Across
1. The reaction in which a more reactive metal can displace a less reactive metal from its salt
solution (12)
4. Silver, gold and platinum are
called
metals (5)
6. A non-metal used in the
preparation of ammonia (8)
7. The non-metal that is liquid in
state (7)
8. Reacts vigorously with cold
water (6)
Down
1. Metals that can be drawn into wires (7)
2. Metals that produce sound on being struck with a hard material (8)
3. Metals are
in lustre (5)
(5)
7
8
5. Argon, neon, helium, etc. do not react and are called
Answers
Answer:
1)The displacement of more reactive metal from a less reactive metal is known as the displacement reaction.
A chemical reaction wherein the more reactive metal displaces the lest reactive metal from its compound is known as the displacement reaction.
4)Platinum and gold are called noble metals because of stability and do not react with other metals. Both resist oxidation and corrosion.
6)It is prepared from hydrogen and nitrogen by Haber process. In Haber process first of all nitrogen and hydrogen gases are dried and mixed in the ratio of 1:3 by volume
7)The only non metal which is liquid at room temperature is Bromine(Br).
8)The alkali metals (Li, Na, K, Rb, Cs, and Fr) are the most reactive metals in the periodic table - they all react vigorously or even explosively with cold water, resulting in the displacement of hydrogen
DOWN
1)Some metals like gold can be drawn out into wires or beaten into sheets only a few atoms thick and still retain their strength. Copper, gold, iron, silver and aluminium are used extensively in flat sheets, foil, and wire because they are highly malleable and ductile.
Elements: Gold; Silver; Mercury (element)
Child material class: Bronze
2)On being struck hard, the metals produce a ringing sound. Due to this property, they sonorous. For example – the school bell produces a loud ringing sound when stuck with the hammer hard. Some examples are – Iron, Gold, Copper, Aluminium, Magnesium, and many more.
Elements: Gold; Copper; Iron; Potassium; Sodium
3) Metals have the quality of reflecting light from its surface and can be polished e.g., gold, silver and copper.
Elements: Gold; Copper; Potassium; Sodium; Silver...
5)They are called inert or noble gases. They do not react because their octet (outermost shell which requires 8 electrons to be stable) is complete with 8 electrons( for Helium, Argon, Krypton etc. Basically the group 18 elements). ... Since these elements are already stable, they refuse to form bonds with any other element.
Answer:
DOWN
1 malleable
2 sonorous
3 lustrous
5 non metals
ACROSS
1 displacement reaction
4 metals
7 mercury