Which of the following acids would readily react with CaCO3 to liberate CO2?

Which of the following arrangements represents the correct order of electronic energy level?

Which of the following instruments is used in detecting the presence of radiation?

An atom of an element X gains two electrons. The symbol of the ion formed is

The molecule which has a linear shape is

Which of the following statements is correct?

The formula of the compound formed between a trivalent metal, M and a divalent non-metal, Y is

In the periodic table all elements within the same group have the same

The element with electron configuration 1s\(^2\) 2s\(^2\) 2p\(^6\) 3s\(^2\) 3p\(^1\) belongs to