Question

8) An atom with a8 electrons in its outermost shell is chemically __ [ ]
A) stable
B) unstable
C) both
D) None

9) An atom can achieves octet by ______ of electrons [ ]
A) transfer
B) sharing
C) both A & B
D) None

10) The valexy of N2 molecule is ______ [ ]
A) 1
B) 2
C) 3
D) 4

11) The number of valency electrons in sulphide S is __ [ ]
A) 8
B) 9
C) 10
D) 16

12) H 2 1 is called [ ]
A) Tritium
B) Hydrogen
C) Deuterum
D) None

13) The first model of an antom was given by _______ [ ]
A) J J Thomson
B) Rutherford
C) Bohr
D) Goldstein

14) n = 3 represants the ________ [ ]
A) K - shell
B) L - shell
C) M - shell
D) N – shell

15) Alpha ( cx ) particle scaltering experiment led to the discovery of [ ]
A) electrons
B) protons
C) neutrons
D) nucleus

16) _____ are not the parts of nucleus. [ ]
A) protons
B) Electrons
C) Positrons
D) Neutrons

17) The concept of ‘atom’ is indivisible is proposed by [ ]
A) J J thompson
B) Goldstein
C) Bohr
D) Dalton

18) Rutherford’s model is also known as ______ [ ]
A) Plum Puddingmodel
B) Nuclear model
C) Watermelon model
D) Positive model

19) The isotope of ____ is used in treatment of cancer. [ ]
A) Iron
B) Sodium
C) Iodine
D) Cobalt

20) The isotopes of Uranium is used as fuel in _______ reactors [ ]
A) Thermal
B) Hydro
C) Wind
D) Nuclear​

Answer 1

Answer: উষ্ণতার কোন স্কেলে উষ্ণতার মান ঋণাত্বক হয় না?

Explanation: উষ্ণতার কোন স্কেলে উষ্ণতার মান ঋণাত্বক হয় না?