Chemistry - Mock Test 17

Question 161

Temperature at which solid starts melting is called ?

A) boiling point B) freezing point C) melting point D) none of above

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Question 162

Conversion of a liquid to a gas at all temperatures is called ?

A) sublimation B) evaporation C) condensation D) boiling

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Question 163

Process in which solid changes directly in to vapors without changing in liquid state is called ?

A) condensation B) evaporation C) boiling D) sublimation

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Question 164

In periodic table, helium is placed at ?

A) top left corner B) bottom right corner C) bottom left corner D) top right corner

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Question 165

Both of elements of 1st period contains valence electrons in ?

A) M shell B) N shell C) K shell D) S shell

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Question 166

Number of protons and neutrons in nucleus if atomic number of element is 17 and mass number is 35, is ?

A) 17 and 18 B) 17 and 19 C) 17 and 20 D) 17 and 21

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Question 167

A balloon filled with 5g of hydrogen contains ?

A) 2.48 moles of H2 B) 3.48 moles of H2 C) 4.48 moles of H2 D) 5 moles of H2

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Question 168

A hydrogen atom is ?

A) 8.40% as massive as C-12 B) 10% as massive as C-12 C) 20% as massive as C-12 D) 30% as massive as C-12

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Question 169

A substance whose all atoms have same atomic number is ?

A) molecule B) atom C) element D) ion

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Question 170

Gram atomic mass of Zn is ?

A) 23g B) 12g C) 63.54g D) 56.67g

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