Atomic Structure(Chemistry ) Questions and answers for exam Preparation

Question 1. Value of 'm' depends upon values of

s
l
d
f

Explanation:-

Answer: Option B. -> l
Answer: (b).l

Question 2. To explain origin of spectral lines

one quantum number is sufficient
no quantum number is needed
one quantum number is not enough
one quantum number adds up with another one

Explanation:-

Answer: Option C. -> one quantum number is not enough
Answer: (c).one quantum number is not enough

Question 3. Balmer series were discovered in

1867
1887
1789
1901

Explanation:-

Answer: Option B. -> 1887
Answer: (b).1887

Question 4. Aluminium foil causes cathode rays to

pass through it
struck in it
distort
loose their identity

Explanation:-

Answer: Option A. -> pass through it
Answer: (a).pass through it

Question 5. Distance between two adjacent crests or troughs is called

wave number
frequency
wave length
radiation

Explanation:-

Answer: Option C. -> wave length
Answer: (c).wave length

Question 6. Elements which are found on their own as free elements are

gold and silver
coal and gold
nitrogen and gold
gold and mercury

Explanation:-

Answer: Option C. -> nitrogen and gold
Answer: (c).nitrogen and gold

Question 7. Losing a small molecule from the original organic molecule is

elimination reaction
substitution reaction
addition reaction
none of above

Explanation:-

Answer: Option A. -> elimination reaction
Answer: (a).elimination reaction

Question 8. Chemical elements contains only

one type of atom
two type of atom
molecules
ions

Explanation:-

Answer: Option A. -> one type of atom
Answer: (a).one type of atom

Question 9. 1.67x10⁻²⁷ kg is the weight of a single atom of

oxygen
nitrogen
hydrogen
water

Explanation:-

Answer: Option C. -> hydrogen
Answer: (c).hydrogen

Question 10. The most composition of sun is mainly

oxygen and hydrogen
hydrogen
hydrogen and helium
helium

Explanation:-

Answer: Option C. -> hydrogen and helium
Answer: (c).hydrogen and helium