Question 1 :
Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
C). Tube light
D). Cooking gas
Question 2 :
Balloons are filled with
Question 3 :
Which of the following does not contain a coinage metal?
A). Silver and Gold
B). Zinc and Gold
C). Copper and Silver
D). Copper and Gold
Question 4 :
Which metal pollute the air of a big city?
Question 5 :
Bell metal is an alloy of
A). nickel and copper
B). zinc and copper
C). brass and nickel
D). tin and copper
Question 6 :
Water is a good solvent of ionic salts because
A). it has a high specific heat
B). it has no colour
C). it has a high dipole moment
D). it has a high boiling point
Question 7 :
Which of the following is not an isotope of hydrogen?
Question 8 :
The main constituents of pearls are
A). calcium oxide and ammonium chloride
B). calcium carbonate and magnesium carbonate
C). aragonite and conchiolin
D). ammonium sulphate and sodium carbonate
Question 9 :
A). highly coloured alloys
B). alloys which contain mercury as one of the contents
C). alloys which have great resistance to abrasion
D). alloys which contain carbon
Question 10 :
Which of the following is the lightest metal?
Question 11 :
Which of the following metals remain in liquid for under normal conditions?
Question 12 :
Potassium Permanganate is used for purifying drinking water, because
A). it is a sterilising agent
B). it dissolves the impurities of water
C). it is a reducing agent
D). it is an oxidising agent
Question 13 :
Which of the following is an element?