Which of the following elements is a metal?
- Nitrogen
- Oxygen
- Sodium
- Sulphur
Which of the following is a non-metal?
- Sodium
- Magnesium
- Calcium
- Phosphorus
Which of the following metals is the most reactive metal among the following?
- Lead
- Iron
- Copper
- Mercury
When cinnabar (an ore of mercury) is heated in the presence of oxygen, the gas evolved is:
- O₂
- SO₂
- SO₃
- CO₂
An alloy is a mixture of:
- metals
- Metals & non-metls
- Non-metals
- Both [a] and [b]
The unwanted materials or impurities present in the ores are called
- Mineral
- Alloy
- Gangue
- Corrosion
Rusting of iron can be prevented by:
- Painting
- Galvanisation
- Greasing
- All of above
Which of the following is an alloy of mercury?
- Brass
- Solder
- Amalgam
- Chinnabar
Which one of the following statements is incorrect?
- Potassium reacts with oxygen to form basic oxide.
- Copper reacts with dilute hydrochloric acid to form copper chloride and hydrogen gas.
- Magnesium nitrate is formed when magnesium reacts with dilute nitric acid.
- All the above
Few metals are given below. Zn, Sn, Ag, Na, Ca Arrange the above given metals from least reactive to most reactive.
- Sn<Na<Zn<Ca<Ag
- Ag<Zn<Sn<Na<Ca
- Ag<Sn<Zn<Ca<Na
- Zn<Sn<Ag<Ca<Na
In the given chemical reaction, which metal is more reactive?
FeSO₄+Zn→ZnSO₄+Fe
- Fe
- Zn
- O₂
- None
Which one of the following metals is more reactive than hydrogen?
- Ag
- Au
- Pb
- Hg
In which one of the following displacement reaction does not occur?
- Copper metal with silver nitrate solution.
- Copper metal with sodium chloride solution.
- Silver metal with iron sulphate solution.
- Both [b] and [c]
Which one of the following statements is correct?
- All metals are electropositive in nature.
- Metals are good reducing agents.
- All alkali metals can be cut by a knife.
- All the above
Phosphorus tri-chloride is:
- Ionic chloride
- Covalent chloride
- Metallic chloride
- None
Which one among the following is an amphoteric oxide?
- Al₂O₃
- P₂O₅
- N₂O
- Fe₂O₃
Which one of the following metals exists in liquid state at room temperature
- Ag
- Cr
- Hg
- Br
An element M forms an oxideM₂O. An aqueous solution of M₂O 0 turns n litmus paper blue. The nature of the oxide M₂O is:
- Neutral oxide
- Acidic oxide
- Basic oxide
- None
Which one of the following is the best electrical conductor?
- Copper
- Silver
- Aluminium
- Xenon
Which pair of compounds are not ionic?
- KCl and HCl
- CCl₄ and CH₄
- CCl₄ and NaCl
- KCl and CCl₄