a2zinterviews

13.	The working of the quartz crystal in the watch is based on the
	A.  Photoelectric effect
	B.  Johnson effect
	C.  Edison effect
	D.  Piezo electric effect

Answer

Ans: D Piezo electric effect

14.	In fireworks, the green flame is produced because of
	A.  Barium
	B.  Potassium
	C.  Sodium
	D.  Mercury

Answer

Ans: A Barium

15.	Biological death of a patient means death of tissues of the
	A.  Brain
	B.  Heart
	C.  Lungs
	D.  Kidney

Answer

Ans: A Brain

16.	Monazite is an ore of
	A.  Iron
	B.  Thorium
	C.  Titanium
	D.  Zirconium

Answer

Ans: B Thorium