did any dissolution of the parliament take place during the monarchy?
Yes, in 1974.
Monarchy of the United Kingdom
When Harold Wilson requested a dissolution late in 1974, the Queen granted his request as Heath had already failed to form a coalition. 
who was the last ruling king of england UNANSWERABLE what is the monarchy of the united kingdom? The monarch and their immediate family undertake various official, ceremonial, diplomatic and representational duties. who heads the monarchy? The Queen. what is the queen's name? The current monarch is Queen Elizabeth II. who was she married to? Prince Philip of Greece and Denmark. was she a part of any war? Yes, second World War. when did she celebrate her golden jubilee? 2002
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Monarchy of the United Kingdom [SEP] Dissolution of Parliament
In 1950 the King's Private Secretary Sir Alan "Tommy" Lascelles, writing pseudonymously to "The Times" newspaper, asserted a constitutional convention: according to the Lascelles Principles, if a minority government asked to dissolve Parliament to call an early election to strengthen its position, the monarch could refuse, and would do so under three conditions. When Harold Wilson requested a dissolution late in 1974, the Queen granted his request as Heath had already failed to form a coalition. The resulting general election gave Wilson a small majority. The monarch could in theory unilaterally dismiss the prime minister, but in practice the prime minister's term nowadays comes to an end only by electoral defeat, death, or resignation.