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Chemistry Questions

Question 2686:

The gas given off when NH<sub style='font-size: smaller;'>4</sub>Cl is heated with an alkali is

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A H<sub style='font-size: smaller;'>2</sub>
B CI<sub style='font-size: smaller;'>2</sub>
C N <sub style='font-size: smaller;'>2</sub>
D NH <sub style='font-size: smaller;'>3</sub>

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Question 2687:

A major factor coonsidered in selecting a suitable method for preparing a simple salt is its

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A Crystalline form
B Melting point
C Reactivity with dilute acids
D Solubility in water

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Question 2688:

Which of the following acids forms normal salts only?

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A Tetraoxosulphate (VI) acid
B Trioxosulphate (IV) acid
C Tetraoxophosphate (V) acid
D Trioxonitrate (V) acid

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Question 2689:

A subtance is said to be hygroscopic if it absorbs

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A Water from the atmosphere to form a solution
B Heat from the surrounding
C Carbon (IV) oxide from the atmosphere
D Moisture from the atmosphere without dissolving

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Question 2690:

Which of the following substances increases in mass when heated in air?

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A Sodium chloride
B Lodine crystals
C Magnesium ribbon
D Copper (ll) oxide

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