Metals and Non-...

One day, Geeta went to a jeweller's shop to give her old gold jewellery for polish. When she brought the jewellery back, she found that there was a slight loss in its weight. The main reason for weight loss of gold jewellery is when a goldsmith dips the jewellery in

Riya's class teacher explained the physical properties of non-metals. According to her teacher, the non-metal that is in solid state and has lustre is

Raju is a student of class VIII and is curious to know the chemical nature of metals. While testing the chemical nature of metals, he noticed that a metal oxide reacts with dilute solutions of both acids and bases to produce hydrogen gas. This metal oxide is

Match Column - A (non-metal) with Column - B (with their uses).

While performing an experiment in chemistry lab, Ram prepares four solutions in test tubes 'A', 'B', 'C' and 'D', respectively. In test tube 'A', he adds copper sulphate solution. In test tube 'B', he adds zinc sulphate solution. In test tube 'C', he adds magnesium sulphate solution and in test tube 'D', he adds solution of calcium sulphate. After that, he adds iron nails in all test tubes. After some time, he notices that there is change in colour of solution in one of the test tubes. He observes the change in colour in which of the following test tubes and what is the changed colour?

Ram's class teacher, while explaining the acidic and basic nature of metals and non-metals, tells that metallic oxides are basic in nature while non-metal oxides are acidic in nature. According to her, the aqueous solution of oxide that converts blue litmus into red is

According to Sweta's class teacher, metals are good conductors of electricity and heat. She tells Sweta about a liquid metal that is used in thermometers to test body temperature. The name of that liquid metal is

Reeta's mother bought a statue made of copper. After few months, she noticed that the shine of the statue disappeared and green coloured coating appeared on it. The green coloured coating is due to the formation of

A substance 'X', when burnt in air, leaves a white residue. The aqueous solution of this white residue turns red litmus blue. The substance 'X' and its chemical nature is

Which of the following metals should be used to make a tanker to store hot water?

Which of the following properties of aluminium makes it useful to make parts of airplanes?

Directions: Read the given statements carefully and mark the correct answer.

Statement I: Nowadays, instead of copper, aluminium is used to make electrical wires.
Statement II: Aluminium is cheaper than copper, that's why it is a good substitute of copper.

Heena's class teacher told her that silver and gold metals do not react with air and water. But, she noticed that her payal tarnished after some time. The reason of tarnishing of her silver payal is reaction with

While performing an experiment, Rohit added HCl in a test tube containing metal 'X' and no effervescence was produced. This means that no hydrogen gas was produced. According to his class teacher, the metal 'X' is

Riya often feels fatigue and weakness. Her doctor diagnosed her haemoglobin level as being low. This is due to the deficiency of a certain element. The name of the element is