NCERT Class 10 Science — Chapter 3: Metals and Non-metals

Which property of metals primarily justifies their use in making school bells?

Which metals are known to evolve hydrogen gas even when reacting with very dilute nitric acid?

Metals in the middle of the activity series are commonly found in the earth's crust primarily in which forms?

What defines an amalgam in the context of alloys?

Assertion (A): Bromine is a non-metal that is liquid at room temperature. Reason (R): All non-metals exist only as solids or gases at room temperature.

Which method involves protecting iron or steel by applying a thin layer of zinc?

Which physical nature is generally characteristic of ionic compounds?

Which oxide is formed when copper is heated in air?

Which property of metals is directly responsible for their shiny appearance after polishing?

Which composition yields stainless steel with high rust resistance?

Which of the following elements is a liquid non-metal at room temperature?

Which metal evolves hydrogen gas even when reacting with very dilute nitric acid?

Which set of metals reacts with steam to form oxides and hydrogen, but does not react with cold or hot water?

Which reducing agent is commonly used for converting zinc oxide to zinc?

Which metal starts floating on water because hydrogen bubbles adhere to its surface?

In which state do ionic compounds conduct electricity effectively?

Which of the following metals is considered the most ductile?

What is the chemical composition of the green coating that slowly develops on copper exposed to moist air?

Consider the following statements regarding the physical property of hardness in metals: 1. All metals possess uniform hardness irrespective of their type. 2. The hardness of metals varies significantly from one metal to another. 3. Alkali metals are extremely hard and cannot be cut with a knife. Which of the statements given above is/are correct?

The process of heating a carbonate ore in limited air to convert it into an oxide is known as:

Which process involves coating iron with a thin layer of zinc to prevent corrosion?

Which of the following pairs of metals represents the best conductors of heat?

Which of the following non-metals is an exception to the general non-lustrous nature of non-metals?

Which pair of metals has such low melting points that they can melt on the palm of a hand?

What is the primary reason that calcium starts floating when it reacts with water?

Where is hydrogen placed in the activity series relative to common metals?

Which property of metals refers to their ability to have a shining surface?

Which of the following metals is considered the most malleable?

Which soluble salt is most abundantly present in seawater?

What is the chemical formula of the ore cinnabar?

Which sequence correctly describes the extraction of mercury from cinnabar (HgS)?

What is the primary purpose of the enrichment (concentration) of ores before metal extraction?

Which of the following pairs is correctly identified as amphoteric metal oxides?

Which of the following sequences correctly represents the decreasing order of reactivity of metals with dilute hydrochloric acid?

Which of the following non-metals is known for having a lustrous appearance?

Which pair of metals shows negligible reaction with oxygen even at high temperatures?