Chemistry MCQs:

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"The easiest and noblest way is not to be crushing others, but to be improving yourselves."

― Socrates

Science-Chemistry-Multiple Choise Questions & Answers

প্রতিটি প্রশ্নের জন্য চারটি করে উত্তর থাকবে যার একটি সঠিক, বামদিকে A, B, C এবং D এর উপর ক্লিক করে সঠিক উত্তরটি দেখতে পারেন। যদি উত্তর সঠিক হয় তবে অপশনটির ডান দিকে টিক () আর উত্তর ভূল হলে ক্রস () চিনহ প্রদ্ররশিত হবে।

#: 41. Which of the following correctly represents the balanced chemical reaction between aluminium and hydrochloric acid?

A.

Al + HCl3 AlCl3 + H

B.

2 Al + 6 HCl = 2 AlCl3 + 3 H2

C.

Al + 4 HCl3 = 2 AlCl2 + H2

D.

2 Al + 8 HCl = 2 AlCl3 + 4 H2

#: 42. The rate constant of a first order reaction depends on the_________.

A.

time

B.

concentration of the reactant

C.

temperature

D.

concentration of the product

#: 43. what is the molar mass of neon?

A.

14.0067

B.

1.00794

C.

15.9994

D.

20.1797

#: 44. When the following equation is balanced, What is the cofficient for the reaction for Cl2?
        Fe + Cl2 = FeCl3

A.

4

#: 45. Which of the following is Charles' Law equation?

A.

P1/V1 = P2/V2

B.

P1/T1 = P2/T2

C.

V1/T1 = V2/T2

D.

V1/n1 = V2/n2

#: 46. Which one of the following is correct statement?

A.

Boyle's Law = V1/T1 = V2/T2

B.

Combined Gas Law = P1/V1/T1 = P2/V2/T2

C.

Avogadro's Law = P1/V1 = P2/V2

D.

Ideal Gas Law = P1/V1/T1 = P2/V2/T2

#: 47. In every balanced chemical equation, each side of the equation has the same number of_________

A.

molecules

B.

coefficients

C.

moles

D.

atoms

#: 48. Which of the following correctly represents the balanced chemical reaction between Calcium chloride and Sodium carbonate?

A.

CaCl2 + Na2CO3 = CaCO3 + 2 NaCl

B.

2 CaCl + Na2CO3 = 2 CaCO3 + NaCl2

C.

CaCl2 + Na2CO3 = CaCO3 + NaCl

D.

2 CaCl2 + 2 Na2CO3 = 2 CaCO3 + 2 NaCl

#: 49. What does the double arrow symbol mean in chemistry?

A.

heat must be applied

B.

a gas is formed by the reaction

C.

the reaction is reversible

D.

the reaction is completed

#: 50. Who discovered the chemical structure of the element water (H2O)?

A.

Henry Cavendish

B.

Isaac Newton

C.

Antoine Lavoisier

D.

Carl Wilhelm Scheele

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