Question 1 :
The elements present in the core of earth are collectively known as
Question 5 :
In the compound {tex} \mathrm {M-O-H}{/tex}, the {tex} \mathrm {M-O}{/tex} bond will be broken if
Question 8 :
Which of the following elements will have the lowest first ionisation energy?
Question 9 :
Atoms with three of their outer most orbits incompletely filled with electrons are present in:<br/>
Question 10 :
As one moves along a given row in the Periodic Table, ionisation energy
Question 11 :
<p>Which one of the following statements about stable configuration is not correct?</p>
Question 12 :
The total number of valency electrons for <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f724fdd8313cc8725e17"> ion is:
Question 14 :
What is the valency of $\displaystyle { C }_{ 2 }{ O }_{ 4 }$ ion?
Question 18 :
a) The substance which loses electrons is called reducing agent. <br/>b) The substance which gains electrons is called oxidizing agent. <br/>Find out which is true or false statement. <br/>
Question 20 :
Which of the following properties show gradual decrease with increase in atomic number across a period in the Periodic Table?
Question 23 :
The element with atomic number 117 if discovered would be placed in
Question 24 :
In a multi-electron atom, the energy of a <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f7a5a3d2442ab8292d24"> -orbital is :
Question 26 :
Which of the following sets of atomic numbers corresponds to the atomic numbers of inert gases belonging to periods which contain 4d and 5d transition series?
Question 27 :
Match the atomic numbers 4, 14, 8, 15, and 19 with a gas of valency 2.
Question 33 :
The correct order of ionisation energy for comparing carbon, nitrogen and oxygen is
Question 35 :
As we move along a period, the valency of elements :
Question 37 :
The electronic configuration of calcium is $2,\,8,\,8,\,2$. Find the valency of the element?
Question 40 :
A covalent bond is formed between the atoms by the overlapping of orbitals containing:
Question 41 :
Which one of the following statements about unstable configuration is not correct?
Question 42 :
Both lithium and magnesium display several similar properties due to diagonal relationship, however, the one which is incorrect, is
Question 44 :
The <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f8eca3d2442ab829307f"> of nitrogen in <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f88efdd8313cc872624d"> is :
Question 46 :
Write the electronic configuration of the element whose atomic charge and mass is 11 times and 23 times of the hydrogen.
Question 47 :
An atom with atomic number 20 is most likely to combine chemically with the atom whose atomic number is:
Question 48 :
The bond between two identical non-metal atoms has a pair of electrons:
Question 51 :
Neon and chlorine have atomic numbers $10$ and $17$ respectively. Their valencies will be ______ and ______ respectively.
Question 52 :
The statement that is not correct for periodic classification of element is
Question 54 :
The elements which exhibit both vertical and horizontal similarities are called:
Question 56 :
If Aufbau rule is not followed, $K-19$ will be placed in .................... block.
Question 57 :
Which of the following does not have valence electron in 3d-subshell?
Question 58 :
$965$ amp current is passed through molten metal chloride for one minute and $40$ seconds during electrolysis. The mass of metal deposited is $9gm$ at the cathode. The valency of metal atom (at.wt$=27$) is:
Question 59 :
An element 'A' forms a chloride $ACl_4$. The number electronic in the valence shell of 'A'. <br>
Question 60 :
The ratio of masses of oxygen and nitrogen of a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is:
Question 66 :
When an element of very low ionisation potential is allowed to react with an element of very high electron affinity, we get:
Question 67 :
The ionisation energy of nitrogen is larger than that of oxygen because of
Question 68 :
Two ice cubes are pressed over each other and unite to form one cube. Which force is responsible for holding them together?
Question 69 :
The $+3$ ion of which one of the following has half-filled $4f $ subshell?<br/>
Question 71 :
One would expect the elemental form of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f794a3d2442ab8292ccd"> at room temperature to be:
Question 74 :
A trend common to both group I and VII elements in the Periodic Table as atomic number increases is
Question 75 :
The statement that is true for the long form of the Periodic Table is
Question 78 :
In which of the following crystals of ionic compounds would you expect maximum distance between the centres of cations and anions
Question 79 :
When the first ionisation energies are plotted against atomic number, the peaks are occupied by
Question 81 :
Point out the wrong statement. On moving horizontally from left to right across a period in the Periodic Table
Question 83 :
The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is:
Question 85 :
The ionic radii of isoelectronic species <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f80ffdd8313cc87261b0"> are in the order?
Question 88 :
At ordinary temperature and pressure, among halogens, the chlorine is a gas, bromine is a liquid and iodine is a solid. This is because:
Question 91 :
The energy change accompanying the process given below is,<br> <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f843a3d2442ab8292e69">
Question 92 :
Which of the following phenomenon will occur when two atoms of same spin will react?
Question 94 :
The basis of keeping the elements in the groups of The Periodic Table is
Question 95 :
Which of the following is not the correct order for the stated property?
Question 96 :
<img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7f70da3d2442ab8292c5b"> has higher boiling point than expected, because :
Question 99 :
The correct order in which the first ionisation potential increases is
Question 100 :
Which one of the following statements is incorrect in relation to ionisation enthalpy?
Question 101 :
$0.7\ g$ of $Na_{2}CO_{3}. xH_{2}O$ is dissolved in $100\ ml, 20\ ml$ of which required $19.8\ ml$ of $0.1\ N\ HCl$. The value of $x$ is:
Question 102 :
Among cellulose, polyvinyl chloride, nylon and natural rubber, in which of the polymer intermolecular force of attraction is weakest?
Question 103 :
Assertion: Transition metals show variable valence.
Reason: Due to a large energy difference between the $ ns^2 $ and $ ( n - 1)d $ electrons.
Question 104 :
The valency of Cr in the complex $\left[ \mathrm { Cr } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 4 } \mathrm { Cl } _ { 2 } \right] ^ { + }$
Question 105 :
The oxidation state of Barium in $Ba({ H }_{ 2 }{ PO }_{ 2 }{ ) }_{ 2 }$  is: