(A) D
(B) A
(C) E
(D) C
The answer is: (D) C
Tag: chemistry mcqs
One atomic mass unit (amu) is a mass unit equal to exactly one-twelth the mass of a ________ atom.
(A) carbon-8
(B) carbon-12
(C) carbon-16
(D) carbon-20
The answer is: (B) carbon-12
A ________ consists of the elements in any one horizontal row of the periodic table.
(A) block
(B) base
(C) group
(D) period
The answer is: (D) period
An electrolyte is a substance that produces ________ solution when dissolved in water.
(A) conducting
(B) nonconducting
(C) poorly conducting
(D) B and C
The answer is: (A) conducting
The molecular formula of surcose (sugar or table sugar) is
(A) C6H12O6
(B) C12H22O11
(C) C6H12
(D) C12H22
The answer is: (B) C12H22O11
The atomic mass unit (amu) is equal to
(A) 1.66054×10–15 kg
(B) 1.66054×10–19 kg
(C) 1.66054×10–23 kg
(D) 1.66054×10–27 kg
The answer is: (D) 1.66054×10–27 kg
Isotopes are atoms whose nucleus have the same number of _____ but different number of _____.
(A) protons, neutrons
(B) protons, electrons
(C) neutrons, electrons
(D) electrons, positrons
The answer is: (A) protons, neutrons
The mass number is the total number of _____ and _____ in nucleus of an atom.
(A) protons, neutrons
(B) protons, electrons
(C) neutrons, electrons
(D) electrons, positrons
The answer is: (A) protons, neutrons
Which of the following class has the largest number of animals?
(A) Fishes
(B) Insects
(C) Mammals
(D) None of these
The answer is (B) Insects
The process of preserving meat by stewing in a covered earthenware jug is called:
(A) Burial
(B) Jugging
(C) Curing
(D) None of these
The answer is (B) Jugging