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Chemistry

Deuterium differs from Hydrogen in having:

A. Different atomic number but same atomic weight

B. Different atomic number and different atomic weight

C. Same atomic number and different atomic weight

D. None

Show Answer

Answer= Option C

Categories Chemistry, Everyday Science Leave a comment

The chemical name of quartz is:

A. Silicon Dioxide

B. Stannous Oxide

C. Aluminium Oxide

D. None

Show Answer

Answer= Option A

Categories Chemistry, Everyday Science Leave a comment

The atmosphere of moon consists of______________?

A. 90% Hydrogen, 10% Nitrogen

B. 80%Nitrogen, 20% Hydrogen

C. 60% Nitrogen, 40%inert gases

D. None

Show Answer

Answer= Option C

Categories Chemistry, Everyday Science Leave a comment

The number of electrons of a neutral atom is automatically known if one knows the?

A. Atomic number

B. Atomic weight

C. Number of orbitals

D. none

Show Answer

Answer= Option A

Categories Chemistry, Everyday Science Leave a comment

Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere?

A. Carbon dioxide

B. Chlorofluorocarbons

C. Nitrogen oxides

D. Methane

Show Answer

Answer= Option B

Categories Chemistry, Everyday Science Leave a comment

Elements are made of _________?

A. Atoms

B. Molecules

C. H2O

D. Compounds

Show Answer

Answer= Option A

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One of the following countries produces maximum energy from atomic reactors?

A. France (80% from its Nuclear Reactors)

B. USA

C. UK

D. none

Show Answer

Answer= Option A

Categories Chemistry, Everyday Science Leave a comment

The Beta particles are fast moving___________?

A. Protons

B. Electrons

C. Neutrons

D. None

Show Answer

Answer= Option B

Categories Chemistry, Everyday Science Leave a comment

The alpha particles are compact clusters of______________?

A. Electron and Proton

B. Two Protons and two Neutrons

C. Three protons and three Neutrons

D. None

Show Answer

Answer= Option B

Categories Chemistry, Everyday Science Leave a comment

Phosphorus is an essential component of one of the following biological molecules:

A. Amino acids

B. Nucleic acids

C. Carbohydrates

D. None

Show Answer

Answer= Option B

Categories Chemistry, Everyday Science Leave a comment
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