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Periodic table Quiz-07

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NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1.   When ionic compounds get dissolved in water:
  •  They involve heat changes
  •  Inter-ionic attraction is reduced
  •  Ions show dipole-ion attraction with water molecules
  •  All are correct
Solution
(d) If the lattice energy < hydration energy, then only ionic compounds are soluble.

Q2.   If Aufbau rule is not followed, K-19 will be placed in
  •  s-block
  •  p-block
  •  d-block
  •  f-block
Solution
(c) If Aufbau rule is not followed then 19th electron in K enters in 3d sub-shell, not in 4s

Q3.   Which of the following has lowest bond angle?
  •  BeF_2
  •  H_2 O
  •  NH_3
  •  CH_4
Solution
(b) Bond angles of BeF_2,H_2 O,NH_3 and CH_4 are 180°,104°31^',106°50^',109°28' respectively.

Q4.   The hydrogen bonding is strongest in:
  •  O-H⋯S
  •  S-H⋯O
  •  F-H⋯F
  •  F-H⋯O
Solution
(c) H-bonding order: ⋯H-F>⋯H-O>⋯H-N

Q5.   Which one of the following has the highest electronegativity?
  •  Si
  •  P
  •  Cl
  •  Br
Solution
(c) Electronegativity increases in a period from left to right and decreases in a group on moving downwards

Q6.   Which is correct about ionisation potential?
  •  It is independent of atomic radii
  •  It increases with increase in atomic radii
  •  It remains constant with increase in atomic radii
  •  It decreases with increase in atomic radii
Solution
(d) We know that ionisation potential gradually decreases on moving down the group while atomic size increases as we move down the group. Hence, larger the atomic size, smaller is ionisation potential.

Q7.   Valency means:
  •  Combining capacity of an element
  •  Atomicity of an element
  •  Oxidation number of an element
  •  None of the above
Solution
(a) It is the definition of valency.

Q8.   Which of the following statements is most correct? Effective nuclear charge of an atom depends on:
  •  The atomic number of the atom
  •  The charge on the ion
  •  The shielding effect
  •  Both the actual nuclear charge and the shielding effect
Solution
(d) These are factors on which effective nuclear charge depends.

Q9.   As the s-character of hybridization orbitals increases, the bond angle:
  •  Increases
  •  Decreases
  •  Does not change
  •  Becomes zero
Solution
(a) Bond angle for sp,sp^2 and sp^3-orbitals are 180°,120° and 109°28' respectively.

Q10.   The correct order of bond angles is:
  •  PF_3
  •  PF_3
  •  PI_3
  •   PF_3>PCl_3
Solution
(d) PCl_3PCl_3, bond angle order is explained in terms of pπ-dπ bonding in PF_3.


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Periodic table Quiz-07
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