Total number of naturally occurring elements

Which of the following is not a naturally occurring nuclear fuel?

A

Uranium-238

B

Thorium-233

C

Plutonium-239

D

None of the mentioned

Chlorophyll is a naturally occurring chelate compound in which central metal is

A

Copper

B

Magnesium

C

Iron

D

Calcium

In natural uranium, the constituents of three naturally occurring isotopes are

A

U₂₃₄ = 0.006%, U₂₃₅ = 0.712% and U₂₃₈ = 99.282%

B

U₂₃₄ = 0.712%, U₂₃₅ = 0.006% and U₂₃₈ = 99.282%

C

U₂₃₄ = 99.282%, U₂₃₅ = 0.006% and U₂₃₈ = 0.712%

D

U₂₃₄ = 0.006%, U₂₃₅ = 99.282% and U₂₃₈ = 0.712%

Which one is heaviest naturally occurring element of the periodic element?

A

Iron

B

Thorium

C

Rhodium

D

Uranium

The heaviest naturally occurring element is:

A

Mercury

B

Polonium

C

Thorium

D

Uranium

If A has 4 elements and B has 8 elements then the minimum and maximum number of elements in A∪B are respectively __

A

4,8

B

8,12

C

4,12

D

6,12

Naturally he was ---- at the injustice done to his friend.

A

irritated

B

pained

C

cautious

D

furious

Doctors believe that some people are naturally immune _ AIDS.

A

on

B

at

C

during

D

to

The students, thoughts are naturally _ their forthcoming exam .

A

preoccupied on

B

preoccupied with

C

preoccupied to

D

preoccupied by

Main GHG those occur naturally are ……….

A

water vapour, oxygen carbondioxide, methance and ozone.

B

water vapour, carbondioxide, methane nitrous oxide and ozone

C

water vapour, carbondioxide, methance, nitorgen and ozone.

D

oxygen, nitrogen, methane, corbondioxide and carbon monoxide

Total number of naturally occurring elements

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