Question

1. In a Periscope the two mirrors are placed at an angle of ______ with the sides of the box and are parallel to each other. *

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a. 45°

 

b. 30°

c. 120°

d. 180°

 

2.. Which is the positive terminal of a Dry cell ? *

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a. Lead oxide

b.Graphite rod

 

c.Mangnese dioxide

d.None of these

 

3. Who am I? I am ATP producing factory. *

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a. Plastid

b. Mitochondria

 

c.Lysosomes

d. Endoplasmic Reticulum

 

4. Name an alloy formed from copper and tin *

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a. Steel

b.Bronze

 

c.Brass

d.None of these.

 

5.Complete the co- relation. Proton : Positive : : _________ : Neutral. *

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a.Nucleus

b.Neutron

 

c.Electron

d.Orbit

 

6 .Observe the diagram and identify it. *

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a.Dry cell

b.Electromagnet

 

c.Door bell circuit

d.None of these.

 

7. Complete the co–relation. Wall decoration : Kaleidoscope : : Sub-Marine : _____________. *

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a.Microscope

b.Telescope

c.Periscope

 

d. None of these.

 

8. During starvation ,__________digests stored proteins and fats. *

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a.Lysosomes

 

b.Mitochondria

c.Golgi bodies

d.None of these.

 

9. Which non-metal is in liquid state at room temperature? *

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a.Bromine

 

b.Hydrogen

c.Oxygen

d.Graphite

 

10.According to the second law of 'Reflection of light' -The incident ray, reflected ray and the normal lie in the ______________________ *

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a. different plane.

b. same plane.

 

c. outside plane.

d. None of the above.

 

11.To obtain more potential difference, cells are connected in ________________. *

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a.Parallel

b.Alternate

c.Series

 

d.None of these.

 

12.Choose the correct pair from the options given below: *

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a.Green leaves- Chlorophyll

 

b.Carrot-Lycopene

c.Purple pigments-Xanthophyll

d.Red Tomato- Carotene

 

13.Find the odd one out : Sonority, Ductility, Brittleness, Lustre. *

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a.Sonority

b.Ductility

c.Brittleness

 

d .Lustre

 

14. State which of the following statement is true with respect to characteristics of an 'Atom'. *

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a.Atom is electrically negative .

b.Atom is electrically positive .

c.Atom is electrically neutral .

 

d.None of these.

 

15.The symbol 'A' is used to denote the_________ *

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a.Atomic mass number

 

b. Atomic number

c. Valency

d. None of these.

 

16.If the reflected ray makes an angle of 60° with the normal, what angle must the incident ray make with the normal? *

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a. 45°

b. 30°

c. 60°

 

d. 90°

 

17._____________ is a scalar quantity. *

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a.Electric current.

 

b.Acceleration

c.Velocity

d. Force

 

18.The isotopes have same proton number but different ___________number. *

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a. Shell

b.Neutron

 

c.Electron

d.None of these.

 

19__________________is involved in the transmission of hereditary characters from parents to off springs . *

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a. Nucleus

 

b.Endoplasmic reticulum

c.Plastids

d.Mitochondria.

 

20.The radioactive isotope_____is used for determining the age of archeological objects *

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a.Iodine-131

b.Uranium-235

c.Carbon-14

 

d.Cobalt-60​

Answer 1

Answer:

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Explanation:

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