Question # 1

Which metal has the lowest melting point?

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Li

Na

Rb

K

Washing clothes at 140 ^oF uses almost the energy as at 140 ^oF wash

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Half

Thrice

Twice

None of the above

When we mvoe from top to bottom in a group atomic size.

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Decrease

Increases

First increases then decreases

None of the above

How many elecntrons are present in the valence shell of group 1 elements.

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1

2

3

4

When acids react with metal with carbonates and bicarbonates which gas is produced.

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N2

H2

Cl2

CO2

Which of the following is Bronsted base?

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HCl

CH3COOH

H2O

NH3

Which compund has same molecular and emiprical formula.

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C6H12 O6

H2O2

H2O

C6H6

What will be the relative atomic mass of nitrogen given the abundance of its two isotopes, ¹⁴ N and ¹⁵N are 99.64 and 0.35

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14.0210

14.2100

14.0021

14.1200

When a chemical reaction is carried out with a substancZ; a gas is produced which turns red litmus paper blue. What is the reaction?

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Reaction of an acid with a meal carbonate

Reactin of an alkali with ammonium salt

Reaction of an acid with ammonium salt

None of these

Number of neurtons in ²⁷M₁₃are

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13

14

27

15

Octet rule is

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Attainign of eight electrons in its valence shell

Discription of eight electrons

Pictur eof electronic configuration

Pattern of electronic configuration

How many moles are there in 25 g of H₂SO₄?

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0.765 Moles

0.255 moles

0.4 moles

0.51 moles

Point out the incorrect statement about electron affinity

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It decreases in a period

It decreases in a group

It is measure din kJmol-1

None of these

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