CHEMISTRY

 

1. The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of 

A. atomic structure

B. metallurgy

C. periodic table of contents

D. discovery of elements 

2. The formula C6H5-CO-CH3 represents 

A. Acetone

B. Acetic acid

C. Acetophenone

D. Phenyl acetate 

3. The metal that is usually extracted from sea water is 

A. Ca

B. Na

C. K

D. Mg 

4. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

A. liquation

B. leaching

C. levigation

D. magnetic separation 

5. The inert gases are ____ in water 

A. sparingly soluble

B. insoluble

C. soluble

D. None of these 

6. The molecular formula of phosphorous is 

A. P1

B. P2

C. P3

D. P4 

7.   The maximum number of covalent formed by nitrogen is

A. 1

B. 2

C. 3

D. 4

ANSWERS:

1. Answer: Option C

2. Answer: Option C

3. Answer: Option D

4. Answer: Option C

5. Answer: Option A

6. Answer: Option D

7. Answer: Option D

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Milan Tomic

Hi. I’m Designer of Blog Magic. I’m CEO/Founder of ThemeXpose. I’m Creative Art Director, Web Designer, UI/UX Designer, Interaction Designer, Industrial Designer, Web Developer, Business Enthusiast, StartUp Enthusiast, Speaker, Writer and Photographer. Inspired to make things looks better.

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