Chemistry Chapter Stoichiometry Mcqs

#33
The pair of species having different percentage (mass) of carbon is

A) CH₃COOH & C₆H₁₂O₆

B) CH₃COOH & C₂H₅OH

C) CH₃COH₃ & H₃CCH₂COH

D) C₂H5OH & CH3OCH3

Answer: B

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#34
The total number of neutrons present in 54 mL H₂O(1) are (dw 0.99 g/ml)

A) 23.7 NA

B) 22NA

C) 20NA

D) 16NA

Answer: A

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#35
The number of neutron in 5 g of D₂O are :

A) 0.25NA

B) 2.5NA

C) 1.1NA

D) NA / 5

Answer: B

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#36
The mass of one molecular of H₂O is ?

A) 18g

B) 18g / NA

C) NA / 18g

D) 18g NA

Answer: B

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#37
How many moles of KMnO₄ will contains 0.25 mole of oxygen?

A) 0.1mole

B) 1g

C) 6.02 x 10²² molecules

D) 0.006 mole

Answer: D

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#38
One mole of P4 molecules contains:

A) 1 molecule of P

B) 4 molecules of P

C) 1/4 NA atoms of P

D) 24.088 x 10²³atoms of P

Answer: D

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#39
11.2 liter of a gas at STP weighs 14g . The gas could not be:

A) N₂

B) CO

C) B₂H₆

D) N₂O

Answer: D

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#40
Consider the reaction

Al (OH)₃ + 2HCl → 3H₂O + AlCl₃

_{If 14.0 grams of aluminum hydroxide are allowed to react with hydrochloric acid, how much aluminum chloride is produced?}

A) 14.0 g

B) 17.9 g

C) 23.9 g

D) 30 g

Answer: C

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Chemistry

#33 The pair of species having different percentage (mass) of carbon is

A) CH3COOH & C6H12O6 B) CH3COOH & C2H5OH C) CH3COH3 & H3CCH2COH D) C2H5OH & CH3OCH3

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#34 The total number of neutrons present in 54 mL H2O(1) are (dw 0.99 g/ml)

A) 23.7 NA B) 22NA C) 20NA D) 16NA

Comments:

#35 The number of neutron in 5 g of D2O are :

A) 0.25NA B) 2.5NA C) 1.1NA D) NA / 5

Comments:

#36 The mass of one molecular of H2O is ?

A) 18g B) 18g / NA C) NA / 18g D) 18g NA

Comments:

#37 How many moles of KMnO4 will contains 0.25 mole of oxygen?

A) 0.1mole B) 1g C) 6.02 x 1022 molecules D) 0.006 mole

Comments:

#38 One mole of P4 molecules contains:

A) 1 molecule of P B) 4 molecules of P C) 1/4 NA atoms of P D) 24.088 x 1023 atoms of P

Comments:

#39 11.2 liter of a gas at STP weighs 14g . The gas could not be:

A) N2 B) CO C) B2H6 D) N2O

Comments:

#40 Consider the reaction Al (OH)3 + 2HCl → 3H2O + AlCl3 If 14.0 grams of aluminum hydroxide are allowed to react with hydrochloric acid, how much aluminum chloride is produced?

A) 14.0 g B) 17.9 g C) 23.9 g D) 30 g

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#33
The pair of species having different percentage (mass) of carbon is

A) CH₃COOH & C₆H₁₂O₆

B) CH₃COOH & C₂H₅OH

C) CH₃COH₃ & H₃CCH₂COH

D) C₂H5OH & CH3OCH3

#34
The total number of neutrons present in 54 mL H₂O(1) are (dw 0.99 g/ml)

A) 23.7 NA

B) 22NA

C) 20NA

D) 16NA

#35
The number of neutron in 5 g of D₂O are :

A) 0.25NA

B) 2.5NA

C) 1.1NA

D) NA / 5

#36
The mass of one molecular of H₂O is ?

A) 18g

B) 18g / NA

C) NA / 18g

D) 18g NA

#37
How many moles of KMnO₄ will contains 0.25 mole of oxygen?

A) 0.1mole

B) 1g

C) 6.02 x 10²² molecules

D) 0.006 mole

#38
One mole of P4 molecules contains:

A) 1 molecule of P

B) 4 molecules of P

C) 1/4 NA atoms of P

D) 24.088 x 10²³atoms of P

#39
11.2 liter of a gas at STP weighs 14g . The gas could not be:

A) N₂

B) CO

C) B₂H₆

D) N₂O

#40
Consider the reaction

Al (OH)₃ + 2HCl → 3H₂O + AlCl₃

_{If 14.0 grams of aluminum hydroxide are allowed to react with hydrochloric acid, how much aluminum chloride is produced?}

A) 14.0 g

B) 17.9 g

C) 23.9 g

D) 30 g