General Science 8th MCQs Test - YLB Online Educational Forum

1. In any chemical reaction ;

A.Matter can neither be created nor be destroyed

B.None of them

C.Matter can created

D.Matter can be destroyed

2. The number of chromosomes in human sex cell is

A.43

B.32

C.23

D.None of them

3. The action carried out automatically is called

A.Indirect action

B.Reflection action

C.Direct Action

D.None of them

4. What is the functional unit of kidney

A.Ureter

B.Unrainy Bladder

C.Nephron

D.None of them

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

A.None of them

B.Sulpher

C.Acids

D.Alkalis

6. CO2 is obtained by heating

A.Atom

B.Neutron

C.None of them

D.Calcium carbonate

7. Chromosomes are consist of DNA and

A.Genes

B.Protein

C.None of them

D.Brain

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

A.None of them

B.Volume

C.Pressure

D.Density

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

A.5

B.7

C.1

D.None of them

10. Corban dioxide helps in burning of things

A.None of them

B.both of them

C.True

D.False

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

A.Two

B.None of them

C.Three

D.Six

12. Balance is an instrument used for measurement of

A.Time

B.Mass

C.Force

D.None of them

13. The unit of inheritable charactrics is

A.Genes

B.Brain

C.None of them

D.DNA

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

A.None of them

B.One day

C.One hour

D.One second

15. The international system of units was introduced in

A.None of them

B.1960

C.1964

D.1898

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

A.Crust

B.Ozone

C.None of them

D.Sky

17. The shape of chromosomes is like

A.Only Y

B.None of them

C.X or Y

D.Only X

18. The meniscus of mercury is

A.None of them

B.Convex

C.Both of them

D.Concave

19. Acid turns litmus paper

A.Red

B.Both of them

C.None of them

D.Blue

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

A.Reflex action

B.Voluntary actions

C.None of them

D.Involuntary actions

21. The human excretory system consists of

A.Both of them

B.None of them

C.1 Kidney

D.2 kidneys

22. What produces insulin to human body

A.None of them

B.Pancreas

C.Stomach

D.Liver

23. Burning is an example of

A.Chemical reaction

B.Atomic reaction

C.Heat reaction

D.None of them

24. The energy resources soon can exhaust due to their

A.None of them

B.Less Use

C.Zero Use

D.Unwise use

25. The conversion of compound in ion is called

A.both of them

B.None of them

C.Ionization

D.Realization

26. The central nervous system consists of

A.Sensory neurons

B.both of them

C.Motor Neurons

D.None of them

27. Which of the following is sensory organ

A.Liver

B.None of them

C.Heart

D.Eye

28. Acid turns methyl orange solution

A.Red

B.None of them

C.Blue

D.Both of them

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

A.Cell division

B.None of them

C.Reproduction

D.Cell wall

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

A.Chemical reaction

B.None of them

C.Heat reaction

D.Exothermic reaction

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