Q:

Who invented first working laser?

A) A. H. Taylor	B) W. K. Roentgen
C) T. H. Maiman	D) Fred Morrission

Answer & Explanation Answer: C) T. H. Maiman

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Filed Under: Inventions
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Q:

Who Invented Ceiling fan?

A) Lloyd Groff Copeman	B) Bartolomeo Cristofori
C) Leonardo da Vinci	D) Philip Diehl

Answer & Explanation Answer: D) Philip Diehl

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Q:

Who invented the vacuum pump?

A) Otto von Guericke	B) Cai Lun
C) Melitta Bentz	D) William Henry Fox Talbot

Answer & Explanation Answer: A) Otto von Guericke

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Q:

The system of Budget was introduced in India during the Viceroyalty of

A) Canning	B) Dalhousie
C) Ripon	D) Elgin

Answer & Explanation Answer: A) Canning

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Filed Under: Indian History
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Q:

Gateway of India was built by

A) Frank Lloyd Wright	B) George Wittet
C) Frank Gehry	D) Zaha Hadid

Answer & Explanation Answer: B) George Wittet

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Filed Under: Indian History
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Q:

Grevillea Robusta is the scientific name of _______.

A) Peepal	B) Teak
C) Silver Oak	D) Jack fruit

Answer & Explanation Answer: C) Silver Oak

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Filed Under: Biology
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Q:

Spiders belong to the phylum

A) Mollusca	B) Annelida
C) Cnidaria	D) Arthropoda

Answer & Explanation Answer: D) Arthropoda

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Filed Under: Biology
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Q:

In the reaction H2O2 + Cl2 -----> 2HCl + O2, H2O2 acts as

A) an acid	B) an oxidising agent
C) a reducing agent	D) a base

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