50 multiple choice questions for ICSE students

1.Diamond is an allotropic form of-

(a) silicon (b) carbon

(c) sulphur (d) germinium

2.Tetraethyl lead is used as-

(a) mosquito repellent (b) pain killer

(c) fire extinguisher (d) petrol additive

3. Chemical formula for water glass is-

(a) Na2Si03 (b) A1203

(c) NaA102 (d) CaSi03

4.Marsh gas 3s-

(a) hydrogen (b) nitrogen

(c) methane (d) ethane

5. Which of the following is used as moderator in nuclear reactor ?

(a) Ordinary water (b) Radium

(c) Thorium (d) Graphite

6.Which of the following is the most penetrating ?

(a) a-rays (b) 0-rays

(c) y-rays (d) X-rays

7. Which nutrients are most likely to be affected by food processing and storage ?

(a) Carbohydrates (b) Fats

(c) Proteins (d) Vitamins

8.Isotopes are separated by-

(a) filteration(b) sublimation

(c) distillation (d) crystallisation

9.Optic fibres are mainly used for which of the following ?

(a) communication (b) weaving

(c) musical instruments (d) food industry

10.In vulcanisation natural rubber Is heated with-

(a) Carbon (b) Sulpher

(c) Silicon (d) Phosphorous

11. Soap is a mixture of Sodium or Potassium salts of-

(a) monocarboxylic acids (b) glycerols

(c) dicarboxylic acids (d) tricarboxylic acids

12.Which of the following is a physical change ?

(a) Oxidation (b) Reduction

(c) Sublimation (d) Decomposition

13.The rate of chemical reaction does not depend upon-

(a) Concentration (b) Catalyst

(c) Temperature (d) Pressure

14. Rayon is chemically-

(a) glucose (b) amylase

(c) cellulose (d) pectin

15. Which one of the following is the petroleum wax ?

(b) Carnauba wax (d) Jojoba wax

(C) Decibel (D) Hertz

16. What is the unit for measuring the pitch or frequency of sound ?

(a) Coulomb (b) Cycle

(c) Decibel (d) Hertz

17. One fathom is equal to-

(a) 6 metres (b) 6 feet

(c) 60 feet (d) 100 cms.

18. Which of the following best explains the phenomenon “Simple Harmonic Motion” ?

(a) Cylinder (b) Disc

(c) Pendulum (d) None of these

19. The mixed oxide fuel is used for which of the following ?

(a) Nuclear Reactors (b) Aeroplanes .

(c) Cryogenic Engines (d) PSLV Rockets

20.The anode in a dry cell consists of-

(a) Graphite (b) Zinc

(c) Copper (d) Cadmium

21. Floppy disc in a computer is-

(a) compiler (b) core memory

(c) software (d) device for storing and retrieving data

22.In an electronic watch, the component corresponding to the pendulum of a pendulum clock is-

(a) Transistor (b) Balance wheel

(c) Crystal oscillator (d) Diode

23. The most efficient engine is-

(a) Petrol (b) Diesel

(c) Electric (d) Steam

24. The coversion of electric energy into chemical energy is observed in-

(a) fan (b) storage battery

(c) heater (d) incandescent light

25. Which of the following works on Bernoulli’s principle ?

(a) Gas lighter (b) Gas stove

(c) Bunsen burner (d) None of these

26.Hardware is related to-

(a) calculator (b) computer

(c) acid (d) heavy metal

27.AC cannot be used in-

(a) Amplifier (b) Transformer

(c) Voltmeter (d) Galvanometer

28.One micron is equal to-

29.A chronometers measures-

(a) sound waves (b)

(c) water-waves (d)

30. Very small time intervals are accurately measured by the-

(a) Pulsars (b) Quartz clocks

(c) Atomic clocks (d) White dwarfs

31.Which of the following is essential for blood clotting

(a) RBC (b) WBC

(c) Blood Platelets (d) Lymph

32.The tooth with three roots is-

(a) Molar (b) Pre-molar

(c) Incisor (d) Canine

33. Which of the following is a membrane that protects the developing embrio from desiccation?

(a) Amnion (b) Allantois

(c) Chorion (d) yolk

34. Reflex action is a function of-

(a) Cerebellum (b) Spinal cord

(c) Medulla (d) Autonomous nervous system

35. Which of the following is not a gland ?

(a) Stomach (b) Liver

(c) Kidney (d) Pancreas

36.Which of the following combinations of chromosomes is present in males ?

(a) XX (b) XXX

(c) XY(d) XYX

37. How much blood does an average adult have in the body.

(a) 3-4 litres (b) 4-5 litres

(c) 5-6 litres (d) 6-7 litre

40. The weight of an average human male brain is about-

(a) 1 kg (b) 1200 gms

(c) 1350 gms (d) 1500 gms

41. Element that is not found in blood is-

(a) iron (b) copper

(c) chromium (d) magnesium

42. Which of the following is not a bone in the legs of human body ?

(a) Radius (b) Tibia

(c) Femur (d) Fibula

43. The hormone responsible for the secretion of milk in mothers is-

(a) ACTH (b) Leutinizing

(c) Adrenalin (d) Lactogenic harmone

44. Food is mainly digested in- (a) liver (b) large intestine

(c) small intestine (d) mouth

45. The number of ribs in human body is-

(a) 12 (b) 18

(c) 20 (d) 24

46. Oxygen is transported to every cell of the human body by-

(a) red blood cells (b) blood platelets

(c) white blood cells (d) hormones

47. What is funny bone ?

(a) A muscle (b) A nerve

(c) A bone (d) A blood vessel

48. Haemoglobin is dissolved in the plasma of-

(a) man (b) fish

(c) frog (d) earthworm

49. Hormones are generally absent in-

(a) rat (b) monkey

(c) bacteria (d) cat

50. The stable plant dye is- body ?

(a) anthocyanin (b) phenol

(c) indigo (d) flavanole

ANSWERS

I.(b)2.(d)3.(a)4.(c)5.(d)6.(c)7.(b)8.(c)9.(a)10.(b)

11.(d)12.(c)13.(d)14.(c)15.(c)16.(c)17.(b)18.(c)

19.(c)20.(a)21.(d)22.(c)23.(c)24.(b)25.(c)26.(b)

27.(d)28.(c)29.(b)30.(c)31.(c)32.(a)33.(a)34.(d)

35.(c)36.(c)37.(d)38.(c)39.(c)40.(c)41.(c)42.(a)

43.(d)44.(c)45.(d)46.(a)47.(b)48.(d)49. (c)50.(c)