Test Details

Nuclei

Based on first unit

Feb 11, 1:00 PM

30 minutes

Feb 11, 1:30 PM

35.0 marks

MCQ

15 questions

Sushil Sir

मैं एक अध्यापक हूं और हम भौतिक विज्ञान रसायन विज्ञान और गणित पढ़ाते हैं।

Class Details

Physics & Chemistry

चाणक्यनीति

Physics & Chemistry

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Question Text

Question 2 :
Deuterium is the most common isotope of hydrogen. How many neutrons does it have?

Question 5 :
Mass of one twelth of carbon atom is called atomic mass unit.

Question 6 :
To obtain an isotope of a given radioactive atom, the atom must emit

Question 7 :
Statement 1: $_6^{13}C$ and $_6^{14}C$ are isotopes of the element carbon. Statement 2: Isotopes of an element have the same number of protons in the nucleus but have a different number of neutrons.

Question 8 :
What is the mass of one atom of $C-12$ in grams?

Question 9 :
Specific heat of any element is 0.1. The nearest atomic wt. of that element will be-

Question 11 :
X, Y, and Z are three atoms belonging to the same element. The atoms have mass numbers in the order X < Y < Z. They differ in their number of neutrons by one unit and they exist in the ratio of 1 : 1 : 2. What is the average atomic mass of this element if the atomic mass of the lightest isotope is A?

Question 12 :
A beam of $16 MeV$ deutrons from a cyclotron falls on a copper block. The beam is equivalent to a current of 15$\mu A$. At what rate do the deutrons strike the block?

Question 13 :
Parto of the uranium decay series is shown $_{92}U^{238} \rightarrow _{90}Th^{234} \rightarrow _{91}Pa^{234}\rightarrow$ $_{92}U^{234} \rightarrow _{90}Th^{230}\rightarrow _{88}Ra^{226}$ How many pairs of isotopes are there in the above series :

Question 14 :
The atomic mass of a hypothetical element X is 33.42 amu. A 27.22 g sample of X combines with 84.10 g of another hypothetical element Y to form the compound XY. The atomic mass of Y is:

Question 15 :
How many neutrons does the most common isotope of hydrogen have?

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