R4RIN – MCQs, Mock Tests | Chemistry Chemistry MCQ Question -Periodic Classification

Inner transition elements are called

1. Lanthanides
2. Actinides
3. Rare earth metals
4. All

✅ Correct Answer: 4

Seventh period contains ______________ normal elements

1. 2
2. 4
3. 6
4. 8

✅ Correct Answer: 1

Modern periodic table has been divided in _______ blocks

1. 2
2. 4
3. 7
4. 8

✅ Correct Answer: 2

Non-metals usually form ______________ oxides

1. Acidic
2. Amphoteric
3. Neutral
4. Neutral

✅ Correct Answer: 1

Amphoteric exides are those which possess ________ properties

1. Acidic
2. Basic
3. Acidic and basic
4. Neutral and acidic

✅ Correct Answer: 3

Best position of hydrogen in the periodic table is above I.A Group which is mainly due to

1. Both are electropositive
2. Similar outer most shell electronic configuration
3. Both form ionic compounds
4. All

✅ Correct Answer: 4

Hydrogen resembles with carbon because of having

1. Same number of electrons in the valence shell
2. Similar physical state
3. Remarkable reducing properties
4. Homovalent (show same valency)

✅ Correct Answer: 3

Which one of the following sets consists of all coinage metals?

1. Cu Hg Au
2. Cu Ag Au
3. Ag Au Hg
4. Cu Fe Au

✅ Correct Answer: 2

In which of the following pairs are elements belonging to the same group?

1. Boron & Beryllium
2. Nitrogen & Phosphorous
3. Magnesium & Aluminium
4. Gallium & Helium

✅ Correct Answer: 2

Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way?

1. The nature of its oxides
2. The charge on its ions
3. The formula of its oxide
4. Its number of isotopes

✅ Correct Answer: 4

Which one of the following is not a periodic property?

1. Melting point of elements
2. Boiling point of elements
3. Ionization energy of elements
4. Coordination number of ions

✅ Correct Answer: 4

The atomic radii decreases by increasing atomic number in

1. Alkali metal
2. Alkaline earth metal
3. Elements from Li to Ne
4. Halogens

✅ Correct Answer: 3

Which discovery caused a revision in the periodic law as stated by Mendeleev?

1. Location of nucleus by Rutherford
2. Atomic number by Moseley
3. X-rays by Roentgen
4. Natural radioactivity by Henry Bacquerel.

✅ Correct Answer: 2

An element has electronic conviguration 1s2 2s2 2p2. It belongs to

1. Group II-A
2. Group IV-A
3. Group VII-A
4. Group VI-A

✅ Correct Answer: 2

The property which increases upto group IV-A then decreases onwards

1. Ionization energy
2. Atomic radii
3. Melting & boiling points
4. Atomic volume

✅ Correct Answer: 3

Which of the following ion is stable in aqueous solution?

1. H+
2. H-
3. Cl-
4. All are stable

✅ Correct Answer: 3

The atoms of same element having same atomic number but different mass number are called

1. Isobars
2. Isomers
3. Isotopes
4. Isotropes

✅ Correct Answer: 3

Deuterium reacts with oxygen to form

1. Hard water
2. Heavy water
3. Soft water
4. Water gas

✅ Correct Answer: 2

Which order of ionization energy is correct

1. Mg < A1
2. Si > P
3. Mg > A1
4. both b & c

✅ Correct Answer: 3

Ionization energy depends upon

1. Nuclear charge
2. Atomic size
3. Shielding effect
4. I.E depends upon all of the above and nature of orbital

✅ Correct Answer: 4

Shielding effect across the period

1. Increases
2. Decreases
3. Can not be predicted
4. Remains constant

✅ Correct Answer: 4

Addition of 2nd electron to a uninegative ion is always

1. Exothermic
2. Endothermic
3. Data is insufficient
4. Unpredictable

✅ Correct Answer: 2

Higher value of electron affinity means

1. Atom will lose electron easily
2. Atom will gain electron easily
3. Atom may form di-positive ion
4. The reason is unknown

✅ Correct Answer: 2

Metallic characters of alkali metals

1. Increase down the group
2. Decrease down the group
3. No regular trend
4.

✅ Correct Answer: 1

Melting points of VII-A group elements down the group

1. Increase
2. Decrease
3. Remain constant
4. No regular trend

✅ Correct Answer: 1

Oxidation state of an atom represents

1. Number of electrons gained
2. Number of electrons lost
3. Apparent charge in compound
4. Its vacancies

✅ Correct Answer: 3

Which of the following possesses maximum hydration energy?

1. Na+
2. K+
3. Mg+2
4. Ca+2

✅ Correct Answer: 3

Halides in which halogen atoms act as a bridge between two atoms of the other element are called

1. Covalent halides
2. Electronegative halides
3. Polymeric halides
4. Polymeric hydrides

✅ Correct Answer: 3

Less electronegative elements such as Be Ga A? etc form

1. Polymeric halide
2. Covalent halide
3. Ionic halide
4. All

✅ Correct Answer: 1

Iodine is solid due to

1. Strong covalent bond
2. Large value of dipole moment
3. High polarizability
4. Strong hydrogen bonding

✅ Correct Answer: 3

True increasing order of acidity of the oxides of Mn is

1. MnO < MnO2 < Mn2O7
2. Mn2O7 > MnO2 > MnO
3. MnO2 > MnO > Mn2O7
4. MnO2 > Mn2O7 > MnO

✅ Correct Answer: 1

Keeping in view the size of atom which order is correct one?

1. Mg > Sr
2. Ba > Mg
3. Lu > Ce
4. C1 > I

✅ Correct Answer: 2

Which one of the following element has highest exidation state in its compounds?

1. Cr
2. Mn
3. Sn
4. O

✅ Correct Answer: 2

Which of the following cannot exist in solution

1. O-2
2. H+
3. Cl-
4. Na+

✅ Correct Answer: 1

Which of the following is different with respect to physical appearance?

1. Arsenic
2. Phosphorus
3. Antimony
4. Bismuth

✅ Correct Answer: 2

Which one of the followings possesses melting point below 0?C?

1. Nitrogen
2. Phosphorus
3. Carbon
4. Bismuth

✅ Correct Answer: 1

Compounds of nitrogen and phosphorus are mostly

1. ionic
2. covalent
3. polar
4. all varieties are possible

✅ Correct Answer: 2

The most electronegative element among the following is

1. Sb
2. N
3. As
4. P

✅ Correct Answer: 2

SO3 is not absorbed in water directly because

1. Reaction is exothermic
2. It is insoluble in water
3. Dilute acid is produced
4. All of above

✅ Correct Answer: 1

Phosphene gas will be produced if phosphorous acid is subjected to

1. Oxidation
2. Reduction
3. Decomposition
4. Both b & c

✅ Correct Answer: 4

Which of the following will give phosphoric acid one reaction with water

1. PCI5
2. P2O3
3. P2O5
4. All of the above

✅ Correct Answer: 4

Which one of following is not a property of pure quartz?

1. Coloured solid
2. Brittle
3. Hard
4. All of above

✅ Correct Answer: 1

Phosphorus is a Greek word and it means

1. Light bearing
2. Fire
3. Impure
4. Tetrahedral

✅ Correct Answer: 1

Which of the following does not contain phosphorus?

1. Yolk of egg
2. Bone
3. Nerves
4. Steel

✅ Correct Answer: 4

Allotropic form of phosphorus that is poisonous is

1. White
2. Red
3. Black
4. Violet

✅ Correct Answer: 1

Which one of the following is not the use of graphite?

1. Lead pencils
2. Abrasive
3. Lubricant
4. Electrode of electrolytic cell

✅ Correct Answer: 2

Acetic anhydride can be obtained by treating ethyl alcohol with

1. P2O5
2. H2SO4
3. Both a and b
4. PCI5

✅ Correct Answer: 3

The composition of brown ring in nitrate test is

1. FeSO4.No
2. FeSO4.No2
3. FeSO4.No3
4. FeSO4.N2o

✅ Correct Answer: 1

Phosphorous acid upon thermal decomposition yields phosphoric acid and

1. Phosphine
2. Phosphorus
3. Water
4. Phosphorus pentoxide

✅ Correct Answer: 1

Which one of the following compounds usually smells like garlic?

1.
2. P2O5
3. H3PO3
4. All have same smell

✅ Correct Answer: 1