Chemistry Question Answer

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Chemistry model question paper


 

21. Positron has nearly the same weight as that of –

(A) Alpha-Paralite

(B)  Neutron

(C) Proton

(D) Electron

Ans:- (D) Electron

 

22. Nucleons are –

(A) Protons and electrons

(B) Electrons and Neutrons

(C)  Protons and Neutrons

(D) Electrons, Protons and Neutrons

Ans:- (C)  Protons and Neutrons

 

23. A nuclear reaction must be balanced in terms of –

(A)  Energy

(B)  Mass

(C)  Mass and Energy

(D)  None of these

Ans:- (C)  Mass and Energy

 

24. The molecular weight of cellulose varies between –

(A)  1000 to 20000

(B)  100 to 200

(C)  20000 to 500000

(D) 100000 to 2000000

Ans:- (C)  20000 to 500000

 

25. Parlon is –

(A)  Rubber

(B)  Terelene

(C) Nylon – 6

(D) Oxlon

Ans:- (C) Nylon – 6

 

Chemistry quiz questions

 

26. Polymer used in bullet proof glass is –

(A)  Lexane

(B)  Nomax

(C)  PMMA

(D) Kevlar

Ans:- (C)  PMMA

 

27. The main active constituent of tea and coffee is –

(A)  Nicotine

(B)  Chlorophyll

(C)  Caffeine

(D) Aspirin

Ans:- (C)  Caffeine

 

28. The hardest form of carbon is –

(A) Coke

(B) Graphite

(C) Diamond

(D) Charcoal

Ans:- (C) Diamond

 

29. The concept of elliptical orbital was suggested by –

(A) Thomson

(B) Neil Bohr

(C) Rutherford

(D) Sommerfeld

Ans:- (D) Sommerfeld

 

30. Water drops are spherical because of –

(A) Polarity

(B) Viscosity

(C) Surface Tension

(D) Density

Ans:- (C) Surface Tension

 


 

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