General Science 8th MCQs Test - YLB Online Educational Forum

1. Acid turns methyl orange solution

A.None of them

B.Both of them

C.Blue

D.Red

2. CO2 is obtained by heating

A.Atom

B.Neutron

C.Calcium carbonate

D.None of them

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

A.Acids

B.None of them

C.Alkalis

D.Sulpher

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

A.7

B.1

C.5

D.None of them

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

A.Involuntary actions

B.None of them

C.Reflex action

D.Voluntary actions

6. Burning is an example of

A.Atomic reaction

B.Heat reaction

C.Chemical reaction

D.None of them

7. The number of chromosomes in human sex cell is

A.43

B.32

C.None of them

D.23

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

A.Chemical reaction

B.Exothermic reaction

C.Heat reaction

D.None of them

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

A.Pressure

B.None of them

C.Volume

D.Density

10. Corban dioxide helps in burning of things

A.both of them

B.True

C.False

D.None of them

11. What produces insulin to human body

A.None of them

B.Liver

C.Pancreas

D.Stomach

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

A.One hour

B.One day

C.None of them

D.One second

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

A.Six

B.Three

C.None of them

D.Two

14. What is the functional unit of kidney

A.None of them

B.Nephron

C.Ureter

D.Unrainy Bladder

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

A.Sky

B.Ozone

C.Crust

D.None of them

16. Acid turns litmus paper

A.None of them

B.Red

C.Blue

D.Both of them

17. Chromosomes are consist of DNA and

A.Protein

B.None of them

C.Genes

D.Brain

18. In any chemical reaction ;

A.None of them

B.Matter can created

C.Matter can be destroyed

D.Matter can neither be created nor be destroyed

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

A.Cell wall

B.None of them

C.Cell division

D.Reproduction

20. The meniscus of mercury is

A.Convex

B.None of them

C.Both of them

D.Concave

21. The action carried out automatically is called

A.Direct Action

B.Indirect action

C.None of them

D.Reflection action

22. Balance is an instrument used for measurement of

A.Force

B.None of them

C.Mass

D.Time

23. The unit of inheritable charactrics is

A.DNA

B.Brain

C.None of them

D.Genes

24. The conversion of compound in ion is called

A.both of them

B.Realization

C.Ionization

D.None of them

25. The international system of units was introduced in

A.1898

B.1964

C.1960

D.None of them

26. The shape of chromosomes is like

A.None of them

B.Only X

C.X or Y

D.Only Y

27. The central nervous system consists of

A.Motor Neurons

B.None of them

C.both of them

D.Sensory neurons

28. Which of the following is sensory organ

A.Eye

B.Heart

C.None of them

D.Liver

29. The human excretory system consists of

A.Both of them

B.1 Kidney

C.None of them

D.2 kidneys

30. The energy resources soon can exhaust due to their

A.Unwise use

B.None of them

C.Zero Use

D.Less Use

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