinase B) Saliva C) Zymogen D) Lactase
18. This is a skeleton equation
A) AgNO3 + NaCl .. AgCl + NaNO3
B) Zn + 2 HCl .. ZnCl2 + H2
C) C3H8 + O2 .. CO2 + H2O
D) C + O2 .. CO2
19. The mirror which is bent inwards is known as .......... mirror.
A) Concave B) Convex C) Plane D) Magic
20. ...... burned ships using mirrors.
A) Fermat B) Archimedes C) Lewis D) Newton
21. Magnification m = ........
A) u.v B) v. u C) .hi ho D) h.o hi
22. Image and object will be of the same size, if the object is placed at ........ of a concave mirror.
A) focus (F) B) between F and C
C) Beyond C D) At C
23. This mirror is used as a rear view mirror in vehicles.
A) Convex mirror B) Concave mirror
C) Plane mirror D) Parabolic mirror
24. ENT specialists use this mirror.....
A) Convex mirror B) Plane mirror
C) Concave mirror D) Parabolic mirror
25. This image cannot be caught on a screen....
A) real image B) inverted image
C) enlarged image D) virtual image
26. This is used as a shaving mirror....
A) Concave mirror B) Convex mirror
C) Plane mirror D) Parabolic mirror
27. The mid point of a spherical mirror is called ............ of the mirror.
A) Focus B) Pole
C) Centre of curvature D) Principal axis
28. The image in this mirror suffers lateral inversion....
A) Concave mirror B) Convex mirror
C) Plane mirror D) Parabolic mirror
Answers:
1-C; 2-C; 3-A; 4-B; 5-B; 6-B; 7-B; 8-D; 9-A; 10-C; ; 11-B; 12-C; 13-D; 14-C; 15-B; 16-D; 17-A; 18-C; 19-A; 20-B; 21-C; 22-D; 23-A; 24-C; 25-D; 26-A; 27-B; 28-C.
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