(i) and (ii)
(ii) and (iii)
(ii) and (iv)
(i) and (iv)

" ">

Which of the following in Fig. 4.2 do not represent Bohr’s model of an atom correctly?
(i) and (ii)
(ii) and (iii)
(ii) and (iv)
(i) and (iv)
"

Academic Chemistry NCERT Class 9

Correct Answer: (c) (ii) and (iv)

Explanation: The first shell can have a maximum of 2 electrons and the second shell can have a maximum of 8 electrons hence ii and iv do not represent Bohr’s model of an atom correctly.

Tutorialspoint

Updated on: 10-Oct-2022

29 Views

Which one of the following depicts the correct representation of the atomic radius(r) of an atom?(i) and (ii)(ii) and (iii)(iii) and (iv)(i) and (iv)"
Which of the following are compounds?(i) CO (ii) No(iii) NO (iv) Co(a) (i) and (ii)(b) (ii) and (iii)(c) (i) and (iii)(d) (ii) and (iv)
Which of the following are not ionic compounds?KClHClCCl4NaCl(a) (i) and (ii)(b) (ii) and (iii)(c) (iii) and (iv)(d) (i) and (iii)
Which of the following are the correct characteristics of isotopes of an element?(i) same atomic mass(ii) same atomic number(iii) same physical properties(iv) same chemical properties(a) (i), (ii) and (iv)(b) (ii), (iii) and (iv)(c) (ii) and (iii)(d) (ii) and (iv)
Which of the following are also considered to be the states of matter?(i) Plasma (ii) Platelets(iii) BEC (iv) BHC(a) (i) and (ii)(b) (ii) and (iii)(c) (i) and (iii)(d) (ii) and (iv)
Consider the list of terms given below:$(i)$. Tsunami $(ii)$. Landslides$(iii)$. Floods $(iv)$. LightningEarthquakes can cause$(a)$. $(i)$, $(ii)$ and $(iii)$ $(b)$. $(ii)$ and $(iv)$ $(c)$. $(ii)$, $(iii)$ and $(iv)$ $(d)$. $(iii)$ and $(iv)$
Which of the following are physical changes?Melting of iron metalRusting of ironBending of an iron rodDrawing a wire of iron metal(a) (i), (ii) and (iii)(b) (i), (ii) and (iv)(c) (i), (iii) and (iv) (d) (ii), (iii) and (iv)
Which among the following are not the functions of testes at puberty?(i) formation of germ cells (ii) secretion of testosterone (iii) development of placenta(iv) secretion of estrogen (a) (i) and (ii) (b) (i) and (iii) (c) (ii) and (iv) (d) (iii) and (iv)
Which of the following are homogeneous in nature?icewoodsoilair(a) (i) and (iii)(b) (ii) and (iv)(c) (i) and (iv) (d) (iii) and (iv)
A list of mediums is given below$(i)$. Wood $(ii)$. Water$(iii)$. Air $(iv)$. VacuumIn which of these mediums can sound travel?$(a)$. $(i)$. and $(ii)$$(b)$. $(i)$., $(ii)$. and $(iii)$$(c)$. $(iii)$. and $(iv)$$(d)$. $(ii)$., $(iii)$. and $(iv)$
Which of the following metals exist in their native state in nature?CuAuZnAg(a) (i) and (ii)(b) (ii) and (iii)(c) (ii) and (iv)(d) (iii) and (iv)
Which of the following are chemical changes?(i) decaying of wood(ii) burning of wood(iii) sawing of wood(iv) hammering of a nail into wood(a) (i) and (ii) (b) (ii) and (iii)(c) (iii) and (iv) (d) (i) and (iv)
Which of the following process/processes release heat?(i) condensation (ii) vaporisation(iii) freezing (iv) melting(a) only (i)(b) only (iv)(c) (i) and (iii)(d) (ii) and (iv)
Dalton’s atomic theory successfully explainedLaw of conservation of massLaw of constant compositionLaw of radioactivityLaw of multiple proportion(a) (i), (ii) and (iii)(b) (i), (iii) and (iv)(c) (ii), (iii) and (iv)(d) (i), (ii) and (iv)

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements