RSMSSB JSA Chemistry 2019 Paper

RSMSSB Junior Scientific Assistant Chemistry Paper 2019

When impurity is added to a liquid, the surface tension will
(a) Decreases
(b) Increases
(c) First decreases and then increases
(d) Remains same

If the liquid is in equilibrium with its vapours at its boiling point, then the molecules in the two phases have equal
(a) Potential energy
(b) Kinetic energy
(c) Total energy
(d) Intermolecular forces

The fraction of volume occupied by atoms in body centered cubic unit cell is
(a) 0.32
(b) 0.48
(c) 0.68
(d) 0.74

Which of the following statements is not correct?
(a) NaCl has Frenkel defect and CaF2 has Schottky defect
(b) AgCl has Frenkel defect and CsCl has Schottky defect
(c) Frenkel defect and Schottky defect are Stocichiometric defect
(d) AgBr show both Frenkel as well as Schottky defect

The value of osmotic pressure depends on
(a) Concentration of solute
(b) Concentration of solvent
(c) Concentration of solution
(d) Concentration of substrate

Which of the following depends on the temperature?
(a) Molarity
(b) Molality
(c) Mole fraction
(d) Weight percentage

Solubility of a gas in liquid increases with
(a) Increase in pressure and increase in temperature
(b) Increase in pressure and decrease in temperature
(c) Decrease in pressure and decrease in temperature
(d) Decrease in pressure and increase in temperature

If V is the velocity, E is the electric field then the electrophoretic mobility is given by
(a) E/V
(b) V/E
(c) 1/EV
(d) EV

Which of the following is a corrosive posion
(a) Strong acid
(b) Mercury
(c) Opium
(c) Alcohol

Phosphine liberated in the stomach in aluminium phosphide poisoning is toxic to all except
(a) Lungs
(b) Kidneys
(c) Liver
(d) Heart

Which of the following is a deadly poison?
(a) KClO3
(b) KMnO4
(c) KCN
(d) KOH