Time 2hrs UNIT TEST -1 MM 50 MARKS
SECTION -A (PHYSICS)
Note: 1.ALL THE QUESTIONS ARE COMPULSORY
2.EACH MULTIPLE CHOICE QUESTIONS ARE 1 MARKS
3.EACH LONG ANSWER TYPE QUESTIONS ARE 3 MARKS
MULTIPLE CHOICE QUESTIONS ( 8 × 1 =0 8 )
1. Focal length of plane mirror is
a. At infinity
b. Zero
c. Negative
d. None of these
2. Image formed by plane mirror is
a. Real and erect
b. Real and inverted
c. Virtual and erect
d. Virtual and inverted
3. A concave mirror gives real, inverted and same size image if the object is placed
a. At F
b. At infinity
c. At C
d. Beyond C
4. Power of the lens is -40, its focal length is
a. 4m
b. -40m
c. -0.25m
d. -25m
5. A concave mirror gives virtual, refract and enlarged image of the object but image of smaller size than the size of the object is
a. At infinity
b. Between F and C
c. Between P and F
d. At E
6. In optics an object which has higher refractive index is called
a. Optically rarer
b. Optically denser
c. Optical density
d. Refractive index
7. The optical phenomena, twinkling of stars, is due to
a. Atmospheric reflection
b. Total reflection
c. Atmospheric refraction
d. Total refraction
08. The unit of power of lens is
a. Metre
b. Centimeter
c. Diopter
d. M-1
LONG ANSWER TYPE QUESTIONS ( 3×3= 09 MARKS )
09. The radius of curvature of a spherical mirror is 20 cm. What is its focal length?.
OR
Name the mirror that can give an erect and enlarged image of an object.
10. Why do we prefer a convex mirror as a rear-view mirror in vehicles?
--- -OR
Find the focal length of a convex mirror whose radius of curvature is 32 cm.
11.A concave mirror produces three times magnified (enlarged) real image of an object placed at 10 cm in front of it. Where is the image located?
OR
A ray of light travelling in air enters obliquely into water. Does the light ray bends towards the normal or away from the normal? Why?
SECTION B ( CHEMISTRY)
MULTIPLE CHOICE QUESTIONS (8×1=08 MARKS)
12 Which Among The Following (Are) Double Displacement Reaction (S)?.
[A]. Pb + CuCl2 → PbCl2 + Cu, and CH4 + 2O2 → CO2 + 2H2O
[B]. Na2SO4 + BaCl2 → BaSO4 + 2NaCl
[C]. Pb + CuCl2 → PbCl2 + Cu, and Na2SO4 + BaCl2 → BaSO4 + 2NaCl
[D]. C + O2 → CO2, and CH4 + 2O2 → CO2 + 2H2O
13. Which Of The Following Is Not A Physical Change?
[A]. Boiling of water to give water vapour.
[B]. Melting of ice to give water.
[C]. Dissolution of salt in water.
[D]. Combustion of Liquefied Petroleum Gas (LPG).
14.Some fruits like mango, lemon, raw grapes, orange, etc., have a sour taste due to the presence of:
a. Acetic acid
b. Citric acid
c. Lactic acid
d. Oxalic acid
15. Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y.
a. X- Sulphuric acid and Y- Oxygen gas
b. X- Hydrochloric acid and Y- Oxygen gas
c. X- Sulphuric acid and Y- Hydrogen gas
d. X- Hydrochloric acid and Y- Hydrogen gas
16. Dilute acid does not produce carbon dioxide on being treated with:
a. Marble
b. Lime
c. Baking soda
d. Limestone
17. Which one of the following is an example of strong acid ?
a. Sulphuric Acid
b. Hydrochloride Acid
c. Sodium cloride
d. Both a and b
18. The difference of molecules of water in gypsum and PoP is
(a)5/2 (b) 2b (c) 3/2 (d) ½
19. The chemical formula of caustic potash is...
(a) NaOH (b) Ca(OH)2 (c) NH4OH (D) KOH
LONG ANSWER TYPE QUESTIONS (3 × 3 =09)
20. Why should curd and sour substances not be kept in brass and copper vessels?
OR
Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character?
21. Why does distilled water not conduct electricity, whereas rain water does?
22. How is exothermic reaction different from an endothermic reaction
OR
Write a balanced chemical equation for process of photosynthesis.
SECTION C BIOLOGY
MULTIPLE CHOICE QUESTIONS ( 1 × 7 = 07 MARKS )
Question 22. Which of the following are energy foods?
(a) Carbohydrates and fats
(b) Proteins and mineral salts
(c) Vitamins and minerals
(d) Water and roughage
Question 23. In which mode of nutrition an organism de-rives its food from the body of another living organism without killing it?
(a) Saprotrophic nutrition
(b) Parasitic nutrition
(c) Holozoic nutrition
(d) Autotrophic nutrition
Question 24. The mode of nutrition found in fungi is:
(a) Parasitic nutrition
(b) Holozoic nutrition
(c) Autotrophic nutrition
(d) Saprotrophic nutrition
Question 25. Roots of the plants absorb water from the soil through the process of:
(a) diffusion
(b) transpiration
(c) osmosis
(d) None of these
Question 26. The site of photosynthesis in the cells of a leaf is
(a) chloroplast
(b) mitochondria
(c) cytoplasm
(d) protoplasm
Question 27. In amoeba, food is digested in the:
(a) food vacuole
(b) mitochondria
(c) pseudopodia
(d) chloroplast
Question 28. Which region of the alimentary canal absorbs the digested food?
(a) Stomach
(b) Small intestine
(c) Large intestine
(d) Liver
LONG ANSWER TYPE QUESTIONS ( 3 × 3 = 09 MARKS )
Question 29. Describe the process and importance of double circulation in humans.
OR
How is respiration in plants and respiration in animals different?
Question 30. (i )Name the blood vessel that brings oxygenated blood to the human heart.
(ii) Which chamber of human heart receives oxygenated blood?
Question 31. Draw the labeled diagram of the human digestive system
OR
Define excretion. What are the two organs in human beings that act as accessory excretory organs?
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