Jharkhand Polytechnic Entrance Exam 2018 Paper – Chemistry

Jharkhand Polytechnic Entrance Exam 2018 Paper – Chemistry

Burning of Mg in air is
(a) Physical change
(b) Chemical Change
(c) Sublimation
(d) Oxidation-reduction

Reaction of marble with atmospheric humidity and Carbon Dioxide to form slaked lime is an example for
(a) Decomposition reaction
(b) Displacement reaction
(c) Combination reaction
(d) Redox reaction

Barium can displace which element from its sulphate?
(a) Sodium
(b) Caesium
(c) Aluminium
(d) Hydrogen

Dissolution of glucose is
(a) Endothermic reaction
(b) Exothermic reaction
(c) Redox reaction
(d) Displacement reaction

Kurkure packet’s empty space is filled with an inert gas, inorder to prevent it from
(a) Reduction
(b) Oxidation
(c) Oxidation-reduction
(d) Precipitation

Transparent photographic films gradually change their colour when exposed to light due to
(a) Combination reaction
(b) Thermal Decomposition
(c) Oxidation reaction
(d) Displacement reaction

Colour of phenolphthalein in acidic medium
(a) Pink
(b) Yellow
(c) Colourless
(d) Orange

Colour of Taj Mahal in Agra is changed due to
(a) Sunlight
(b) Acid rain
(c) Slaked lime
(d) Corrosion

Antacids are used to remove
(a) Body pain
(b) Acidity
(c) Basicity
(d) Headache

pH of orange juice is
(a) 2.00 – 2.35
(b) 3.12 – 3.33
(c) 3.00 – 3.75
(d) 3.30 – 4.19

Acid which helps for the digestion is
(a) Amino acid
(b) Hydrochloric acid
(c) Acetic acid
(d) Citric acid

Water of crystallisation is not present in
(a) Washing soda
(b) Baking soda
(c) Soda lime
(d) Gypsum

Acetic acid reacts with NaOH to produce a salt, whose pH is
(a) Less than 7
(b) Equal to 7
(c) More than 7
(d) Equal to 14

The gas liberated when a metal is treated with acid or base
(a) Oxygen
(b) Nitrogen
(c) Chlorine
(d) Hydrogen

High ductility is observed in
(a) Na
(b) Fe
(c) Au
(d) Mg