Question # 1

In whcih state of matter does not hae definite shape and volume.

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Liquid

Gas

Solid

All of these

A nceklaee has 6 g of diamonds in it . What are the numberof carbon atoms in it?

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3.01 x 10²³

1.003 x 10²³

12.04 x 10²³

6.02 x 10²³

Which of the following elemens is presnet in 1st period.

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Hydrogen

Helium

Both a and b

None of these

The mass of one molecule of water is.

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18 g

18 mg

18 kg

18 amu

Proton are feflected toward plate.

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Positive

Negative

Both a and b

None of these

How many atom of carbon are present in one molecule of glucose.

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11

22

12

6

Pure alkalis metals can be cut siply by knife but iron cannot bccause of alkali meals have

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Non metalic bonding

Strong metallic bonding

Weak metallic bonding

Moderate metqllic bonding

Group nuebr tells about the

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Number of shells

Number of valence electrons

Both a and b

None of these

Elements of Group1 are called.

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Alkali Metlas

Alkali earth metals

Transition metals

Halogen

Rutherford used a gold foil in his experiment, which had a tickness of

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0,0002 cm

0,0001 cm

0.001 cm

0.00004cm

Why has isotopes not been shown int he periodic table.

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Isotopes do not show periodic behavior

Periodic tble cannot accomodate a large number of isotopes of different elements

All the isotops have same atomic number so there is no need to give them separate places

Someof the isotopes are unstble and they give rise to different elements.

If the Delta H value is negative then reaction witll be

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Endotermic

Exothermic

May or may not be exothermic or endothermic

None of these

Whcih one of the following in as electron deficient molecule.

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NH3

O2

BF3

N2

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