ECAT Pre Engineering Chemistry Chapter 6 MCQ Test With Answer

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Sr.#	Question	Answer
1	Which of the following has polar bond	A. O₂ B. N₂ C. HCl D. Cl₂
2	If two lone pairs are present then bond angle of tetrahedral compound reduces to ______ degrees	A. 109.5° B. 107.5° C. 104.5° D. None
3	The ionic bonds are	A. Unidirectional B. Bi-directional C. Non-directional D. Multi-directional
4	Which of the following statements is not correct regarding bonding molecular orbitals?	A. Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed B. Bonding molecular orbitals have low electron density between the two nuclei C. Every electron in the bonding molecular orbitals contributes to the attraction between atoms D. Bonding molecular orbitals are formed when the electron waves undergo constructive interference
5	Which of the hydrogen halides has the highest percentage of ionic character	A. HCl B. HBr C. HF D. HI
6	The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1: 1 is	A. Distrillation B. Crystallization C. Vapourisation D. Colour spectrum
7	On the basis of VSEPR theory SO₂is a	A. Liner molecule B. A bent molecule C. A strong molecule D. A gaseous molecule
8	The overlapping of two partially filled atomic orbital is in such a way that the probability of finding the electron pair is maximum along the axis joining the two nuclei, the bond is	A. Sigma bond B. Pi bond C. Ionic bond D. Non-polar bond
9	Which of the following geometry is associated with the compound in which the central atom assumes sp³d hybridization?	A. Planar B. Pyramidal C. Angular D. Trigonal bipyramidal
10	The number of bonds in nitrogen molecule is
11	Planar geometry of molecules is due to	A. sp³hybridization B. sp²hybridization C. sp hybridization D. P - p overlap
12	Shielding effect intervening electrons causes	A. Decreases in atomic radii in a period from right to left B. Increase in atomic radii in a period from left to righ t C. Decrease in atomic radii down the group D. Increase in atomic radii down the group
13	Which of the following hydrides has the lowest boiling point?	A. H₂O B. H₂S C. H₂S3 D. H₂Te
14	H-bonding is not present in	A. Glycerine B. Water C. Hydrogen sulphide D. Hydrogen fluride
15	Which of the following is a polar molecules	A. Carbon dioxide B. Carbon tetrachloride C. Methanol D. Ethane
16	The formation of compounds like PF₅, BCI₃, SF₆indicates that	A. These halides are ionic B. These halides are covalent C. They are Lewis acids D. Octet rule not obeyed so the rule is not universal
17		A. Excitantion of an electron from 2s to 2p-orbital B. Transfer of three electrons from B to the other atoms C. Excitation of two electrons form 2s orbital to 2p orbital D. Formation of molecular ion
18	Outer shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be	A. XY B. X₂Y C. X₂Y₃ D. XY₂
19	Elements have the tendency to attain 8 electrons in their valence shell. This is known as	A. Octer rule B. Hunds rule C. Pauli exclusion principle D. Auf ban principle
20	According to MO Theory, the species O₂+ possesses	A. bond order of 2.5 B. three unpaired C. diamagnetic character D. stability lower then O₂
21	The force which holds the atoms together to form a compound is called	A. A chemical bond B. Van der waal's force C. Dispersion force D. London force
22	All covalent bonds formed between the two atoms are non-polar when	A. Covalent bond between two non-metal atoms B. Covalent bond between metal and non-metal C. Covalent bond between two atoms of same element D. Covalent bond between metal atoms
23	The degree of polarity of molecule is known as its	A. Dipole moment B. Moment arm C. Bond energy D. Ionic character
24	The covalent bonds are	A. Unidirectional B. Bi-directional C. Non-directional D. Multi-directional
25	Generally electron affinities for elements in a period from left to right	A. Decreases B. Increases C. Remain same D. Increases alternatively
26	The atomic radius of hydrogen is 37	A. Pecometer B. Manometer C. Angstrom D. Micrometer
27	Fluorine molecule is formed by	A. The axial p-p overlap B. The sidewise p-p overlap C. The axial s-p overlap D. The overlap of two sp²hybrid orbitals
28	Shape of CIO₃is	A. Triangular pyramidal B. Tetrahedral C. Triangular planar D. Triangular bipyramidal
29	The bond order in No is 2.5 while that in NO⁺is 3.Which of the following statements is true for these two species?	A. Bond length in NO⁺is greater than in NO B. Bond length in unpredictable C. Bond length in NO⁺is equal to that in NO D. Bond length in NO is greater than in NO⁺
30	Which of the following molecules have multiple bonds	A. CH₄ B. C₂H₄ C. C₂H₆ D. CCI₄

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ECAT Pre Engineering Chemistry Chapter 6 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 6 Chemical Bonding

ECAT Chemistry Chapter 6 Chemical Bonding

The electronegativity of elements in a period from left to right

SnCI2have ______ shape

Which of the following hydrides has the lowest boiling point?

The degree of polarity of molecule is known as its

Which of the hydrogen halides has the highest percentage of ionic character

The boiling point of heavy water is

Water H2O is liquid while hydrogen sulphide H2S is a gas beause

Coordinate covalent bond is present in the molecules

Ionic radius, in a period from left to right

The bond angle H - O - H in ice ins closest to

The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1: 1 is

The structure of ICI2is

Nitrogen in NH3is sp3hybridized but the bond angle in NH3is 107° and not 109.5° due to

Noble gases have the electronic configuration with their valance shell ns2np6except one

Which of the following species is paramagnetic?

Which of the following statements is not correct regarding bonding molecular orbitals?

A molecule in which sp2hybrid orbitals are used by the central atom in forming covalent bonds in

An ionic compound M2S3is formed by the metal M,, the metal is

Which of the following molecules have sp3hybridized carbon

The driving force for making a bond is

Which of the following molecules have multiple bonds

Covalent compounds are soluble in

The shape of methanol, ammonia and water molecule can be explained by assuming

Molecular orbital picture of N2 indicates

The shape of CIO-3according to valence shell electron pair repulsion theory will be

The covalent bonds are

Shape of CIO3is

Which of the following charge

In H2O molecule the bond angle is

N-atom forms three covalent bonds, its electronic configuration is

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SnCI₂have ______ shape

Water H₂O is liquid while hydrogen sulphide H₂S is a gas beause

The structure of ICI₂is

Nitrogen in NH₃is sp³hybridized but the bond angle in NH₃is 107° and not 109.5° due to

Noble gases have the electronic configuration with their valance shell ns²np⁶except one

A molecule in which sp²hybrid orbitals are used by the central atom in forming covalent bonds in

An ionic compound M₂S₃is formed by the metal M,, the metal is

Which of the following molecules have sp³hybridized carbon

Molecular orbital picture of N₂indicates

The shape of CIO^-₃according to valence shell electron pair repulsion theory will be

Shape of CIO₃is

In H₂O molecule the bond angle is