Chemistry - Comprehensive Mock Test 13

Question 121 Easy

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 122 Easy

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 123 Medium

A substance whose all atoms have same atomic number is ?

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

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Question 124 Easy

Gram atomic mass of Zn is ?

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

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Question 125 Medium

When halogens are exposed to sunlight, they split up in to ?

A) atoms B) ions C) radicals D) molecules

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Question 126 Easy

Cookies and bread rise due to ?

A) conversion of washing soda into CO2 B) conversion of H2O in to CO2 C) conversion of baking soda into O2 D) conversion of baking soda in to CO2

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Question 127 Medium

Substance which has formula mass of 133.5 amu is ?

A) MgCl2 B) S2Cl2 C) BCl3 D) AlCl3

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Question 128 Medium

Mass of carbon present in 44g of carbon dioxide is ?

A) 12g B) 6g C) 24g D) 44g

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Question 129 Medium

Formula which gives simplest whole number ratio of atoms is ?

A) empirical formula B) molecular formula C) chemical formula D) none of above

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Question 130 Easy

Matter is anything that occupies ?

A) space B) has mass C) A and B both D) none of above

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