1. Get the key of a minimum value from the following dictionary.

dict = {
  'Physics': 82,
  'Math': 65,
  'history': 75
}

min(dict, key=dict.get)

'Math'

2. Write a Python program to check if value 200 exists in the following dictionary.

sample_dict = {'a': 100, 'b': 200, 'c': 300}
if 200 in sample_dict.values():
    print('200 present in a dict')

200 present in a dict

3. Merge two Python dictionaries into one

dict1 = {'Ten': 10, 'Twenty': 20, 'Thirty': 30}
dict2 = {'Thirty': 30, 'Fourty': 40, 'Fifty': 50}

dict3 = {**dict1, **dict2}
print(dict3)

{'Ten': 10, 'Twenty': 20, 'Thirty': 30, 'Fourty': 40, 'Fifty': 50}