Q.1
Nitrogen in water is commonly found in the form of
Q.2
Number of 6.023 × 1023 atoms present in one mole of a gas at STP is
Q.3
Choose the incorrect statement pertaining to organic compounds
Q.4
The gas which emits from rice field is
Q.5
Which of the following elements is found in all organic compounds?
Q.6
Ethanol containing 5% water is known as :
Q.7
In which of the following substances all carbon atoms are quaternary in nature ?
Q.8
Ferrous sulphate is used in water treatment as a/an
Q.9
Entropy of Universe is always
Q.10
When a bond is formed between two atoms, the energy of the system will
Q.11
The minimum energy required for an effective collision is
Q.12
Which of the following produces highest amount of energy upon oxidation?
Q.13
Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ?
Q.14
The structure of (HPO3)3 is
Q.15
One of the following is used to dissolve noble metals. That is
Q.16
The value of Avogadro Number is
Q.17
Mark the compound which possess ionic, covalent and coordinate bonds.
Q.18
Alcoholic (– OH) group can be identified by :
Q.19
The drug ‘Marijuana’ is a
Q.20
Aquaregia is a mixture of the following in the ratio 1 : 3 by volume
Q.21
The percentage of nitrogen present in ammonium sulphate is :
Q.22
Ethylene is a ________ molecule.
Q.23
The next higher homologue of C6H14 is
Q.24
Charcoal is used in water treatment as a/an
Q.25
In a reaction of the type A+B -> C+D one could ensure it to be a first order reaction by :
Q.26
Which of the following has least negative electron gain enthalpy?
Q.27
Soap is prepared by boiling caustic soda with
Q.28
'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –
Q.29
Spontaneous change is one in which there is:
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?
Q.31
In ice, the number of hydrogen bonds per water molecule is
Q.32
Of the following compounds of calcium, the one having highest covalent character is
Q.33
Which of the following is used to iodise common salt ?
Q.34
The chief source for the production of nitrogeneous fertilizers is :
Q.35
The Refrigerant 'FREON' is
Q.36
Aqua regia is a 1 : 3 mixture, by volume, of
Q.37
Which of the following is a secondary pollutant ?
Q.38
Kinetics is the study of:
Q.39
Which of the following statements are correct about chloroform?
a. Liquid fuel
b. Anaesthetic in nature
c. Produces phosgene
d. Fire extinguisher
Q.40
Which of the following is not a donor atom?
Q.41
When ice cubes are made, the entropy of water
Q.42
Which one of the following species has the highest bond order, shortest bond length and maximum bond strength?
Q.43
The number of hydrogen bonds between guanine and cytosine in DNA is
Q.44
A thick paste of cement, sand and water is called
Q.45
What is the most commonly used substance in fluorescent tubes?
Q.46
Which one of the following elements is used in the manufacture of safety matches?
Q.47
Zinc sulphide is commonly used as
Q.48
'Fire-fighting clothes' are made from
Q.49
Trinitrotoluene is
Q.50
Ultraviolet radiation striking the earth is due to the depletion of
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