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Which of the following salts is stable to heat?
If a solution has a pH of 2, it can be concluded that it
The gas evolved when dilute tetraoxosulphate (VI) acid reacts with sodium hydrogen trioxocarbonate (IV) is
Which of the following gases is colourless, odourless and soluble in potassium hydroxide solution?
9.60 g of a gas X occupies the same volume at 0.30 g of hydrogen under the same conditions. Calculate the molar mass of X [H = 1]
Which of the following increases as boiling water changes to steam?
What are the values of x and y in the following equation? \(^{234}_{90}\)Th → \(^y_x\)Pa + ß- particle
What is the shape of a molecule of CCI4?
A radioactive solid is best stored
Which of the following non-metals reacts most readily with metals?
Electrostatic force of attraction between sodium ion and halide ion is greatest in
Which of the following contains co-ordinate covalent bond?
The type of chemical bond that exists between potassium and oxygen in potassium oxide is
Electrovalent compounds are characterized by
An element Z has a combining power of 3. Which of the following formulae is correct of its compounds?
Chlorine atom forms \(Cl^{-}\) by
The atoms of four elements are represented as 20Q, 16R, 10S and 8T Which of the elements would be unreactive?