(A) 23
(B) 65
(C) 88
(D) 109
Answer: (A) 23
Category: Chemistry MCQs Class 9
Chemistry solved multiple choice questions (MCQs) for class 9 with answers.
Value of Plank’s constant is _____.
(A) 6.626×10-30 J.s
(B) 6.626×10-32 J.s
(C) 6.626×10-34 J.s
(D) 6.626×10-36 J.s
Answer: (C) 6.626×10-34 J.s
Which Isotope is used in nuclear reactors?
(A) U-234
(B) U-238
(C) U-235
(D) All of these
Answer: (C) U-235
What is the mass of 4 moles of Hydrogen gas?
(A) 8.064 gram
(B) 4.032 gram
(C) 1 gram
(D) 1.008 gram
Answer: (A) 8.064 gram
If one mole of carbon contains x atoms, then what is the number of atoms contained in 12 grams of Mg?
(A) x
(B) 0.5 x
(C) 2 x
(D) 1.5 x
Answer: (B) 0.5 x