901. The oxides of beryllium (BeO) is_______________?
A. Acidic
B. Basic
C. Amphoteric
D. Neutral
902. Li is different from its family members due to____________________?
A. Small size
B. High charge density
C. Less electropositivity
D. All of the above
903. Carbonates of lithium are not stable like that of sodium due to________________?
A. Low electronegativity
B. Low electropositivity
C. Low charge density
D. Not known yet
904. Which one of the following is not an alkali metal?
A. Francium
B. Caesium
C. Rubidium
D. Radium
905. Wax used for making a candle is chemically a mixture of?
(A) Aromatic Hydrocarbons
B. Aliphatic Hydrocarbons
(C) Cyclic Hydrocarbons
(D) Aliphatic and Aromatic Hydrocarbons
906. Silver halides are used in photographic plates because they are?
A. Reduced by light
B. Totally colorless
(C) Soluble in hypo solution
(D) Oxidized in air
907. Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful?
(A) Solar infrared radiation
B. Solar ultraviolet radiation
(C) CO2 in the air
(D) SO2 in the air
908. Laughing gas is?
A. Nitrous oxide
B. Nitric oxide
C. Nitrogen trioxide
D. Nitrogen pentoxide
909. Which of the following is a method of disposing of solid waste that cannot be reused or recycled?
A. Incineration
B. Landfills
C. Pyrolysis and Gasification
D. All of the above
910. Which of the following is a greenhouse gas?
(A) Sulphur dioxide
B. Carbon dioxide
(C) Helium
(D) Nitrogen
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