CHEMISTRY

 

1. The gas used in the manufacture of vanaspati from vegetable oil is

A. hydrogen

B. oxygen

C. nitrogen

D. carbon dioxide

2. The ionic radii of N3-, O2-, F- and Na+ follows the order

A. N3- > O2- > F- > Na+

B. N3- > Na+ > O2- > F-

C. Na+ > O2- > N3- > F-

D. O2- > F- > Na+ > N3-

3. The graphite rods in the nuclear reactor

A. react with U to release energy

B. produce neutrons

C. undergo combustion which triggers the nuclear fission

D. convert fast moving neutrons into thermal neutrons

4. The first metal used by man was

A. iron

B. copper

C. gold

D. bronze

5. The hydronium ion is

A. H+

B. HO -

C. H2+

D. H3O+

6. The most electropositive elements among the following is

A. Na

B. Ca

C. K

D. Cs

ANSWERS:

1. Answer: Option A

2. Answer: Option A

3. Answer: Option D

4. Answer: Option B

5. Answer: Option D

6. 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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