Question # 2

EN

The mass of oxygen atom is

UR

Answers

2.657x10-23g -

2.657x1023g -

16g -

32g -

Question # 3

EN

Nickels has isotopes

UR

Answers

3 -

5 -

6 -

11 -

Question # 4

EN

An ordinary microscope can measure the size of object up to:

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400nm -

200nm -

100nm -

500nm -

Question # 5

EN

The number of molecules in one gram molecules of ${CO}_{2}$

UR

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6.02x1023 -

6.02x1022 -

6.27x1027 -

6.02x1024 -

Question # 6

EN

Each molecule of haemoglobin is made up of nearly

UR

Answers

11000ATOMS -

6600ATOMS -

10000ATOMS -

6800ATOMS -

Question # 7

EN

A Swedish chemist J.BERNELIUS determined

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Atomic Number -

Atomic Mass -

Molecular mass -

Ionic mass -

Question # 8

EN

How many isotopes are present in palladium

UR

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Four -

Five -

Six -

Seven -

Question # 9

EN

The number of isotopes Tin are :

UR

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6 -

9 -

11 -

Question # 10

EN

Height of peak in mass spectrum shows

UR

Answers

Number of isotopes -

Mass number -

Relative Abundance -

Number of protons -

Question # 11

EN

Bromine has isotopes

UR

Answers

8 -

6 -

4 -

2 -

Question # 12

EN

Which is the following element can exist in mono atomic form.

UR

Answers

Helium -

Nitrogen -

Chlorine -

Oxygen -

Question # 13

EN

The number of isotopes CD is

UR

Answers

6 -

2 -

9 -

11 -

Question # 14

EN

Positive ion are called:

UR

Answers

Cations -

Anions -

Molecule -

Hydrated ions -

Question # 15

EN

Atom of which of the following element has independent existence?

UR

Answers

Nitrogen -

Oxygen -

Krypton -

Fluorine -

Question # 16

EN

Isotopes are sister atoms of same elements with same chemical properties but different in

UR

Answers

Atomic Number -

Atomic Volume -

Atomic weight -

Atomic structure -

Question # 17

EN

Who determined the atomic mass?

UR

Answers

Maxwell -

J Berzilus -

John Delton -

Newton -

Question # 18

EN

Which is the following is not molecular ion:

UR

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He+ -

CH4+ -

NH4+ -

CO+ -

Question # 19

EN

In mass spectrometer, detector or collector measures the

UR

Answers

Mass of isotopes -

Percentages of isotopes -

Relative abundane of isotopes -

Mass numbers of isotopes -

Question # 20

EN

1A.M.U is equal

UR

Answers

1.661 × 10power17 -

1.661 × 10power24 -

1.661 × 10power34 -

1.661 × 10power36 -

Subject chemistry

Question # 1

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Question # 2

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Question # 3

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Question # 4

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Question # 5

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Question # 6

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Question # 7

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Question # 8

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Question # 9

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Question # 10

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Question # 11

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Question # 12

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Question # 13

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Question # 14

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Question # 15

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Question # 16

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Question # 17

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Question # 18

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Question # 19

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Question # 20

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