Chemistry
Write True or False for the following statements:
(a) Silver is used to make electric cables.
(b) Iodine acts as an antiseptic in the form of tincture of iodine.
(c) Sodium can be cut with a knife.
(d) Antimony is a metal.
(e) Sand is an oxide of silicon.
Related Questions
Fill in the blanks:
(a) The most ductile metal is …………… .
(b) A metal stored in kerosene oil is …………… .
(c) Tungsten metal is a good conductor of …………… .
(d) …………… is a soft metal.
(e) …………… is the hardest compound known to us.
(f) A non-metal used to purify water is …………… .
(g) A metal that gives dazzling effect to crackers when they explode is …………… .
(h) A chemical compound that makes up the striking heads of match sticks is …………… .
Match the following:
Column A Column B (a) Helium (1) electric bulb (b) Neon (2) Thermometer (c) Argon (3) Semiconductor (d) Germanium (4) Weather observation balloons (e) Mercury (5) Advertising signboards The noble gas used in advertising signboards is:
- Helium
- Neon
- Argon
- Krypton
A metal with melting point less than 50°C is:
- Gallium
- Iron
- Gold
- Aluminium