Q.1
The chemical name of 'laughing gas' is
Q.2
Gypsum is used for improvement of:
Q.3
The metal compound commonly found in Sindhoor or Kumkum is based on
Q.4
Aspirin is common name of
Q.5
When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to
Q.6
Iodex, a pain relief balm, has the smell of ________ .
Q.7
Silver halides are used in photographic plates because they are
Q.8
The compound to which H2 does not add is
Q.9
Which one is the most reactive halogen?
Q.10
Which among the following is not a characteristic of transition metals?
Q.11
The most reactive among the halogens is
Q.12
DDT and BHC may act as
Q.13
Gunpowder consists of a mixture of
Q.14
The common refrigerant in domestic refrigerator is
Q.15
This group of alumino-silicate minerals is widely used in making electrical insulators
Q.16
Commercial Vaseline is derived from
Q.17
Which one of the following pairs is not correctly matched?
Q.18
KMnO4 can be used as
Q.19
A detergent is a
Q.20
The ore of Aluminium is
Q.21
Which of the following laser types is used in a laser printer?
Q.22
Substance used as an anti freeze in radiators of automobiles is :
Q.23
Which of the following is used to remove rust stains on cloth?
Q.24
By-product obtained by soap industry is
Q.25
Wax used for making candle is chemically a mixture of
Q.26
Who developed Hydrogen Bomb?
Q.27
Which of the following is not a nitrogenous fertilizer ?
Q.28
The pair of compounds used as anaesthetic in medicines :
Q.29
Who first published the periodic table?
Q.30
The most electronegative element among the following is
Q.31
Total number of halogen elements found in the periodic table is
Q.32
Which one element has the lowest electronegativity value
Q.33
The chemical used in embalming biological materials is
Q.34
Alum is used as
Q.35
Which is not an anasthetic agent in surgical operations?
Q.36
Chloroform can be used as
Q.37
Soap helps in better cleaning of clothes because
Q.38
Which one of the following contributes largely to the ‘green house effect’ ?
Q.39
An important green-house gas other than methane being produced from the agricultural fields is
Q.40
Adding Cl2 to benzene in the presence of AlCl3 is an example of :
Q.41
Benzene cannot undergo :
Q.42
The most commonly used chemicals in the artificial rainmaking or cloud seeding are
Q.43
Malathion is a/an
Q.44
Laughing gas is
Q.45
Electric fuse is an alloy of
Q.46
Which of the following is used for refrigeration?
Q.47
The most suitable vessel for storing concentrated sulphuric acid is
Q.48
Which one of the following nonmetals shows allotropy in the liquid state?
Q.49
Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has
Q.50
The elements with atomic numbers 9, 17, 35, 53, 85 are all
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