Subject Category > Physics

Q. In fireworks, the green flame is produced because of

A) Potassium

B) Sodium

C) Mercury

D) Barium

✔ Barium

Additional Information > Exam point of View

In fireworks, the green flame is produced because of the presence of barium compounds, which emit green light when burned.

Asked Question

Q 1.Silver Mirror test is given by which one of the following compounds?1. Benzophenone2. Acetaldehyde3. Acetone4. Formaldehyde

Right Answer : 2 and 4

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Q 2.Which of the following is not written by Munshi Premchand

Right Answer : Guide

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Q 3.Who is the author of the book New India?

Right Answer : Annie Besant

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Q 4.Who is known as 'the father of Indian missile technology'?

Right Answer : Dr. A.P.J. Abdul Kalam

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Q 5.Bats can fly in the dark because

Right Answer : they produce high pitched sounds called ultrasonics

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Q 6.The journalist who refused to accept Padma Bhushan was

Right Answer : Khushwant Singh

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Q 7.Guwahati is situated on the bank of the river

Right Answer : Brahmaputra

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Q 8.The phenomenon of summer sleep by animals is called

Right Answer : aestivation

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Q 9.Camouflage is one way animals protect themselves. Is this pronoun reflexive or intensive?

Right Answer : reflexive

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Q 10.Which of the Following is an Amorphous solid?

Right Answer : Quartz Glass(Sio2)

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