Q:

Is boiling water a chemical change?

Answer

No. Boiling water is not a chemical change. Because in this process it doesn't loss its properties. It just changes its state i.e, from liquid state to gaseous.

Hence, Boiling water is a Physiacl change and not a chemical change.

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Q:

Which measurement describes the pressure of a gas?

A) 450 mm Hg	B) 315 K
C) 251 g/cub.cm	D) None of the above

Answer & Explanation Answer: A) 450 mm Hg

Explanation:

450 mm Hg denotes the air pressure.

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Q:

Microorganisms that cause disease are called

A) Pathogens	B) Microbes
C) Infectees	D) None of the above

Answer & Explanation Answer: A) Pathogens

Explanation:

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Q:

Which microscope is often used to view metal surfaces?

A) Optical microscopes	B) Scanning tunneling microscopes
C) Electron microscopes	D) None of the above

Answer & Explanation Answer: B) Scanning tunneling microscopes

Explanation:

Microscopes are of three types. They are :

1) Optical microscopes

2) Electron microscopes

3) Scanning tunneling microscopes

Which_microscope_is_often_used_to_view_metal_surfaces1538720175.png image

Scanning tunneling microscopes are the microscopes that are used to view metal surfaces.

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Q:

Anaerobic glycolysis occurs without

A) water	B) glucose
C) oxygen	D) All of the above

Answer & Explanation Answer: C) oxygen

Explanation:

Anaerobic glycolysis is the transformation of glucose to lactate when limited amounts of oxygen (O2) are available.

Hence, Anaerobic glycolysis occurs without oxygen.

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Q:

The headquater of UNESCOis at

A) Rome	B) Geneva
C) Paris	D) New York

Answer & Explanation Answer: C) Paris

Explanation:

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Filed Under: World Organisations

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Q:

Which statement is true of all atoms that are anions?

A) The atom has more electrons than protons	B) The atom has more protons than electrons
C) The atom has equal number of protons and electrons	D) All of the above

Answer & Explanation Answer: A) The atom has more electrons than protons

Explanation:

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Q:

On January 3, 2018, RBI initiated ‘PCA’ against the Allahabad Bank. How many public sector banks have been covered under ‘PCA’?

A) 18	B) 17
C) 11	D) 15

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