Q. When was the modern petroleum industry started?

Answer

Correct Answer : 1846

Q. When was the Molotov – Ribbentrop Pact signed?

Answer

Correct Answer : 1939

Q. When was the Ottonian dynasty replaced by the Salian dynasty?

Answer

Correct Answer : 1024

Q. When was the Russian Provisional Government established?

Answer

Correct Answer : 1917

Q. When was the Trans-Siberian Railway completed?

Answer

Correct Answer : 1916

Q. When was the Treaty of Versailles signed?

Answer

Correct Answer : 1919

Q. When was the Tripartite Pact signed?

Answer

Correct Answer : 1940

Q. When was Xerxes I murdered?

Answer

Correct Answer : 465 BC

Q. When were ancient Olympic games held first?

Answer

Correct Answer : 776 BC

Q. When were concave spectacles invented?

Answer

Correct Answer : 1286