General Science 8th MCQs Test - YLB Online Educational Forum

1. The action carried out automatically is called

A.None of them

B.Indirect action

C.Direct Action

D.Reflection action

2. What prevents ultraviolent radiation of sun from reaching the surface of earth

A.None of them

B.Ozone

C.Crust

D.Sky

3. The body actions that are performed prior thought are?

A.Involuntary actions

B.Voluntary actions

C.None of them

D.Reflex action

4. Acid turns litmus paper

A.None of them

B.Red

C.Blue

D.Both of them

5. The unit of inheritable charactrics is

A.None of them

B.Brain

C.DNA

D.Genes

6. Balance is an instrument used for measurement of

A.Time

B.Force

C.Mass

D.None of them

7. The process in which the cell is divided in two parts is called

A.None of them

B.Reproduction

C.Cell division

D.Cell wall

8. Corban dioxide helps in burning of things

A.True

B.None of them

C.False

D.both of them

9. Acid turns methyl orange solution

A.None of them

B.Blue

C.Both of them

D.Red

10. One atom of caseium_133 Completes 9,192,631, 770 vibrations in;

A.One hour

B.None of them

C.One day

D.One second

11. The chemical reaction in which heat is released is called

A.None of them

B.Chemical reaction

C.Exothermic reaction

D.Heat reaction

12. The meniscus of mercury is

A.None of them

B.Both of them

C.Convex

D.Concave

13. In any chemical reaction ;

A.Matter can be destroyed

B.None of them

C.Matter can neither be created nor be destroyed

D.Matter can created

14. What is the functional unit of kidney

A.Unrainy Bladder

B.None of them

C.Ureter

D.Nephron

15. The perpendicular force acting on unit surface area of an object is called...............?

A.Volume

B.Density

C.None of them

D.Pressure

16. The central nervous system consists of

A.both of them

B.Motor Neurons

C.None of them

D.Sensory neurons

17. Chromosomes are consist of DNA and

A.None of them

B.Protein

C.Brain

D.Genes

18. The conversion of compound in ion is called

A.Ionization

B.Realization

C.None of them

D.both of them

19. Which of the following is sensory organ

A.None of them

B.Eye

C.Heart

D.Liver

20. The number of chromosomes in human sex cell is

A.23

B.32

C.None of them

D.43

21. ............... React chemically with fat or oil to form soap

A.Alkalis

B.None of them

C.Sulpher

D.Acids

22. The pH of a strong acid is equal to.............

A.None of them

B.1

C.5

D.7

23. The shape of chromosomes is like

A.Only Y

B.None of them

C.Only X

D.X or Y

24. Zygote is formed by fusion of............... gametes

A.Three

B.None of them

C.Six

D.Two

25. Burning is an example of

A.None of them

B.Chemical reaction

C.Heat reaction

D.Atomic reaction

26. What produces insulin to human body

A.Liver

B.Stomach

C.None of them

D.Pancreas

27. CO2 is obtained by heating

A.Calcium carbonate

B.Atom

C.Neutron

D.None of them

28. The international system of units was introduced in

A.1960

B.None of them

C.1898

D.1964

29. The human excretory system consists of

A.2 kidneys

B.Both of them

C.1 Kidney

D.None of them

30. The energy resources soon can exhaust due to their

A.Less Use

B.Zero Use

C.Unwise use

D.None of them

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