Metals and Non-metals Test - 2

An element reacts with oxygen to give a compound with high melting point. This compound is also soluble in water. The element is likely to be

Which of the following metal exists in the liquid state?

Which of the following pairs will give displacement reaction

An iron nail is dipped in copper sulphate solution. It is observed that

One of the following is not a neutral oxide. This is

Metal A when dipped in solution of salt of metal B ,then metal B is displaced . this shows that

Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?

2 mL each of concentrated HC1, HN03 and a mixture of concentrated HC1 and concentrated HN03 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be

An electrolytic cell consists of i. positively charged cathode ii. negatively charged anode iii. positively charged anode iv. negatively charged cathode

An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following