Привет, друзья! Сегодня я хочу поделиться с вами информацией о самых выгодных акциях и товарах от компании “Купер”. “Купер” – это известный бренд, который специализируется на производстве качественной одежды и аксессуаров. У них всегда можно найти стильные и модные вещи ...Read more
What type of oxides are formed when non-metals combine with oxygen?
Numa HussainMaster
Differentiate between metal and non-metal on the basis of their chemical properties.
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Я решил посетить мегамаркет, чтобы купить продукты на неделю. После того, как я загрузился в машину и отправился в путь, я вспомнил, что мне нужно проверить актуальные акции и скидки на официальном сайте мегамаркета. По прибытии домой, я сразу же ...Read more
Numa HussainMaster
Give reasons (a) Platinum, gold and silver are used to make jewellery. (b) Sodium, potassium and lithium are stored under oil. (c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking. (d) Carbonate and sulphide ores are usually ...Read more
Numa HussainMaster
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Numa HussainMaster
Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in figure below. (a) What will be the action of gas on (i) dry litmus paper? (ii) moist litmus ...Read more
Numa HussainMaster
In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?