alloys, carbon & its various forms, hydrogen & compounds, sulphur, nitrogen, halogen & inert gases - Category wise Question and Answer Practice Test with Solutions

Question : 16 [UPPCS (Mains) 2011]

Which is used as Laughing gas?

a) Nitrogen dioxide

b) Nitrogen trioxide

c) Nitrous oxide

d) Nitrogen tetra oxide

Question : 17 [UPRO/ARO (Pre) 2014]

In order to compensate the deficiency of which of the following elements, the insectivorous plants trap and eat insects?

a) Nitrogen

b) Magnesium

c) Manganese

d) Sulphur

Question : 18 [PCS (Pre) 2013]

Which of the following is not optically active?

a) Alanine

b) Serine

c) Glycine

d) All of these

Question : 19 [PCS (Pre) 2011]

Pencil lead is

a) Coal

b) Graphite

c) Charcoal

d) Lamp black

Question : 20 [UPPCS (Pre) 2002]

The important metal used with iron produce stainless steel is

a) Carbon

b) Tin

c) Aluminium

d) Chromium