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Quiz 15
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Q.1
Nitrogen in water is commonly found in the form of
Nitrous oxide
Nitrate
Nitric oxide
Nitrite
Q.2
Number of 6.023 × 10
23
atoms present in one mole of a gas at STP is
6.023 × 10
20
6.023 × 10
23
6.023 × 10
–20
6.023 × 10
–23
Q.3
Choose the incorrect statement pertaining to organic compounds
They have low melting and boiling points
They do not dissolve in water
They are not easily combustible
They contain mainly carbon and hydrogen
Q.4
The gas which emits from rice field is
Ethane
Methane
Nitrogen
All of the above
Q.5
Which of the following elements is found in all organic compounds?
Carbon
Calcium
Nitrogen
Oxygen
Q.6
Ethanol containing 5% water is known as :
Dilute alcohol
Power alcohol
Rectified spirit
Absolute alcohol
Q.7
In which of the following substances all carbon atoms are quaternary in nature ?
Graphite
Diamond
Teflon
Napthalene
Q.8
Ferrous sulphate is used in water treatment as a/an
Oxidizing agent
Reducing agent
Coagulant aid
Adsorbent
Q.9
Entropy of Universe is always
Decreasing
Zero
Constant
Increasing
Q.10
When a bond is formed between two atoms, the energy of the system will
Increase
Decrease
Remain the same
May increase or decrease
Q.11
The minimum energy required for an effective collision is
Threshold energy
Activation energy
Free energy
Internal energy
Q.12
Which of the following produces highest amount of energy upon oxidation?
Protein
Fat
Glucose
An alkane
Q.13
Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ?
Borax
Saltpetre
Hydrogen peroxide
Sodium chloride
Q.14
The structure of (HPO
3
)
3
is
Linear
Tetrahedral
Cyclic
Octahedral
Q.15
One of the following is used to dissolve noble metals. That is
Nitric acid
Hydrochloric acid
Sulphuric acid
Aqua regia
Q.16
The value of Avogadro Number is
6.023 × 10
22
6.023 × 10
23
6.023 × 10
24
6.023 × 10
25
Q.17
Mark the compound which possess ionic, covalent and coordinate bonds.
NH
4
Cl
SO
3
SO
2
H
2
O
Q.18
Alcoholic (– OH) group can be identified by :
Tollen's Reagent Test
Esterification Test
FeCl
3
Test
Ozonolysis Reaction
Q.19
The drug ‘Marijuana’ is a
Sedative
Mental stimulant
Hallucinating substance
Tranquillizer
Q.20
Aquaregia is a mixture of the following in the ratio 1 : 3 by volume
Conc. HNO
3
and conc. HCl
Conc. HNO
3
and conc. H
2
SO
4
Dil. HCl and dil. HNO
3
Conc. HCl and conc. HNO
3
Q.21
The percentage of nitrogen present in ammonium sulphate is :
27%
25%
30.5%
18%
Q.22
Ethylene is a ________ molecule.
Polar
Ionic
Covalent
Nonpolar
Q.23
The next higher homologue of C
6
H
14
is
C
7
H
14
C
7
H
12
C
6
H
12
C
7
H
16
Q.24
Charcoal is used in water treatment as a/an
Absorbent
Coagulant
Solvent
Adsorbent
Q.25
In a reaction of the type A+B -> C+D one could ensure it to be a first order reaction by :
Increasing the temperature
Increasing the concentration of a product
Increasing the concentration of a reactant
Adding a catalyst
Q.26
Which of the following has least negative electron gain enthalpy?
P
S
Cl
F
Q.27
Soap is prepared by boiling caustic soda with
Alcohol
Kerosene oil
Glycerine
Fats
Q.28
'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –
Hund's rule of maximum multiplicity
Exclusion Principle of Pauli
Uncertainty Principle of Hiesenberg
Avogadro's Law
Q.29
Spontaneous change is one in which there is:
A lowering of entropy
A lowering of free energy
Increase in free energy
An increase in Internal energy
Q.30
Which of the following kinds of spectroscopy can provide information on the energy difference between the initial and final states rather the energy levels involved in the transition?
UV absorption spectroscopy
UV photoelectron spectroscopy
Infrared absorption spectroscopy
Rotational spectroscopy
Q.31
In ice, the number of hydrogen bonds per water molecule is
1
2
4
8
Q.32
Of the following compounds of calcium, the one having highest covalent character is
CaF
2
CaCl
2
CaBr
2
Cal
3
Q.33
Which of the following is used to iodise common salt ?
Potassium iodide
Iodine
Potassium iodate
Sodium iodide
Q.34
The chief source for the production of nitrogeneous fertilizers is :
Ammonia
Nitric acid
Nitrogen
Nitrogen dioxide
Q.35
The Refrigerant 'FREON' is
Calcium Tetra Fluoride
Difluoro Dichloro Methane
Fluorspar and Felspar
Hydrofluosilicic Acid
Q.36
Aqua regia is a 1 : 3 mixture, by volume, of
Conc. nitric acid and conc. hydrochloric acid
Conc. hydrochloric acid and conc. nitric acid
Conc. nitric acid and conc. sulphuric acid
Conc. sulphuric acid and conc. nitric acid
Q.37
Which of the following is a secondary pollutant ?
NO
CO
SO
2
PAN
Q.38
Kinetics is the study of:
The rate of chemical reaction
How fast the reactions go
The mechanisms and paths of the molecules take in joining from one reactant to products
All of these are correct
Q.39
Which of the following statements are correct about chloroform?
a. Liquid fuel
b. Anaesthetic in nature
c. Produces phosgene
d. Fire extinguisher
A, C
A, B
B, C
D, A
Q.40
Which of the following is not a donor atom?
Phosphorus
Antimony
Arsenic
Aluminium
Q.41
When ice cubes are made, the entropy of water
Does not change
Decreases
Increases
May either increase or decrease depending on the process used
Q.42
Which one of the following species has the highest bond order, shortest bond length and maximum bond strength?
O
2
O
+
2
O
-
2
O
-2
2
Q.43
The number of hydrogen bonds between guanine and cytosine in DNA is
2
3
4
1
Q.44
A thick paste of cement, sand and water is called
Concrete
R.C.C.
Mortar
Kiln
Q.45
What is the most commonly used substance in fluorescent tubes?
Sodium oxide and argon
Sodium vapour and neon
Mercury vapour and argon
Mercury oxide and neon
Q.46
Which one of the following elements is used in the manufacture of safety matches?
Graphite
Phosphorus
Silicon
Sodium
Q.47
Zinc sulphide is commonly used as
Fungicide
Herbicide
Rodenticide
Deodorant
Q.48
'Fire-fighting clothes' are made from
Mica
Asbestos
Talc
Steatite
Q.49
Trinitrotoluene is
Used to melt metals
Used to fuse two metals
Used as an abrasive
Used as an explosive
Q.50
Ultraviolet radiation striking the earth is due to the depletion of
Carbon monoxide
Carbon dioxide
Ozone
Oxygen
0 h : 0 m : 1 s
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