Chemistry - Mock Test 20

Question 191

Molecular formula gives ?

A) simplest ratio of atoms B) actual whole number ratio of atoms C) whole number ratio of atoms D) natural number ratio of atoms

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Question 192

Vinegar contains ?

A) 10% acetic acid B) 5%acetic acid C) 7% acetic acid D) 8% acetic acid

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Question 193

An oxide ion has -2 charge because ?

A) oxygen looses two electrons B) oxygen gains two electrons C) oxygen becomes neutral D) none of above

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Question 194

Compounds have atoms of ?

A) same sizes B) different sizes C) same electrons D) different electrons

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Question 195

Number of protons in nucleus constitute it's ?

A) atomic mass B) atomic number C) nucleon number D) number of neutrons

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Question 196

1 mole of substance refers to ?

A) molar mass B) atomic mass C) electron mass D) neutron mass

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Question 197

Branch of chemistry dealing with plantation and overcoming greenhouse effect is ?

A) Biochemistry B) Organic chemistry C) Environmental chemistry D) Inorganic chemistry

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Question 198

A free radical has ?

A) unpaired electrons B) paired electrons C) no electrons D) even no. of electrons

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Question 199

Smallest part of an element that cannot exist as a free state is ?

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

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Question 200

Formula mass indicates simplest ration between ?

A) cations B) anions C) A and B both D) atoms

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