Mix Test

Result

Mix Test - 1

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which of the following statements is true:

A
Melting point of Phosphorous is less than that of Nitrogen

B
\(N_2\) is highly reactive while \(P_4\) is inert

C
Nitrogen shows higher tendency of catenation than P

D
N-N is weaker than P-P

Solution

N-N is weaker than P-P

Other statements as incorrect as Phosphorus has a higher melting point due to bigger size than Nitrogen. Nitrogen is inert due to formation of triple bonds and has a lower covalence due to non - availability of d –orbitals.
Question 2
1 / -0

Which of the following is a non-stoichiometric defect?

A
Frenkel defect

B
Schottky defect

C
metal deficiency defect

D
interstitial defect

Solution

Metal deficiency defect (anion is missing from lattice site)

In Frenkel defect the smaller ion occupies the interstitial sites and Schottky defect equal number of cations and anions are missing. Interstitial defect an atom or molecule occupies intestinal sites so in these three defects the ratio of positive and negative ions (Stoichiometric) of a solid is not disturbed in these three.
Question 3
1 / -0

Identify the law which is stated as:

“For any solution, the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction.”

A
Henry’s law

B
Raoult’s law

C
Dalton’s law

D
Gay-Lussac's Law

Solution

Raoult’s law - For any solution, the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction.

\(p\propto x\)

\(p=p^\circ x\)

where p = partial vapour pressure,

\(p^\circ\) = Vapour pressure of pure component.

x = mole fraction.
Question 4
1 / -0

Pink colour of LiCl crystals is due to:

A
Schottky defect

B
Frenkel defect

C
Metal excess defect

D
Metal deficiency defect

Solution

Metal excess defect- It creates F-center in the crystal lattice which is due to a type of crystallographic defect in which an anionic vacancy in a crystal lattice is occupied by one or more unpaired electrons and that is responsible for the color.
Question 5
1 / -0

Which of the following isomer has the highest melting point:

A
1,2-dicholorbenzene

B
1,3 -dichlorobenzene

C
1,4-dicholorbenzene

D
all isomers have same melting points

Solution

1,4 dichlorobenzene - The melting points of this isomer will be high due to its symmetric structure and it will form most stable arrangement or we can say a good packing by these molecules can be formed. But other isomers have does not have symmetric nature which may cause little difficulty in the packing of each molecule.

So, para isomer is more symmetric than ortho and meta.
Question 6
1 / -0

Which one of the following reactions is not explained by the open chain Structure of glucose:

A
Formation of pentaacetate of glucose with acetic anhydride.

B
Formation of addition product with 2,4 DNP reagent

C
Silver mirror formation with Tollen’s reagent

D
Existence of alpha and beta forms of glucose.

Solution

Existence of alpha and beta forms of glucose.
Question 7
1 / -0

Williamson’s synthesis of preparing dimethyl ether is an:

A
\(S_N1\) reaction

B
Elimination reaction

C
\(S_N2\) reaction

D
Nucleophilic addition reaction

Solution

\(S_N2\) reaction (Alkoxide ion reacts with primary alkyl halide in a single step to form ether).
Question 8
1 / -0

Chlorine water loses its yellow colour on standing because:

A
HCl gas is produced, due to the action of sunlight.

B
A mixture of HOCl and HCl is produced in the presence of light

C
HOCl and hydrogen gas is produced

D
A mixture of HCl and \(ClO_3\) is produced, due to the action of sunlight

Solution

A mixture of HOCl and HCl is produced in the presence of sunlight \(Cl_2(g)+H_2O(l)\) \(\rightarrow HCl(g)+HOCl(aq).\)
Question 9
1 / -0

Amorphous solids are:

A
isotropic

B
anisotropic

C
isotopic

D
isomeric

Solution

Amorphous solids are: isotropic

(The value of any physical property is same along any direction).
Question 10
1 / -0

Which of the following is an example of a solid solution?

A
sea water

B
sugar solution

C
smoke

D
22 carat gold

Solution

22 carat gold (It is an alloy so solid in solid solution).
Question 11
1 / -0

The boiling points of alcohols are higher than those of hydrocarbons of comparable masses due to:

A
Hydrogen bonding

B
Ion – dipole interaction

C
Dipole- dipole interaction

D
Van der Waal’s forces.

Solution

Hydrogen bonding (Alcohols form intermolecular hydrogen bonds).
Question 12
1 / -0

Which of the following has the lowest boiling point:

A
\(H_2O\)

B
\(H_2S\)

C
\(H_2Se\)

D
\(H_2Te\)

Solution

\(H_2S\) (Boiling point increases down the group but water forms strong hydrogen bonds so has higher boiling point than \(H_2S).\)
Question 13
1 / -0

Which of the following statement is correct:

A
Fibrous proteins are generally soluble in water

B
Albumin is an example of fibrous proteins

C
In fibrous proteins, the structure is stabilised by hydrogen bonds and disulphide bonds

D
pH does not affect the primary structure of protein.

Solution

pH does not affect the primary structure of protein (pH effects the tertiary structure).
Question 14
1 / -0

Major product obtained on reaction of 3-Phenyl propene with HBr in presence of organic peroxide

A
3- Phenyl 1- bromopropane

B
1 –Phenyl -3- bromopropane

C
1-Phenyl -2-bromopropane

D
3-Phenyl -2- bromopropane

Solution

1 – Phenyl -3 - bromopropane

\(((C_6H_5)CH_2CH=CH_2+HBr\) (organic peroxide) \(\rightarrow(C_6H_5)CH_2CH_2CH_2Br\) anti-Markovnikov addition).
Question 15
1 / -0

Which of the following is a correct statement for \(C_2H_5Br?\)

A
It reacts with metallic Na to give ethane.

B
It gives nitroethane on heating with aqueous solution of \(AgNO_2\)

C
It gives \(C_2H_5OH\) on boiling with alcoholic potash.

D
It forms diethylthioether on heating with alcoholic KSH.

Solution

It gives nitroethane on heating with aqueous solution of \(AgNO_2\)

\((C_2H_5Br\) reacts with metallic Na to give butane, gives ethene on boiling with alcoholic potash. and forms \(C_2H_5SH\) (thiol) on heating with alcoholic KSH).
Question 16
1 / -0

Covalency of nitrogen is restricted to:

A
2

B
3

C
4

D
5

Solution

4 (Covalency of nitrogen is restricted to 4 due to non availability of d orbitals).
Question 17
1 / -0

Solubility of gases in liquids decreases with rise in temperature because dissolution is an:

A
endothermic and reversible process

B
exothermic and reversible process

C
endothermic and irreversible process

D
exothermic and irreversible process

Solution

Exothermic and reversible process (According to Le -Chatlier principle Solubility of gases in liquids decreases with rise in temperature).
Question 18
1 / -0

All elements of Group 15 show allotropy except:

A
Nitrogen

B
Arsenic

C
Antimony

D
Bismuth

Solution

Nitrogen (Due to small size and high electronegativity N-N is weak).
Question 19
1 / -0

Which of the following is a polysaccharide?

A
glucose

B
maltose

C
glycogen

D
lactose

Solution

Glycogen (It is a polymer of glucose).
Question 20
1 / -0

Substance having the lowest boiling point:

A
Hydrogen

B
Oxygen

C
Nitrogen

D
Helium

Solution

Helium: (He is monoatomic and has low atomic mass)

It belongs to Nobel gases group (group -18) and they have very least inter-atomic attraction due to which their boiling points are very low.
Question 21
1 / -0

Lower molecular mass alcohols are:

A
miscible in limited amount of water

B
miscible in excess of water

C
miscible in water in all proportions

D
immiscible in water

Solution

Miscible in water in all proportions Lower molecular mass alcohols are able to form hydrogen bonds with water.
Question 22
1 / -0

In which of the following cases blood cells will shrink:

A
when placed in water containing more than 0.9% (mass/ volume) NaCl solution.

B
when placed in water containing less than 0.9% (mass /volume) NaCl solution.

C
when placed in water containing 0.9% (mass/volume) NaCl solution.

D
when placed in distilled water.

Solution

When placed in water containing more than 0.9% (mass/ volume) NaCl solution because fluid inside blood cells is isotonic with 0.9% NaCl solution. When concentration of solute outside of the cell is increased then due to osmosis the solvent inside the cell come out thus blood cell get shrink.
Question 23
1 / -0

How much ethyl alcohol must be added to 1 litre of water so that the solution will freeze at \(–14^\circ C?\,(K_f\) for water \(=1.86^\circ C/mol)\)

A
7.5 mol

B
8.5 mol

C
9.5 mol

D
10.5 mol

Solution

7.5 mol

\(\triangle T_f=K_f\,m\)

\(\triangle T_f=K_f\,\frac{n_2\times1000}{w_1}\)

\(14=1.86\times\frac{n_2\times1000}{1000}\)

\(n_2=7.5\,mol.\)
Question 24
1 / -0

On partial hydrolysis, \(XeF_6\) gives:

A
\(XeO_3+4HF\)

B
\(XeO_2F+HF\)

C
\(XeOF_4+H_2\)

D
\(XeO_2F_2+4HF\)

Solution

\(XeO_2F_2+4HF\)

\(XeF_4+H_2O\rightarrow XeO_2F_2+4HF\)
Question 25
1 / -0

Which one of the following statement is correct about sucrose :

A
It can reduce tollen’s reagent however cannot reduce fehling’s reagent

B
It undergoes mutarotation like glucose and fructose

C
It undergoes inversion in the configuration on hydrolysis

D
It is laevorotatory in nature.

Solution

It undergoes inversion in the configuration on hydrolysis. Initially sucrose is dextro but on hydrolysis it convert into laevo because hydrolysis product is glucose and fructose in which fructose has larger coefficient of laevorotation. This is why Sucrose go inversion in configuration on hydrolysis.
Question 26
1 / -0

Phenol does not undergo nucleophilic substitution reaction easily due to:

A
acidic nature of phenol

B
partial double bond character of C-OH bond

C
partial double bond character of C-C bond

D
instability of phenoxide ion

Solution

Partial double bond character of C-OH bond.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Mix Test - 1

Result

Mix Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

Melting point of Phosphorous is less than that of Nitrogen

\(N_2\) is highly reactive while \(P_4\) is inert

Nitrogen shows higher tendency of catenation than P

N-N is weaker than P-P

Solution

Question 2

Frenkel defect

Schottky defect

metal deficiency defect

interstitial defect

Solution

Question 3

Henry’s law

Raoult’s law

Dalton’s law

Gay-Lussac's Law

Solution

Question 4

Schottky defect

Frenkel defect

Metal excess defect

Metal deficiency defect

Solution

Question 5

1,2-dicholorbenzene

1,3 -dichlorobenzene

1,4-dicholorbenzene

all isomers have same melting points

Solution

Question 6

Formation of pentaacetate of glucose with acetic anhydride.

Formation of addition product with 2,4 DNP reagent

Silver mirror formation with Tollen’s reagent

Existence of alpha and beta forms of glucose.

Solution

Question 7

\(S_N1\) reaction

Elimination reaction

\(S_N2\) reaction

Nucleophilic addition reaction

Solution

Question 8

HCl gas is produced, due to the action of sunlight.

A mixture of HOCl and HCl is produced in the presence of light

HOCl and hydrogen gas is produced

A mixture of HCl and \(ClO_3\) is produced, due to the action of sunlight

Solution

Question 9

isotropic

anisotropic

isotopic

isomeric

Solution

Question 10

sea water

sugar solution

smoke

22 carat gold

Solution

Question 11

Hydrogen bonding

Ion – dipole interaction

Dipole- dipole interaction

Van der Waal’s forces.

Solution

Question 12

\(H_2O\)

\(H_2S\)

\(H_2Se\)

\(H_2Te\)

Solution