881. Which one of the following gives a white precipitate with the aqueous solution of BaCl2?
(A) NaHCO3
(B) NaNO3
C. Na2CO3
D. Na2CrO4
882. Deliquescence is a property in which a solid?
A. Absorbs moisture and remains solid
B. Absorbs moisture and turns to liquid form
C. Loses water of crystallization
D. Increases the number of water of crystallization
883. In the diaphragm celllevel of brine in the anode compartment is kept slightly higher, which prevents?
A. Hydroxide ions to reach the anode
B. Chlorine gas to mix
C. Cathode to decay
D. All of the above
884. Alkali and alkaline earth metals impart colors when heated over a burner. It is due to?
A. Smaller electronegativity of alkali metals
B. Smaller ionic radius of these metals
C. De-excitation of electrons from higher energy levels to low energy level
D. Excitation of electrons from low energy levels to higher energy levels
885. The first ionization potential of alkaline earth metal is greater than alkali metals because?
A. They are more reactive
B. They have greater atomic radii
C. They have smaller atomic sizes
D. All
886. NaOH is named as caustic soda because?
A. It corrodes organic tissues
B. It is used in soda water
C. It reacts with chlorine gas
D. It reacts with fats to form soap
887. Chemical used for cloud seeding for artificial rains is?
(A) Potassium Bromide
(B) Silver Nitrate
C. Silver Iodide
(D) Potassium Nitrate
888. Electric fuse is an alloy of?
(A) Zinc and lead
B. Tin and lead
(C) Copper and Iron
(D) Carbon and Tin
889. Maximum permissible concentration of total hardness in drinking water is?
(A) 50
(B) 100
C. 200
(D) 500
890. The sewage obtained from water closets and urinals is known as?
(A) Garbage
(B) Sullage
(C) Industrial waste
D. Sanitary waste
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