Bromine is —–?

A). Colorless gas insoluble in water

B). A highly inflammable gas

C). A Black solid

D). A red liquid

The metal used in storage batteries —-

A). Iron

B). Lead

C). Copper

D). Zinc

The color of Emerald is

A). Violet

B). Yellow

C). Deep Green

D). Prussian Blue

Permanent hardness of water, due to Sulfates of the metal, can be destroyed by the use of –

A). Nitrates

B). Zeolites

C). Sulphonates

D). None of these

Which of the following characters is not shown by the hydrogen —

A). It burns in air to form water

B). It supports combustion

C). It combines with almost all metals forming hydrides

D). It readily combines with fluorine and chlorine

Which of the following elements is obtained from sea weeds?

A). Argon

B). Sulphur

C). Vanadium

D). Iodine

The metallic constituents of hard water are —

A). Magnesium, Calcium and Tin

B). Iron, Tin and Calcium

C). Calcium, Magnesium and Iron

D). Magnesium, Tin, Iron

The location and energy of an electron in an atom can be specified by—

A). Atomic mass

B). Atomic number

C). Quantum numbers

D). None of these

Old-written material, which cannot be rad easily can be read by—

A). Cosmic rays

B). Ultraviolet rays

C). Infra-Red rays

D). None of these

In an atomic nucleus, neutrons and protons are held together by—

A). Gravitational forces

B). Magnetic forces

C). Exchange forces

D). Columbic forces

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