VSSC Chemical OPerator Paper 2012

Vikram Sarabhai Space Center Chemical Operator Paper 2012

Which of the following statement is incorrect?
(a) Double salts give positive test for all its constituents
(b) Complex salts contain coordinate covalent bonds
(c) Transition elements form alloys easily
(d) Paragnetism is the property of unpaired protons

Current flows in solutions through
(a) Ions
(b) Electrons
(c) Molecules
(d) Atoms

In electrolysis oxidation takes place at
(a) Cathode
(b) Anode
(c) Electrolyte
(d) Gel bridge

The formula of Urea is
(a) NH2NHCONHNH2
(b) NH2CONH2
(c) NH2COCONH2
(d) NH2CSNH2

Brass is an alloy of
(a) Copper and Tin
(b) Copper and Zinc
(c) Copper, Zinc and Tin
(d) Copper and Nickel

Alkali metals are stored in
(a) Water
(b) Alcohol
(c) Kerosene
(d) Acids

Which is not an inert gas?
(a) Xenon
(b) Krypton
(c) Helium
(d) Rubidium

Allotropic form of elements differ in
(a) Chemical properties
(b) Physical properties
(c) Optical properties
(d) None of theses

Hard water contains
(a) Sodium
(b) Calcium
(c) Uranium
(d) Lead

Compounds which donate protons are called
(a) Acids
(b) Bases
(c) Salts
(d) Complexes