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Atomic, Molecular and Eq..



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Q1. How many gm moles oxygen are there in 88 gms carbon di oxide?

(a) 1
(b) 2
(c) 3
(d) 4

Q2. Calculate the molecular mass of sucrose(C12H22O11) molecule?

(a) 342 amu
(b) 343 amu
(c) 341 amu
(d) 340 amu

Q3. What?s the formula mass of NaCl?

(a) 23 u
(b) 35.5 u
(c) 58 u
(d) 58.5 u

Q4. What?s the molecular mass of carbon dioxide?

(a) 43
(b) 28
(c) 44
(d) 40

Q5. ______ is the sum of atomic masses of the elements present in a molecule.

(a) Average atomic mass
(b) Atomic mass
(c) Gram formula mass
(d) Molecular mass

Q6. A sample of carbon that contains 70% carbon-12 and 30% carbon-14. What do you think is the average atomic mass of this sample?

(a) 14.5
(b) 14.14
(c) 14
(d) 12

Q7. Nowadays, ?amu? is replaced by ____

(a) u
(b) g
(c) kg
(d) am

Q8. What is the abbreviation of amu?

(a) Atomic matter unit
(b) Atomic mass unified
(c) Atomic mass unit
(d) At mass unity

Q9. What is the mass of hydrogen in terms of amu?

(a) 1.0020 amu
(b) 1.0180 amu
(c) 1.0070 amu
(d) 1.0080 amu

Q10. As, per the current system, carbon-12 has been taken as the standard for measuring atomic masses.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned