21. Glass is made of a mixture of
A. Quartz and mica
B. Sand and salt
C. Sand and silicates
D. None of these
22. Which one of the following is used as a filter in rubber tyres?
A. Graphite
B. Coal
C. Coke
D. Carbon black
23. Which one of the following polymeric materials is used for making bullet proof jackets?
A. NYLON 6.6
B. RAYON
C. KEVLAR
D. DACRON
24. Which alloy contains nickel?
A. Brass
B. Bronze
C. Invar
D. Solder
25. Which one of the following elements is not present in stainless steel?
A. Iron
B. Tungsten
C. Chromium
D. Nickel
26. Bronze is an alloy of
A. Tin and zinc
B. Iron and zinc
C. Copper and zinc
D. Copper and tin
27. Which of the following is a supercooled liquid?
A. Teflon
B. Glass
C. Mercury
D. Ice cream
28. Curd is sour due to presence of
A. Acidic acid
B. Tartaric acid
C. Lactic acid
D. Oxalic acid
29. What are Rubies and Sapphires chemically known as
A. silicon dioxide
B. aluminium oxide
C. lead tetraoxide
D. boron nitride
30. Acid rain contains high levels of
A. oxalic acid
B. acetic acid
C. sulphuric and nitric acids
D. carbolic acid
If you like the post please give a rating, and share it with your friends by clicking the share button and commenting below.
Get the Examsbook Prep App Today