Which of the following is not a feature of most of the metals?

Which of the following metals is in liquid state at room temperature?

Which of the following metals can be easily bent with a knife?

Sodium metal is very reactive. It reacts vigorously with water and oxygen and generates a lot of heat. To avoid the vigorous reaction, sodium metal is stored in

Metals are sonorous. What does this mean?

Students were told about displacement reactions. Then, they were asked why copper cannot displace zinc from its salt solution. The correct reasoning is that

Powdered sulphur is heated. It is introduced into a glass jar and covered with a lid. Now, water is added into the jar, lid is placed again and then is shaken well. When a blue litmus is introduced into this jar, it turns red. Which of the following is present inside the jar?

Which mineral forms the centre of chlorophyll in plants?

Copper vessels, when exposed to moist air for long, acquire a coating. What is the colour of this coating?

A teacher demonstrates the following experiment in the lab. Zinc pellets are added to a blue-coloured solution. When kept for some time, the blue colour vanishes and a colourless solution is formed in which a red mass is lying. The teacher tells the students that the colourless solution is zinc sulphate and the red mass is copper. What was the original blue-coloured solution?

A student notices thin silver foils on the sweets in a bakery, and enquires about it. His father says that this is due to a property of metals called malleability. What does this term mean?

Which of the following is used in water purification?

A lady went for a blood test. She was diagnosed to be anaemic. The doctor told her that there is a particular metal in our blood, which was a little less than normal level in her blood. Which of the following is this metal?

An electrician said that proper wiring could be done due to a property of metals called ductility. What does ductile mean?

Metals easily react with sodium hydroxide by evolving a gas. This gas burns with a ‘pop’ sound. Which gas is evolved?